[PATCH] mfd: stmpe: switch to using gpiod API

From: Dmitry Torokhov
Date: Tue Sep 06 2022 - 01:02:03 EST


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@xxxxxxxxx>
---
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