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Subject[PATCH v2 3/4] clk: meson: meson8b: add support for the GP_PLL clock on Meson8m2
Date
Meson8m2 has a GP_PLL clock (similar to GP0_PLL on GXBB/GXL/GXM) which
is used as input for the VPU clocks.
The only supported frequency (based on Amlogic's vendor kernel sources)
is 364MHz which is achieved using the following parameters:
- input: XTAL (24MHz)
- M = 182
- N = 3
- OD = 2 ^ 2

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
drivers/clk/meson/meson8b.c | 62 +++++++++++++++++++++++++++++++++++++
drivers/clk/meson/meson8b.h | 5 ++-
2 files changed, 66 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index c9e6ec67d649..0d08f1ef7af8 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -1703,6 +1703,64 @@ static struct clk_regmap meson8b_mali = {
},
};

+static const struct pll_params_table meson8m2_gp_pll_params_table[] = {
+ PLL_PARAMS(182, 3),
+ { /* sentinel */ },
+};
+
+static struct clk_regmap meson8m2_gp_pll_dco = {
+ .data = &(struct meson_clk_pll_data){
+ .en = {
+ .reg_off = HHI_GP_PLL_CNTL,
+ .shift = 30,
+ .width = 1,
+ },
+ .m = {
+ .reg_off = HHI_GP_PLL_CNTL,
+ .shift = 0,
+ .width = 9,
+ },
+ .n = {
+ .reg_off = HHI_GP_PLL_CNTL,
+ .shift = 9,
+ .width = 5,
+ },
+ .l = {
+ .reg_off = HHI_GP_PLL_CNTL,
+ .shift = 31,
+ .width = 1,
+ },
+ .rst = {
+ .reg_off = HHI_GP_PLL_CNTL,
+ .shift = 29,
+ .width = 1,
+ },
+ .table = meson8m2_gp_pll_params_table,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "gp_pll_dco",
+ .ops = &meson_clk_pll_ops,
+ .parent_names = (const char *[]){ "xtal" },
+ .num_parents = 1,
+ },
+};
+
+static struct clk_regmap meson8m2_gp_pll = {
+ .data = &(struct clk_regmap_div_data){
+ .offset = HHI_GP_PLL_CNTL,
+ .shift = 16,
+ .width = 2,
+ .flags = CLK_DIVIDER_POWER_OF_TWO,
+ },
+ .hw.init = &(struct clk_init_data){
+ .name = "gp_pll",
+ .ops = &clk_regmap_divider_ops,
+ .parent_names = (const char *[]){ "gp_pll_dco" },
+ .num_parents = 1,
+ .flags = CLK_SET_RATE_PARENT,
+ },
+};
+
/* Everything Else (EE) domain gates */

static MESON_GATE(meson8b_ddr, HHI_GCLK_MPEG0, 0);
@@ -2338,6 +2396,8 @@ static struct clk_hw_onecell_data meson8m2_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_GP_PLL_DCO] = &meson8m2_gp_pll_dco.hw,
+ [CLKID_GP_PLL] = &meson8m2_gp_pll.hw,
[CLK_NR_CLKS] = NULL,
},
.num = CLK_NR_CLKS,
@@ -2500,6 +2560,8 @@ static struct clk_regmap *const meson8b_clk_regmaps[] = {
&meson8b_mali_1_div,
&meson8b_mali_1,
&meson8b_mali,
+ &meson8m2_gp_pll_dco,
+ &meson8m2_gp_pll,
};

static const struct meson8b_clk_reset_line {
diff --git a/drivers/clk/meson/meson8b.h b/drivers/clk/meson/meson8b.h
index b8c58faeae52..a45f7102c558 100644
--- a/drivers/clk/meson/meson8b.h
+++ b/drivers/clk/meson/meson8b.h
@@ -19,6 +19,7 @@
*
* [0] http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf
*/
+#define HHI_GP_PLL_CNTL 0x40 /* 0x10 offset in data sheet */
#define HHI_VIID_CLK_DIV 0x128 /* 0x4a offset in data sheet */
#define HHI_VIID_CLK_CNTL 0x12c /* 0x4b offset in data sheet */
#define HHI_GCLK_MPEG0 0x140 /* 0x50 offset in data sheet */
@@ -146,8 +147,10 @@
#define CLKID_MALI_1_SEL 178
#define CLKID_MALI_1_DIV 179
#define CLKID_MALI_1 180
+#define CLKID_GP_PLL_DCO 181
+#define CLKID_GP_PLL 182

-#define CLK_NR_CLKS 181
+#define CLK_NR_CLKS 183

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