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Subject[PATCH v9 2/3] clk: Make clk API return per-user struct clk instances
Date
Moves clock state to struct clk_core, but takes care to change as little API as
possible.

struct clk_hw still has a pointer to a struct clk, which is the
implementation's per-user clk instance, for backwards compatibility.

The struct clk that clk_get_parent() returns isn't owned by the caller, but by
the clock implementation, so the former shouldn't call clk_put() on it.

Because some boards in mach-omap2 still register clocks statically, their clock
registration had to be updated to take into account that the clock information
is stored in struct clk_core now.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>

---
v9: * Add missing NULL checks
* Remove __clk_prepare and __clk_unprepare as they are unused
now

v7: * Add stub for __of_clk_get_by_name to fix builds without OF

v6: * Guard against NULL pointer

v4: * Remove unused function __clk_core_to_clk
* Use "core" more often as the name for struct clk_core* variables
* Make sure we don't lose information about the caller in of_clk_get_*

v3: * Rebase on top of linux-next 20141009

v2: * Remove exported functions that aren't really used outside clk.c
* Rename new internal functions to clk_core_ prefix
* Remove redundant checks for error pointers in *_get_parent
* Change __clk_create_clk to take a struct clk_hw instead
* Match the original error behavior in clk_get_sys
---
arch/arm/mach-omap2/cclock3xxx_data.c | 108 ++++--
arch/arm/mach-omap2/clock.h | 11 +-
arch/arm/mach-omap2/clock_common_data.c | 5 +-
drivers/clk/clk.c | 633 ++++++++++++++++++++------------
drivers/clk/clk.h | 5 +
drivers/clk/clkdev.c | 80 +++-
include/linux/clk-private.h | 35 +-
include/linux/clk-provider.h | 11 +-
8 files changed, 583 insertions(+), 305 deletions(-)

diff --git a/arch/arm/mach-omap2/cclock3xxx_data.c b/arch/arm/mach-omap2/cclock3xxx_data.c
index 644ff32..4305105 100644
--- a/arch/arm/mach-omap2/cclock3xxx_data.c
+++ b/arch/arm/mach-omap2/cclock3xxx_data.c
@@ -82,7 +82,7 @@ DEFINE_CLK_MUX(osc_sys_ck, osc_sys_ck_parent_names, NULL, 0x0,
OMAP3430_PRM_CLKSEL, OMAP3430_SYS_CLKIN_SEL_SHIFT,
OMAP3430_SYS_CLKIN_SEL_WIDTH, 0x0, NULL);

-DEFINE_CLK_DIVIDER(sys_ck, "osc_sys_ck", &osc_sys_ck, 0x0,
+DEFINE_CLK_DIVIDER(sys_ck, "osc_sys_ck", &osc_sys_ck_core, 0x0,
OMAP3430_PRM_CLKSRC_CTRL, OMAP_SYSCLKDIV_SHIFT,
OMAP_SYSCLKDIV_WIDTH, CLK_DIVIDER_ONE_BASED, NULL);

@@ -132,7 +132,7 @@ static struct clk_hw_omap dpll3_ck_hw = {

DEFINE_STRUCT_CLK(dpll3_ck, dpll3_ck_parent_names, dpll3_ck_ops);

-DEFINE_CLK_DIVIDER(dpll3_m2_ck, "dpll3_ck", &dpll3_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll3_m2_ck, "dpll3_ck", &dpll3_ck_core, 0x0,
OMAP_CM_REGADDR(PLL_MOD, CM_CLKSEL1),
OMAP3430_CORE_DPLL_CLKOUT_DIV_SHIFT,
OMAP3430_CORE_DPLL_CLKOUT_DIV_WIDTH,
@@ -149,12 +149,12 @@ static const struct clk_ops core_ck_ops = {};
DEFINE_STRUCT_CLK_HW_OMAP(core_ck, NULL);
DEFINE_STRUCT_CLK(core_ck, core_ck_parent_names, core_ck_ops);

-DEFINE_CLK_DIVIDER(l3_ick, "core_ck", &core_ck, 0x0,
+DEFINE_CLK_DIVIDER(l3_ick, "core_ck", &core_ck_core, 0x0,
OMAP_CM_REGADDR(CORE_MOD, CM_CLKSEL),
OMAP3430_CLKSEL_L3_SHIFT, OMAP3430_CLKSEL_L3_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);

-DEFINE_CLK_DIVIDER(l4_ick, "l3_ick", &l3_ick, 0x0,
+DEFINE_CLK_DIVIDER(l4_ick, "l3_ick", &l3_ick_core, 0x0,
OMAP_CM_REGADDR(CORE_MOD, CM_CLKSEL),
OMAP3430_CLKSEL_L4_SHIFT, OMAP3430_CLKSEL_L4_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -275,9 +275,9 @@ static struct clk_hw_omap dpll1_ck_hw = {

DEFINE_STRUCT_CLK(dpll1_ck, dpll3_ck_parent_names, dpll1_ck_ops);

-DEFINE_CLK_FIXED_FACTOR(dpll1_x2_ck, "dpll1_ck", &dpll1_ck, 0x0, 2, 1);
+DEFINE_CLK_FIXED_FACTOR(dpll1_x2_ck, "dpll1_ck", &dpll1_ck_core, 0x0, 2, 1);

-DEFINE_CLK_DIVIDER(dpll1_x2m2_ck, "dpll1_x2_ck", &dpll1_x2_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll1_x2m2_ck, "dpll1_x2_ck", &dpll1_x2_ck_core, 0x0,
OMAP_CM_REGADDR(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL),
OMAP3430_MPU_DPLL_CLKOUT_DIV_SHIFT,
OMAP3430_MPU_DPLL_CLKOUT_DIV_WIDTH,
@@ -292,7 +292,7 @@ static const char *mpu_ck_parent_names[] = {
DEFINE_STRUCT_CLK_HW_OMAP(mpu_ck, "mpu_clkdm");
DEFINE_STRUCT_CLK(mpu_ck, mpu_ck_parent_names, core_l4_ick_ops);

-DEFINE_CLK_DIVIDER(arm_fck, "mpu_ck", &mpu_ck, 0x0,
+DEFINE_CLK_DIVIDER(arm_fck, "mpu_ck", &mpu_ck_core, 0x0,
OMAP_CM_REGADDR(MPU_MOD, OMAP3430_CM_IDLEST_PLL),
OMAP3430_ST_MPU_CLK_SHIFT, OMAP3430_ST_MPU_CLK_WIDTH,
0x0, NULL);
@@ -424,7 +424,7 @@ static const struct clk_div_table dpll4_mx_ck_div_table[] = {
{ .div = 0 },
};

-DEFINE_CLK_DIVIDER(dpll4_m5_ck, "dpll4_ck", &dpll4_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll4_m5_ck, "dpll4_ck", &dpll4_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_CAM_MOD, CM_CLKSEL),
OMAP3430_CLKSEL_CAM_SHIFT, OMAP3630_CLKSEL_CAM_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -466,7 +466,7 @@ static struct clk_hw_omap dpll4_m5x2_ck_hw = {
DEFINE_STRUCT_CLK_FLAGS(dpll4_m5x2_ck, dpll4_m5x2_ck_parent_names,
dpll4_m5x2_ck_ops, CLK_SET_RATE_PARENT);

-static struct clk dpll4_m5x2_ck_3630 = {
+static struct clk_core dpll4_m5x2_ck_3630_core = {
.name = "dpll4_m5x2_ck",
.hw = &dpll4_m5x2_ck_hw.hw,
.parent_names = dpll4_m5x2_ck_parent_names,
@@ -475,6 +475,10 @@ static struct clk dpll4_m5x2_ck_3630 = {
.flags = CLK_SET_RATE_PARENT,
};

+static struct clk dpll4_m5x2_ck_3630 = {
+ .core = &dpll4_m5x2_ck_3630_core,
+};
+
static struct clk cam_mclk;

static const char *cam_mclk_parent_names[] = {
@@ -490,7 +494,7 @@ static struct clk_hw_omap cam_mclk_hw = {
.clkdm_name = "cam_clkdm",
};

-static struct clk cam_mclk = {
+static struct clk_core cam_mclk_core = {
.name = "cam_mclk",
.hw = &cam_mclk_hw.hw,
.parent_names = cam_mclk_parent_names,
@@ -499,6 +503,10 @@ static struct clk cam_mclk = {
.flags = CLK_SET_RATE_PARENT,
};

+static struct clk cam_mclk = {
+ .core = &cam_mclk_core,
+};
+
static const struct clksel_rate clkout2_src_core_rates[] = {
{ .div = 1, .val = 0, .flags = RATE_IN_3XXX },
{ .div = 0 }
@@ -514,7 +522,7 @@ static const struct clksel_rate clkout2_src_96m_rates[] = {
{ .div = 0 }
};

-DEFINE_CLK_DIVIDER(dpll4_m2_ck, "dpll4_ck", &dpll4_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll4_m2_ck, "dpll4_ck", &dpll4_ck_core, 0x0,
OMAP_CM_REGADDR(PLL_MOD, OMAP3430_CM_CLKSEL3),
OMAP3430_DIV_96M_SHIFT, OMAP3630_DIV_96M_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -538,7 +546,7 @@ static struct clk_hw_omap dpll4_m2x2_ck_hw = {

DEFINE_STRUCT_CLK(dpll4_m2x2_ck, dpll4_m2x2_ck_parent_names, dpll4_m5x2_ck_ops);

-static struct clk dpll4_m2x2_ck_3630 = {
+static struct clk_core dpll4_m2x2_ck_3630_core = {
.name = "dpll4_m2x2_ck",
.hw = &dpll4_m2x2_ck_hw.hw,
.parent_names = dpll4_m2x2_ck_parent_names,
@@ -546,6 +554,10 @@ static struct clk dpll4_m2x2_ck_3630 = {
.ops = &dpll4_m5x2_ck_3630_ops,
};

+static struct clk dpll4_m2x2_ck_3630 = {
+ .core = &dpll4_m2x2_ck_3630_core,
+};
+
static struct clk omap_96m_alwon_fck;

static const char *omap_96m_alwon_fck_parent_names[] = {
@@ -570,7 +582,7 @@ static const struct clksel_rate clkout2_src_54m_rates[] = {
{ .div = 0 }
};

-DEFINE_CLK_DIVIDER_TABLE(dpll4_m3_ck, "dpll4_ck", &dpll4_ck, 0x0,
+DEFINE_CLK_DIVIDER_TABLE(dpll4_m3_ck, "dpll4_ck", &dpll4_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_DSS_MOD, CM_CLKSEL),
OMAP3430_CLKSEL_TV_SHIFT, OMAP3630_CLKSEL_TV_WIDTH,
0, dpll4_mx_ck_div_table, NULL);
@@ -594,7 +606,7 @@ static struct clk_hw_omap dpll4_m3x2_ck_hw = {

DEFINE_STRUCT_CLK(dpll4_m3x2_ck, dpll4_m3x2_ck_parent_names, dpll4_m5x2_ck_ops);

-static struct clk dpll4_m3x2_ck_3630 = {
+static struct clk_core dpll4_m3x2_ck_3630_core = {
.name = "dpll4_m3x2_ck",
.hw = &dpll4_m3x2_ck_hw.hw,
.parent_names = dpll4_m3x2_ck_parent_names,
@@ -602,6 +614,10 @@ static struct clk dpll4_m3x2_ck_3630 = {
.ops = &dpll4_m5x2_ck_3630_ops,
};

+static struct clk dpll4_m3x2_ck_3630 = {
+ .core = &dpll4_m3x2_ck_3630_core,
+};
+
static const char *omap_54m_fck_parent_names[] = {
"dpll4_m3x2_ck", "sys_altclk",
};
@@ -677,7 +693,7 @@ static struct clk_hw_omap omap_48m_fck_hw = {

DEFINE_STRUCT_CLK(omap_48m_fck, omap_48m_fck_parent_names, omap_48m_fck_ops);

-DEFINE_CLK_FIXED_FACTOR(omap_12m_fck, "omap_48m_fck", &omap_48m_fck, 0x0, 1, 4);
+DEFINE_CLK_FIXED_FACTOR(omap_12m_fck, "omap_48m_fck", &omap_48m_fck_core, 0x0, 1, 4);

static struct clk core_12m_fck;

@@ -723,7 +739,7 @@ static const char *core_l3_ick_parent_names[] = {
DEFINE_STRUCT_CLK_HW_OMAP(core_l3_ick, "core_l3_clkdm");
DEFINE_STRUCT_CLK(core_l3_ick, core_l3_ick_parent_names, core_l4_ick_ops);

-DEFINE_CLK_FIXED_FACTOR(dpll3_m2x2_ck, "dpll3_m2_ck", &dpll3_m2_ck, 0x0, 2, 1);
+DEFINE_CLK_FIXED_FACTOR(dpll3_m2x2_ck, "dpll3_m2_ck", &dpll3_m2_ck_core, 0x0, 2, 1);

static struct clk corex2_fck;

@@ -809,7 +825,7 @@ static struct clk_hw_omap des2_ick_hw = {

DEFINE_STRUCT_CLK(des2_ick, aes2_ick_parent_names, aes2_ick_ops);

-DEFINE_CLK_DIVIDER(dpll1_fck, "core_ck", &core_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll1_fck, "core_ck", &core_ck_core, 0x0,
OMAP_CM_REGADDR(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL),
OMAP3430_MPU_CLK_SRC_SHIFT, OMAP3430_MPU_CLK_SRC_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -852,18 +868,18 @@ static struct clk_hw_omap dpll2_ck_hw = {

DEFINE_STRUCT_CLK(dpll2_ck, dpll3_ck_parent_names, dpll1_ck_ops);

-DEFINE_CLK_DIVIDER(dpll2_fck, "core_ck", &core_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll2_fck, "core_ck", &core_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSEL1_PLL),
OMAP3430_IVA2_CLK_SRC_SHIFT, OMAP3430_IVA2_CLK_SRC_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);

-DEFINE_CLK_DIVIDER(dpll2_m2_ck, "dpll2_ck", &dpll2_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll2_m2_ck, "dpll2_ck", &dpll2_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSEL2_PLL),
OMAP3430_IVA2_DPLL_CLKOUT_DIV_SHIFT,
OMAP3430_IVA2_DPLL_CLKOUT_DIV_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);

-DEFINE_CLK_DIVIDER(dpll3_m3_ck, "dpll3_ck", &dpll3_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll3_m3_ck, "dpll3_ck", &dpll3_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
OMAP3430_DIV_DPLL3_SHIFT, OMAP3430_DIV_DPLL3_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -887,7 +903,7 @@ static struct clk_hw_omap dpll3_m3x2_ck_hw = {

DEFINE_STRUCT_CLK(dpll3_m3x2_ck, dpll3_m3x2_ck_parent_names, dpll4_m5x2_ck_ops);

-static struct clk dpll3_m3x2_ck_3630 = {
+static struct clk_core dpll3_m3x2_ck_3630_core = {
.name = "dpll3_m3x2_ck",
.hw = &dpll3_m3x2_ck_hw.hw,
.parent_names = dpll3_m3x2_ck_parent_names,
@@ -895,9 +911,13 @@ static struct clk dpll3_m3x2_ck_3630 = {
.ops = &dpll4_m5x2_ck_3630_ops,
};

-DEFINE_CLK_FIXED_FACTOR(dpll3_x2_ck, "dpll3_ck", &dpll3_ck, 0x0, 2, 1);
+static struct clk dpll3_m3x2_ck_3630 = {
+ .core = &dpll3_m3x2_ck_3630_core,
+};
+
+DEFINE_CLK_FIXED_FACTOR(dpll3_x2_ck, "dpll3_ck", &dpll3_ck_core, 0x0, 2, 1);

-DEFINE_CLK_DIVIDER_TABLE(dpll4_m4_ck, "dpll4_ck", &dpll4_ck, 0x0,
+DEFINE_CLK_DIVIDER_TABLE(dpll4_m4_ck, "dpll4_ck", &dpll4_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_DSS_MOD, CM_CLKSEL),
OMAP3430_CLKSEL_DSS1_SHIFT, OMAP3630_CLKSEL_DSS1_WIDTH,
0, dpll4_mx_ck_div_table, NULL);
@@ -922,7 +942,7 @@ static struct clk_hw_omap dpll4_m4x2_ck_hw = {
DEFINE_STRUCT_CLK_FLAGS(dpll4_m4x2_ck, dpll4_m4x2_ck_parent_names,
dpll4_m5x2_ck_ops, CLK_SET_RATE_PARENT);

-static struct clk dpll4_m4x2_ck_3630 = {
+static struct clk_core dpll4_m4x2_ck_3630_core = {
.name = "dpll4_m4x2_ck",
.hw = &dpll4_m4x2_ck_hw.hw,
.parent_names = dpll4_m4x2_ck_parent_names,
@@ -931,7 +951,11 @@ static struct clk dpll4_m4x2_ck_3630 = {
.flags = CLK_SET_RATE_PARENT,
};

-DEFINE_CLK_DIVIDER(dpll4_m6_ck, "dpll4_ck", &dpll4_ck, 0x0,
+static struct clk dpll4_m4x2_ck_3630 = {
+ .core = &dpll4_m4x2_ck_3630_core,
+};
+
+DEFINE_CLK_DIVIDER(dpll4_m6_ck, "dpll4_ck", &dpll4_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
OMAP3430_DIV_DPLL4_SHIFT, OMAP3630_DIV_DPLL4_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -955,7 +979,7 @@ static struct clk_hw_omap dpll4_m6x2_ck_hw = {

DEFINE_STRUCT_CLK(dpll4_m6x2_ck, dpll4_m6x2_ck_parent_names, dpll4_m5x2_ck_ops);

-static struct clk dpll4_m6x2_ck_3630 = {
+static struct clk_core dpll4_m6x2_ck_3630_core = {
.name = "dpll4_m6x2_ck",
.hw = &dpll4_m6x2_ck_hw.hw,
.parent_names = dpll4_m6x2_ck_parent_names,
@@ -963,7 +987,11 @@ static struct clk dpll4_m6x2_ck_3630 = {
.ops = &dpll4_m5x2_ck_3630_ops,
};

-DEFINE_CLK_FIXED_FACTOR(dpll4_x2_ck, "dpll4_ck", &dpll4_ck, 0x0, 2, 1);
+static struct clk dpll4_m6x2_ck_3630 = {
+ .core = &dpll4_m6x2_ck_3630_core,
+};
+
+DEFINE_CLK_FIXED_FACTOR(dpll4_x2_ck, "dpll4_ck", &dpll4_ck_core, 0x0, 2, 1);

static struct dpll_data dpll5_dd = {
.mult_div1_reg = OMAP_CM_REGADDR(PLL_MOD, OMAP3430ES2_CM_CLKSEL4),
@@ -1000,7 +1028,7 @@ static struct clk_hw_omap dpll5_ck_hw = {

DEFINE_STRUCT_CLK(dpll5_ck, dpll3_ck_parent_names, dpll1_ck_ops);

-DEFINE_CLK_DIVIDER(dpll5_m2_ck, "dpll5_ck", &dpll5_ck, 0x0,
+DEFINE_CLK_DIVIDER(dpll5_m2_ck, "dpll5_ck", &dpll5_ck_core, 0x0,
OMAP_CM_REGADDR(PLL_MOD, OMAP3430ES2_CM_CLKSEL5),
OMAP3430ES2_DIV_120M_SHIFT, OMAP3430ES2_DIV_120M_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -1247,7 +1275,7 @@ static struct clk_hw_omap emu_src_ck_hw = {

DEFINE_STRUCT_CLK(emu_src_ck, emu_src_ck_parent_names, emu_src_ck_ops);

-DEFINE_CLK_DIVIDER(atclk_fck, "emu_src_ck", &emu_src_ck, 0x0,
+DEFINE_CLK_DIVIDER(atclk_fck, "emu_src_ck", &emu_src_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
OMAP3430_CLKSEL_ATCLK_SHIFT, OMAP3430_CLKSEL_ATCLK_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -1298,7 +1326,7 @@ static struct clk_hw_omap gfx_l3_ck_hw = {

DEFINE_STRUCT_CLK(gfx_l3_ck, core_l3_ick_parent_names, aes1_ick_ops);

-DEFINE_CLK_DIVIDER(gfx_l3_fck, "l3_ick", &l3_ick, 0x0,
+DEFINE_CLK_DIVIDER(gfx_l3_fck, "l3_ick", &l3_ick_core, 0x0,
OMAP_CM_REGADDR(GFX_MOD, CM_CLKSEL),
OMAP_CLKSEL_GFX_SHIFT, OMAP_CLKSEL_GFX_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -2498,7 +2526,7 @@ static struct clk_hw_omap omap_96m_alwon_fck_3630_hw = {
.clksel_mask = OMAP3630_CLKSEL_96M_MASK,
};

-static struct clk omap_96m_alwon_fck_3630 = {
+static struct clk_core omap_96m_alwon_fck_3630_core = {
.name = "omap_96m_alwon_fck",
.hw = &omap_96m_alwon_fck_3630_hw.hw,
.parent_names = omap_96m_alwon_fck_3630_parent_names,
@@ -2506,6 +2534,10 @@ static struct clk omap_96m_alwon_fck_3630 = {
.ops = &omap_96m_alwon_fck_3630_ops,
};

+static struct clk omap_96m_alwon_fck_3630 = {
+ .core = &omap_96m_alwon_fck_3630_core,
+};
+
static struct clk omapctrl_ick;

static struct clk_hw_omap omapctrl_ick_hw = {
@@ -2521,12 +2553,12 @@ static struct clk_hw_omap omapctrl_ick_hw = {

DEFINE_STRUCT_CLK(omapctrl_ick, aes2_ick_parent_names, aes2_ick_ops);

-DEFINE_CLK_DIVIDER(pclk_fck, "emu_src_ck", &emu_src_ck, 0x0,
+DEFINE_CLK_DIVIDER(pclk_fck, "emu_src_ck", &emu_src_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
OMAP3430_CLKSEL_PCLK_SHIFT, OMAP3430_CLKSEL_PCLK_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);

-DEFINE_CLK_DIVIDER(pclkx2_fck, "emu_src_ck", &emu_src_ck, 0x0,
+DEFINE_CLK_DIVIDER(pclkx2_fck, "emu_src_ck", &emu_src_ck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
OMAP3430_CLKSEL_PCLKX2_SHIFT, OMAP3430_CLKSEL_PCLKX2_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -2558,7 +2590,7 @@ static struct clk_hw_omap pka_ick_hw = {

DEFINE_STRUCT_CLK(pka_ick, pka_ick_parent_names, aes1_ick_ops);

-DEFINE_CLK_DIVIDER(rm_ick, "l4_ick", &l4_ick, 0x0,
+DEFINE_CLK_DIVIDER(rm_ick, "l4_ick", &l4_ick_core, 0x0,
OMAP_CM_REGADDR(WKUP_MOD, CM_CLKSEL),
OMAP3430_CLKSEL_RM_SHIFT, OMAP3430_CLKSEL_RM_WIDTH,
CLK_DIVIDER_ONE_BASED, NULL);
@@ -2819,10 +2851,10 @@ DEFINE_CLK_OMAP_MUX_GATE(ssi_ssr_fck_3430es2, "core_l4_clkdm",
ssi_ssr_fck_3430es1_ops);

DEFINE_CLK_FIXED_FACTOR(ssi_sst_fck_3430es1, "ssi_ssr_fck_3430es1",
- &ssi_ssr_fck_3430es1, 0x0, 1, 2);
+ &ssi_ssr_fck_3430es1_core, 0x0, 1, 2);

DEFINE_CLK_FIXED_FACTOR(ssi_sst_fck_3430es2, "ssi_ssr_fck_3430es2",
- &ssi_ssr_fck_3430es2, 0x0, 1, 2);
+ &ssi_ssr_fck_3430es2_core, 0x0, 1, 2);

static struct clk sys_clkout1;

@@ -2840,7 +2872,7 @@ static struct clk_hw_omap sys_clkout1_hw = {

DEFINE_STRUCT_CLK(sys_clkout1, sys_clkout1_parent_names, aes1_ick_ops);

-DEFINE_CLK_DIVIDER(sys_clkout2, "clkout2_src_ck", &clkout2_src_ck, 0x0,
+DEFINE_CLK_DIVIDER(sys_clkout2, "clkout2_src_ck", &clkout2_src_ck_core, 0x0,
OMAP3430_CM_CLKOUT_CTRL, OMAP3430_CLKOUT2_DIV_SHIFT,
OMAP3430_CLKOUT2_DIV_WIDTH, CLK_DIVIDER_POWER_OF_TWO, NULL);

@@ -2849,7 +2881,7 @@ DEFINE_CLK_MUX(traceclk_src_fck, emu_src_ck_parent_names, NULL, 0x0,
OMAP3430_TRACE_MUX_CTRL_SHIFT, OMAP3430_TRACE_MUX_CTRL_WIDTH,
0x0, NULL);

-DEFINE_CLK_DIVIDER(traceclk_fck, "traceclk_src_fck", &traceclk_src_fck, 0x0,
+DEFINE_CLK_DIVIDER(traceclk_fck, "traceclk_src_fck", &traceclk_src_fck_core, 0x0,
OMAP_CM_REGADDR(OMAP3430_EMU_MOD, CM_CLKSEL1),
OMAP3430_CLKSEL_TRACECLK_SHIFT,
OMAP3430_CLKSEL_TRACECLK_WIDTH, CLK_DIVIDER_ONE_BASED, NULL);
diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h
index a4282e7..c5b3a7f 100644
--- a/arch/arm/mach-omap2/clock.h
+++ b/arch/arm/mach-omap2/clock.h
@@ -40,23 +40,29 @@ struct omap_clk {
struct clockdomain;

#define DEFINE_STRUCT_CLK(_name, _parent_array_name, _clkops_name) \
- static struct clk _name = { \
+ static struct clk_core _name##_core = { \
.name = #_name, \
.hw = &_name##_hw.hw, \
.parent_names = _parent_array_name, \
.num_parents = ARRAY_SIZE(_parent_array_name), \
.ops = &_clkops_name, \
+ }; \
+ static struct clk _name = { \
+ .core = &_name##_core, \
};

#define DEFINE_STRUCT_CLK_FLAGS(_name, _parent_array_name, \
_clkops_name, _flags) \
- static struct clk _name = { \
+ static struct clk_core _name##_core = { \
.name = #_name, \
.hw = &_name##_hw.hw, \
.parent_names = _parent_array_name, \
.num_parents = ARRAY_SIZE(_parent_array_name), \
.ops = &_clkops_name, \
.flags = _flags, \
+ }; \
+ static struct clk _name = { \
+ .core = &_name##_core, \
};

#define DEFINE_STRUCT_CLK_HW_OMAP(_name, _clkdm_name) \
@@ -248,6 +254,7 @@ extern const struct clksel_rate gpt_32k_rates[];
extern const struct clksel_rate gpt_sys_rates[];
extern const struct clksel_rate gfx_l3_rates[];
extern const struct clksel_rate dsp_ick_rates[];
+extern struct clk_core dummy_ck_core;
extern struct clk dummy_ck;

extern const struct clk_hw_omap_ops clkhwops_iclk_wait;
diff --git a/arch/arm/mach-omap2/clock_common_data.c b/arch/arm/mach-omap2/clock_common_data.c
index ef4d21b..febd0a2 100644
--- a/arch/arm/mach-omap2/clock_common_data.c
+++ b/arch/arm/mach-omap2/clock_common_data.c
@@ -119,8 +119,11 @@ const struct clksel_rate div31_1to31_rates[] = {

static struct clk_ops dummy_ck_ops = {};

-struct clk dummy_ck = {
+struct clk_core dummy_ck_core = {
.name = "dummy_clk",
.ops = &dummy_ck_ops,
.flags = CLK_IS_BASIC,
};
+struct clk dummy_ck = {
+ .core = &dummy_ck_core,
+};
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 97f3425..f2a1ff3 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -37,6 +37,14 @@ static HLIST_HEAD(clk_root_list);
static HLIST_HEAD(clk_orphan_list);
static LIST_HEAD(clk_notifier_list);

+static long clk_core_get_accuracy(struct clk_core *clk);
+static unsigned long clk_core_get_rate(struct clk_core *clk);
+static int clk_core_get_phase(struct clk_core *clk);
+static bool clk_core_is_prepared(struct clk_core *clk);
+static bool clk_core_is_enabled(struct clk_core *clk);
+static long clk_core_round_rate(struct clk_core *core, unsigned long rate);
+static struct clk_core *clk_core_lookup(const char *name);
+
/*** locking ***/
static void clk_prepare_lock(void)
{
@@ -114,7 +122,7 @@ static struct hlist_head *orphan_list[] = {
NULL,
};

-static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level)
+static void clk_summary_show_one(struct seq_file *s, struct clk_core *c, int level)
{
if (!c)
return;
@@ -122,14 +130,14 @@ static void clk_summary_show_one(struct seq_file *s, struct clk *c, int level)
seq_printf(s, "%*s%-*s %11d %12d %11lu %10lu %-3d\n",
level * 3 + 1, "",
30 - level * 3, c->name,
- c->enable_count, c->prepare_count, clk_get_rate(c),
- clk_get_accuracy(c), clk_get_phase(c));
+ c->enable_count, c->prepare_count, clk_core_get_rate(c),
+ clk_core_get_accuracy(c), clk_core_get_phase(c));
}

-static void clk_summary_show_subtree(struct seq_file *s, struct clk *c,
+static void clk_summary_show_subtree(struct seq_file *s, struct clk_core *c,
int level)
{
- struct clk *child;
+ struct clk_core *child;

if (!c)
return;
@@ -142,7 +150,7 @@ static void clk_summary_show_subtree(struct seq_file *s, struct clk *c,

static int clk_summary_show(struct seq_file *s, void *data)
{
- struct clk *c;
+ struct clk_core *c;
struct hlist_head **lists = (struct hlist_head **)s->private;

seq_puts(s, " clock enable_cnt prepare_cnt rate accuracy phase\n");
@@ -172,7 +180,7 @@ static const struct file_operations clk_summary_fops = {
.release = single_release,
};

-static void clk_dump_one(struct seq_file *s, struct clk *c, int level)
+static void clk_dump_one(struct seq_file *s, struct clk_core *c, int level)
{
if (!c)
return;
@@ -180,14 +188,14 @@ static void clk_dump_one(struct seq_file *s, struct clk *c, int level)
seq_printf(s, "\"%s\": { ", c->name);
seq_printf(s, "\"enable_count\": %d,", c->enable_count);
seq_printf(s, "\"prepare_count\": %d,", c->prepare_count);
- seq_printf(s, "\"rate\": %lu", clk_get_rate(c));
- seq_printf(s, "\"accuracy\": %lu", clk_get_accuracy(c));
- seq_printf(s, "\"phase\": %d", clk_get_phase(c));
+ seq_printf(s, "\"rate\": %lu", clk_core_get_rate(c));
+ seq_printf(s, "\"accuracy\": %lu", clk_core_get_accuracy(c));
+ seq_printf(s, "\"phase\": %d", clk_core_get_phase(c));
}

-static void clk_dump_subtree(struct seq_file *s, struct clk *c, int level)
+static void clk_dump_subtree(struct seq_file *s, struct clk_core *c, int level)
{
- struct clk *child;
+ struct clk_core *child;

if (!c)
return;
@@ -204,7 +212,7 @@ static void clk_dump_subtree(struct seq_file *s, struct clk *c, int level)

static int clk_dump(struct seq_file *s, void *data)
{
- struct clk *c;
+ struct clk_core *c;
bool first_node = true;
struct hlist_head **lists = (struct hlist_head **)s->private;

@@ -240,7 +248,7 @@ static const struct file_operations clk_dump_fops = {
.release = single_release,
};

-static int clk_debug_create_one(struct clk *clk, struct dentry *pdentry)
+static int clk_debug_create_one(struct clk_core *clk, struct dentry *pdentry)
{
struct dentry *d;
int ret = -ENOMEM;
@@ -315,7 +323,7 @@ out:
* initialized. Otherwise it bails out early since the debugfs clk tree
* will be created lazily by clk_debug_init as part of a late_initcall.
*/
-static int clk_debug_register(struct clk *clk)
+static int clk_debug_register(struct clk_core *clk)
{
int ret = 0;

@@ -340,7 +348,7 @@ unlock:
* debugfs clk tree if clk->dentry points to debugfs created by
* clk_debug_register in __clk_init.
*/
-static void clk_debug_unregister(struct clk *clk)
+static void clk_debug_unregister(struct clk_core *clk)
{
mutex_lock(&clk_debug_lock);
if (!clk->dentry)
@@ -358,8 +366,8 @@ struct dentry *clk_debugfs_add_file(struct clk_hw *hw, char *name, umode_t mode,
{
struct dentry *d = NULL;

- if (hw->clk->dentry)
- d = debugfs_create_file(name, mode, hw->clk->dentry, data, fops);
+ if (hw->core->dentry)
+ d = debugfs_create_file(name, mode, hw->core->dentry, data, fops);

return d;
}
@@ -379,7 +387,7 @@ EXPORT_SYMBOL_GPL(clk_debugfs_add_file);
*/
static int __init clk_debug_init(void)
{
- struct clk *clk;
+ struct clk_core *clk;
struct dentry *d;

rootdir = debugfs_create_dir("clk", NULL);
@@ -418,19 +426,20 @@ static int __init clk_debug_init(void)
}
late_initcall(clk_debug_init);
#else
-static inline int clk_debug_register(struct clk *clk) { return 0; }
-static inline void clk_debug_reparent(struct clk *clk, struct clk *new_parent)
+static inline int clk_debug_register(struct clk_core *clk) { return 0; }
+static inline void clk_debug_reparent(struct clk_core *clk,
+ struct clk_core *new_parent)
{
}
-static inline void clk_debug_unregister(struct clk *clk)
+static inline void clk_debug_unregister(struct clk_core *clk)
{
}
#endif

/* caller must hold prepare_lock */
-static void clk_unprepare_unused_subtree(struct clk *clk)
+static void clk_unprepare_unused_subtree(struct clk_core *clk)
{
- struct clk *child;
+ struct clk_core *child;

hlist_for_each_entry(child, &clk->children, child_node)
clk_unprepare_unused_subtree(child);
@@ -441,7 +450,7 @@ static void clk_unprepare_unused_subtree(struct clk *clk)
if (clk->flags & CLK_IGNORE_UNUSED)
return;

- if (__clk_is_prepared(clk)) {
+ if (clk_core_is_prepared(clk)) {
if (clk->ops->unprepare_unused)
clk->ops->unprepare_unused(clk->hw);
else if (clk->ops->unprepare)
@@ -450,9 +459,9 @@ static void clk_unprepare_unused_subtree(struct clk *clk)
}

/* caller must hold prepare_lock */
-static void clk_disable_unused_subtree(struct clk *clk)
+static void clk_disable_unused_subtree(struct clk_core *clk)
{
- struct clk *child;
+ struct clk_core *child;
unsigned long flags;

hlist_for_each_entry(child, &clk->children, child_node)
@@ -471,7 +480,7 @@ static void clk_disable_unused_subtree(struct clk *clk)
* sequence. call .disable_unused if available, otherwise fall
* back to .disable
*/
- if (__clk_is_enabled(clk)) {
+ if (clk_core_is_enabled(clk)) {
if (clk->ops->disable_unused)
clk->ops->disable_unused(clk->hw);
else if (clk->ops->disable)
@@ -492,7 +501,7 @@ __setup("clk_ignore_unused", clk_ignore_unused_setup);

static int clk_disable_unused(void)
{
- struct clk *clk;
+ struct clk_core *clk;

if (clk_ignore_unused) {
pr_warn("clk: Not disabling unused clocks\n");
@@ -523,48 +532,65 @@ late_initcall_sync(clk_disable_unused);

const char *__clk_get_name(struct clk *clk)
{
- return !clk ? NULL : clk->name;
+ return !clk ? NULL : clk->core->name;
}
EXPORT_SYMBOL_GPL(__clk_get_name);

struct clk_hw *__clk_get_hw(struct clk *clk)
{
- return !clk ? NULL : clk->hw;
+ return !clk ? NULL : clk->core->hw;
}
EXPORT_SYMBOL_GPL(__clk_get_hw);

u8 __clk_get_num_parents(struct clk *clk)
{
- return !clk ? 0 : clk->num_parents;
+ return !clk ? 0 : clk->core->num_parents;
}
EXPORT_SYMBOL_GPL(__clk_get_num_parents);

struct clk *__clk_get_parent(struct clk *clk)
{
- return !clk ? NULL : clk->parent;
+ if (!clk)
+ return NULL;
+
+ /* TODO: Create a per-user clk and change callers to call clk_put */
+ return !clk->core->parent ? NULL : clk->core->parent->hw->clk;
}
EXPORT_SYMBOL_GPL(__clk_get_parent);

-struct clk *clk_get_parent_by_index(struct clk *clk, u8 index)
+static struct clk_core *clk_core_get_parent_by_index(struct clk_core *clk,
+ u8 index)
{
if (!clk || index >= clk->num_parents)
return NULL;
else if (!clk->parents)
- return __clk_lookup(clk->parent_names[index]);
+ return clk_core_lookup(clk->parent_names[index]);
else if (!clk->parents[index])
return clk->parents[index] =
- __clk_lookup(clk->parent_names[index]);
+ clk_core_lookup(clk->parent_names[index]);
else
return clk->parents[index];
}
+
+struct clk *clk_get_parent_by_index(struct clk *clk, u8 index)
+{
+ struct clk_core *parent;
+
+ if (!clk)
+ return NULL;
+
+ parent = clk_core_get_parent_by_index(clk->core, index);
+
+ return !parent ? NULL : parent->hw->clk;
+}
EXPORT_SYMBOL_GPL(clk_get_parent_by_index);

unsigned int __clk_get_enable_count(struct clk *clk)
{
- return !clk ? 0 : clk->enable_count;
+ return !clk ? 0 : clk->core->enable_count;
}

-unsigned long __clk_get_rate(struct clk *clk)
+static unsigned long clk_core_get_rate_nolock(struct clk_core *clk)
{
unsigned long ret;

@@ -584,9 +610,17 @@ unsigned long __clk_get_rate(struct clk *clk)
out:
return ret;
}
+
+unsigned long __clk_get_rate(struct clk *clk)
+{
+ if (!clk)
+ return 0;
+
+ return clk_core_get_rate_nolock(clk->core);
+}
EXPORT_SYMBOL_GPL(__clk_get_rate);

-static unsigned long __clk_get_accuracy(struct clk *clk)
+static unsigned long __clk_get_accuracy(struct clk_core *clk)
{
if (!clk)
return 0;
@@ -596,11 +630,11 @@ static unsigned long __clk_get_accuracy(struct clk *clk)

unsigned long __clk_get_flags(struct clk *clk)
{
- return !clk ? 0 : clk->flags;
+ return !clk ? 0 : clk->core->flags;
}
EXPORT_SYMBOL_GPL(__clk_get_flags);

-bool __clk_is_prepared(struct clk *clk)
+static bool clk_core_is_prepared(struct clk_core *clk)
{
int ret;

@@ -621,7 +655,15 @@ out:
return !!ret;
}

-bool __clk_is_enabled(struct clk *clk)
+bool __clk_is_prepared(struct clk *clk)
+{
+ if (!clk)
+ return false;
+
+ return clk_core_is_prepared(clk->core);
+}
+
+static bool clk_core_is_enabled(struct clk_core *clk)
{
int ret;

@@ -641,12 +683,20 @@ bool __clk_is_enabled(struct clk *clk)
out:
return !!ret;
}
+
+bool __clk_is_enabled(struct clk *clk)
+{
+ if (!clk)
+ return false;
+
+ return clk_core_is_enabled(clk->core);
+}
EXPORT_SYMBOL_GPL(__clk_is_enabled);

-static struct clk *__clk_lookup_subtree(const char *name, struct clk *clk)
+static struct clk_core *__clk_lookup_subtree(const char *name, struct clk_core *clk)
{
- struct clk *child;
- struct clk *ret;
+ struct clk_core *child;
+ struct clk_core *ret;

if (!strcmp(clk->name, name))
return clk;
@@ -660,10 +710,10 @@ static struct clk *__clk_lookup_subtree(const char *name, struct clk *clk)
return NULL;
}

-struct clk *__clk_lookup(const char *name)
+static struct clk_core *clk_core_lookup(const char *name)
{
- struct clk *root_clk;
- struct clk *ret;
+ struct clk_core *root_clk;
+ struct clk_core *ret;

if (!name)
return NULL;
@@ -685,6 +735,13 @@ struct clk *__clk_lookup(const char *name)
return NULL;
}

+struct clk *__clk_lookup(const char *name)
+{
+ struct clk_core *core = clk_core_lookup(name);
+
+ return !core ? NULL : core->hw->clk;
+}
+
/*
* Helper for finding best parent to provide a given frequency. This can be used
* directly as a determine_rate callback (e.g. for a mux), or from a more
@@ -694,32 +751,32 @@ long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk_hw **best_parent_p)
{
- struct clk *clk = hw->clk, *parent, *best_parent = NULL;
+ struct clk_core *core = hw->clk->core, *parent, *best_parent = NULL;
int i, num_parents;
unsigned long parent_rate, best = 0;

/* if NO_REPARENT flag set, pass through to current parent */
- if (clk->flags & CLK_SET_RATE_NO_REPARENT) {
- parent = clk->parent;
- if (clk->flags & CLK_SET_RATE_PARENT)
- best = __clk_round_rate(parent, rate);
+ if (core->flags & CLK_SET_RATE_NO_REPARENT) {
+ parent = core->parent;
+ if (core->flags & CLK_SET_RATE_PARENT)
+ best = clk_core_round_rate(parent, rate);
else if (parent)
- best = __clk_get_rate(parent);
+ best = clk_core_get_rate(parent);
else
- best = __clk_get_rate(clk);
+ best = clk_core_get_rate(core);
goto out;
}

/* find the parent that can provide the fastest rate <= rate */
- num_parents = clk->num_parents;
+ num_parents = core->num_parents;
for (i = 0; i < num_parents; i++) {
- parent = clk_get_parent_by_index(clk, i);
+ parent = clk_core_get_parent_by_index(core, i);
if (!parent)
continue;
- if (clk->flags & CLK_SET_RATE_PARENT)
- parent_rate = __clk_round_rate(parent, rate);
+ if (core->flags & CLK_SET_RATE_PARENT)
+ parent_rate = clk_core_round_rate(parent, rate);
else
- parent_rate = __clk_get_rate(parent);
+ parent_rate = clk_core_get_rate(parent);
if (parent_rate <= rate && parent_rate > best) {
best_parent = parent;
best = parent_rate;
@@ -737,7 +794,7 @@ EXPORT_SYMBOL_GPL(__clk_mux_determine_rate);

/*** clk api ***/

-void __clk_unprepare(struct clk *clk)
+static void clk_core_unprepare(struct clk_core *clk)
{
if (!clk)
return;
@@ -753,7 +810,7 @@ void __clk_unprepare(struct clk *clk)
if (clk->ops->unprepare)
clk->ops->unprepare(clk->hw);

- __clk_unprepare(clk->parent);
+ clk_core_unprepare(clk->parent);
}

/**
@@ -773,12 +830,12 @@ void clk_unprepare(struct clk *clk)
return;

clk_prepare_lock();
- __clk_unprepare(clk);
+ clk_core_unprepare(clk->core);
clk_prepare_unlock();
}
EXPORT_SYMBOL_GPL(clk_unprepare);

-int __clk_prepare(struct clk *clk)
+static int clk_core_prepare(struct clk_core *clk)
{
int ret = 0;

@@ -786,14 +843,14 @@ int __clk_prepare(struct clk *clk)
return 0;

if (clk->prepare_count == 0) {
- ret = __clk_prepare(clk->parent);
+ ret = clk_core_prepare(clk->parent);
if (ret)
return ret;

if (clk->ops->prepare) {
ret = clk->ops->prepare(clk->hw);
if (ret) {
- __clk_unprepare(clk->parent);
+ clk_core_unprepare(clk->parent);
return ret;
}
}
@@ -820,15 +877,18 @@ int clk_prepare(struct clk *clk)
{
int ret;

+ if (IS_ERR_OR_NULL(clk))
+ return PTR_ERR(clk);
+
clk_prepare_lock();
- ret = __clk_prepare(clk);
+ ret = clk_core_prepare(clk->core);
clk_prepare_unlock();

return ret;
}
EXPORT_SYMBOL_GPL(clk_prepare);

-static void __clk_disable(struct clk *clk)
+static void clk_core_disable(struct clk_core *clk)
{
if (!clk)
return;
@@ -842,7 +902,15 @@ static void __clk_disable(struct clk *clk)
if (clk->ops->disable)
clk->ops->disable(clk->hw);

- __clk_disable(clk->parent);
+ clk_core_disable(clk->parent);
+}
+
+static void __clk_disable(struct clk *clk)
+{
+ if (!clk)
+ return;
+
+ clk_core_disable(clk->core);
}

/**
@@ -870,7 +938,7 @@ void clk_disable(struct clk *clk)
}
EXPORT_SYMBOL_GPL(clk_disable);

-static int __clk_enable(struct clk *clk)
+static int clk_core_enable(struct clk_core *clk)
{
int ret = 0;

@@ -881,7 +949,7 @@ static int __clk_enable(struct clk *clk)
return -ESHUTDOWN;

if (clk->enable_count == 0) {
- ret = __clk_enable(clk->parent);
+ ret = clk_core_enable(clk->parent);

if (ret)
return ret;
@@ -889,7 +957,7 @@ static int __clk_enable(struct clk *clk)
if (clk->ops->enable) {
ret = clk->ops->enable(clk->hw);
if (ret) {
- __clk_disable(clk->parent);
+ clk_core_disable(clk->parent);
return ret;
}
}
@@ -899,6 +967,14 @@ static int __clk_enable(struct clk *clk)
return 0;
}

+static int __clk_enable(struct clk *clk)
+{
+ if (!clk)
+ return 0;
+
+ return clk_core_enable(clk->core);
+}
+
/**
* clk_enable - ungate a clock
* @clk: the clk being ungated
@@ -925,17 +1001,11 @@ int clk_enable(struct clk *clk)
}
EXPORT_SYMBOL_GPL(clk_enable);

-/**
- * __clk_round_rate - round the given rate for a clk
- * @clk: round the rate of this clock
- * @rate: the rate which is to be rounded
- *
- * Caller must hold prepare_lock. Useful for clk_ops such as .set_rate
- */
-unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
+static unsigned long clk_core_round_rate_nolock(struct clk_core *clk,
+ unsigned long rate)
{
unsigned long parent_rate = 0;
- struct clk *parent;
+ struct clk_core *parent;
struct clk_hw *parent_hw;

if (!clk)
@@ -952,12 +1022,38 @@ unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
} else if (clk->ops->round_rate)
return clk->ops->round_rate(clk->hw, rate, &parent_rate);
else if (clk->flags & CLK_SET_RATE_PARENT)
- return __clk_round_rate(clk->parent, rate);
+ return clk_core_round_rate_nolock(clk->parent, rate);
else
return clk->rate;
}
+
+/**
+ * __clk_round_rate - round the given rate for a clk
+ * @clk: round the rate of this clock
+ * @rate: the rate which is to be rounded
+ *
+ * Caller must hold prepare_lock. Useful for clk_ops such as .set_rate
+ */
+unsigned long __clk_round_rate(struct clk *clk, unsigned long rate)
+{
+ if (!clk)
+ return 0;
+
+ return clk_core_round_rate_nolock(clk->core, rate);
+}
EXPORT_SYMBOL_GPL(__clk_round_rate);

+static long clk_core_round_rate(struct clk_core *core, unsigned long rate)
+{
+ unsigned long ret;
+
+ clk_prepare_lock();
+ ret = clk_core_round_rate_nolock(core, rate);
+ clk_prepare_unlock();
+
+ return ret;
+}
+
/**
* clk_round_rate - round the given rate for a clk
* @clk: the clk for which we are rounding a rate
@@ -969,13 +1065,10 @@ EXPORT_SYMBOL_GPL(__clk_round_rate);
*/
long clk_round_rate(struct clk *clk, unsigned long rate)
{
- unsigned long ret;
-
- clk_prepare_lock();
- ret = __clk_round_rate(clk, rate);
- clk_prepare_unlock();
+ if (!clk)
+ return 0;

- return ret;
+ return clk_core_round_rate(clk->core, rate);
}
EXPORT_SYMBOL_GPL(clk_round_rate);

@@ -993,22 +1086,21 @@ EXPORT_SYMBOL_GPL(clk_round_rate);
* called if all went well, or NOTIFY_STOP or NOTIFY_BAD immediately if
* a driver returns that.
*/
-static int __clk_notify(struct clk *clk, unsigned long msg,
+static int __clk_notify(struct clk_core *clk, unsigned long msg,
unsigned long old_rate, unsigned long new_rate)
{
struct clk_notifier *cn;
struct clk_notifier_data cnd;
int ret = NOTIFY_DONE;

- cnd.clk = clk;
cnd.old_rate = old_rate;
cnd.new_rate = new_rate;

list_for_each_entry(cn, &clk_notifier_list, node) {
- if (cn->clk == clk) {
+ if (cn->clk->core == clk) {
+ cnd.clk = cn->clk;
ret = srcu_notifier_call_chain(&cn->notifier_head, msg,
&cnd);
- break;
}
}

@@ -1026,10 +1118,10 @@ static int __clk_notify(struct clk *clk, unsigned long msg,
*
* Caller must hold prepare_lock.
*/
-static void __clk_recalc_accuracies(struct clk *clk)
+static void __clk_recalc_accuracies(struct clk_core *clk)
{
unsigned long parent_accuracy = 0;
- struct clk *child;
+ struct clk_core *child;

if (clk->parent)
parent_accuracy = clk->parent->accuracy;
@@ -1044,16 +1136,7 @@ static void __clk_recalc_accuracies(struct clk *clk)
__clk_recalc_accuracies(child);
}

-/**
- * clk_get_accuracy - return the accuracy of clk
- * @clk: the clk whose accuracy is being returned
- *
- * Simply returns the cached accuracy of the clk, unless
- * CLK_GET_ACCURACY_NOCACHE flag is set, which means a recalc_rate will be
- * issued.
- * If clk is NULL then returns 0.
- */
-long clk_get_accuracy(struct clk *clk)
+static long clk_core_get_accuracy(struct clk_core *clk)
{
unsigned long accuracy;

@@ -1066,9 +1149,24 @@ long clk_get_accuracy(struct clk *clk)

return accuracy;
}
+
+/**
+ * clk_get_accuracy - return the accuracy of clk
+ * @clk: the clk whose accuracy is being returned
+ *
+ * Simply returns the cached accuracy of the clk, unless
+ * CLK_GET_ACCURACY_NOCACHE flag is set, which means a recalc_rate will be
+ * issued.
+ * If clk is NULL then returns 0.
+ */
+long clk_get_accuracy(struct clk *clk)
+{
+ return clk_core_get_accuracy(clk->core);
+}
EXPORT_SYMBOL_GPL(clk_get_accuracy);

-static unsigned long clk_recalc(struct clk *clk, unsigned long parent_rate)
+static unsigned long clk_recalc(struct clk_core *clk,
+ unsigned long parent_rate)
{
if (clk->ops->recalc_rate)
return clk->ops->recalc_rate(clk->hw, parent_rate);
@@ -1089,11 +1187,11 @@ static unsigned long clk_recalc(struct clk *clk, unsigned long parent_rate)
*
* Caller must hold prepare_lock.
*/
-static void __clk_recalc_rates(struct clk *clk, unsigned long msg)
+static void __clk_recalc_rates(struct clk_core *clk, unsigned long msg)
{
unsigned long old_rate;
unsigned long parent_rate = 0;
- struct clk *child;
+ struct clk_core *child;

old_rate = clk->rate;

@@ -1113,15 +1211,7 @@ static void __clk_recalc_rates(struct clk *clk, unsigned long msg)
__clk_recalc_rates(child, msg);
}

-/**
- * clk_get_rate - return the rate of clk
- * @clk: the clk whose rate is being returned
- *
- * Simply returns the cached rate of the clk, unless CLK_GET_RATE_NOCACHE flag
- * is set, which means a recalc_rate will be issued.
- * If clk is NULL then returns 0.
- */
-unsigned long clk_get_rate(struct clk *clk)
+static unsigned long clk_core_get_rate(struct clk_core *clk)
{
unsigned long rate;

@@ -1130,14 +1220,29 @@ unsigned long clk_get_rate(struct clk *clk)
if (clk && (clk->flags & CLK_GET_RATE_NOCACHE))
__clk_recalc_rates(clk, 0);

- rate = __clk_get_rate(clk);
+ rate = clk_core_get_rate_nolock(clk);
clk_prepare_unlock();

return rate;
}
+EXPORT_SYMBOL_GPL(clk_core_get_rate);
+
+/**
+ * clk_get_rate - return the rate of clk
+ * @clk: the clk whose rate is being returned
+ *
+ * Simply returns the cached rate of the clk, unless CLK_GET_RATE_NOCACHE flag
+ * is set, which means a recalc_rate will be issued.
+ * If clk is NULL then returns 0.
+ */
+unsigned long clk_get_rate(struct clk *clk)
+{
+ return clk_core_get_rate(clk->core);
+}
EXPORT_SYMBOL_GPL(clk_get_rate);

-static int clk_fetch_parent_index(struct clk *clk, struct clk *parent)
+static int clk_fetch_parent_index(struct clk_core *clk,
+ struct clk_core *parent)
{
int i;

@@ -1151,7 +1256,7 @@ static int clk_fetch_parent_index(struct clk *clk, struct clk *parent)
/*
* find index of new parent clock using cached parent ptrs,
* or if not yet cached, use string name comparison and cache
- * them now to avoid future calls to __clk_lookup.
+ * them now to avoid future calls to clk_core_lookup.
*/
for (i = 0; i < clk->num_parents; i++) {
if (clk->parents[i] == parent)
@@ -1161,7 +1266,7 @@ static int clk_fetch_parent_index(struct clk *clk, struct clk *parent)
continue;

if (!strcmp(clk->parent_names[i], parent->name)) {
- clk->parents[i] = __clk_lookup(parent->name);
+ clk->parents[i] = clk_core_lookup(parent->name);
return i;
}
}
@@ -1169,7 +1274,7 @@ static int clk_fetch_parent_index(struct clk *clk, struct clk *parent)
return -EINVAL;
}

-static void clk_reparent(struct clk *clk, struct clk *new_parent)
+static void clk_reparent(struct clk_core *clk, struct clk_core *new_parent)
{
hlist_del(&clk->child_node);

@@ -1186,10 +1291,11 @@ static void clk_reparent(struct clk *clk, struct clk *new_parent)
clk->parent = new_parent;
}

-static struct clk *__clk_set_parent_before(struct clk *clk, struct clk *parent)
+static struct clk_core *__clk_set_parent_before(struct clk_core *clk,
+ struct clk_core *parent)
{
unsigned long flags;
- struct clk *old_parent = clk->parent;
+ struct clk_core *old_parent = clk->parent;

/*
* Migrate prepare state between parents and prevent race with
@@ -1209,9 +1315,9 @@ static struct clk *__clk_set_parent_before(struct clk *clk, struct clk *parent)
* See also: Comment for clk_set_parent() below.
*/
if (clk->prepare_count) {
- __clk_prepare(parent);
- clk_enable(parent);
- clk_enable(clk);
+ clk_core_prepare(parent);
+ clk_core_enable(parent);
+ clk_core_enable(clk);
}

/* update the clk tree topology */
@@ -1222,25 +1328,27 @@ static struct clk *__clk_set_parent_before(struct clk *clk, struct clk *parent)
return old_parent;
}

-static void __clk_set_parent_after(struct clk *clk, struct clk *parent,
- struct clk *old_parent)
+static void __clk_set_parent_after(struct clk_core *core,
+ struct clk_core *parent,
+ struct clk_core *old_parent)
{
/*
* Finish the migration of prepare state and undo the changes done
* for preventing a race with clk_enable().
*/
- if (clk->prepare_count) {
- clk_disable(clk);
- clk_disable(old_parent);
- __clk_unprepare(old_parent);
+ if (core->prepare_count) {
+ clk_core_disable(core);
+ clk_core_disable(old_parent);
+ clk_core_unprepare(old_parent);
}
}

-static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index)
+static int __clk_set_parent(struct clk_core *clk, struct clk_core *parent,
+ u8 p_index)
{
unsigned long flags;
int ret = 0;
- struct clk *old_parent;
+ struct clk_core *old_parent;

old_parent = __clk_set_parent_before(clk, parent);

@@ -1254,9 +1362,9 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index)
clk_enable_unlock(flags);

if (clk->prepare_count) {
- clk_disable(clk);
- clk_disable(parent);
- __clk_unprepare(parent);
+ clk_core_disable(clk);
+ clk_core_disable(parent);
+ clk_core_unprepare(parent);
}
return ret;
}
@@ -1282,9 +1390,10 @@ static int __clk_set_parent(struct clk *clk, struct clk *parent, u8 p_index)
*
* Caller must hold prepare_lock.
*/
-static int __clk_speculate_rates(struct clk *clk, unsigned long parent_rate)
+static int __clk_speculate_rates(struct clk_core *clk,
+ unsigned long parent_rate)
{
- struct clk *child;
+ struct clk_core *child;
unsigned long new_rate;
int ret = NOTIFY_DONE;

@@ -1310,10 +1419,10 @@ out:
return ret;
}

-static void clk_calc_subtree(struct clk *clk, unsigned long new_rate,
- struct clk *new_parent, u8 p_index)
+static void clk_calc_subtree(struct clk_core *clk, unsigned long new_rate,
+ struct clk_core *new_parent, u8 p_index)
{
- struct clk *child;
+ struct clk_core *child;

clk->new_rate = new_rate;
clk->new_parent = new_parent;
@@ -1333,10 +1442,11 @@ static void clk_calc_subtree(struct clk *clk, unsigned long new_rate,
* calculate the new rates returning the topmost clock that has to be
* changed.
*/
-static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
+static struct clk_core *clk_calc_new_rates(struct clk_core *clk,
+ unsigned long rate)
{
- struct clk *top = clk;
- struct clk *old_parent, *parent;
+ struct clk_core *top = clk;
+ struct clk_core *old_parent, *parent;
struct clk_hw *parent_hw;
unsigned long best_parent_rate = 0;
unsigned long new_rate;
@@ -1357,7 +1467,7 @@ static struct clk *clk_calc_new_rates(struct clk *clk, unsigned long rate)
new_rate = clk->ops->determine_rate(clk->hw, rate,
&best_parent_rate,
&parent_hw);
- parent = parent_hw->clk;
+ parent = parent_hw ? parent_hw->core : NULL;
} else if (clk->ops->round_rate) {
new_rate = clk->ops->round_rate(clk->hw, rate,
&best_parent_rate);
@@ -1405,9 +1515,10 @@ out:
* so that in case of an error we can walk down the whole tree again and
* abort the change.
*/
-static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long event)
+static struct clk_core *clk_propagate_rate_change(struct clk_core *clk,
+ unsigned long event)
{
- struct clk *child, *tmp_clk, *fail_clk = NULL;
+ struct clk_core *child, *tmp_clk, *fail_clk = NULL;
int ret = NOTIFY_DONE;

if (clk->rate == clk->new_rate)
@@ -1442,14 +1553,14 @@ static struct clk *clk_propagate_rate_change(struct clk *clk, unsigned long even
* walk down a subtree and set the new rates notifying the rate
* change on the way
*/
-static void clk_change_rate(struct clk *clk)
+static void clk_change_rate(struct clk_core *clk)
{
- struct clk *child;
+ struct clk_core *child;
struct hlist_node *tmp;
unsigned long old_rate;
unsigned long best_parent_rate = 0;
bool skip_set_rate = false;
- struct clk *old_parent;
+ struct clk_core *old_parent;

old_rate = clk->rate;

@@ -1520,7 +1631,7 @@ static void clk_change_rate(struct clk *clk)
*/
int clk_set_rate(struct clk *clk, unsigned long rate)
{
- struct clk *top, *fail_clk;
+ struct clk_core *top, *fail_clk;
int ret = 0;

if (!clk)
@@ -1533,13 +1644,14 @@ int clk_set_rate(struct clk *clk, unsigned long rate)
if (rate == clk_get_rate(clk))
goto out;

- if ((clk->flags & CLK_SET_RATE_GATE) && clk->prepare_count) {
+ if ((clk->core->flags & CLK_SET_RATE_GATE) &&
+ clk->core->prepare_count) {
ret = -EBUSY;
goto out;
}

/* calculate new rates and get the topmost changed clock */
- top = clk_calc_new_rates(clk, rate);
+ top = clk_calc_new_rates(clk->core, rate);
if (!top) {
ret = -EINVAL;
goto out;
@@ -1590,11 +1702,11 @@ EXPORT_SYMBOL_GPL(clk_get_parent);
*
* For single-parent clocks without .get_parent, first check to see if the
* .parents array exists, and if so use it to avoid an expensive tree
- * traversal. If .parents does not exist then walk the tree with __clk_lookup.
+ * traversal. If .parents does not exist then walk the tree.
*/
-static struct clk *__clk_init_parent(struct clk *clk)
+static struct clk_core *__clk_init_parent(struct clk_core *clk)
{
- struct clk *ret = NULL;
+ struct clk_core *ret = NULL;
u8 index;

/* handle the trivial cases */
@@ -1604,7 +1716,7 @@ static struct clk *__clk_init_parent(struct clk *clk)

if (clk->num_parents == 1) {
if (IS_ERR_OR_NULL(clk->parent))
- clk->parent = __clk_lookup(clk->parent_names[0]);
+ clk->parent = clk_core_lookup(clk->parent_names[0]);
ret = clk->parent;
goto out;
}
@@ -1618,8 +1730,8 @@ static struct clk *__clk_init_parent(struct clk *clk)

/*
* Do our best to cache parent clocks in clk->parents. This prevents
- * unnecessary and expensive calls to __clk_lookup. We don't set
- * clk->parent here; that is done by the calling function
+ * unnecessary and expensive lookups. We don't set clk->parent here;
+ * that is done by the calling function.
*/

index = clk->ops->get_parent(clk->hw);
@@ -1629,37 +1741,26 @@ static struct clk *__clk_init_parent(struct clk *clk)
kcalloc(clk->num_parents, sizeof(struct clk *),
GFP_KERNEL);

- ret = clk_get_parent_by_index(clk, index);
+ ret = clk_core_get_parent_by_index(clk, index);

out:
return ret;
}

-void __clk_reparent(struct clk *clk, struct clk *new_parent)
+static void clk_core_reparent(struct clk_core *clk,
+ struct clk_core *new_parent)
{
clk_reparent(clk, new_parent);
__clk_recalc_accuracies(clk);
__clk_recalc_rates(clk, POST_RATE_CHANGE);
}

-/**
- * clk_set_parent - switch the parent of a mux clk
- * @clk: the mux clk whose input we are switching
- * @parent: the new input to clk
- *
- * Re-parent clk to use parent as its new input source. If clk is in
- * prepared state, the clk will get enabled for the duration of this call. If
- * that's not acceptable for a specific clk (Eg: the consumer can't handle
- * that, the reparenting is glitchy in hardware, etc), use the
- * CLK_SET_PARENT_GATE flag to allow reparenting only when clk is unprepared.
- *
- * After successfully changing clk's parent clk_set_parent will update the
- * clk topology, sysfs topology and propagate rate recalculation via
- * __clk_recalc_rates.
- *
- * Returns 0 on success, -EERROR otherwise.
- */
-int clk_set_parent(struct clk *clk, struct clk *parent)
+void __clk_reparent(struct clk *clk, struct clk *new_parent)
+{
+ clk_core_reparent(clk->core, new_parent->core);
+}
+
+static int clk_core_set_parent(struct clk_core *clk, struct clk_core *parent)
{
int ret = 0;
int p_index = 0;
@@ -1719,6 +1820,28 @@ out:

return ret;
}
+
+/**
+ * clk_set_parent - switch the parent of a mux clk
+ * @clk: the mux clk whose input we are switching
+ * @parent: the new input to clk
+ *
+ * Re-parent clk to use parent as its new input source. If clk is in
+ * prepared state, the clk will get enabled for the duration of this call. If
+ * that's not acceptable for a specific clk (Eg: the consumer can't handle
+ * that, the reparenting is glitchy in hardware, etc), use the
+ * CLK_SET_PARENT_GATE flag to allow reparenting only when clk is unprepared.
+ *
+ * After successfully changing clk's parent clk_set_parent will update the
+ * clk topology, sysfs topology and propagate rate recalculation via
+ * __clk_recalc_rates.
+ *
+ * Returns 0 on success, -EERROR otherwise.
+ */
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ return clk_core_set_parent(clk->core, parent->core);
+}
EXPORT_SYMBOL_GPL(clk_set_parent);

/**
@@ -1755,13 +1878,13 @@ int clk_set_phase(struct clk *clk, int degrees)

clk_prepare_lock();

- if (!clk->ops->set_phase)
+ if (!clk->core->ops->set_phase)
goto out_unlock;

- ret = clk->ops->set_phase(clk->hw, degrees);
+ ret = clk->core->ops->set_phase(clk->core->hw, degrees);

if (!ret)
- clk->phase = degrees;
+ clk->core->phase = degrees;

out_unlock:
clk_prepare_unlock();
@@ -1770,14 +1893,7 @@ out:
return ret;
}

-/**
- * clk_get_phase - return the phase shift of a clock signal
- * @clk: clock signal source
- *
- * Returns the phase shift of a clock node in degrees, otherwise returns
- * -EERROR.
- */
-int clk_get_phase(struct clk *clk)
+static int clk_core_get_phase(struct clk_core *clk)
{
int ret = 0;

@@ -1793,18 +1909,31 @@ out:
}

/**
+ * clk_get_phase - return the phase shift of a clock signal
+ * @clk: clock signal source
+ *
+ * Returns the phase shift of a clock node in degrees, otherwise returns
+ * -EERROR.
+ */
+int clk_get_phase(struct clk *clk)
+{
+ return clk_core_get_phase(clk->core);
+}
+
+/**
* __clk_init - initialize the data structures in a struct clk
* @dev: device initializing this clk, placeholder for now
* @clk: clk being initialized
*
- * Initializes the lists in struct clk, queries the hardware for the
+ * Initializes the lists in struct clk_core, queries the hardware for the
* parent and rate and sets them both.
*/
-int __clk_init(struct device *dev, struct clk *clk)
+int __clk_init(struct device *dev, struct clk *clk_user)
{
int i, ret = 0;
- struct clk *orphan;
+ struct clk_core *orphan;
struct hlist_node *tmp2;
+ struct clk_core *clk = clk_user->core;

if (!clk)
return -EINVAL;
@@ -1812,7 +1941,7 @@ int __clk_init(struct device *dev, struct clk *clk)
clk_prepare_lock();

/* check to see if a clock with this name is already registered */
- if (__clk_lookup(clk->name)) {
+ if (clk_core_lookup(clk->name)) {
pr_debug("%s: clk %s already initialized\n",
__func__, clk->name);
ret = -EEXIST;
@@ -1864,7 +1993,7 @@ int __clk_init(struct device *dev, struct clk *clk)
clk->parents = kcalloc(clk->num_parents, sizeof(struct clk *),
GFP_KERNEL);
/*
- * __clk_lookup returns NULL for parents that have not been
+ * clk_core_lookup returns NULL for parents that have not been
* clk_init'd; thus any access to clk->parents[] must check
* for a NULL pointer. We can always perform lazy lookups for
* missing parents later on.
@@ -1872,7 +2001,7 @@ int __clk_init(struct device *dev, struct clk *clk)
if (clk->parents)
for (i = 0; i < clk->num_parents; i++)
clk->parents[i] =
- __clk_lookup(clk->parent_names[i]);
+ clk_core_lookup(clk->parent_names[i]);
}

clk->parent = __clk_init_parent(clk);
@@ -1928,7 +2057,7 @@ int __clk_init(struct device *dev, struct clk *clk)
*/
if (clk->ops->recalc_rate)
clk->rate = clk->ops->recalc_rate(clk->hw,
- __clk_get_rate(clk->parent));
+ clk_core_get_rate_nolock(clk->parent));
else if (clk->parent)
clk->rate = clk->parent->rate;
else
@@ -1942,13 +2071,13 @@ int __clk_init(struct device *dev, struct clk *clk)
if (orphan->num_parents && orphan->ops->get_parent) {
i = orphan->ops->get_parent(orphan->hw);
if (!strcmp(clk->name, orphan->parent_names[i]))
- __clk_reparent(orphan, clk);
+ clk_core_reparent(orphan, clk);
continue;
}

for (i = 0; i < orphan->num_parents; i++)
if (!strcmp(clk->name, orphan->parent_names[i])) {
- __clk_reparent(orphan, clk);
+ clk_core_reparent(orphan, clk);
break;
}
}
@@ -1977,12 +2106,13 @@ out:
/**
* __clk_register - register a clock and return a cookie.
*
- * Same as clk_register, except that the .clk field inside hw shall point to a
- * preallocated (generally statically allocated) struct clk. None of the fields
- * of the struct clk need to be initialized.
+ * Same as clk_register, except that the .core and .clk fields inside hw shall
+ * point to preallocated (generally statically allocated) struct clk_core, and
+ * struct clk (respectively). None of the fields of the struct clk_core need
+ * to be initialized.
*
- * The data pointed to by .init and .clk field shall NOT be marked as init
- * data.
+ * The data pointed to by .init, .core and .clk field shall NOT be marked as
+ * init data.
*
* __clk_register is only exposed via clk-private.h and is intended for use with
* very large numbers of clocks that need to be statically initialized. It is
@@ -1994,9 +2124,9 @@ out:
struct clk *__clk_register(struct device *dev, struct clk_hw *hw)
{
int ret;
- struct clk *clk;
+ struct clk_core *clk;

- clk = hw->clk;
+ clk = hw->core;
clk->name = hw->init->name;
clk->ops = hw->init->ops;
clk->hw = hw;
@@ -2008,11 +2138,11 @@ struct clk *__clk_register(struct device *dev, struct clk_hw *hw)
else
clk->owner = NULL;

- ret = __clk_init(dev, clk);
+ ret = __clk_init(dev, hw->clk);
if (ret)
return ERR_PTR(ret);

- return clk;
+ return hw->clk;
}
EXPORT_SYMBOL_GPL(__clk_register);

@@ -2030,7 +2160,7 @@ EXPORT_SYMBOL_GPL(__clk_register);
struct clk *clk_register(struct device *dev, struct clk_hw *hw)
{
int i, ret;
- struct clk *clk;
+ struct clk_core *clk;

clk = kzalloc(sizeof(*clk), GFP_KERNEL);
if (!clk) {
@@ -2051,7 +2181,7 @@ struct clk *clk_register(struct device *dev, struct clk_hw *hw)
clk->hw = hw;
clk->flags = hw->init->flags;
clk->num_parents = hw->init->num_parents;
- hw->clk = clk;
+ hw->core = clk;

/* allocate local copy in case parent_names is __initdata */
clk->parent_names = kcalloc(clk->num_parents, sizeof(char *),
@@ -2075,10 +2205,12 @@ struct clk *clk_register(struct device *dev, struct clk_hw *hw)
}
}

- ret = __clk_init(dev, clk);
+ hw->clk = __clk_create_clk(hw, NULL, NULL);
+ ret = __clk_init(dev, hw->clk);
if (!ret)
- return clk;
+ return hw->clk;

+ kfree(hw->clk);
fail_parent_names_copy:
while (--i >= 0)
kfree(clk->parent_names[i]);
@@ -2098,7 +2230,7 @@ EXPORT_SYMBOL_GPL(clk_register);
*/
static void __clk_release(struct kref *ref)
{
- struct clk *clk = container_of(ref, struct clk, ref);
+ struct clk_core *clk = container_of(ref, struct clk_core, ref);
int i = clk->num_parents;

kfree(clk->parents);
@@ -2156,12 +2288,12 @@ void clk_unregister(struct clk *clk)
if (!clk || WARN_ON_ONCE(IS_ERR(clk)))
return;

- clk_debug_unregister(clk);
+ clk_debug_unregister(clk->core);

clk_prepare_lock();

- if (clk->ops == &clk_nodrv_ops) {
- pr_err("%s: unregistered clock: %s\n", __func__, clk->name);
+ if (clk->core->ops == &clk_nodrv_ops) {
+ pr_err("%s: unregistered clock: %s\n", __func__, clk->core->name);
return;
}
/*
@@ -2169,24 +2301,24 @@ void clk_unregister(struct clk *clk)
* a reference to this clock.
*/
flags = clk_enable_lock();
- clk->ops = &clk_nodrv_ops;
+ clk->core->ops = &clk_nodrv_ops;
clk_enable_unlock(flags);

- if (!hlist_empty(&clk->children)) {
- struct clk *child;
+ if (!hlist_empty(&clk->core->children)) {
+ struct clk_core *child;
struct hlist_node *t;

/* Reparent all children to the orphan list. */
- hlist_for_each_entry_safe(child, t, &clk->children, child_node)
- clk_set_parent(child, NULL);
+ hlist_for_each_entry_safe(child, t, &clk->core->children, child_node)
+ clk_core_set_parent(child, NULL);
}

- hlist_del_init(&clk->child_node);
+ hlist_del_init(&clk->core->child_node);

- if (clk->prepare_count)
+ if (clk->core->prepare_count)
pr_warn("%s: unregistering prepared clock: %s\n",
- __func__, clk->name);
- kref_put(&clk->ref, __clk_release);
+ __func__, clk->core->name);
+ kref_put(&clk->core->ref, __clk_release);

clk_prepare_unlock();
}
@@ -2254,30 +2386,39 @@ EXPORT_SYMBOL_GPL(devm_clk_unregister);
*/
int __clk_get(struct clk *clk)
{
- if (clk) {
- if (!try_module_get(clk->owner))
+ struct clk_core *core = !clk ? NULL : clk->core;
+
+ if (core) {
+ if (!try_module_get(core->owner))
return 0;

- kref_get(&clk->ref);
+ kref_get(&core->ref);
}
return 1;
}

-void __clk_put(struct clk *clk)
+static void clk_core_put(struct clk_core *core)
{
struct module *owner;

- if (!clk || WARN_ON_ONCE(IS_ERR(clk)))
- return;
+ owner = core->owner;

clk_prepare_lock();
- owner = clk->owner;
- kref_put(&clk->ref, __clk_release);
+ kref_put(&core->ref, __clk_release);
clk_prepare_unlock();

module_put(owner);
}

+void __clk_put(struct clk *clk)
+{
+ if (!clk || WARN_ON_ONCE(IS_ERR(clk)))
+ return;
+
+ clk_core_put(clk->core);
+ kfree(clk);
+}
+
/*** clk rate change notifiers ***/

/**
@@ -2330,7 +2471,7 @@ int clk_notifier_register(struct clk *clk, struct notifier_block *nb)

ret = srcu_notifier_chain_register(&cn->notifier_head, nb);

- clk->notifier_count++;
+ clk->core->notifier_count++;

out:
clk_prepare_unlock();
@@ -2367,7 +2508,7 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb)
if (cn->clk == clk) {
ret = srcu_notifier_chain_unregister(&cn->notifier_head, nb);

- clk->notifier_count--;
+ clk->core->notifier_count--;

/* XXX the notifier code should handle this better */
if (!cn->notifier_head.head) {
@@ -2386,6 +2527,26 @@ int clk_notifier_unregister(struct clk *clk, struct notifier_block *nb)
}
EXPORT_SYMBOL_GPL(clk_notifier_unregister);

+struct clk *__clk_create_clk(struct clk_hw *hw, const char *dev_id,
+ const char *con_id)
+{
+ struct clk *clk;
+
+ /* This is to allow this function to be chained to others */
+ if (!hw || IS_ERR(hw))
+ return (struct clk *) hw;
+
+ clk = kzalloc(sizeof(*clk), GFP_KERNEL);
+ if (!clk)
+ return ERR_PTR(-ENOMEM);
+
+ clk->core = hw->core;
+ clk->dev_id = dev_id;
+ clk->con_id = con_id;
+
+ return clk;
+}
+
#ifdef CONFIG_OF
/**
* struct of_clk_provider - Clock provider registration structure
diff --git a/drivers/clk/clk.h b/drivers/clk/clk.h
index c798138..23c44e5 100644
--- a/drivers/clk/clk.h
+++ b/drivers/clk/clk.h
@@ -9,9 +9,14 @@
* published by the Free Software Foundation.
*/

+struct clk_hw;
+
#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
struct clk *of_clk_get_by_clkspec(struct of_phandle_args *clkspec);
struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec);
void of_clk_lock(void);
void of_clk_unlock(void);
#endif
+
+struct clk *__clk_create_clk(struct clk_hw *hw, const char *dev_id,
+ const char *con_id);
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index da4bda8..fac3244 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -19,6 +19,7 @@
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
+#include <linux/clk-provider.h>
#include <linux/of.h>

#include "clk.h"
@@ -53,7 +54,7 @@ struct clk *of_clk_get_by_clkspec(struct of_phandle_args *clkspec)
return clk;
}

-struct clk *of_clk_get(struct device_node *np, int index)
+static struct clk *__of_clk_get(struct device_node *np, int index)
{
struct of_phandle_args clkspec;
struct clk *clk;
@@ -69,20 +70,22 @@ struct clk *of_clk_get(struct device_node *np, int index)

clk = of_clk_get_by_clkspec(&clkspec);
of_node_put(clkspec.np);
+
+ return clk;
+}
+
+struct clk *of_clk_get(struct device_node *np, int index)
+{
+ struct clk *clk = __of_clk_get(np, index);
+
+ if (!IS_ERR(clk))
+ clk = __clk_create_clk(__clk_get_hw(clk), np->full_name, NULL);
+
return clk;
}
EXPORT_SYMBOL(of_clk_get);

-/**
- * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node
- * @np: pointer to clock consumer node
- * @name: name of consumer's clock input, or NULL for the first clock reference
- *
- * This function parses the clocks and clock-names properties,
- * and uses them to look up the struct clk from the registered list of clock
- * providers.
- */
-struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
+static struct clk *__of_clk_get_by_name(struct device_node *np, const char *name)
{
struct clk *clk = ERR_PTR(-ENOENT);

@@ -97,7 +100,7 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
*/
if (name)
index = of_property_match_string(np, "clock-names", name);
- clk = of_clk_get(np, index);
+ clk = __of_clk_get(np, index);
if (!IS_ERR(clk))
break;
else if (name && index >= 0) {
@@ -119,7 +122,33 @@ struct clk *of_clk_get_by_name(struct device_node *np, const char *name)

return clk;
}
+
+/**
+ * of_clk_get_by_name() - Parse and lookup a clock referenced by a device node
+ * @np: pointer to clock consumer node
+ * @name: name of consumer's clock input, or NULL for the first clock reference
+ *
+ * This function parses the clocks and clock-names properties,
+ * and uses them to look up the struct clk from the registered list of clock
+ * providers.
+ */
+struct clk *of_clk_get_by_name(struct device_node *np, const char *name)
+{
+ struct clk *clk = __of_clk_get_by_name(np, name);
+
+ if (!IS_ERR(clk))
+ clk = __clk_create_clk(__clk_get_hw(clk), np->full_name, name);
+
+ return clk;
+}
EXPORT_SYMBOL(of_clk_get_by_name);
+
+#else /* defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK) */
+
+static struct clk *__of_clk_get_by_name(struct device_node *np, const char *name)
+{
+ return ERR_PTR(-ENOENT);
+}
#endif

/*
@@ -168,14 +197,29 @@ static struct clk_lookup *clk_find(const char *dev_id, const char *con_id)
struct clk *clk_get_sys(const char *dev_id, const char *con_id)
{
struct clk_lookup *cl;
+ struct clk *clk = NULL;

mutex_lock(&clocks_mutex);
+
cl = clk_find(dev_id, con_id);
- if (cl && !__clk_get(cl->clk))
+ if (!cl)
+ goto out;
+
+ if (!__clk_get(cl->clk)) {
cl = NULL;
+ goto out;
+ }
+
+#if defined(CONFIG_COMMON_CLK)
+ clk = __clk_create_clk(__clk_get_hw(cl->clk), dev_id, con_id);
+#else
+ clk = cl->clk;
+#endif
+
+out:
mutex_unlock(&clocks_mutex);

- return cl ? cl->clk : ERR_PTR(-ENOENT);
+ return cl ? clk : ERR_PTR(-ENOENT);
}
EXPORT_SYMBOL(clk_get_sys);

@@ -185,9 +229,13 @@ struct clk *clk_get(struct device *dev, const char *con_id)
struct clk *clk;

if (dev) {
- clk = of_clk_get_by_name(dev->of_node, con_id);
- if (!IS_ERR(clk))
+ clk = __of_clk_get_by_name(dev->of_node, con_id);
+ if (!IS_ERR(clk)) {
+#if defined(CONFIG_COMMON_CLK)
+ clk = __clk_create_clk(__clk_get_hw(clk), dev_id, con_id);
+#endif
return clk;
+ }
if (PTR_ERR(clk) == -EPROBE_DEFER)
return clk;
}
diff --git a/include/linux/clk-private.h b/include/linux/clk-private.h
index 0ca5f60..1cdb727 100644
--- a/include/linux/clk-private.h
+++ b/include/linux/clk-private.h
@@ -28,20 +28,20 @@

struct module;

-struct clk {
+struct clk_core {
const char *name;
const struct clk_ops *ops;
struct clk_hw *hw;
struct module *owner;
- struct clk *parent;
+ struct clk_core *parent;
const char **parent_names;
- struct clk **parents;
+ struct clk_core **parents;
u8 num_parents;
u8 new_parent_index;
unsigned long rate;
unsigned long new_rate;
- struct clk *new_parent;
- struct clk *new_child;
+ struct clk_core *new_parent;
+ struct clk_core *new_child;
unsigned long flags;
unsigned int enable_count;
unsigned int prepare_count;
@@ -57,6 +57,12 @@ struct clk {
struct kref ref;
};

+struct clk {
+ struct clk_core *core;
+ const char *dev_id;
+ const char *con_id;
+};
+
/*
* DOC: Basic clock implementations common to many platforms
*
@@ -69,6 +75,9 @@ struct clk {
#define DEFINE_CLK(_name, _ops, _flags, _parent_names, \
_parents) \
static struct clk _name = { \
+ .core = &_name##_core \
+ }; \
+ static struct clk_core _name##_core = { \
.name = #_name, \
.ops = &_ops, \
.hw = &_name##_hw.hw, \
@@ -81,9 +90,11 @@ struct clk {
#define DEFINE_CLK_FIXED_RATE(_name, _flags, _rate, \
_fixed_rate_flags) \
static struct clk _name; \
+ static struct clk_core _name##_core; \
static const char *_name##_parent_names[] = {}; \
static struct clk_fixed_rate _name##_hw = { \
.hw = { \
+ .core = &_name##_core, \
.clk = &_name, \
}, \
.fixed_rate = _rate, \
@@ -96,14 +107,16 @@ struct clk {
_flags, _reg, _bit_idx, \
_gate_flags, _lock) \
static struct clk _name; \
+ static struct clk_core _name##_core; \
static const char *_name##_parent_names[] = { \
_parent_name, \
}; \
- static struct clk *_name##_parents[] = { \
+ static struct clk_core *_name##_parents[] = { \
_parent_ptr, \
}; \
static struct clk_gate _name##_hw = { \
.hw = { \
+ .core = &_name##_core, \
.clk = &_name, \
}, \
.reg = _reg, \
@@ -118,14 +131,16 @@ struct clk {
_flags, _reg, _shift, _width, \
_divider_flags, _table, _lock) \
static struct clk _name; \
+ static struct clk_core _name##_core; \
static const char *_name##_parent_names[] = { \
_parent_name, \
}; \
- static struct clk *_name##_parents[] = { \
+ static struct clk_core *_name##_parents[] = { \
_parent_ptr, \
}; \
static struct clk_divider _name##_hw = { \
.hw = { \
+ .core = &_name##_core, \
.clk = &_name, \
}, \
.reg = _reg, \
@@ -157,8 +172,10 @@ struct clk {
_reg, _shift, _width, \
_mux_flags, _lock) \
static struct clk _name; \
+ static struct clk_core _name##_core; \
static struct clk_mux _name##_hw = { \
.hw = { \
+ .core = &_name##_core, \
.clk = &_name, \
}, \
.reg = _reg, \
@@ -174,14 +191,16 @@ struct clk {
_parent_ptr, _flags, \
_mult, _div) \
static struct clk _name; \
+ static struct clk_core _name##_core; \
static const char *_name##_parent_names[] = { \
_parent_name, \
}; \
- static struct clk *_name##_parents[] = { \
+ static struct clk_core *_name##_parents[] = { \
_parent_ptr, \
}; \
static struct clk_fixed_factor _name##_hw = { \
.hw = { \
+ .core = &_name##_core, \
.clk = &_name, \
}, \
.mult = _mult, \
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index d936409..5065172 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -33,6 +33,7 @@
#define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */

struct clk_hw;
+struct clk_core;
struct dentry;

/**
@@ -216,13 +217,17 @@ struct clk_init_data {
* clk_foo and then referenced by the struct clk instance that uses struct
* clk_foo's clk_ops
*
- * @clk: pointer to the struct clk instance that points back to this struct
- * clk_hw instance
+ * @core: pointer to the struct clk_core instance that points back to this
+ * struct clk_hw instance
+ *
+ * @clk: pointer to the per-user struct clk instance that can be used to call
+ * into the clk API
*
* @init: pointer to struct clk_init_data that contains the init data shared
* with the common clock framework.
*/
struct clk_hw {
+ struct clk_core *core;
struct clk *clk;
const struct clk_init_data *init;
};
@@ -556,8 +561,6 @@ long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
/*
* FIXME clock api without lock protection
*/
-int __clk_prepare(struct clk *clk);
-void __clk_unprepare(struct clk *clk);
void __clk_reparent(struct clk *clk, struct clk *new_parent);
unsigned long __clk_round_rate(struct clk *clk, unsigned long rate);

--
1.9.3


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