[PATCH v2 3/5] clk: meson: g12a: add support for SM1 DynamIQ Shared Unit clock

[Neil Armstrong <narmstrong@baylibre.com>]

The Amlogic SM1 DynamIQ Shared Unit has a dedicated clock tree similar to the
CPU clock tree with a supplementaty mux to select the CPU0 clock instead.

Leave this as read-only since it's set up by the early boot stages.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
---
 drivers/clk/meson/g12a.c | 184 +++++++++++++++++++++++++++++++++++++++
 drivers/clk/meson/g12a.h |  15 +++-
 2 files changed, 198 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/meson/g12a.c b/drivers/clk/meson/g12a.c
index 34dfac4b4dc6..e00df17f800a 100644
--- a/drivers/clk/meson/g12a.c
+++ b/drivers/clk/meson/g12a.c
@@ -676,6 +676,172 @@ static struct clk_regmap g12b_cpub_clk = {
 	},
 };
 
+static struct clk_regmap sm1_gp1_pll;
+
+/* Datasheet names this field as "premux0" */
+static struct clk_regmap sm1_dsu_clk_premux0 = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.mask = 0x3,
+		.shift = 0,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_dyn0_sel",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_data = (const struct clk_parent_data []) {
+			{ .fw_name = "xtal", },
+			{ .hw = &g12a_fclk_div2.hw },
+			{ .hw = &g12a_fclk_div3.hw },
+			{ .hw = &sm1_gp1_pll.hw },
+		},
+		.num_parents = 4,
+	},
+};
+
+/* Datasheet names this field as "premux1" */
+static struct clk_regmap sm1_dsu_clk_premux1 = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.mask = 0x3,
+		.shift = 16,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_dyn1_sel",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_data = (const struct clk_parent_data []) {
+			{ .fw_name = "xtal", },
+			{ .hw = &g12a_fclk_div2.hw },
+			{ .hw = &g12a_fclk_div3.hw },
+			{ .hw = &sm1_gp1_pll.hw },
+		},
+		.num_parents = 4,
+	},
+};
+
+/* Datasheet names this field as "Mux0_divn_tcnt" */
+static struct clk_regmap sm1_dsu_clk_mux0_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.shift = 4,
+		.width = 6,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_dyn0_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&sm1_dsu_clk_premux0.hw
+		},
+		.num_parents = 1,
+	},
+};
+
+/* Datasheet names this field as "postmux0" */
+static struct clk_regmap sm1_dsu_clk_postmux0 = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.mask = 0x1,
+		.shift = 2,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_dyn0",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&sm1_dsu_clk_premux0.hw,
+			&sm1_dsu_clk_mux0_div.hw,
+		},
+		.num_parents = 2,
+	},
+};
+
+/* Datasheet names this field as "Mux1_divn_tcnt" */
+static struct clk_regmap sm1_dsu_clk_mux1_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.shift = 20,
+		.width = 6,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_dyn1_div",
+		.ops = &clk_regmap_divider_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&sm1_dsu_clk_premux1.hw
+		},
+		.num_parents = 1,
+	},
+};
+
+/* Datasheet names this field as "postmux1" */
+static struct clk_regmap sm1_dsu_clk_postmux1 = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.mask = 0x1,
+		.shift = 18,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_dyn1",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&sm1_dsu_clk_premux1.hw,
+			&sm1_dsu_clk_mux1_div.hw,
+		},
+		.num_parents = 2,
+	},
+};
+
+/* Datasheet names this field as "Final_dyn_mux_sel" */
+static struct clk_regmap sm1_dsu_clk_dyn = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.mask = 0x1,
+		.shift = 10,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_dyn",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&sm1_dsu_clk_postmux0.hw,
+			&sm1_dsu_clk_postmux1.hw,
+		},
+		.num_parents = 2,
+	},
+};
+
+/* Datasheet names this field as "Final_mux_sel" */
+static struct clk_regmap sm1_dsu_final_clk = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL5,
+		.mask = 0x1,
+		.shift = 11,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk_final",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&sm1_dsu_clk_dyn.hw,
+			&g12a_sys_pll.hw,
+		},
+		.num_parents = 2,
+	},
+};
+
+/* Datasheet names this field as "Cpu_clk_sync_mux_sel" bit 4 */
+static struct clk_regmap sm1_dsu_clk = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_SYS_CPU_CLK_CNTL6,
+		.mask = 0x1,
+		.shift = 27,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "dsu_clk",
+		.ops = &clk_regmap_mux_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&g12a_cpu_clk.hw,
+			&sm1_dsu_final_clk.hw,
+		},
+		.num_parents = 2,
+	},
+};
+
 static int g12a_cpu_clk_mux_notifier_cb(struct notifier_block *nb,
 					unsigned long event, void *data)
 {
@@ -4401,6 +4567,15 @@ static struct clk_hw_onecell_data sm1_hw_onecell_data = {
 		[CLKID_TS]			= &g12a_ts.hw,
 		[CLKID_GP1_PLL_DCO]		= &sm1_gp1_pll_dco.hw,
 		[CLKID_GP1_PLL]			= &sm1_gp1_pll.hw,
+		[CLKID_DSU_CLK_DYN0_SEL]	= &sm1_dsu_clk_premux0.hw,
+		[CLKID_DSU_CLK_DYN0_DIV]	= &sm1_dsu_clk_premux1.hw,
+		[CLKID_DSU_CLK_DYN0]		= &sm1_dsu_clk_mux0_div.hw,
+		[CLKID_DSU_CLK_DYN1_SEL]	= &sm1_dsu_clk_postmux0.hw,
+		[CLKID_DSU_CLK_DYN1_DIV]	= &sm1_dsu_clk_mux1_div.hw,
+		[CLKID_DSU_CLK_DYN1]		= &sm1_dsu_clk_postmux1.hw,
+		[CLKID_DSU_CLK_DYN]		= &sm1_dsu_clk_dyn.hw,
+		[CLKID_DSU_CLK_FINAL]		= &sm1_dsu_final_clk.hw,
+		[CLKID_DSU_CLK]			= &sm1_dsu_clk.hw,
 		[NR_CLKS]			= NULL,
 	},
 	.num = NR_CLKS,
@@ -4623,6 +4798,15 @@ static struct clk_regmap *const g12a_clk_regmaps[] = {
 	&g12b_cpub_clk_trace,
 	&sm1_gp1_pll_dco,
 	&sm1_gp1_pll,
+	&sm1_dsu_clk_premux0,
+	&sm1_dsu_clk_premux1,
+	&sm1_dsu_clk_mux0_div,
+	&sm1_dsu_clk_postmux0,
+	&sm1_dsu_clk_mux1_div,
+	&sm1_dsu_clk_postmux1,
+	&sm1_dsu_clk_dyn,
+	&sm1_dsu_final_clk,
+	&sm1_dsu_clk,
 };
 
 static const struct reg_sequence g12a_init_regs[] = {
diff --git a/drivers/clk/meson/g12a.h b/drivers/clk/meson/g12a.h
index e426b4121b7a..6804fcced6b5 100644
--- a/drivers/clk/meson/g12a.h
+++ b/drivers/clk/meson/g12a.h
@@ -80,6 +80,11 @@
 #define HHI_SYS_CPUB_CLK_CNTL1		0x200
 #define HHI_SYS_CPUB_CLK_CNTL		0x208
 #define HHI_VPU_CLKB_CNTL		0x20C
+#define HHI_SYS_CPU_CLK_CNTL2		0x210
+#define HHI_SYS_CPU_CLK_CNTL3		0x214
+#define HHI_SYS_CPU_CLK_CNTL4		0x218
+#define HHI_SYS_CPU_CLK_CNTL5		0x21c
+#define HHI_SYS_CPU_CLK_CNTL6		0x220
 #define HHI_GEN_CLK_CNTL		0x228
 #define HHI_VDIN_MEAS_CLK_CNTL		0x250
 #define HHI_MIPIDSI_PHY_CLK_CNTL	0x254
@@ -242,8 +247,16 @@
 #define CLKID_CPUB_CLK_TRACE_SEL		240
 #define CLKID_CPUB_CLK_TRACE			241
 #define CLKID_GP1_PLL_DCO			242
+#define CLKID_DSU_CLK_DYN0_SEL			244
+#define CLKID_DSU_CLK_DYN0_DIV			245
+#define CLKID_DSU_CLK_DYN0			246
+#define CLKID_DSU_CLK_DYN1_SEL			247
+#define CLKID_DSU_CLK_DYN1_DIV			248
+#define CLKID_DSU_CLK_DYN1			249
+#define CLKID_DSU_CLK_DYN			250
+#define CLKID_DSU_CLK_FINAL			251
 
-#define NR_CLKS					244
+#define NR_CLKS					253
 
 /* include the CLKIDs that have been made part of the DT binding */
 #include <dt-bindings/clock/g12a-clkc.h>
-- 
2.22.0