Messages in this thread | | | Subject | Re: [PATCH] Input: gpio_keys_polled - always use gpiod_get_value_cansleep | From | Hans de Goede <> | Date | Thu, 20 Oct 2016 11:00:03 +0200 |
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Hi,
On 20-10-16 01:43, Dmitry Torokhov wrote: > On Wed, Oct 19, 2016 at 04:41:07PM -0700, Dmitry Torokhov wrote: >> It does not matter if given GPIO may sleep or not when reading state, >> polling is always done in a non-atomic context, so we should always >> be able to simply use gpiod_get_value_cansleep(). >> >> Also let's note in the logs when we fail to read gpio state. >> >> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> >> --- >> drivers/input/keyboard/gpio_keys_polled.c | 21 ++++++++++----------- >> 1 file changed, 10 insertions(+), 11 deletions(-) >> >> diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c >> index daef8ea..3c79158 100644 >> --- a/drivers/input/keyboard/gpio_keys_polled.c >> +++ b/drivers/input/keyboard/gpio_keys_polled.c >> @@ -34,7 +34,6 @@ struct gpio_keys_button_data { >> int last_state; >> int count; >> int threshold; >> - int can_sleep; >> }; >> >> struct gpio_keys_polled_dev { >> @@ -76,16 +75,17 @@ static void gpio_keys_polled_check_state(struct input_polled_dev *dev, >> { >> int state; >> >> - if (bdata->can_sleep) >> - state = !!gpiod_get_value_cansleep(bdata->gpiod); >> - else >> - state = !!gpiod_get_value(bdata->gpiod); >> - >> - gpio_keys_button_event(dev, button, state); >> + state = gpiod_get_value_cansleep(bdata->gpiod); >> + if (unlikely(state < 0)) { >> + dev_err(input->dev.parent, > > Umm, this should have been dev->input->dev.parent
With that fixed this patch looks good to me and is:
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Regards,
Hans
> >> + "failed to get gpio state: %d\n", state); >> + } else { >> + gpio_keys_button_event(dev, button, state); >> >> - if (state != bdata->last_state) { >> - bdata->count = 0; >> - bdata->last_state = state; >> + if (state != bdata->last_state) { >> + bdata->count = 0; >> + bdata->last_state = state; >> + } >> } >> } >> >> @@ -341,7 +341,6 @@ static int gpio_keys_polled_probe(struct platform_device *pdev) >> } >> } >> >> - bdata->can_sleep = gpiod_cansleep(bdata->gpiod); >> bdata->last_state = -1; >> bdata->threshold = DIV_ROUND_UP(button->debounce_interval, >> pdata->poll_interval); >> -- >> 2.8.0.rc3.226.g39d4020 >> >> >> -- >> Dmitry >
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