On Thu, Aug 25, 2016 at 01:19:12PM +0200, Marcin Niestroj wrote:
> Support configuration of ext_wakeup sources. This patch makes it
> possible to enable ext_wakeup and set it's polarity, depending on board
> configuration. AM335x's dedicated PMIC (tps65217) uses ext_wakeup to
> notify about power-button presses. Handling power-button presses enables
> to recover from RTC-only power states correctly.
>
> Signed-off-by: Marcin Niestroj <m.niest...@grinn-global.com>
> ---
> Hi,
>
> This is a total reimplementation, so it is not based on any of the previos
> patch versions. This patch adds support for ext_wakeup using generic pinconf
> device-tree bindings, with one added "ti,input-polarity" custom property.
> This approach has been suggested by Tony and Grygorii in [1].
>
> Patch was developed on 4.6, rebased on 4.8-rc3, tested using chiliBoard.
>
> [1] http://www.spinics.net/lists/devicetree/msg131516.html
>
> Documentation/devicetree/bindings/rtc/rtc-omap.txt | 21 +++
> drivers/rtc/Kconfig | 1 +
> drivers/rtc/rtc-omap.c | 167
> ++++++++++++++++++++-
> 3 files changed, 181 insertions(+), 8 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-omap.txt
> b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
> index bf7d11a..5d18373 100644
> --- a/Documentation/devicetree/bindings/rtc/rtc-omap.txt
> +++ b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
> @@ -18,6 +18,18 @@ Optional properties:
> through pmic_power_en
> - clocks: Any internal or external clocks feeding in to rtc
> - clock-names: Corresponding names of the clocks
> +- pinctrl-0: a phandle pointing to the pin settings for the device
> +- pinctrl-names: should be "default"
> +
> +Optional subnodes:
> +- generic pinctrl node
> +
> +Required pinctrl subnodes properties:
> +- pins - Names of ext_wakeup pins to configure
> +
> +Optional pinctrl subnodes properties:
> +- input-enable - Enables ext_wakeup
> +- ti,input-polarity - GPIO_ACTIVE_LOW or GPIO_ACTIVE_HIGH depending board
This is not a GPIO, so don't use GPIO defines. Just make this boolean
with not present ideally being the more common case.
> Example:
>
> @@ -30,4 +42,13 @@ rtc@1c23000 {
> system-power-controller;
> clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
> clock-names = "ext-clk", "int-clk";
> +
> + pinctrl-0 = <&ext_wakeup>;
> + pinctrl-names = "default";
> +
> + ext_wakeup: ext_wakeup {
Use '-', not '_' in node names.
> + pins = "ext_wakeup0";
> + input-enable;
> + ti,input-polarity = <GPIO_ACTIVE_LOW>;
> + };
> };
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