Hi Ondrej,
On Mon, Oct 28, 2019 at 11:15:02PM +0100, Ondrej Jirman wrote:
> Allow the driver to wakeup the system on key press.
>
> Signed-off-by: Ondrej Jirman <megous@xxxxxxxxxx>
> ---
> drivers/input/keyboard/sun4i-lradc-keys.c | 22 ++++++++++++++++++----
> 1 file changed, 18 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/input/keyboard/sun4i-lradc-keys.c b/drivers/input/keyboard/sun4i-lradc-keys.c
> index 4a796bed48ac..bba679d7b54b 100644
> --- a/drivers/input/keyboard/sun4i-lradc-keys.c
> +++ b/drivers/input/keyboard/sun4i-lradc-keys.c
> @@ -22,6 +22,8 @@
> #include <linux/module.h>
> #include <linux/of_platform.h>
> #include <linux/platform_device.h>
> +#include <linux/pm_wakeirq.h>
> +#include <linux/pm_wakeup.h>
> #include <linux/regulator/consumer.h>
> #include <linux/slab.h>
>
> @@ -226,8 +228,7 @@ static int sun4i_lradc_probe(struct platform_device *pdev)
> {
> struct sun4i_lradc_data *lradc;
> struct device *dev = &pdev->dev;
> - int i;
> - int error;
> + int i, error, irq;
>
> lradc = devm_kzalloc(dev, sizeof(struct sun4i_lradc_data), GFP_KERNEL);
> if (!lradc)
> @@ -272,8 +273,13 @@ static int sun4i_lradc_probe(struct platform_device *pdev)
> if (IS_ERR(lradc->base))
> return PTR_ERR(lradc->base);
>
> - error = devm_request_irq(dev, platform_get_irq(pdev, 0),
> - sun4i_lradc_irq, 0,
> + irq = platform_get_irq(pdev, 0);
> + if (irq < 0) {
> + dev_err(&pdev->dev, "Failed to get IRQ\n");
> + return irq;
> + }
> +
> + error = devm_request_irq(dev, irq, sun4i_lradc_irq, 0,
> "sun4i-a10-lradc-keys", lradc);
> if (error)
> return error;
> @@ -282,6 +288,14 @@ static int sun4i_lradc_probe(struct platform_device *pdev)
> if (error)
> return error;
>
> + device_init_wakeup(dev, true);
I do not think we want to do this unconditionally. Can we maybe key off
"wakeup-source" device property.
> +
> + error = dev_pm_set_wake_irq(dev, irq);
> + if (error) {
> + dev_err(dev, "Could not set wake IRQ\n");
> + return error;
> + }
> +
I wonder if we could teach platform driver core to handle this for us.
Thanks.
--
Dmitry
