Thomas Zimmermann writes:
> Hi
>
> Am 10.07.25 um 12:24 schrieb Javier Martinez Canillas:
>> Some Sitronix LCD controllers (such as the ST7567) don't have a reset pin,
>> so lets relax this in the driver and make the reset GPIO to be optional.
>>
>> The devm_gpiod_get_optional() helper is similar
Thomas Zimmermann writes:
Hello Thomas,
> Hi
>
> Am 10.07.25 um 12:24 schrieb Javier Martinez Canillas:
>> Some Sitronix LCD controllers (such as the ST7567) don't have a reset pin,
>> so lets relax this in the driver and make the reset GPIO to be optional.
>>
>> The devm_gpiod_get_optional() he
Hi
Am 10.07.25 um 12:24 schrieb Javier Martinez Canillas:
Some Sitronix LCD controllers (such as the ST7567) don't have a reset pin,
so lets relax this in the driver and make the reset GPIO to be optional.
The devm_gpiod_get_optional() helper is similar to devm_gpiod_get(), but
returns NULL whe
Hi
Am 10.07.25 um 12:24 schrieb Javier Martinez Canillas:
Some Sitronix LCD controllers (such as the ST7567) don't have a reset pin,
so lets relax this in the driver and make the reset GPIO to be optional.
The devm_gpiod_get_optional() helper is similar to devm_gpiod_get(), but
returns NULL whe
Marcus Folkesson writes:
Hello Marcus,
> Hello Javier,
>
> On Thu, Jul 10, 2025 at 01:00:41PM +0200, Javier Martinez Canillas wrote:
>> >
>> > devm_gpiod_get_optional() returns -ENOENT when the GPIO is not found,
>> > and that is no error we want to propagage upwards.
>> >
>> > Maybe something l
Hello Javier,
On Thu, Jul 10, 2025 at 01:00:41PM +0200, Javier Martinez Canillas wrote:
> >
> > devm_gpiod_get_optional() returns -ENOENT when the GPIO is not found,
> > and that is no error we want to propagage upwards.
> >
> > Maybe something like this instead:
> > if (IS_ERR(st7571->reset) && I
Marcus Folkesson writes:
Hello Marcus,
Thanks for your feedback.
> On Thu, Jul 10, 2025 at 12:24:34PM +0200, Javier Martinez Canillas wrote:
>> Some Sitronix LCD controllers (such as the ST7567) don't have a reset pin,
>> so lets relax this in the driver and make the reset GPIO to be optional.
On Thu, Jul 10, 2025 at 12:24:34PM +0200, Javier Martinez Canillas wrote:
> Some Sitronix LCD controllers (such as the ST7567) don't have a reset pin,
> so lets relax this in the driver and make the reset GPIO to be optional.
>
> The devm_gpiod_get_optional() helper is similar to devm_gpiod_get(),
Some Sitronix LCD controllers (such as the ST7567) don't have a reset pin,
so lets relax this in the driver and make the reset GPIO to be optional.
The devm_gpiod_get_optional() helper is similar to devm_gpiod_get(), but
returns NULL when there isn't a reset-gpios property defined in a DT node.
T
