[PATCH 1/6] ASoC: wcd938x: switch to using gpiod API

Krzysztof Kozlowski
2023-04-20T10:18:47Z

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>

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

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
[krzysztof: rebased on recent dev_err_probe() changes]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

---

Cc: Patrick Lai <quic_plai@quicinc.com>
---
sound/soc/codecs/wcd938x.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)

diff --git a/sound/soc/codecs/wcd938x.c b/sound/soc/codecs/wcd938x.c
index 11b264a63b04..33fd8fdde9fd 100644
--- a/sound/soc/codecs/wcd938x.c
+++ b/sound/soc/codecs/wcd938x.c
@@ -6,12 +6,14 @@
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/delay.h>
+#include <linux/err.h>
#include <linux/gpio/consumer.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
#include <linux/kernel.h>
#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>
@@ -194,7 +196,7 @@ 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;
@@ -4234,16 +4236,16 @@ 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,
- "Failed to get reset gpio\n");
+ wcd938x->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_ASIS);
+ ret = PTR_ERR_OR_ZERO(wcd938x->reset_gpio);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to get reset gpio\n");

wcd938x->us_euro_gpio = devm_gpiod_get_optional(dev, "us-euro",
GPIOD_OUT_LOW);
- if (IS_ERR(wcd938x->us_euro_gpio))
- return dev_err_probe(dev, PTR_ERR(wcd938x->us_euro_gpio),
- "us-euro swap Control GPIO not found\n");
+ ret = PTR_ERR_OR_ZERO(wcd938x->us_euro_gpio);
+ if (ret)
+ return dev_err_probe(dev, ret, "us-euro swap Control GPIO not found\n");

cfg->swap_gnd_mic = wcd938x_swap_gnd_mic;

@@ -4278,11 +4280,11 @@ 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);
- /* 20us sleep required after pulling the reset gpio to LOW */
+ gpiod_set_value_cansleep(wcd938x->reset_gpio, 1);
+ /* 20us sleep required after asserting the reset gpio */
usleep_range(20, 30);
- gpio_set_value(wcd938x->reset_gpio, 1);
- /* 20us sleep required after pulling the reset gpio to HIGH */
+ gpiod_set_value_cansleep(wcd938x->reset_gpio, 0);
+ /* 20us sleep required after releasing the reset gpio */
usleep_range(20, 30);

return 0;
--
2.34.1