[PATCH] device-tree: nexus7-flo: Remove power gpio key entry and use pmic8xxx-pwrkey

[PATCH] device-tree: nexus7-flo: Remove power gpio key entry and use pmic8xxx-pwrkey

[John Stultz]

Since the pmic8xxx-pwrkey driver is already supported in the
qcom-apq8064.dtsi, and the pmic8xxx-pwrkey supports logic to
configure proper device shutdown when ps_hold goes low, it is
better to use that driver then a generic gpio button.

Thus this patch remove the gpio power key entry here, so we
don't get double input events from having two drivers enabled.

The one gotcha with the pmic8xxx-pwrkey is it has a fairly
long debounce delay, which we shorten here to make the button
behave as expected.

Cc: Rob Herring <robh+dt@kernel.org>
Cc: Arnd Bergmann <arnd.bergmann@linaro.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Andy Gross <agross@codeaurora.org>
Cc: Vinay Simha BN <simhavcs@gmail.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
index c535b3f..7ac1c65 100644
--- a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
+++ b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
@@ -29,12 +29,6 @@
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		power {
-			label = "Power";
-			gpios = <&tlmm_pinmux 26 GPIO_ACTIVE_LOW>;
-			linux,code = <KEY_POWER>;
-			gpio-key,wakeup;
-		};
 		volume_up {
 			label = "Volume Up";
 			gpios = <&pm8921_gpio 4 GPIO_ACTIVE_HIGH>;
@@ -190,6 +184,15 @@
 			};
 		};
 
+		/* override default debounce for power-key */
+		qcom,ssbi@500000 {
+			pmic@0 {
+				pwrkey@1c {
+					debounce = <1>;
+				};
+			};
+		};
+
 		gsbi@16200000 {
 			status = "okay";
 			qcom,mode = <GSBI_PROT_I2C>;
-- 
1.9.1

Re: [PATCH] device-tree: nexus7-flo: Remove power gpio key entry and use pmic8xxx-pwrkey

[Sudeep Holla]

On 13/04/16 18:16, John Stultz wrote:
> Since the pmic8xxx-pwrkey driver is already supported in the
> qcom-apq8064.dtsi, and the pmic8xxx-pwrkey supports logic to
> configure proper device shutdown when ps_hold goes low, it is
> better to use that driver then a generic gpio button.
>
> Thus this patch remove the gpio power key entry here, so we
> don't get double input events from having two drivers enabled.
>
> The one gotcha with the pmic8xxx-pwrkey is it has a fairly
> long debounce delay, which we shorten here to make the button
> behave as expected.
>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Arnd Bergmann <arnd.bergmann@linaro.org>
> Cc: Pawel Moll <pawel.moll@arm.com>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
> Cc: Kumar Gala <galak@codeaurora.org>
> Cc: Andy Gross <agross@codeaurora.org>
> Cc: Vinay Simha BN <simhavcs@gmail.com>
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Cc: Stephen Boyd <stephen.boyd@linaro.org>
> Cc: linux-arm-msm@vger.kernel.org
> Cc: devicetree@vger.kernel.org
> Signed-off-by: John Stultz <john.stultz@linaro.org>
> ---
>   arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts | 15 +++++++++------
>   1 file changed, 9 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
> index c535b3f..7ac1c65 100644
> --- a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
> +++ b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
> @@ -29,12 +29,6 @@
>
>   	gpio-keys {
>   		compatible = "gpio-keys";
> -		power {
> -			label = "Power";
> -			gpios = <&tlmm_pinmux 26 GPIO_ACTIVE_LOW>;
> -			linux,code = <KEY_POWER>;
> -			gpio-key,wakeup;

You are dropping wakeup with this change. Is that intentional ?

If not, while you are at this, replace it with "wakeup-source"
which is standard binding.

If yes, then it solves the problem :). I had a patch to replace it, but
was waiting to check if any new files in linux-next before posting. For
now, this is the only legacy entry.

-- 
Regards,
Sudeep

Re: [PATCH] device-tree: nexus7-flo: Remove power gpio key entry and use pmic8xxx-pwrkey

[John Stultz]

On Wed, Apr 13, 2016 at 10:24 AM, Sudeep Holla <sudeep.holla-5wv7dgnIgG8@public.gmane.org> wrote:
>
>
> On 13/04/16 18:16, John Stultz wrote:
>>
>> Since the pmic8xxx-pwrkey driver is already supported in the
>> qcom-apq8064.dtsi, and the pmic8xxx-pwrkey supports logic to
>> configure proper device shutdown when ps_hold goes low, it is
>> better to use that driver then a generic gpio button.
>>
>> Thus this patch remove the gpio power key entry here, so we
>> don't get double input events from having two drivers enabled.
>>
>> The one gotcha with the pmic8xxx-pwrkey is it has a fairly
>> long debounce delay, which we shorten here to make the button
>> behave as expected.
>>
>> Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>> Cc: Arnd Bergmann <arnd.bergmann-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> Cc: Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>
>> Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
>> Cc: Ian Campbell <ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>
>> Cc: Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
>> Cc: Andy Gross <agross-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
>> Cc: Vinay Simha BN <simhavcs-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>> Cc: Bjorn Andersson <bjorn.andersson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> Cc: Stephen Boyd <stephen.boyd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> Cc: linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>> Signed-off-by: John Stultz <john.stultz-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> ---
>>   arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts | 15 +++++++++------
>>   1 file changed, 9 insertions(+), 6 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
>> b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
>> index c535b3f..7ac1c65 100644
>> --- a/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
>> +++ b/arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts
>> @@ -29,12 +29,6 @@
>>
>>         gpio-keys {
>>                 compatible = "gpio-keys";
>> -               power {
>> -                       label = "Power";
>> -                       gpios = <&tlmm_pinmux 26 GPIO_ACTIVE_LOW>;
>> -                       linux,code = <KEY_POWER>;
>> -                       gpio-key,wakeup;
>
>
> You are dropping wakeup with this change. Is that intentional ?
>
> If not, while you are at this, replace it with "wakeup-source"
> which is standard binding.

Thanks for catching this. Its not intentional, but I don't have
suspend/resume working yet on the n7 so I've never really tested it.

I'll add wakeup-source to the pwrkey entry for the next version.

thanks
-john
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