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SubjectRE: [PATCH] input: keyboard: snvs_pwrkey: Add key-release-only
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> Subject: RE: [PATCH] input: keyboard: snvs_pwrkey: Add key-release-only
>
> > Subject: [PATCH] input: keyboard: snvs_pwrkey: Add key-release-only
> >
> > From: Eran Matityahu <eran.m@variscite.com>
> >
> > On imx6qdl the interrupt only triggers on the release of the key.
> > Normally, the driver is looking for a change in the state of the key,
> > but since the interrupt triggers on release the key value is always 0, so there
> was no event.
> >
> > Add "key-release-only" boolean dts property to address this issue, and
> > create both key press and key release events when the key is actually released.
> >
> > Signed-off-by: Eran Matityahu <eran.m@variscite.com>
> > Signed-off-by: mcontenti <marco.c@variscite.com>
> > Signed-off-by: Alifer Moraes <alifer.m@variscite.com>
> > ---
> > arch/arm/boot/dts/imx6qdl.dtsi | 1 +
> > drivers/input/keyboard/snvs_pwrkey.c | 21 ++++++++++++++++++++-
> > 2 files changed, 21 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/arm/boot/dts/imx6qdl.dtsi
> > b/arch/arm/boot/dts/imx6qdl.dtsi index d27beb47f9a3..9811e6bfd8e5
> > 100644
> > --- a/arch/arm/boot/dts/imx6qdl.dtsi
> > +++ b/arch/arm/boot/dts/imx6qdl.dtsi
> > @@ -845,6 +845,7 @@ snvs_pwrkey: snvs-powerkey {
> > regmap = <&snvs>;
> > interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
> > linux,keycode = <KEY_POWER>;
> > + key-release-only;
> > wakeup-source;
> > status = "disabled";
> > };
>
> dts changes should be in a separate patch.
>
> BR
> Jacky Bai
> > diff --git a/drivers/input/keyboard/snvs_pwrkey.c
> > b/drivers/input/keyboard/snvs_pwrkey.c
> > index 65286762b02a..b558e6f898fa 100644
> > --- a/drivers/input/keyboard/snvs_pwrkey.c
> > +++ b/drivers/input/keyboard/snvs_pwrkey.c
> > @@ -66,6 +66,22 @@ static void imx_imx_snvs_check_for_events(struct
> > timer_list *t)
> > }
> > }
> >
> > +static void imx_imx_snvs_check_for_release_events(struct timer_list
> > +*t) {
> > + struct pwrkey_drv_data *pdata = from_timer(pdata, t, check_timer);
> > + struct input_dev *input = pdata->input;
> > + u32 state;
> > +
> > + /* interrupt only reports release of key so do not wait for state change */
> > + state = 1;
> > + input_event(input, EV_KEY, pdata->keycode, state);
> > + input_sync(input);
> > +
> > + state = 0;
> > + input_event(input, EV_KEY, pdata->keycode, state);
> > + input_sync(input);
> > +}
> > +
> > static irqreturn_t imx_snvs_pwrkey_interrupt(int irq, void *dev_id) {
> > struct platform_device *pdev = dev_id; @@ -177,7 +193,10 @@ static
> > int imx_snvs_pwrkey_probe(struct platform_device *pdev)
> > /* clear the unexpected interrupt before driver ready */
> > regmap_write(pdata->snvs, SNVS_LPSR_REG, SNVS_LPSR_SPO);
> >
> > - timer_setup(&pdata->check_timer, imx_imx_snvs_check_for_events, 0);
> > + if (of_property_read_bool(np, "key-release-only"))

And for older imx6qdl, there is a "emulate-press" property to handle the similar issue.
Why do you need to add a new property to handle the similar thing?

BR
Jacky Bai
> > + timer_setup(&pdata->check_timer,
> > imx_imx_snvs_check_for_release_events, 0);
> > + else
> > + timer_setup(&pdata->check_timer, imx_imx_snvs_check_for_events,
> > 0);
> >
> > input = devm_input_allocate_device(&pdev->dev);
> > if (!input) {
> > --
> > 2.25.1

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