[PATCH v2 2/3] ASoC: codec: wcd938x: Convert to GPIO descriptors

[Peng Fan (OSS)]

From: Peng Fan <peng.fan@xxxxxxx>

of_gpio.h is deprecated, update the driver to use GPIO descriptors.
 - Use dev_gpiod_get to get GPIO descriptor.
 - Use gpiod_set_value to configure output value.

With legacy of_gpio API, the driver set gpio value 0 to assert reset,
and 1 to deassert reset. And the reset-gpios use GPIO_ACTIVE_LOW flag in
DTS, so set GPIOD_OUT_LOW when get GPIO descriptors, and set value 1 means
output low, set value 0 means output high with gpiod API.

The in-tree DTS files have the right polarity set up already so we
can expect this to "just work".

Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
---
 sound/soc/codecs/wcd938x.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c
index 1ae498c323912ed799dcc033e7777936d90c9284..955a0d3a77d7cb45932faa0c7a6f5060232d33b4 100644
--- a/sound/soc/codecs/wcd938x.c
+++ b/sound/soc/codecs/wcd938x.c
@@ -11,7 +11,6 @@
 #include <linux/pm_runtime.h>
 #include <linux/component.h>
 #include <sound/tlv.h>
-#include <linux/of_gpio.h>
 #include <linux/of.h>
 #include <sound/jack.h>
 #include <sound/pcm.h>
@@ -171,7 +170,7 @@ struct wcd938x_priv {
 	int flyback_cur_det_disable;
 	int ear_rx_path;
 	int variant;
-	int reset_gpio;
+	struct gpio_desc *reset_gpio;
 	struct gpio_desc *us_euro_gpio;
 	u32 micb1_mv;
 	u32 micb2_mv;
@@ -3251,9 +3250,9 @@ static int wcd938x_populate_dt_data(struct wcd938x_priv *wcd938x, struct device
 	struct wcd_mbhc_config *cfg = &wcd938x->mbhc_cfg;
 	int ret;
 
-	wcd938x->reset_gpio = of_get_named_gpio(dev->of_node, "reset-gpios", 0);
-	if (wcd938x->reset_gpio < 0)
-		return dev_err_probe(dev, wcd938x->reset_gpio,
+	wcd938x->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(wcd938x->reset_gpio))
+		return dev_err_probe(dev, PTR_ERR(wcd938x->reset_gpio),
 				     "Failed to get reset gpio\n");
 
 	wcd938x->us_euro_gpio = devm_gpiod_get_optional(dev, "us-euro",
@@ -3297,10 +3296,10 @@ static int wcd938x_populate_dt_data(struct wcd938x_priv *wcd938x, struct device
 
 static int wcd938x_reset(struct wcd938x_priv *wcd938x)
 {
-	gpio_direction_output(wcd938x->reset_gpio, 0);
+	gpiod_set_value(wcd938x->reset_gpio, 1);
 	/* 20us sleep required after pulling the reset gpio to LOW */
 	usleep_range(20, 30);
-	gpio_set_value(wcd938x->reset_gpio, 1);
+	gpiod_set_value(wcd938x->reset_gpio, 0);
 	/* 20us sleep required after pulling the reset gpio to HIGH */
 	usleep_range(20, 30);
 

-- 
2.37.1