clk: meson: clk-pll: remove od parameters

Remove od parameters from pll clocks and add post dividers clocks
instead. Some clock, especially the one which feature several ods,
may provide output between those ods. Also, some drivers, such
as the hdmi driver, may require a more detailed control of the
clock dividers, compared to what CCF would perform automatically.

One added benefit of removing ods is that it also greatly reduce the
size of the rate parameter tables.

In the future, we could possibly take the predivider 'n' out of this
driver as well. To do so, we will need to understand the constraints
for the PLL to lock and whether or not it depends on the input clock
rate.

Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

1 files changed, 154 insertions, 130 deletions

diff --git a/drivers/clk/meson/axg.c b/drivers/clk/meson/axg.c
index 991fa511c05a..a5e4f7b22f39 100644
--- a/drivers/clk/meson/axg.c
+++ b/drivers/clk/meson/axg.c
@@ -22,7 +22,7 @@
 
 static DEFINE_SPINLOCK(meson_clk_lock);
 
-static struct clk_regmap axg_fixed_pll = {
+static struct clk_regmap axg_fixed_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_MPLL_CNTL,
@@ -39,11 +39,6 @@ static struct clk_regmap axg_fixed_pll = {
 			.shift   = 9,
 			.width   = 5,
 		},
-		.od = {
-			.reg_off = HHI_MPLL_CNTL,
-			.shift   = 16,
-			.width   = 2,
-		},
 		.frac = {
 			.reg_off = HHI_MPLL_CNTL2,
 			.shift   = 0,
@@ -61,14 +56,33 @@ static struct clk_regmap axg_fixed_pll = {
 		},
 	},
 	.hw.init = &(struct clk_init_data){
-		.name = "fixed_pll",
+		.name = "fixed_pll_dco",
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
 	},
 };
 
-static struct clk_regmap axg_sys_pll = {
+static struct clk_regmap axg_fixed_pll = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_MPLL_CNTL,
+		.shift = 16,
+		.width = 2,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "fixed_pll",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "fixed_pll_dco" },
+		.num_parents = 1,
+		/*
+		 * This clock won't ever change at runtime so
+		 * CLK_SET_RATE_PARENT is not required
+		 */
+	},
+};
+
+static struct clk_regmap axg_sys_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_SYS_PLL_CNTL,
@@ -85,11 +99,6 @@ static struct clk_regmap axg_sys_pll = {
 			.shift   = 9,
 			.width   = 5,
 		},
-		.od = {
-			.reg_off = HHI_SYS_PLL_CNTL,
-			.shift   = 16,
-			.width   = 2,
-		},
 		.l = {
 			.reg_off = HHI_SYS_PLL_CNTL,
 			.shift   = 31,
@@ -102,101 +111,59 @@ static struct clk_regmap axg_sys_pll = {
 		},
 	},
 	.hw.init = &(struct clk_init_data){
-		.name = "sys_pll",
+		.name = "sys_pll_dco",
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
 	},
 };
 
+static struct clk_regmap axg_sys_pll = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_PLL_CNTL,
+		.shift = 16,
+		.width = 2,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "sys_pll",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "sys_pll_dco" },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
 static const struct pll_rate_table axg_gp0_pll_rate_table[] = {
-	PLL_RATE(240000000, 40, 1, 2),
-	PLL_RATE(246000000, 41, 1, 2),
-	PLL_RATE(252000000, 42, 1, 2),
-	PLL_RATE(258000000, 43, 1, 2),
-	PLL_RATE(264000000, 44, 1, 2),
-	PLL_RATE(270000000, 45, 1, 2),
-	PLL_RATE(276000000, 46, 1, 2),
-	PLL_RATE(282000000, 47, 1, 2),
-	PLL_RATE(288000000, 48, 1, 2),
-	PLL_RATE(294000000, 49, 1, 2),
-	PLL_RATE(300000000, 50, 1, 2),
-	PLL_RATE(306000000, 51, 1, 2),
-	PLL_RATE(312000000, 52, 1, 2),
-	PLL_RATE(318000000, 53, 1, 2),
-	PLL_RATE(324000000, 54, 1, 2),
-	PLL_RATE(330000000, 55, 1, 2),
-	PLL_RATE(336000000, 56, 1, 2),
-	PLL_RATE(342000000, 57, 1, 2),
-	PLL_RATE(348000000, 58, 1, 2),
-	PLL_RATE(354000000, 59, 1, 2),
-	PLL_RATE(360000000, 60, 1, 2),
-	PLL_RATE(366000000, 61, 1, 2),
-	PLL_RATE(372000000, 62, 1, 2),
-	PLL_RATE(378000000, 63, 1, 2),
-	PLL_RATE(384000000, 64, 1, 2),
-	PLL_RATE(390000000, 65, 1, 3),
-	PLL_RATE(396000000, 66, 1, 3),
-	PLL_RATE(402000000, 67, 1, 3),
-	PLL_RATE(408000000, 68, 1, 3),
-	PLL_RATE(480000000, 40, 1, 1),
-	PLL_RATE(492000000, 41, 1, 1),
-	PLL_RATE(504000000, 42, 1, 1),
-	PLL_RATE(516000000, 43, 1, 1),
-	PLL_RATE(528000000, 44, 1, 1),
-	PLL_RATE(540000000, 45, 1, 1),
-	PLL_RATE(552000000, 46, 1, 1),
-	PLL_RATE(564000000, 47, 1, 1),
-	PLL_RATE(576000000, 48, 1, 1),
-	PLL_RATE(588000000, 49, 1, 1),
-	PLL_RATE(600000000, 50, 1, 1),
-	PLL_RATE(612000000, 51, 1, 1),
-	PLL_RATE(624000000, 52, 1, 1),
-	PLL_RATE(636000000, 53, 1, 1),
-	PLL_RATE(648000000, 54, 1, 1),
-	PLL_RATE(660000000, 55, 1, 1),
-	PLL_RATE(672000000, 56, 1, 1),
-	PLL_RATE(684000000, 57, 1, 1),
-	PLL_RATE(696000000, 58, 1, 1),
-	PLL_RATE(708000000, 59, 1, 1),
-	PLL_RATE(720000000, 60, 1, 1),
-	PLL_RATE(732000000, 61, 1, 1),
-	PLL_RATE(744000000, 62, 1, 1),
-	PLL_RATE(756000000, 63, 1, 1),
-	PLL_RATE(768000000, 64, 1, 1),
-	PLL_RATE(780000000, 65, 1, 1),
-	PLL_RATE(792000000, 66, 1, 1),
-	PLL_RATE(804000000, 67, 1, 1),
-	PLL_RATE(816000000, 68, 1, 1),
-	PLL_RATE(960000000, 40, 1, 0),
-	PLL_RATE(984000000, 41, 1, 0),
-	PLL_RATE(1008000000, 42, 1, 0),
-	PLL_RATE(1032000000, 43, 1, 0),
-	PLL_RATE(1056000000, 44, 1, 0),
-	PLL_RATE(1080000000, 45, 1, 0),
-	PLL_RATE(1104000000, 46, 1, 0),
-	PLL_RATE(1128000000, 47, 1, 0),
-	PLL_RATE(1152000000, 48, 1, 0),
-	PLL_RATE(1176000000, 49, 1, 0),
-	PLL_RATE(1200000000, 50, 1, 0),
-	PLL_RATE(1224000000, 51, 1, 0),
-	PLL_RATE(1248000000, 52, 1, 0),
-	PLL_RATE(1272000000, 53, 1, 0),
-	PLL_RATE(1296000000, 54, 1, 0),
-	PLL_RATE(1320000000, 55, 1, 0),
-	PLL_RATE(1344000000, 56, 1, 0),
-	PLL_RATE(1368000000, 57, 1, 0),
-	PLL_RATE(1392000000, 58, 1, 0),
-	PLL_RATE(1416000000, 59, 1, 0),
-	PLL_RATE(1440000000, 60, 1, 0),
-	PLL_RATE(1464000000, 61, 1, 0),
-	PLL_RATE(1488000000, 62, 1, 0),
-	PLL_RATE(1512000000, 63, 1, 0),
-	PLL_RATE(1536000000, 64, 1, 0),
-	PLL_RATE(1560000000, 65, 1, 0),
-	PLL_RATE(1584000000, 66, 1, 0),
-	PLL_RATE(1608000000, 67, 1, 0),
-	PLL_RATE(1632000000, 68, 1, 0),
+	PLL_RATE(960000000, 40, 1),
+	PLL_RATE(984000000, 41, 1),
+	PLL_RATE(1008000000, 42, 1),
+	PLL_RATE(1032000000, 43, 1),
+	PLL_RATE(1056000000, 44, 1),
+	PLL_RATE(1080000000, 45, 1),
+	PLL_RATE(1104000000, 46, 1),
+	PLL_RATE(1128000000, 47, 1),
+	PLL_RATE(1152000000, 48, 1),
+	PLL_RATE(1176000000, 49, 1),
+	PLL_RATE(1200000000, 50, 1),
+	PLL_RATE(1224000000, 51, 1),
+	PLL_RATE(1248000000, 52, 1),
+	PLL_RATE(1272000000, 53, 1),
+	PLL_RATE(1296000000, 54, 1),
+	PLL_RATE(1320000000, 55, 1),
+	PLL_RATE(1344000000, 56, 1),
+	PLL_RATE(1368000000, 57, 1),
+	PLL_RATE(1392000000, 58, 1),
+	PLL_RATE(1416000000, 59, 1),
+	PLL_RATE(1440000000, 60, 1),
+	PLL_RATE(1464000000, 61, 1),
+	PLL_RATE(1488000000, 62, 1),
+	PLL_RATE(1512000000, 63, 1),
+	PLL_RATE(1536000000, 64, 1),
+	PLL_RATE(1560000000, 65, 1),
+	PLL_RATE(1584000000, 66, 1),
+	PLL_RATE(1608000000, 67, 1),
+	PLL_RATE(1632000000, 68, 1),
 	{ /* sentinel */ },
 };
 
@@ -208,7 +175,7 @@ static const struct reg_sequence axg_gp0_init_regs[] = {
 	{ .reg = HHI_GP0_PLL_CNTL5,	.def = 0x00078000 },
 };
 
-static struct clk_regmap axg_gp0_pll = {
+static struct clk_regmap axg_gp0_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_GP0_PLL_CNTL,
@@ -225,11 +192,6 @@ static struct clk_regmap axg_gp0_pll = {
 			.shift   = 9,
 			.width   = 5,
 		},
-		.od = {
-			.reg_off = HHI_GP0_PLL_CNTL,
-			.shift   = 16,
-			.width   = 2,
-		},
 		.frac = {
 			.reg_off = HHI_GP0_PLL_CNTL1,
 			.shift   = 0,
@@ -250,13 +212,29 @@ static struct clk_regmap axg_gp0_pll = {
 		.init_count = ARRAY_SIZE(axg_gp0_init_regs),
 	},
 	.hw.init = &(struct clk_init_data){
-		.name = "gp0_pll",
+		.name = "gp0_pll_dco",
 		.ops = &meson_clk_pll_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
 	},
 };
 
+static struct clk_regmap axg_gp0_pll = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_GP0_PLL_CNTL,
+		.shift = 16,
+		.width = 2,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "gp0_pll",
+		.ops = &clk_regmap_divider_ops,
+		.parent_names = (const char *[]){ "gp0_pll_dco" },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
 static const struct reg_sequence axg_hifi_init_regs[] = {
 	{ .reg = HHI_HIFI_PLL_CNTL1,	.def = 0xc084b000 },
 	{ .reg = HHI_HIFI_PLL_CNTL2,	.def = 0xb75020be },
@@ -265,7 +243,7 @@ static const struct reg_sequence axg_hifi_init_regs[] = {
 	{ .reg = HHI_HIFI_PLL_CNTL5,	.def = 0x00058000 },
 };
 
-static struct clk_regmap axg_hifi_pll = {
+static struct clk_regmap axg_hifi_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_HIFI_PLL_CNTL,
@@ -282,11 +260,6 @@ static struct clk_regmap axg_hifi_pll = {
 			.shift   = 9,
 			.width   = 5,
 		},
-		.od = {
-			.reg_off = HHI_HIFI_PLL_CNTL,
-			.shift   = 16,
-			.width   = 2,
-		},
 		.frac = {
 			.reg_off = HHI_HIFI_PLL_CNTL5,
 			.shift   = 0,
@@ -308,13 +281,29 @@ static struct clk_regmap axg_hifi_pll = {
 		.flags = CLK_MESON_PLL_ROUND_CLOSEST,
 	},
 	.hw.init = &(struct clk_init_data){
-		.name = "hifi_pll",
+		.name = "hifi_pll_dco",
 		.ops = &meson_clk_pll_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
 	},
 };
 
+static struct clk_regmap axg_hifi_pll = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_HIFI_PLL_CNTL,
+		.shift = 16,
+		.width = 2,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "hifi_pll",
+		.ops = &clk_regmap_divider_ops,
+		.parent_names = (const char *[]){ "hifi_pll_dco" },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
 static struct clk_fixed_factor axg_fclk_div2_div = {
 	.mult = 1,
 	.div = 2,
@@ -644,11 +633,9 @@ static struct clk_regmap axg_mpll3 = {
 
 static const struct pll_rate_table axg_pcie_pll_rate_table[] = {
 	{
-		.rate	= 100000000,
+		.rate	= 1600000000,
 		.m	= 200,
 		.n	= 3,
-		.od	= 1,
-		.od2	= 3,
 	},
 	{ /* sentinel */ },
 };
@@ -660,9 +647,10 @@ static const struct reg_sequence axg_pcie_init_regs[] = {
 	{ .reg = HHI_PCIE_PLL_CNTL4,	.def = 0xc000004d },
 	{ .reg = HHI_PCIE_PLL_CNTL5,	.def = 0x00078000 },
 	{ .reg = HHI_PCIE_PLL_CNTL6,	.def = 0x002323c6 },
+	{ .reg = HHI_PCIE_PLL_CNTL,     .def = 0x400106c8 },
 };
 
-static struct clk_regmap axg_pcie_pll = {
+static struct clk_regmap axg_pcie_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_PCIE_PLL_CNTL,
@@ -679,16 +667,6 @@ static struct clk_regmap axg_pcie_pll = {
 			.shift   = 9,
 			.width   = 5,
 		},
-		.od = {
-			.reg_off = HHI_PCIE_PLL_CNTL,
-			.shift   = 16,
-			.width   = 2,
-		},
-		.od2 = {
-			.reg_off = HHI_PCIE_PLL_CNTL6,
-			.shift   = 6,
-			.width   = 2,
-		},
 		.frac = {
 			.reg_off = HHI_PCIE_PLL_CNTL1,
 			.shift   = 0,
@@ -709,13 +687,45 @@ static struct clk_regmap axg_pcie_pll = {
 		.init_count = ARRAY_SIZE(axg_pcie_init_regs),
 	},
 	.hw.init = &(struct clk_init_data){
-		.name = "pcie_pll",
+		.name = "pcie_pll_dco",
 		.ops = &meson_clk_pll_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
 	},
 };
 
+static struct clk_regmap axg_pcie_pll_od = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_PCIE_PLL_CNTL,
+		.shift = 16,
+		.width = 2,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "pcie_pll_od",
+		.ops = &clk_regmap_divider_ops,
+		.parent_names = (const char *[]){ "pcie_pll_dco" },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
+static struct clk_regmap axg_pcie_pll = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_PCIE_PLL_CNTL6,
+		.shift = 6,
+		.width = 2,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "pcie_pll",
+		.ops = &clk_regmap_divider_ops,
+		.parent_names = (const char *[]){ "pcie_pll_od" },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
 static struct clk_regmap axg_pcie_mux = {
 	.data = &(struct clk_regmap_mux_data){
 		.offset = HHI_PCIE_PLL_CNTL6,
@@ -1128,6 +1138,12 @@ static struct clk_hw_onecell_data axg_hw_onecell_data = {
 		[CLKID_GEN_CLK_SEL]		= &axg_gen_clk_sel.hw,
 		[CLKID_GEN_CLK_DIV]		= &axg_gen_clk_div.hw,
 		[CLKID_GEN_CLK]			= &axg_gen_clk.hw,
+		[CLKID_SYS_PLL_DCO]		= &axg_sys_pll_dco.hw,
+		[CLKID_FIXED_PLL_DCO]		= &axg_fixed_pll_dco.hw,
+		[CLKID_GP0_PLL_DCO]		= &axg_gp0_pll_dco.hw,
+		[CLKID_HIFI_PLL_DCO]		= &axg_hifi_pll_dco.hw,
+		[CLKID_PCIE_PLL_DCO]		= &axg_pcie_pll_dco.hw,
+		[CLKID_PCIE_PLL_OD]		= &axg_pcie_pll_od.hw,
 		[NR_CLKS]			= NULL,
 	},
 	.num = NR_CLKS,
@@ -1206,6 +1222,8 @@ static struct clk_regmap *const axg_clk_regmaps[] = {
 	&axg_fclk_div4,
 	&axg_fclk_div5,
 	&axg_fclk_div7,
+	&axg_pcie_pll_dco,
+	&axg_pcie_pll_od,
 	&axg_pcie_pll,
 	&axg_pcie_mux,
 	&axg_pcie_ref,
@@ -1215,6 +1233,12 @@ static struct clk_regmap *const axg_clk_regmaps[] = {
 	&axg_gen_clk_sel,
 	&axg_gen_clk_div,
 	&axg_gen_clk,
+	&axg_fixed_pll_dco,
+	&axg_sys_pll_dco,
+	&axg_gp0_pll_dco,
+	&axg_hifi_pll_dco,
+	&axg_pcie_pll_dco,
+	&axg_pcie_pll_od,
 };
 
 static const struct of_device_id clkc_match_table[] = {