* [PATCH] staging: greybus: use new GPIO line value setter callbacks
@ 2025-04-07 7:14 Bartosz Golaszewski
2025-04-07 13:49 ` Alex Elder
0 siblings, 1 reply; 3+ messages in thread
From: Bartosz Golaszewski @ 2025-04-07 7:14 UTC (permalink / raw)
To: Rui Miguel Silva, Johan Hovold, Alex Elder, Greg Kroah-Hartman,
Linus Walleij, Bartosz Golaszewski
Cc: greybus-dev, linux-staging, linux-kernel, linux-gpio,
Bartosz Golaszewski
From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/staging/greybus/gpio.c | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c
index 16bcf7fc8158..f81c34160f72 100644
--- a/drivers/staging/greybus/gpio.c
+++ b/drivers/staging/greybus/gpio.c
@@ -185,8 +185,8 @@ static int gb_gpio_get_value_operation(struct gb_gpio_controller *ggc,
return 0;
}
-static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
- u8 which, bool value_high)
+static int gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
+ u8 which, bool value_high)
{
struct device *dev = &ggc->gbphy_dev->dev;
struct gb_gpio_set_value_request request;
@@ -195,7 +195,7 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
if (ggc->lines[which].direction == 1) {
dev_warn(dev, "refusing to set value of input gpio %u\n",
which);
- return;
+ return -EPERM;
}
request.which = which;
@@ -204,10 +204,12 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
&request, sizeof(request), NULL, 0);
if (ret) {
dev_err(dev, "failed to set value of gpio %u\n", which);
- return;
+ return ret;
}
ggc->lines[which].value = request.value;
+
+ return 0;
}
static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc,
@@ -457,11 +459,11 @@ static int gb_gpio_get(struct gpio_chip *chip, unsigned int offset)
return ggc->lines[which].value;
}
-static void gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
+static int gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
{
struct gb_gpio_controller *ggc = gpiochip_get_data(chip);
- gb_gpio_set_value_operation(ggc, (u8)offset, !!value);
+ return gb_gpio_set_value_operation(ggc, (u8)offset, !!value);
}
static int gb_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
@@ -555,7 +557,7 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev,
gpio->direction_input = gb_gpio_direction_input;
gpio->direction_output = gb_gpio_direction_output;
gpio->get = gb_gpio_get;
- gpio->set = gb_gpio_set;
+ gpio->set_rv = gb_gpio_set;
gpio->set_config = gb_gpio_set_config;
gpio->base = -1; /* Allocate base dynamically */
gpio->ngpio = ggc->line_max + 1;
---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250331-gpiochip-set-rv-greybus-cd2365755186
Best regards,
--
Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] staging: greybus: use new GPIO line value setter callbacks
2025-04-07 7:14 [PATCH] staging: greybus: use new GPIO line value setter callbacks Bartosz Golaszewski
@ 2025-04-07 13:49 ` Alex Elder
2025-04-07 14:03 ` Rui Miguel Silva
0 siblings, 1 reply; 3+ messages in thread
From: Alex Elder @ 2025-04-07 13:49 UTC (permalink / raw)
To: Bartosz Golaszewski, Rui Miguel Silva, Johan Hovold, Alex Elder,
Greg Kroah-Hartman, Linus Walleij
Cc: greybus-dev, linux-staging, linux-kernel, linux-gpio,
Bartosz Golaszewski
On 4/7/25 2:14 AM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> struct gpio_chip now has callbacks for setting line values that return
> an integer, allowing to indicate failures. Convert the driver to using
> them.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Here is the commit that enabled these:
98ce1eb1fd87e gpiolib: introduce gpio_chip setters that return values
This looks good. Thank you.
Reviewed-by: Alex Elder <elder@riscstar.com>
> ---
> drivers/staging/greybus/gpio.c | 16 +++++++++-------
> 1 file changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c
> index 16bcf7fc8158..f81c34160f72 100644
> --- a/drivers/staging/greybus/gpio.c
> +++ b/drivers/staging/greybus/gpio.c
> @@ -185,8 +185,8 @@ static int gb_gpio_get_value_operation(struct gb_gpio_controller *ggc,
> return 0;
> }
>
> -static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
> - u8 which, bool value_high)
> +static int gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
> + u8 which, bool value_high)
> {
> struct device *dev = &ggc->gbphy_dev->dev;
> struct gb_gpio_set_value_request request;
> @@ -195,7 +195,7 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
> if (ggc->lines[which].direction == 1) {
> dev_warn(dev, "refusing to set value of input gpio %u\n",
> which);
> - return;
> + return -EPERM;
> }
>
> request.which = which;
> @@ -204,10 +204,12 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
> &request, sizeof(request), NULL, 0);
> if (ret) {
> dev_err(dev, "failed to set value of gpio %u\n", which);
> - return;
> + return ret;
> }
>
> ggc->lines[which].value = request.value;
> +
> + return 0;
> }
>
> static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc,
> @@ -457,11 +459,11 @@ static int gb_gpio_get(struct gpio_chip *chip, unsigned int offset)
> return ggc->lines[which].value;
> }
>
> -static void gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
> +static int gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
> {
> struct gb_gpio_controller *ggc = gpiochip_get_data(chip);
>
> - gb_gpio_set_value_operation(ggc, (u8)offset, !!value);
> + return gb_gpio_set_value_operation(ggc, (u8)offset, !!value);
> }
>
> static int gb_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
> @@ -555,7 +557,7 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev,
> gpio->direction_input = gb_gpio_direction_input;
> gpio->direction_output = gb_gpio_direction_output;
> gpio->get = gb_gpio_get;
> - gpio->set = gb_gpio_set;
> + gpio->set_rv = gb_gpio_set;
> gpio->set_config = gb_gpio_set_config;
> gpio->base = -1; /* Allocate base dynamically */
> gpio->ngpio = ggc->line_max + 1;
>
> ---
> base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
> change-id: 20250331-gpiochip-set-rv-greybus-cd2365755186
>
> Best regards,
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] staging: greybus: use new GPIO line value setter callbacks
2025-04-07 13:49 ` Alex Elder
@ 2025-04-07 14:03 ` Rui Miguel Silva
0 siblings, 0 replies; 3+ messages in thread
From: Rui Miguel Silva @ 2025-04-07 14:03 UTC (permalink / raw)
To: Alex Elder, Bartosz Golaszewski, Rui Miguel Silva, Johan Hovold,
Alex Elder, Greg Kroah-Hartman, Linus Walleij
Cc: greybus-dev, linux-staging, linux-kernel, linux-gpio,
Bartosz Golaszewski
Hi Bartosz,
Thanks for the patch.
On Mon Apr 7, 2025 at 2:49 PM WEST, Alex Elder wrote:
> On 4/7/25 2:14 AM, Bartosz Golaszewski wrote:
>> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>>
>> struct gpio_chip now has callbacks for setting line values that return
>> an integer, allowing to indicate failures. Convert the driver to using
>> them.
>>
>> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
>
> Here is the commit that enabled these:
> 98ce1eb1fd87e gpiolib: introduce gpio_chip setters that return values
>
> This looks good. Thank you.
>
> Reviewed-by: Alex Elder <elder@riscstar.com>
Agree with Alex.
LGTM.
Reviewed-by: Rui Miguel Silva <rui.silva@linaro.org>
Cheers,
Rui
>
>> ---
>> drivers/staging/greybus/gpio.c | 16 +++++++++-------
>> 1 file changed, 9 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/staging/greybus/gpio.c b/drivers/staging/greybus/gpio.c
>> index 16bcf7fc8158..f81c34160f72 100644
>> --- a/drivers/staging/greybus/gpio.c
>> +++ b/drivers/staging/greybus/gpio.c
>> @@ -185,8 +185,8 @@ static int gb_gpio_get_value_operation(struct gb_gpio_controller *ggc,
>> return 0;
>> }
>>
>> -static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
>> - u8 which, bool value_high)
>> +static int gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
>> + u8 which, bool value_high)
>> {
>> struct device *dev = &ggc->gbphy_dev->dev;
>> struct gb_gpio_set_value_request request;
>> @@ -195,7 +195,7 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
>> if (ggc->lines[which].direction == 1) {
>> dev_warn(dev, "refusing to set value of input gpio %u\n",
>> which);
>> - return;
>> + return -EPERM;
>> }
>>
>> request.which = which;
>> @@ -204,10 +204,12 @@ static void gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
>> &request, sizeof(request), NULL, 0);
>> if (ret) {
>> dev_err(dev, "failed to set value of gpio %u\n", which);
>> - return;
>> + return ret;
>> }
>>
>> ggc->lines[which].value = request.value;
>> +
>> + return 0;
>> }
>>
>> static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc,
>> @@ -457,11 +459,11 @@ static int gb_gpio_get(struct gpio_chip *chip, unsigned int offset)
>> return ggc->lines[which].value;
>> }
>>
>> -static void gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
>> +static int gb_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
>> {
>> struct gb_gpio_controller *ggc = gpiochip_get_data(chip);
>>
>> - gb_gpio_set_value_operation(ggc, (u8)offset, !!value);
>> + return gb_gpio_set_value_operation(ggc, (u8)offset, !!value);
>> }
>>
>> static int gb_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
>> @@ -555,7 +557,7 @@ static int gb_gpio_probe(struct gbphy_device *gbphy_dev,
>> gpio->direction_input = gb_gpio_direction_input;
>> gpio->direction_output = gb_gpio_direction_output;
>> gpio->get = gb_gpio_get;
>> - gpio->set = gb_gpio_set;
>> + gpio->set_rv = gb_gpio_set;
>> gpio->set_config = gb_gpio_set_config;
>> gpio->base = -1; /* Allocate base dynamically */
>> gpio->ngpio = ggc->line_max + 1;
>>
>> ---
>> base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
>> change-id: 20250331-gpiochip-set-rv-greybus-cd2365755186
>>
>> Best regards,
^ permalink raw reply [flat|nested] 3+ messages in thread
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2025-04-07 7:14 [PATCH] staging: greybus: use new GPIO line value setter callbacks Bartosz Golaszewski
2025-04-07 13:49 ` Alex Elder
2025-04-07 14:03 ` Rui Miguel Silva
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