[PATCH V3 10/18] ARM: OMAP2+: Add function to read GPMC settings from device-tree

[Ezequiel Garcia]

Hi Jon,

I have some tiny nitpicks...

On Fri, Mar 15, 2013 at 10:21:08AM -0500, Jon Hunter wrote:
> Adds a function to read the various GPMC chip-select settings from
> device-tree and store them in the gpmc_settings structure.
> 
> Update the GPMC device-tree binding documentation to describe these
> options.
> 
> Signed-off-by: Jon Hunter <jon-hunter at ti.com>
> ---
>  Documentation/devicetree/bindings/bus/ti-gpmc.txt |   23 ++++++++++
>  arch/arm/mach-omap2/gpmc.c                        |   49 +++++++++++++++++++++
>  arch/arm/mach-omap2/gpmc.h                        |    2 +
>  3 files changed, 74 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/bus/ti-gpmc.txt b/Documentation/devicetree/bindings/bus/ti-gpmc.txt
> index 5ddb2e9..6fde1cf 100644
> --- a/Documentation/devicetree/bindings/bus/ti-gpmc.txt
> +++ b/Documentation/devicetree/bindings/bus/ti-gpmc.txt
> @@ -65,6 +65,29 @@ The following are only applicable to OMAP3+ and AM335x:
>   - gpmc,wr-access
>   - gpmc,wr-data-mux-bus
>  
> +GPMC chip-select settings properties for child nodes. All are optional.
> +
> +- gpmc,burst-length	Page/burst length. Must be 4, 8 or 16.
> +- gpmc,burst-wrap	Enables wrap bursting
> +- gpmc,burst-read	Enables read page/burst mode
> +- gpmc,burst-write	Enables write page/burst mode
> +- gpmc,device-nand	Device is NAND
> +- gpmc,device-width	Total width of device(s) connected to a GPMC
> +			chip-select in bytes. The GPMC supports 8-bit
> +			and 16-bit devices and so this property must be
> +			1 or 2.
> +- gpmc,mux-add-data	Address and data multiplexing configuration.
> +			Valid values are 1 for address-address-data
> +			multiplexing mode and 2 for address-data
> +			multiplexing mode.
> +- gpmc,sync-read	Enables synchronous read. Defaults to asynchronous
> +			is this is not set.
> +- gpmc,sync-write	Enables synchronous writes. Defaults to asynchronous
> +			is this is not set.
> +- gpmc,wait-pin		Wait-pin used by client. Must be less than
> +			"gpmc,num-waitpins".
> +- gpmc,wait-on-read	Enables wait monitoring on reads.
> +- gpmc,wait-on-write	Enables wait monitoring on writes.
>  
>  Example for an AM33xx board:
>  
> diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
> index 3ec1937..1e7eef3 100644
> --- a/arch/arm/mach-omap2/gpmc.c
> +++ b/arch/arm/mach-omap2/gpmc.c
> @@ -1190,6 +1190,55 @@ static struct of_device_id gpmc_dt_ids[] = {
>  };
>  MODULE_DEVICE_TABLE(of, gpmc_dt_ids);
>  
> +/**
> + * gpmc_read_settings_dt - read gpmc settings from device-tree
> + * @np:		pointer to device-tree node for a gpmc child device
> + * @p:		pointer to gpmc settings structure
> + *
> + * Reads the GPMC settings for a GPMC child device from device-tree and
> + * stores them in the GPMC settings structure passed. The GPMC settings
> + * structure is initialise to zero by this function and so any previously

s/initialise/initialized ?

> + * stored settings will be clearer.

s/clearer/cleared ?

I'm not an english native speaker,
so please bare with me if I'm wrong on these...

-- 
Ezequiel García, Free Electrons
Embedded Linux, Kernel and Android Engineering
http://free-electrons.com