linux-kernel - [PATCH 09/11] ASoC: wcd9335: switch to using gpiod API

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Date:   Tue, 15 Nov 2022 21:38:15 -0800
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>
Cc:     linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 09/11] ASoC: wcd9335: switch to using gpiod API

Switch the driver from legacy gpio API that is deprecated to the newer
gpiod API that respects line polarities described in ACPI/DT.

Also the old code did not actually request the reset line, but was
toggling it directly; this has been fixed.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 sound/soc/codecs/wcd9335.c | 33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/sound/soc/codecs/wcd9335.c b/sound/soc/codecs/wcd9335.c
index d2548fdf9ae5..27cbec3e6763 100644
--- a/sound/soc/codecs/wcd9335.c
+++ b/sound/soc/codecs/wcd9335.c
@@ -11,12 +11,13 @@
 #include <linux/regulator/consumer.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
 #include <linux/kernel.h>
 #include <linux/slimbus.h>
 #include <sound/soc.h>
 #include <sound/pcm_params.h>
 #include <sound/soc-dapm.h>
-#include <linux/of_gpio.h>
 #include <linux/of.h>
 #include <linux/of_irq.h>
 #include <sound/tlv.h>
@@ -329,7 +330,7 @@ struct wcd9335_codec {
 	int comp_enabled[COMPANDER_MAX];
 
 	int intr1;
-	int reset_gpio;
+	struct gpio_desc *reset_gpio;
 	struct regulator_bulk_data supplies[WCD9335_MAX_SUPPLY];
 
 	unsigned int rx_port_value[WCD9335_RX_MAX];
@@ -5032,25 +5033,27 @@ static const struct regmap_irq_chip wcd9335_regmap_irq1_chip = {
 static int wcd9335_parse_dt(struct wcd9335_codec *wcd)
 {
 	struct device *dev = wcd->dev;
-	struct device_node *np = dev->of_node;
 	int ret;
 
-	wcd->reset_gpio = of_get_named_gpio(np,	"reset-gpios", 0);
-	if (wcd->reset_gpio < 0) {
-		dev_err(dev, "Reset GPIO missing from DT\n");
-		return wcd->reset_gpio;
+	wcd->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	ret = PTR_ERR_OR_ZERO(wcd->reset_gpio);
+	if (ret) {
+		dev_err(dev, "failed to request reset GPIO: %d\n", ret);
+		return ret;
 	}
 
 	wcd->mclk = devm_clk_get(dev, "mclk");
-	if (IS_ERR(wcd->mclk)) {
-		dev_err(dev, "mclk not found\n");
-		return PTR_ERR(wcd->mclk);
+	ret = PTR_ERR_OR_ZERO(wcd->mclk);
+	if (ret) {
+		dev_err(dev, "mclk not found: %d\n", ret);
+		return ret;
 	}
 
 	wcd->native_clk = devm_clk_get(dev, "slimbus");
-	if (IS_ERR(wcd->native_clk)) {
-		dev_err(dev, "slimbus clock not found\n");
-		return PTR_ERR(wcd->native_clk);
+	ret = PTR_ERR_OR_ZERO(wcd->native_clk);
+	if (ret) {
+		dev_err(dev, "slimbus clock not found: %d\n", ret);
+		return ret;
 	}
 
 	wcd->supplies[0].supply = "vdd-buck";
@@ -5088,9 +5091,9 @@ static int wcd9335_power_on_reset(struct wcd9335_codec *wcd)
 	 */
 	usleep_range(600, 650);
 
-	gpio_direction_output(wcd->reset_gpio, 0);
+	gpiod_set_value_cansleep(wcd->reset_gpio, 1);
 	msleep(20);
-	gpio_set_value(wcd->reset_gpio, 1);
+	gpiod_set_value_cansleep(wcd->reset_gpio, 0);
 	msleep(20);
 
 	return 0;
-- 
2.38.1.431.g37b22c650d-goog