clk: meson: gxbb: add cts_i958 clock

This adds the cts_i958 clock to control the clock source of the spdif
output block. This mux is not explicitly mentionned in the documentation
but it is critical to the spdif dai. It is used to select whether the clock
source of the spdif output is cts_amclk (when data are taken from i2s
buffer) or the cts_mclk_i958 (when data are taken from the spdif buffer)

Acked-by: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>

drivers/clk/meson/gxbb.c

@@ -933,6 +933,24 @@ static struct clk_gate gxbb_cts_mclk_i958 = {
 	},
 };
 
+static struct clk_mux gxbb_cts_i958 = {
+	.reg = (void *)HHI_AUD_CLK_CNTL2,
+	.mask = 0x1,
+	.shift = 27,
+	.lock = &clk_lock,
+		.hw.init = &(struct clk_init_data){
+		.name = "cts_i958",
+		.ops = &clk_mux_ops,
+		.parent_names = (const char *[]){ "cts_amclk", "cts_mclk_i958" },
+		.num_parents = 2,
+		/*
+		 *The parent is specific to origin of the audio data. Let the
+		 * consumer choose the appropriate parent
+		 */
+		.flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT,
+	},
+};
+
 /* Everything Else (EE) domain gates */
 static MESON_GATE(gxbb_ddr, HHI_GCLK_MPEG0, 0);
 static MESON_GATE(gxbb_dos, HHI_GCLK_MPEG0, 1);
@@ -1139,6 +1157,7 @@ static struct clk_hw_onecell_data gxbb_hw_onecell_data = {
 		[CLKID_CTS_MCLK_I958]	    = &gxbb_cts_mclk_i958.hw,
 		[CLKID_CTS_MCLK_I958_SEL]   = &gxbb_cts_mclk_i958_sel.hw,
 		[CLKID_CTS_MCLK_I958_DIV]   = &gxbb_cts_mclk_i958_div.hw,
+		[CLKID_CTS_I958]	    = &gxbb_cts_i958.hw,
 	},
 	.num = NR_CLKS,
 };
@@ -1258,6 +1277,7 @@ static struct clk_hw_onecell_data gxl_hw_onecell_data = {
 		[CLKID_CTS_MCLK_I958]	    = &gxbb_cts_mclk_i958.hw,
 		[CLKID_CTS_MCLK_I958_SEL]   = &gxbb_cts_mclk_i958_sel.hw,
 		[CLKID_CTS_MCLK_I958_DIV]   = &gxbb_cts_mclk_i958_div.hw,
+		[CLKID_CTS_I958]	    = &gxbb_cts_i958.hw,
 	},
 	.num = NR_CLKS,
 };
@@ -1382,6 +1402,7 @@ static struct clk_mux *const gxbb_clk_muxes[] = {
 	&gxbb_mali,
 	&gxbb_cts_amclk_sel,
 	&gxbb_cts_mclk_i958_sel,
+	&gxbb_cts_i958,
 };
 
 static struct clk_divider *const gxbb_clk_dividers[] = {