linux-kernel - [PATCH] mfd: stmpe: switch to using gpiod API

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Date:   Mon, 5 Sep 2022 22:01:47 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Lee Jones <lee@...nel.org>
Cc:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mfd: stmpe: switch to using gpiod API

This patch switches the driver away from legacy gpio/of_gpio API to
gpiod API, and removes use of of_get_named_gpio_flags() which I want to
make private to gpiolib.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
 drivers/mfd/stmpe.c | 36 +++++++++++++-----------------------
 1 file changed, 13 insertions(+), 23 deletions(-)

diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c
index 987e251d90ae..0c4f74197d3e 100644
--- a/drivers/mfd/stmpe.c
+++ b/drivers/mfd/stmpe.c
@@ -8,14 +8,13 @@
  */
 
 #include <linux/err.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/export.h>
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/pm.h>
 #include <linux/slab.h>
 #include <linux/mfd/core.h>
@@ -30,17 +29,12 @@
  * @irq_trigger: IRQ trigger to use for the interrupt to the host
  * @autosleep: bool to enable/disable stmpe autosleep
  * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
- * @irq_over_gpio: true if gpio is used to get irq
- * @irq_gpio: gpio number over which irq will be requested (significant only if
- *	      irq_over_gpio is true)
  */
 struct stmpe_platform_data {
 	int id;
 	unsigned int blocks;
 	unsigned int irq_trigger;
 	bool autosleep;
-	bool irq_over_gpio;
-	int irq_gpio;
 	int autosleep_timeout;
 };
 
@@ -1349,13 +1343,6 @@ static void stmpe_of_probe(struct stmpe_platform_data *pdata,
 	if (pdata->id < 0)
 		pdata->id = -1;
 
-	pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0,
-				&pdata->irq_trigger);
-	if (gpio_is_valid(pdata->irq_gpio))
-		pdata->irq_over_gpio = 1;
-	else
-		pdata->irq_trigger = IRQF_TRIGGER_NONE;
-
 	of_property_read_u32(np, "st,autosleep-timeout",
 			&pdata->autosleep_timeout);
 
@@ -1381,6 +1368,7 @@ int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
 	struct stmpe_platform_data *pdata;
 	struct device_node *np = ci->dev->of_node;
 	struct stmpe *stmpe;
+	struct gpio_desc *irq_gpio;
 	int ret;
 	u32 val;
 
@@ -1434,18 +1422,20 @@ int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
 	if (ci->init)
 		ci->init(stmpe);
 
-	if (pdata->irq_over_gpio) {
-		ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio,
-				GPIOF_DIR_IN, "stmpe");
-		if (ret) {
-			dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n",
-					ret);
-			return ret;
-		}
+	irq_gpio = devm_gpiod_get_optional(ci->dev, "irq", GPIOD_ASIS);
+	ret = PTR_ERR_OR_ZERO(irq_gpio);
+	if (ret) {
+		dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", ret);
+		return ret;
+	}
 
-		stmpe->irq = gpio_to_irq(pdata->irq_gpio);
+	if (irq_gpio) {
+		stmpe->irq = gpiod_to_irq(irq_gpio);
+		pdata->irq_trigger = gpiod_is_active_low(irq_gpio) ?
+					IRQF_TRIGGER_LOW : IRQF_TRIGGER_HIGH;
 	} else {
 		stmpe->irq = ci->irq;
+		pdata->irq_trigger = IRQF_TRIGGER_NONE;
 	}
 
 	if (stmpe->irq < 0) {
-- 
2.37.2.789.g6183377224-goog


-- 
Dmitry