clk: meson: meson8b: add the vclk2_en gate clock

HHI_VIID_CLK_CNTL[19] is not part of the public S805 datasheet. However,
the GXBB driver defines this bit as a gate called "vclk2" and in the
3.10 kernel GPL code dump the following line can found:
  WRITE_LCD_CBUS_REG_BITS(HHI_VIID_CLK_CNTL, 0, 19, 1); //disable vclk2_en

Add this gate clock to the Meson8/Meson8b/Meson8m2 clock controller to
complete the VCLK2 clock tree.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200629203904.2989007-3-martin.blumenstingl@googlemail.com

drivers/clk/meson/meson8b.c

@@ -1387,6 +1387,22 @@ static struct clk_regmap meson8b_vclk2_clk_in_en = {
 	},
 };
 
+static struct clk_regmap meson8b_vclk2_clk_en = {
+	.data = &(struct clk_regmap_gate_data){
+		.offset = HHI_VIID_CLK_DIV,
+		.bit_idx = 19,
+	},
+	.hw.init = &(struct clk_init_data){
+		.name = "vclk2_en",
+		.ops = &clk_regmap_gate_ro_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&meson8b_vclk2_clk_in_en.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+};
+
 static struct clk_regmap meson8b_vclk2_div1_gate = {
 	.data = &(struct clk_regmap_gate_data){
 		.offset = HHI_VIID_CLK_DIV,
@@ -1396,7 +1412,7 @@ static struct clk_regmap meson8b_vclk2_div1_gate = {
 		.name = "vclk2_div1_en",
 		.ops = &clk_regmap_gate_ro_ops,
 		.parent_hws = (const struct clk_hw *[]) {
-			&meson8b_vclk2_clk_in_en.hw
+			&meson8b_vclk2_clk_en.hw
 		},
 		.num_parents = 1,
 		.flags = CLK_SET_RATE_PARENT,
@@ -1410,7 +1426,7 @@ static struct clk_fixed_factor meson8b_vclk2_div2_div = {
 		.name = "vclk2_div2",
 		.ops = &clk_fixed_factor_ops,
 		.parent_hws = (const struct clk_hw *[]) {
-			&meson8b_vclk2_clk_in_en.hw
+			&meson8b_vclk2_clk_en.hw
 		},
 		.num_parents = 1,
 		.flags = CLK_SET_RATE_PARENT,
@@ -1440,7 +1456,7 @@ static struct clk_fixed_factor meson8b_vclk2_div4_div = {
 		.name = "vclk2_div4",
 		.ops = &clk_fixed_factor_ops,
 		.parent_hws = (const struct clk_hw *[]) {
-			&meson8b_vclk2_clk_in_en.hw
+			&meson8b_vclk2_clk_en.hw
 		},
 		.num_parents = 1,
 		.flags = CLK_SET_RATE_PARENT,
@@ -1470,7 +1486,7 @@ static struct clk_fixed_factor meson8b_vclk2_div6_div = {
 		.name = "vclk2_div6",
 		.ops = &clk_fixed_factor_ops,
 		.parent_hws = (const struct clk_hw *[]) {
-			&meson8b_vclk2_clk_in_en.hw
+			&meson8b_vclk2_clk_en.hw
 		},
 		.num_parents = 1,
 		.flags = CLK_SET_RATE_PARENT,
@@ -1500,7 +1516,7 @@ static struct clk_fixed_factor meson8b_vclk2_div12_div = {
 		.name = "vclk2_div12",
 		.ops = &clk_fixed_factor_ops,
 		.parent_hws = (const struct clk_hw *[]) {
-			&meson8b_vclk2_clk_in_en.hw
+			&meson8b_vclk2_clk_en.hw
 		},
 		.num_parents = 1,
 		.flags = CLK_SET_RATE_PARENT,
@@ -2848,6 +2864,7 @@ static struct clk_hw_onecell_data meson8_hw_onecell_data = {
 		[CLKID_VCLK_DIV12]	    = &meson8b_vclk_div12_div_gate.hw,
 		[CLKID_VCLK2_IN_SEL]	    = &meson8b_vclk2_in_sel.hw,
 		[CLKID_VCLK2_IN_EN]	    = &meson8b_vclk2_clk_in_en.hw,
+		[CLKID_VCLK2_EN]	    = &meson8b_vclk2_clk_en.hw,
 		[CLKID_VCLK2_DIV1]	    = &meson8b_vclk2_div1_gate.hw,
 		[CLKID_VCLK2_DIV2_DIV]	    = &meson8b_vclk2_div2_div.hw,
 		[CLKID_VCLK2_DIV2]	    = &meson8b_vclk2_div2_div_gate.hw,
@@ -3054,6 +3071,7 @@ static struct clk_hw_onecell_data meson8b_hw_onecell_data = {
 		[CLKID_VCLK_DIV12]	    = &meson8b_vclk_div12_div_gate.hw,
 		[CLKID_VCLK2_IN_SEL]	    = &meson8b_vclk2_in_sel.hw,
 		[CLKID_VCLK2_IN_EN]	    = &meson8b_vclk2_clk_in_en.hw,
+		[CLKID_VCLK2_EN]	    = &meson8b_vclk2_clk_en.hw,
 		[CLKID_VCLK2_DIV1]	    = &meson8b_vclk2_div1_gate.hw,
 		[CLKID_VCLK2_DIV2_DIV]	    = &meson8b_vclk2_div2_div.hw,
 		[CLKID_VCLK2_DIV2]	    = &meson8b_vclk2_div2_div_gate.hw,
@@ -3271,6 +3289,7 @@ static struct clk_hw_onecell_data meson8m2_hw_onecell_data = {
 		[CLKID_VCLK_DIV12]	    = &meson8b_vclk_div12_div_gate.hw,
 		[CLKID_VCLK2_IN_SEL]	    = &meson8b_vclk2_in_sel.hw,
 		[CLKID_VCLK2_IN_EN]	    = &meson8b_vclk2_clk_in_en.hw,
+		[CLKID_VCLK2_EN]	    = &meson8b_vclk2_clk_en.hw,
 		[CLKID_VCLK2_DIV1]	    = &meson8b_vclk2_div1_gate.hw,
 		[CLKID_VCLK2_DIV2_DIV]	    = &meson8b_vclk2_div2_div.hw,
 		[CLKID_VCLK2_DIV2]	    = &meson8b_vclk2_div2_div_gate.hw,
@@ -3470,6 +3489,7 @@ static struct clk_regmap *const meson8b_clk_regmaps[] = {
 	&meson8b_vclk_div12_div_gate,
 	&meson8b_vclk2_in_sel,
 	&meson8b_vclk2_clk_in_en,
+	&meson8b_vclk2_clk_en,
 	&meson8b_vclk2_div1_gate,
 	&meson8b_vclk2_div2_div_gate,
 	&meson8b_vclk2_div4_div_gate,

drivers/clk/meson/meson8b.h

@@ -181,8 +181,9 @@
 #define CLKID_CTS_MCLK_I958_SEL	210
 #define CLKID_CTS_MCLK_I958_DIV	211
 #define CLKID_VCLK_EN		214
+#define CLKID_VCLK2_EN		215
 
-#define CLK_NR_CLKS		215
+#define CLK_NR_CLKS		216
 
 /*
  * include the CLKID and RESETID that have