clk: meson: axg: add MIPI DSI Host clock

This adds the MIPI DSI Host clock, used to measure the signal timings
(ENC VSYNC or DW-MIPI-DSI eDPI timings).
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200915124553.8056-5-narmstrong@baylibre.com

drivers/clk/meson/axg.c

@@ -1703,6 +1703,66 @@ static struct clk_regmap axg_cts_encl = {
 	},
 };
 
+/* MIPI DSI Host Clock */
+
+static u32 mux_table_axg_vdin_meas[]    = { 0, 1, 2, 3, 6, 7 };
+static const struct clk_parent_data axg_vdin_meas_parent_data[] = {
+	{ .fw_name = "xtal", },
+	{ .hw = &axg_fclk_div4.hw },
+	{ .hw = &axg_fclk_div3.hw },
+	{ .hw = &axg_fclk_div5.hw },
+	{ .hw = &axg_fclk_div2.hw },
+	{ .hw = &axg_fclk_div7.hw },
+};
+
+static struct clk_regmap axg_vdin_meas_sel = {
+	.data = &(struct clk_regmap_mux_data){
+		.offset = HHI_VDIN_MEAS_CLK_CNTL,
+		.mask = 0x7,
+		.shift = 21,
+		.flags = CLK_MUX_ROUND_CLOSEST,
+		.table = mux_table_axg_vdin_meas,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "vdin_meas_sel",
+		.ops = &clk_regmap_mux_ops,
+		.parent_data = axg_vdin_meas_parent_data,
+		.num_parents = ARRAY_SIZE(axg_vdin_meas_parent_data),
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
+static struct clk_regmap axg_vdin_meas_div = {
+	.data = &(struct clk_regmap_div_data){
+		.offset = HHI_VDIN_MEAS_CLK_CNTL,
+		.shift = 12,
+		.width = 7,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "vdin_meas_div",
+		.ops = &clk_regmap_divider_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&axg_vdin_meas_sel.hw },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
+static struct clk_regmap axg_vdin_meas = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_VDIN_MEAS_CLK_CNTL,
+		.bit_idx = 20,
+	},
+	.hw.init = &(struct clk_init_data) {
+		.name = "vdin_meas",
+		.ops = &clk_regmap_gate_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&axg_vdin_meas_div.hw },
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
 static u32 mux_table_gen_clk[]	= { 0, 4, 5, 6, 7, 8,
 				    9, 10, 11, 13, 14, };
 static const struct clk_parent_data gen_clk_parent_data[] = {
@@ -1966,6 +2026,9 @@ static struct clk_hw_onecell_data axg_hw_onecell_data = {
 		[CLKID_VCLK2_DIV12]		= &axg_vclk2_div12.hw,
 		[CLKID_CTS_ENCL_SEL]		= &axg_cts_encl_sel.hw,
 		[CLKID_CTS_ENCL]		= &axg_cts_encl.hw,
+		[CLKID_VDIN_MEAS_SEL]		= &axg_vdin_meas_sel.hw,
+		[CLKID_VDIN_MEAS_DIV]		= &axg_vdin_meas_div.hw,
+		[CLKID_VDIN_MEAS]		= &axg_vdin_meas.hw,
 		[NR_CLKS]			= NULL,
 	},
 	.num = NR_CLKS,
@@ -2094,6 +2157,9 @@ static struct clk_regmap *const axg_clk_regmaps[] = {
 	&axg_vclk2_div12_en,
 	&axg_cts_encl_sel,
 	&axg_cts_encl,
+	&axg_vdin_meas_sel,
+	&axg_vdin_meas_div,
+	&axg_vdin_meas,
 };
 
 static const struct meson_eeclkc_data axg_clkc_data = {

drivers/clk/meson/axg.h

@@ -158,8 +158,10 @@
 #define CLKID_VCLK2_DIV6_EN			120
 #define CLKID_VCLK2_DIV12_EN			121
 #define CLKID_CTS_ENCL_SEL			132
+#define CLKID_VDIN_MEAS_SEL			134
+#define CLKID_VDIN_MEAS_DIV			135
 
-#define NR_CLKS					134
+#define NR_CLKS					137
 
 /* include the CLKIDs that have been made part of the DT binding */
 #include <dt-bindings/clock/axg-clkc.h>