diff mbox series

[4/8] gpiolib: remove gpio_set_debounce

Message ID 20230126132801.2042371-5-arnd@kernel.org
State New
Headers show
Series gpiolib cleanups | expand

Commit Message

Arnd Bergmann Jan. 26, 2023, 1:27 p.m. UTC 
From: Arnd Bergmann <arnd@arndb.de>

gpio_set_debounce() only has a single user, which is trivially
converted to gpiod_set_debounce().

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 Documentation/driver-api/gpio/legacy.rst |  2 --
 drivers/input/touchscreen/ads7846.c      | 24 +++++++++++++-----------
 include/linux/gpio.h                     | 22 ----------------------
 3 files changed, 13 insertions(+), 35 deletions(-)

Comments

Andy Shevchenko Jan. 26, 2023, 1:50 p.m. UTC | #1 
On Thu, Jan 26, 2023 at 02:27:57PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> gpio_set_debounce() only has a single user, which is trivially
> converted to gpiod_set_debounce().

Also need to mention the gpio_cansleep() removal.

P.S. Fun fact that I was yesterday thinking about the pretty much
the same change, except intrusive conversion of the user.

...

>  Documentation/driver-api/gpio/legacy.rst |  2 --

Documentation/translations/zh_CN/driver-api/gpio/legacy.rst:222:                gpio_set_debounce()
Documentation/translations/zh_TW/gpio.txt:229:  gpio_set_debounce()


>  drivers/input/touchscreen/ads7846.c      | 24 +++++++++++++-----------
>  include/linux/gpio.h                     | 22 ----------------------

...

>  #include <linux/of_gpio.h>

Do we need this?

>  #include <linux/of_device.h>
> +#include <linux/gpio/consumer.h>

>  #include <linux/gpio.h>

And this?
Arnd Bergmann Jan. 26, 2023, 3:30 p.m. UTC | #2 
On Thu, Jan 26, 2023, at 14:50, Andy Shevchenko wrote:
> On Thu, Jan 26, 2023 at 02:27:57PM +0100, Arnd Bergmann wrote:
>> From: Arnd Bergmann <arnd@arndb.de>
>> 
>> gpio_set_debounce() only has a single user, which is trivially
>> converted to gpiod_set_debounce().
>
> Also need to mention the gpio_cansleep() removal.

Indeed, I think that bit got lost in one of the rebases
after some of the other functions that I originally
removed here are already gone.

I've dropped the gpio_cansleep change for now, we can
revisit this later and possibly drop it at the same
time as gpio_{get,set}_value_cansleep that are still
used in a handful of places that could use gpiod
instead.

> P.S. Fun fact that I was yesterday thinking about the pretty much
> the same change, except intrusive conversion of the user.
>
> ...
>
>>  Documentation/driver-api/gpio/legacy.rst |  2 --
>
> Documentation/translations/zh_CN/driver-api/gpio/legacy.rst:222:        
>         gpio_set_debounce()
> Documentation/translations/zh_TW/gpio.txt:229:  gpio_set_debounce()

Fixed.

>>  drivers/input/touchscreen/ads7846.c      | 24 +++++++++++++-----------
>>  include/linux/gpio.h                     | 22 ----------------------
>
> ...
>
>>  #include <linux/of_gpio.h>
>
> Do we need this?

Dropped now.

>>  #include <linux/of_device.h>
>> +#include <linux/gpio/consumer.h>
>
>>  #include <linux/gpio.h>
>
> And this?

I think we still need both linux/gpio/consumer.h and linux/gpio.h
since there is still a call to devm_gpio_request_one() and
gpio_is_valid().

    Arnd
Linus Walleij Jan. 27, 2023, 1:09 p.m. UTC | #3 
On Thu, Jan 26, 2023 at 2:28 PM Arnd Bergmann <arnd@kernel.org> wrote:

> From: Arnd Bergmann <arnd@arndb.de>
>
> gpio_set_debounce() only has a single user, which is trivially
> converted to gpiod_set_debounce().
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Thanks for shrinking the legacy API surface.

With the fixes pointed out by Andy:
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij
diff mbox series

Patch

diff --git a/Documentation/driver-api/gpio/legacy.rst b/Documentation/driver-api/gpio/legacy.rst
index a0559d93efd1..e0306e78e34b 100644
--- a/Documentation/driver-api/gpio/legacy.rst
+++ b/Documentation/driver-api/gpio/legacy.rst
@@ -238,8 +238,6 @@  setup or driver probe/teardown code, so this is an easy constraint.)::
         ## 	gpio_free_array()
 
                 gpio_free()
-                gpio_set_debounce()
-
 
 
 Claiming and Releasing GPIOs
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 4c3dd01902d0..354da71ff037 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -27,6 +27,7 @@ 
 #include <linux/of.h>
 #include <linux/of_gpio.h>
 #include <linux/of_device.h>
+#include <linux/gpio/consumer.h>
 #include <linux/gpio.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/ads7846.h>
@@ -139,7 +140,7 @@  struct ads7846 {
 	int			(*filter)(void *data, int data_idx, int *val);
 	void			*filter_data;
 	int			(*get_pendown_state)(void);
-	int			gpio_pendown;
+	struct gpio_desc	*gpio_pendown;
 
 	void			(*wait_for_sync)(void);
 };
@@ -222,7 +223,7 @@  static int get_pendown_state(struct ads7846 *ts)
 	if (ts->get_pendown_state)
 		return ts->get_pendown_state();
 
-	return !gpio_get_value(ts->gpio_pendown);
+	return !gpiod_get_value(ts->gpio_pendown);
 }
 
 static void ads7846_report_pen_up(struct ads7846 *ts)
@@ -1005,7 +1006,6 @@  static int ads7846_setup_pendown(struct spi_device *spi,
 	if (pdata->get_pendown_state) {
 		ts->get_pendown_state = pdata->get_pendown_state;
 	} else if (gpio_is_valid(pdata->gpio_pendown)) {
-
 		err = devm_gpio_request_one(&spi->dev, pdata->gpio_pendown,
 					    GPIOF_IN, "ads7846_pendown");
 		if (err) {
@@ -1015,15 +1015,17 @@  static int ads7846_setup_pendown(struct spi_device *spi,
 			return err;
 		}
 
-		ts->gpio_pendown = pdata->gpio_pendown;
-
-		if (pdata->gpio_pendown_debounce)
-			gpio_set_debounce(pdata->gpio_pendown,
-					  pdata->gpio_pendown_debounce);
+		ts->gpio_pendown = gpio_to_desc(pdata->gpio_pendown);
 	} else {
-		dev_err(&spi->dev, "no get_pendown_state nor gpio_pendown?\n");
-		return -EINVAL;
+		ts->gpio_pendown = gpiod_get(&spi->dev, "pendown-gpio", GPIOD_IN);
+		if (IS_ERR(ts->gpio_pendown)) {
+			dev_err(&spi->dev, "no get_pendown_state nor gpio_pendown?\n");
+			return PTR_ERR(ts->gpio_pendown);
+		}
 	}
+	if (pdata->gpio_pendown_debounce)
+		gpiod_set_debounce(ts->gpio_pendown,
+				   pdata->gpio_pendown_debounce);
 
 	return 0;
 }
@@ -1192,7 +1194,7 @@  static const struct ads7846_platform_data *ads7846_probe_dt(struct device *dev)
 	pdata->wakeup = of_property_read_bool(node, "wakeup-source") ||
 			of_property_read_bool(node, "linux,wakeup");
 
-	pdata->gpio_pendown = of_get_named_gpio(dev->of_node, "pendown-gpio", 0);
+	pdata->gpio_pendown = -1;
 
 	return pdata;
 }
diff --git a/include/linux/gpio.h b/include/linux/gpio.h
index e273a3287d8e..da7a5ae68e47 100644
--- a/include/linux/gpio.h
+++ b/include/linux/gpio.h
@@ -100,11 +100,6 @@  static inline int gpio_direction_output(unsigned gpio, int value)
 	return gpiod_direction_output_raw(gpio_to_desc(gpio), value);
 }
 
-static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
-{
-	return gpiod_set_debounce(gpio_to_desc(gpio), debounce);
-}
-
 static inline int gpio_get_value_cansleep(unsigned gpio)
 {
 	return gpiod_get_raw_value_cansleep(gpio_to_desc(gpio));
@@ -123,11 +118,6 @@  static inline void gpio_set_value(unsigned gpio, int value)
 	return gpiod_set_raw_value(gpio_to_desc(gpio), value);
 }
 
-static inline int gpio_cansleep(unsigned gpio)
-{
-	return gpiod_cansleep(gpio_to_desc(gpio));
-}
-
 static inline int gpio_to_irq(unsigned gpio)
 {
 	return gpiod_to_irq(gpio_to_desc(gpio));
@@ -215,11 +205,6 @@  static inline int gpio_direction_output(unsigned gpio, int value)
 	return -ENOSYS;
 }
 
-static inline int gpio_set_debounce(unsigned gpio, unsigned debounce)
-{
-	return -ENOSYS;
-}
-
 static inline int gpio_get_value(unsigned gpio)
 {
 	/* GPIO can never have been requested or set as {in,out}put */
@@ -233,13 +218,6 @@  static inline void gpio_set_value(unsigned gpio, int value)
 	WARN_ON(1);
 }
 
-static inline int gpio_cansleep(unsigned gpio)
-{
-	/* GPIO can never have been requested or set as {in,out}put */
-	WARN_ON(1);
-	return 0;
-}
-
 static inline int gpio_get_value_cansleep(unsigned gpio)
 {
 	/* GPIO can never have been requested or set as {in,out}put */