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

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Message-Id: <20230420101617.142225-2-krzysztof.kozlowski@linaro.org>
Date:   Thu, 20 Apr 2023 12:16:12 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Vinod Koul <vkoul@...nel.org>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Patrick Lai <quic_plai@...cinc.com>
Subject: [PATCH 1/6] ASoC: wcd938x: switch to using gpiod API

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

---

Cc: Patrick Lai <quic_plai@...cinc.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