Re: [PATCH] Input: introduce medfield keypad driver

["Ville Syrjälä" <syrjala@sci.fi>]

On Thu, Jul 08, 2010 at 05:41:33PM +0100, Alan Cox wrote:
> From: Zheng Ba <zheng.ba@intel.com>
> 
> An i2c bus driver for the Intel Medfield keypad interface.
> 
> Signed-off-by: Zheng Ba <zheng.ba@intel.com>
> Signed-off-by: Alan Cox <alan@linux.intel.com>
> ---
> 
>  drivers/input/keyboard/Kconfig       |   10 +
>  drivers/input/keyboard/Makefile      |    1 
>  drivers/input/keyboard/mfld_keypad.c |  613 ++++++++++++++++++++++++++++++++++
>  drivers/input/keyboard/mfld_keypad.h |   56 +++
>  4 files changed, 680 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/input/keyboard/mfld_keypad.c
>  create mode 100644 drivers/input/keyboard/mfld_keypad.h
> 
> 
> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
> index 950f6d1..10cc686 100644
> --- a/drivers/input/keyboard/Kconfig
> +++ b/drivers/input/keyboard/Kconfig
> @@ -309,6 +309,16 @@ config KEYBOARD_MCS
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called mcs_touchkey.
>  
> +config KEYBOARD_MFLD
> +	tristate "Medfield I2C keypad support"
> +	depends on I2C && GPIOLIB && X86_MRST
> +	help
> +	  Say Y here if you want to get support for the keypad controller
> +	  on the Medfield (MFLD) platform of Intel MID.
> +
> +	  To compile this as a module, choose M here: the
> +	  module will be called mfld_keypad.
> +
>  config KEYBOARD_IMX
>  	tristate "IMX keypad support"
>  	depends on ARCH_MXC
> diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
> index a1f5e9d..9672c3d 100644
> --- a/drivers/input/keyboard/Makefile
> +++ b/drivers/input/keyboard/Makefile
<snip>
> +/*
> + * We cannot use I2c in interrupt context, so we just schedule work.
> + */
> +static irqreturn_t mfld_keypad_irq(int irq, void *data)
> +{
> +	struct mfld_keypad_chip *tc = data;
> +	schedule_work(&tc->work);

Use threaded irq?

> +	return IRQ_HANDLED;
> +}

-- 
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/
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