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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/sound/soc/codecs/sta32x.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Codec driver for ST STA32x 2.1-channel high-efficiency digital audio system
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  *
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..
@@ -9,11 +10,6 @@
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  *	  Mark Brown <broonie@opensource.wolfsonmicro.com>
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  *	Freescale Semiconductor, Inc.
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  *	  Timur Tabi <timur@freescale.com>
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- *
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- * This program is free software; you can redistribute  it and/or modify it
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- * under  the terms of  the GNU General  Public License as published by the
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- * Free Software Foundation;  either version 2 of the  License, or (at your
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- * option) any later version.
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  */
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14
 
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 #define pr_fmt(fmt) KBUILD_MODNAME ":%s:%d: " fmt, __func__, __LINE__
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@@ -21,6 +17,7 @@
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 #include <linux/module.h>
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 #include <linux/moduleparam.h>
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 #include <linux/init.h>
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+#include <linux/clk.h>
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 #include <linux/delay.h>
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 #include <linux/pm.h>
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 #include <linux/i2c.h>
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@@ -142,6 +139,7 @@
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 /* codec private data */
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 struct sta32x_priv {
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 	struct regmap *regmap;
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+	struct clk *xti_clk;
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 	struct regulator_bulk_data supplies[ARRAY_SIZE(sta32x_supply_names)];
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 	struct snd_soc_component *component;
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 	struct sta32x_platform_data *pdata;
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@@ -399,9 +397,9 @@
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 	unsigned int confa, confa_cached;
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398
 
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 	/* check if sta32x has reset itself */
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-	confa_cached = snd_soc_component_read32(component, STA32X_CONFA);
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+	confa_cached = snd_soc_component_read(component, STA32X_CONFA);
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 	regcache_cache_bypass(sta32x->regmap, true);
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-	confa = snd_soc_component_read32(component, STA32X_CONFA);
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+	confa = snd_soc_component_read(component, STA32X_CONFA);
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 	regcache_cache_bypass(sta32x->regmap, false);
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 	if (confa != confa_cached) {
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 		regcache_mark_dirty(sta32x->regmap);
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@@ -699,7 +697,7 @@
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 	switch (params_width(params)) {
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 	case 24:
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 		dev_dbg(component->dev, "24bit\n");
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-		/* fall through */
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+		fallthrough;
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 	case 32:
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 		dev_dbg(component->dev, "24bit or 32bit\n");
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 		switch (sta32x->format) {
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@@ -882,17 +880,26 @@
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 	sta32x->component = component;
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882
 
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+	if (sta32x->xti_clk) {
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+		ret = clk_prepare_enable(sta32x->xti_clk);
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+		if (ret != 0) {
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+			dev_err(component->dev,
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+				"Failed to enable clock: %d\n", ret);
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+			return ret;
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+		}
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+	}
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+
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 	ret = regulator_bulk_enable(ARRAY_SIZE(sta32x->supplies),
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 				    sta32x->supplies);
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 	if (ret != 0) {
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 		dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
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-		return ret;
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+		goto err_clk_disable_unprepare;
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 	}
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898
 
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 	ret = sta32x_startup_sequence(sta32x);
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 	if (ret < 0) {
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 		dev_err(component->dev, "Failed to startup device\n");
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-		return ret;
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+		goto err_regulator_bulk_disable;
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 	}
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904
 
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 	/* CONFA */
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@@ -976,6 +983,13 @@
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 	regulator_bulk_disable(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
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 	return 0;
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+
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+err_regulator_bulk_disable:
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+	regulator_bulk_disable(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
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+err_clk_disable_unprepare:
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+	if (sta32x->xti_clk)
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+		clk_disable_unprepare(sta32x->xti_clk);
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+	return ret;
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993
 }
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 static void sta32x_remove(struct snd_soc_component *component)
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@@ -984,6 +998,9 @@
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 	sta32x_watchdog_stop(sta32x);
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 	regulator_bulk_disable(ARRAY_SIZE(sta32x->supplies), sta32x->supplies);
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+
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+	if (sta32x->xti_clk)
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+		clk_disable_unprepare(sta32x->xti_clk);
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 }
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1005
 
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 static const struct snd_soc_component_driver sta32x_component = {
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@@ -1041,6 +1058,8 @@
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 	of_property_read_u8(np, "st,ch3-output-mapping",
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 			    &pdata->ch3_output_mapping);
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+	if (of_get_property(np, "st,fault-detect-recovery", NULL))
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+		pdata->fault_detect_recovery = 1;
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 	if (of_get_property(np, "st,thermal-warning-recovery", NULL))
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 		pdata->thermal_warning_recovery = 1;
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 	if (of_get_property(np, "st,thermal-warning-adjustment", NULL))
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@@ -1098,6 +1117,17 @@
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 	}
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 #endif
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1120
+	/* Clock */
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+	sta32x->xti_clk = devm_clk_get(dev, "xti");
1122
+	if (IS_ERR(sta32x->xti_clk)) {
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+		ret = PTR_ERR(sta32x->xti_clk);
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+
1125
+		if (ret == -EPROBE_DEFER)
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+			return ret;
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+
1128
+		sta32x->xti_clk = NULL;
1129
+	}
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+
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 	/* GPIOs */
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 	sta32x->gpiod_nreset = devm_gpiod_get_optional(dev, "reset",
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 						       GPIOD_OUT_LOW);