clk: meson: gxbb: claim clock controller input clock from DT

Instead of relying on a fixed name for the xtal clock, claim the
controller input clock trough DT.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://lkml.kernel.org/r/20190116175435.4990-2-jbrunet@baylibre.com

drivers/clk/meson/gxbb.c

@@ -16,6 +16,8 @@
 #include "gxbb.h"
 #include "clk-regmap.h"
 
+#define IN_PREFIX "ee-in-"
+
 static DEFINE_SPINLOCK(meson_clk_lock);
 
 static const struct pll_params_table gxbb_gp0_pll_params_table[] = {
@@ -118,7 +120,7 @@ static struct clk_regmap gxbb_fixed_pll_dco = {
 	.hw.init = &(struct clk_init_data){
 		.name = "fixed_pll_dco",
 		.ops = &meson_clk_pll_ro_ops,
-		.parent_names = (const char *[]){ "xtal" },
+		.parent_names = (const char *[]){ IN_PREFIX "xtal" },
 		.num_parents = 1,
 	},
 };
@@ -148,7 +150,7 @@ static struct clk_fixed_factor gxbb_hdmi_pll_pre_mult = {
 	.hw.init = &(struct clk_init_data){
 		.name = "hdmi_pll_pre_mult",
 		.ops = &clk_fixed_factor_ops,
-		.parent_names = (const char *[]){ "xtal" },
+		.parent_names = (const char *[]){ IN_PREFIX "xtal" },
 		.num_parents = 1,
 	},
 };
@@ -241,7 +243,7 @@ static struct clk_regmap gxl_hdmi_pll_dco = {
 	.hw.init = &(struct clk_init_data){
 		.name = "hdmi_pll_dco",
 		.ops = &meson_clk_pll_ro_ops,
-		.parent_names = (const char *[]){ "xtal" },
+		.parent_names = (const char *[]){ IN_PREFIX "xtal" },
 		.num_parents = 1,
 		/*
 		 * Display directly handle hdmi pll registers ATM, we need
@@ -378,7 +380,7 @@ static struct clk_regmap gxbb_sys_pll_dco = {
 	.hw.init = &(struct clk_init_data){
 		.name = "sys_pll_dco",
 		.ops = &meson_clk_pll_ro_ops,
-		.parent_names = (const char *[]){ "xtal" },
+		.parent_names = (const char *[]){ IN_PREFIX "xtal" },
 		.num_parents = 1,
 	},
 };
@@ -439,7 +441,7 @@ static struct clk_regmap gxbb_gp0_pll_dco = {
 	.hw.init = &(struct clk_init_data){
 		.name = "gp0_pll_dco",
 		.ops = &meson_clk_pll_ops,
-		.parent_names = (const char *[]){ "xtal" },
+		.parent_names = (const char *[]){ IN_PREFIX "xtal" },
 		.num_parents = 1,
 	},
 };
@@ -491,7 +493,7 @@ static struct clk_regmap gxl_gp0_pll_dco = {
 	.hw.init = &(struct clk_init_data){
 		.name = "gp0_pll_dco",
 		.ops = &meson_clk_pll_ops,
-		.parent_names = (const char *[]){ "xtal" },
+		.parent_names = (const char *[]){ IN_PREFIX "xtal" },
 		.num_parents = 1,
 	},
 };
@@ -789,7 +791,7 @@ static struct clk_regmap gxbb_mpll2 = {
 
 static u32 mux_table_clk81[]	= { 0, 2, 3, 4, 5, 6, 7 };
 static const char * const clk81_parent_names[] = {
-	"xtal", "fclk_div7", "mpll1", "mpll2", "fclk_div4",
+	IN_PREFIX "xtal", "fclk_div7", "mpll1", "mpll2", "fclk_div4",
 	"fclk_div3", "fclk_div5"
 };
 
@@ -852,7 +854,7 @@ static struct clk_regmap gxbb_sar_adc_clk_sel = {
 		.name = "sar_adc_clk_sel",
 		.ops = &clk_regmap_mux_ops,
 		/* NOTE: The datasheet doesn't list the parents for bit 10 */
-		.parent_names = (const char *[]){ "xtal", "clk81", },
+		.parent_names = (const char *[]){ IN_PREFIX "xtal", "clk81", },
 		.num_parents = 2,
 	},
 };
@@ -891,7 +893,7 @@ static struct clk_regmap gxbb_sar_adc_clk = {
  */
 
 static const char * const gxbb_mali_0_1_parent_names[] = {
-	"xtal", "gp0_pll", "mpll2", "mpll1", "fclk_div7",
+	IN_PREFIX "xtal", "gp0_pll", "mpll2", "mpll1", "fclk_div7",
 	"fclk_div4", "fclk_div3", "fclk_div5"
 };
 
@@ -1153,7 +1155,7 @@ static struct clk_regmap gxbb_32k_clk = {
 };
 
 static const char * const gxbb_32k_clk_parent_names[] = {
-	"xtal", "cts_slow_oscin", "fclk_div3", "fclk_div5"
+	IN_PREFIX "xtal", "cts_slow_oscin", "fclk_div3", "fclk_div5"
 };
 
 static struct clk_regmap gxbb_32k_clk_sel = {
@@ -1172,7 +1174,7 @@ static struct clk_regmap gxbb_32k_clk_sel = {
 };
 
 static const char * const gxbb_sd_emmc_clk0_parent_names[] = {
-	"xtal", "fclk_div2", "fclk_div3", "fclk_div5", "fclk_div7",
+	IN_PREFIX "xtal", "fclk_div2", "fclk_div3", "fclk_div5", "fclk_div7",
 
 	/*
 	 * Following these parent clocks, we should also have had mpll2, mpll3
@@ -2138,7 +2140,7 @@ static struct clk_regmap gxbb_hdmi_tx = {
 /* HDMI Clocks */
 
 static const char * const gxbb_hdmi_parent_names[] = {
-	"xtal", "fclk_div4", "fclk_div3", "fclk_div5"
+	IN_PREFIX "xtal", "fclk_div4", "fclk_div3", "fclk_div5"
 };
 
 static struct clk_regmap gxbb_hdmi_sel = {
@@ -2285,7 +2287,7 @@ static struct clk_regmap gxbb_vdec_hevc = {
 static u32 mux_table_gen_clk[]	= { 0, 4, 5, 6, 7, 8,
 				    9, 10, 11, 13, 14, };
 static const char * const gen_clk_parent_names[] = {
-	"xtal", "vdec_1", "vdec_hevc", "mpll0", "mpll1", "mpll2",
+	IN_PREFIX "xtal", "vdec_1", "vdec_hevc", "mpll0", "mpll1", "mpll2",
 	"fclk_div4", "fclk_div3", "fclk_div5", "fclk_div7", "gp0_pll",
 };
 
@@ -3085,6 +3087,7 @@ static const struct of_device_id clkc_match_table[] = {
 static int gxbb_clkc_probe(struct platform_device *pdev)
 {
 	const struct clkc_data *clkc_data;
+	struct clk_hw *input;
 	struct regmap *map;
 	int ret, i;
 	struct device *dev = &pdev->dev;
@@ -3100,6 +3103,14 @@ static int gxbb_clkc_probe(struct platform_device *pdev)
 		return PTR_ERR(map);
 	}
 
+	input = meson_clk_hw_register_input(dev, "xtal", IN_PREFIX "xtal", 0);
+	if (IS_ERR(input)) {
+		ret = PTR_ERR(input);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "failed to get input clock");
+		return ret;
+	}
+
 	/* Populate regmap for the common regmap backed clocks */
 	for (i = 0; i < ARRAY_SIZE(gx_clk_regmaps); i++)
 		gx_clk_regmaps[i]->map = map;