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SubjectRe: [PATCH v2] extcon: gpio: Add the support for Device tree bindings
> 
> This patch adds the support for Device tree bindings of extcon-gpio driver.
> The extcon-gpio device tree node must include the both 'extcon-id' and
> 'extcon-gpio' property.
>
[]
>
> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>


Except for some beautification issues described below,

Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>

> ---
> This patch is based on following patch[1].
> [1] https://lkml.org/lkml/2015/10/3/304
>
> Changes from v1:
> - Create the include/dt-bindings/extcon/extcon.h including the identification
> of external connector. These definitions are used in dts file.
> - Fix error if CONFIG_OF is disabled.
>
> .../devicetree/bindings/extcon/extcon-gpio.txt | 38 +++++++
> drivers/extcon/extcon-gpio.c | 110 ++++++++++++++++-----
> include/dt-bindings/extcon/extcon.h | 44 +++++++++
> include/linux/extcon/extcon-gpio.h | 6 +-
> 4 files changed, 173 insertions(+), 25 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/extcon/extcon-gpio.txt
> create mode 100644 include/dt-bindings/extcon/extcon.h
>
> diff --git a/Documentation/devicetree/bindings/extcon/extcon-gpio.txt b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
> new file mode 100644
> index 000000000000..70c36f729963
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/extcon/extcon-gpio.txt
[]
> diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
> index 279ff8f6637d..7f3e24aae0c4 100644
> --- a/drivers/extcon/extcon-gpio.c
> +++ b/drivers/extcon/extcon-gpio.c
> @@ -1,8 +1,8 @@
> /*
> * extcon_gpio.c - Single-state GPIO extcon driver based on extcon class
> *
> - * Copyright (C) 2008 Google, Inc.
> - * Author: Mike Lockwood <lockwood@android.com>
> + * Copyright (C) 2015 Chanwoo Choi <cw00.choi@samsung.com>, Samsung Electronics
> + * Copyright (C) 2008 Mike Lockwood <lockwood@android.com>, Google, Inc.
> *
> * Modified by MyungJoo Ham <myungjoo.ham@samsung.com> to support extcon
> * (originally switch class is supported)

Let's make it in chronological order.
(may need to "beautify the last two lines as well)

I.e., 2008-->2012-->2015 or 2015-->2012-->2008.
Not 2015-->2008-->2012


> @@ -26,12 +26,14 @@
[]
> diff --git a/include/dt-bindings/extcon/extcon.h b/include/dt-bindings/extcon/extcon.h
> new file mode 100644
> index 000000000000..14c7f36b2206
> --- /dev/null
> +++ b/include/dt-bindings/extcon/extcon.h
[]
> diff --git a/include/linux/extcon/extcon-gpio.h b/include/linux/extcon/extcon-gpio.h
> index 7cacafb78b09..bcc6d7f7116a 100644
> --- a/include/linux/extcon/extcon-gpio.h
> +++ b/include/linux/extcon/extcon-gpio.h
[]
> @@ -38,7 +38,7 @@ struct gpio_extcon_pdata {
> unsigned int extcon_id;
> unsigned gpio;
> bool gpio_active_low;
> - unsigned long debounce;
> + unsigned int debounce;

What about u32, making it more clear?
( > + device_property_read_u32(dev, "debounce-ms", &pdata->debounce); )

> unsigned long irq_flags;
>
> bool check_on_resume;
> --
> 1.8.0
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