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Subject[PATCH v2 4/4] clk: meson: meson8b: add the VPU clock trees
Date
The VPU clock tree is slightly different on all three supported SoCs:

Meson8 only has an input mux (which chooses between "fclk_div4",
"fclk_div3", "fclk_div5" and "fclk_div7"), a divider and a gate.

Meson8b has two VPU clock trees, each with an input mux (using the same
parents as the input mux on Meson8), divider and a gates. The final VPU
clock is a glitch-free mux which chooses between VPU_1 and VPU_2.

Meson8m2 uses a similar clock tree as Meson8b but the last input clock
is different: instead of using "fclk_div7" as input Meson8m2 uses
"gp_pll". This was probably done in hardware to improve the accuracy of
the clock because fclk_div7 gives us 2550MHz / 7 = 364.286MHz while
GP_PLL can achieve 364.0MHz.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/clk/meson/meson8b.c | 167 ++++++++++++++++++++++++++++++++++++
drivers/clk/meson/meson8b.h | 9 +-
2 files changed, 175 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 0d08f1ef7af8..8e091c2d10e6 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -1761,6 +1761,147 @@ static struct clk_regmap meson8m2_gp_pll = {
},
};

+static const char * const mmeson8b_vpu_0_1_parent_names[] = {
+ "fclk_div4", "fclk_div3", "fclk_div5", "fclk_div7"
+};
+
+static const char * const mmeson8m2_vpu_0_1_parent_names[] = {
+ "fclk_div4", "fclk_div3", "fclk_div5", "gp_pll"
+};
+
+static struct clk_regmap meson8b_vpu_0_sel = {
+ .data = &(struct clk_regmap_mux_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .mask = 0x3,
+ .shift = 9,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "vpu_0_sel",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = mmeson8b_vpu_0_1_parent_names,
+ .num_parents = ARRAY_SIZE(mmeson8b_vpu_0_1_parent_names),
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8m2_vpu_0_sel = {
+ .data = &(struct clk_regmap_mux_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .mask = 0x3,
+ .shift = 9,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "vpu_0_sel",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = mmeson8m2_vpu_0_1_parent_names,
+ .num_parents = ARRAY_SIZE(mmeson8m2_vpu_0_1_parent_names),
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8b_vpu_0_div = {
+ .data = &(struct clk_regmap_div_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .shift = 0,
+ .width = 7,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "vpu_0_div",
+ .ops = &clk_regmap_divider_ops,
+ .parent_names = (const char *[]){ "vpu_0_sel" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8b_vpu_0 = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .bit_idx = 8,
+ },
+ .hw.init = &(struct clk_init_data) {
+ .name = "vpu_0",
+ .ops = &clk_regmap_gate_ops,
+ .parent_names = (const char *[]){ "vpu_0_div" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8b_vpu_1_sel = {
+ .data = &(struct clk_regmap_mux_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .mask = 0x3,
+ .shift = 25,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "vpu_1_sel",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = mmeson8b_vpu_0_1_parent_names,
+ .num_parents = ARRAY_SIZE(mmeson8b_vpu_0_1_parent_names),
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8m2_vpu_1_sel = {
+ .data = &(struct clk_regmap_mux_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .mask = 0x3,
+ .shift = 25,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "vpu_1_sel",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = mmeson8m2_vpu_0_1_parent_names,
+ .num_parents = ARRAY_SIZE(mmeson8m2_vpu_0_1_parent_names),
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8b_vpu_1_div = {
+ .data = &(struct clk_regmap_div_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .shift = 16,
+ .width = 7,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "vpu_1_div",
+ .ops = &clk_regmap_divider_ops,
+ .parent_names = (const char *[]){ "vpu_1_sel" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8b_vpu_1 = {
+ .data = &(struct clk_regmap_gate_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .bit_idx = 24,
+ },
+ .hw.init = &(struct clk_init_data) {
+ .name = "vpu_1",
+ .ops = &clk_regmap_gate_ops,
+ .parent_names = (const char *[]){ "vpu_1_div" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
+static struct clk_regmap meson8b_vpu = {
+ .data = &(struct clk_regmap_mux_data){
+ .offset = HHI_VPU_CLK_CNTL,
+ .mask = 1,
+ .shift = 31,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "vpu",
+ .ops = &clk_regmap_mux_ops,
+ .parent_names = (const char *[]){ "vpu_0", "vpu_1" },
+ .num_parents = 2,
+ .flags = CLK_SET_RATE_NO_REPARENT,
+ },
+};
+
/* Everything Else (EE) domain gates */

static MESON_GATE(meson8b_ddr, HHI_GCLK_MPEG0, 0);
@@ -2024,6 +2165,9 @@ static struct clk_hw_onecell_data meson8_hw_onecell_data = {
[CLKID_MALI_0_SEL] = &meson8b_mali_0_sel.hw,
[CLKID_MALI_0_DIV] = &meson8b_mali_0_div.hw,
[CLKID_MALI] = &meson8b_mali_0.hw,
+ [CLKID_VPU_0_SEL] = &meson8b_vpu_0_sel.hw,
+ [CLKID_VPU_0_DIV] = &meson8b_vpu_0_div.hw,
+ [CLKID_VPU] = &meson8b_vpu_0.hw,
[CLK_NR_CLKS] = NULL,
},
.num = CLK_NR_CLKS,
@@ -2210,6 +2354,13 @@ static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
[CLKID_MALI_1_DIV] = &meson8b_mali_1_div.hw,
[CLKID_MALI_1] = &meson8b_mali_1.hw,
[CLKID_MALI] = &meson8b_mali.hw,
+ [CLKID_VPU_0_SEL] = &meson8b_vpu_0_sel.hw,
+ [CLKID_VPU_0_DIV] = &meson8b_vpu_0_div.hw,
+ [CLKID_VPU_0] = &meson8b_vpu_0.hw,
+ [CLKID_VPU_1_SEL] = &meson8b_vpu_1_sel.hw,
+ [CLKID_VPU_1_DIV] = &meson8b_vpu_1_div.hw,
+ [CLKID_VPU_1] = &meson8b_vpu_1.hw,
+ [CLKID_VPU] = &meson8b_vpu.hw,
[CLK_NR_CLKS] = NULL,
},
.num = CLK_NR_CLKS,
@@ -2398,6 +2549,13 @@ static struct clk_hw_onecell_data meson8m2_hw_onecell_data = {
[CLKID_MALI] = &meson8b_mali.hw,
[CLKID_GP_PLL_DCO] = &meson8m2_gp_pll_dco.hw,
[CLKID_GP_PLL] = &meson8m2_gp_pll.hw,
+ [CLKID_VPU_0_SEL] = &meson8m2_vpu_0_sel.hw,
+ [CLKID_VPU_0_DIV] = &meson8b_vpu_0_div.hw,
+ [CLKID_VPU_0] = &meson8b_vpu_0.hw,
+ [CLKID_VPU_1_SEL] = &meson8m2_vpu_1_sel.hw,
+ [CLKID_VPU_1_DIV] = &meson8b_vpu_1_div.hw,
+ [CLKID_VPU_1] = &meson8b_vpu_1.hw,
+ [CLKID_VPU] = &meson8b_vpu.hw,
[CLK_NR_CLKS] = NULL,
},
.num = CLK_NR_CLKS,
@@ -2562,6 +2720,15 @@ static struct clk_regmap *const meson8b_clk_regmaps[] = {
&meson8b_mali,
&meson8m2_gp_pll_dco,
&meson8m2_gp_pll,
+ &meson8b_vpu_0_sel,
+ &meson8m2_vpu_0_sel,
+ &meson8b_vpu_0_div,
+ &meson8b_vpu_0,
+ &meson8b_vpu_1_sel,
+ &meson8m2_vpu_1_sel,
+ &meson8b_vpu_1_div,
+ &meson8b_vpu_1,
+ &meson8b_vpu,
};

static const struct meson8b_clk_reset_line {
diff --git a/drivers/clk/meson/meson8b.h b/drivers/clk/meson/meson8b.h
index a45f7102c558..e775f91ccce9 100644
--- a/drivers/clk/meson/meson8b.h
+++ b/drivers/clk/meson/meson8b.h
@@ -35,6 +35,7 @@
#define HHI_VID_DIVIDER_CNTL 0x198 /* 0x66 offset in data sheet */
#define HHI_SYS_CPU_CLK_CNTL0 0x19c /* 0x67 offset in data sheet */
#define HHI_MALI_CLK_CNTL 0x1b0 /* 0x6c offset in data sheet */
+#define HHI_VPU_CLK_CNTL 0x1bc /* 0x6f offset in data sheet */
#define HHI_HDMI_CLK_CNTL 0x1cc /* 0x73 offset in data sheet */
#define HHI_NAND_CLK_CNTL 0x25c /* 0x97 offset in data sheet */
#define HHI_MPLL_CNTL 0x280 /* 0xa0 offset in data sheet */
@@ -149,8 +150,14 @@
#define CLKID_MALI_1 180
#define CLKID_GP_PLL_DCO 181
#define CLKID_GP_PLL 182
+#define CLKID_VPU_0_SEL 183
+#define CLKID_VPU_0_DIV 184
+#define CLKID_VPU_0 185
+#define CLKID_VPU_1_SEL 186
+#define CLKID_VPU_1_DIV 187
+#define CLKID_VPU_1 189

-#define CLK_NR_CLKS 183
+#define CLK_NR_CLKS 191

/*
* include the CLKID and RESETID that have
--
2.21.0
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