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, 78 insertions, 73 deletions

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index ec1f97725b9f..4c061c1d3683 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -30,58 +30,21 @@ struct meson8b_clk_reset {
 };
 
 static const struct pll_rate_table sys_pll_rate_table[] = {
-	PLL_RATE(312000000, 52, 1, 2),
-	PLL_RATE(336000000, 56, 1, 2),
-	PLL_RATE(360000000, 60, 1, 2),
-	PLL_RATE(384000000, 64, 1, 2),
-	PLL_RATE(408000000, 68, 1, 2),
-	PLL_RATE(432000000, 72, 1, 2),
-	PLL_RATE(456000000, 76, 1, 2),
-	PLL_RATE(480000000, 80, 1, 2),
-	PLL_RATE(504000000, 84, 1, 2),
-	PLL_RATE(528000000, 88, 1, 2),
-	PLL_RATE(552000000, 92, 1, 2),
-	PLL_RATE(576000000, 96, 1, 2),
-	PLL_RATE(600000000, 50, 1, 1),
-	PLL_RATE(624000000, 52, 1, 1),
-	PLL_RATE(648000000, 54, 1, 1),
-	PLL_RATE(672000000, 56, 1, 1),
-	PLL_RATE(696000000, 58, 1, 1),
-	PLL_RATE(720000000, 60, 1, 1),
-	PLL_RATE(744000000, 62, 1, 1),
-	PLL_RATE(768000000, 64, 1, 1),
-	PLL_RATE(792000000, 66, 1, 1),
-	PLL_RATE(816000000, 68, 1, 1),
-	PLL_RATE(840000000, 70, 1, 1),
-	PLL_RATE(864000000, 72, 1, 1),
-	PLL_RATE(888000000, 74, 1, 1),
-	PLL_RATE(912000000, 76, 1, 1),
-	PLL_RATE(936000000, 78, 1, 1),
-	PLL_RATE(960000000, 80, 1, 1),
-	PLL_RATE(984000000, 82, 1, 1),
-	PLL_RATE(1008000000, 84, 1, 1),
-	PLL_RATE(1032000000, 86, 1, 1),
-	PLL_RATE(1056000000, 88, 1, 1),
-	PLL_RATE(1080000000, 90, 1, 1),
-	PLL_RATE(1104000000, 92, 1, 1),
-	PLL_RATE(1128000000, 94, 1, 1),
-	PLL_RATE(1152000000, 96, 1, 1),
-	PLL_RATE(1176000000, 98, 1, 1),
-	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(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),
 	{ /* sentinel */ },
 };
 
@@ -94,7 +57,7 @@ static struct clk_fixed_rate meson8b_xtal = {
 	},
 };
 
-static struct clk_regmap meson8b_fixed_pll = {
+static struct clk_regmap meson8b_fixed_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_MPLL_CNTL,
@@ -111,11 +74,6 @@ static struct clk_regmap meson8b_fixed_pll = {
 			.shift   = 9,
 			.width   = 5,
 		},
-		.od = {
-			.reg_off = HHI_MPLL_CNTL,
-			.shift   = 16,
-			.width   = 2,
-		},
 		.frac = {
 			.reg_off = HHI_MPLL_CNTL2,
 			.shift   = 0,
@@ -133,14 +91,33 @@ static struct clk_regmap meson8b_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 meson8b_vid_pll = {
+static struct clk_regmap meson8b_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 meson8b_vid_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_VID_PLL_CNTL,
@@ -157,11 +134,6 @@ static struct clk_regmap meson8b_vid_pll = {
 			.shift   = 9,
 			.width   = 5,
 		},
-		.od = {
-			.reg_off = HHI_VID_PLL_CNTL,
-			.shift   = 16,
-			.width   = 2,
-		},
 		.l = {
 			.reg_off = HHI_VID_PLL_CNTL,
 			.shift   = 31,
@@ -174,14 +146,30 @@ static struct clk_regmap meson8b_vid_pll = {
 		},
 	},
 	.hw.init = &(struct clk_init_data){
-		.name = "vid_pll",
+		.name = "vid_pll_dco",
 		.ops = &meson_clk_pll_ro_ops,
 		.parent_names = (const char *[]){ "xtal" },
 		.num_parents = 1,
 	},
 };
 
-static struct clk_regmap meson8b_sys_pll = {
+static struct clk_regmap meson8b_vid_pll = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_VID_PLL_CNTL,
+		.shift = 16,
+		.width = 2,
+		.flags = CLK_DIVIDER_POWER_OF_TWO,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "vid_pll",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_names = (const char *[]){ "vid_pll_dco" },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
+static struct clk_regmap meson8b_sys_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
 			.reg_off = HHI_SYS_PLL_CNTL,
@@ -198,11 +186,6 @@ static struct clk_regmap meson8b_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,
@@ -216,13 +199,29 @@ static struct clk_regmap meson8b_sys_pll = {
 		.table = sys_pll_rate_table,
 	},
 	.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 meson8b_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 struct clk_fixed_factor meson8b_fclk_div2_div = {
 	.mult = 1,
 	.div = 2,
@@ -891,6 +890,9 @@ static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
 		[CLKID_NAND_SEL]	    = &meson8b_nand_clk_sel.hw,
 		[CLKID_NAND_DIV]	    = &meson8b_nand_clk_div.hw,
 		[CLKID_NAND_CLK]	    = &meson8b_nand_clk_gate.hw,
+		[CLKID_PLL_FIXED_DCO]	    = &meson8b_fixed_pll_dco.hw,
+		[CLKID_PLL_VID_DCO]	    = &meson8b_vid_pll_dco.hw,
+		[CLKID_PLL_SYS_DCO]	    = &meson8b_sys_pll_dco.hw,
 		[CLK_NR_CLKS]		    = NULL,
 	},
 	.num = CLK_NR_CLKS,
@@ -999,6 +1001,9 @@ static struct clk_regmap *const meson8b_clk_regmaps[] = {
 	&meson8b_nand_clk_sel,
 	&meson8b_nand_clk_div,
 	&meson8b_nand_clk_gate,
+	&meson8b_fixed_pll_dco,
+	&meson8b_vid_pll_dco,
+	&meson8b_sys_pll_dco,
 };
 
 static const struct meson8b_clk_reset_line {