Subject: [RFC PATCH 2/3] OMAP: omap_device: Add a DT parser for multiple strings

From: [email-masked] (Kevin Hilman)
Date: Thu, 01 Sep 2011 11:38:22 -0700

Benoit Cousson <[email-masked]> writes:

> Add two helpers function to parse a property that contains multiple
> strings.
>
> These functions might be exported and moved to a common place if they
> can to be useful elsewhere.
>
> Signed-off-by: Benoit Cousson <[email-masked]>
> Cc: Kevin Hilman <[email-masked]>

These should just be folded into 3/3 where they are used (with a comment
changelog of course.)

Kevin

> ---
>  arch/arm/plat-omap/omap_device.c |   39 ++++++++++++++++++++++++++++++++++++++
>  1 files changed, 39 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c
> index 752d72a..70361f8 100644
> --- a/arch/arm/plat-omap/omap_device.c
> +++ b/arch/arm/plat-omap/omap_device.c
> @@ -315,6 +315,45 @@ static void _add_hwmod_clocks_clkdev(struct omap_device *od,
>  		_add_clkdev(od, oh->opt_clks[i].role, oh->opt_clks[i].clk);
>  }
>  
> +/*
> + * XXX: DT helper functions that should probably move elsewhere if
> + * they become usefull for other needs.
> + */
> +static int _dt_count_property_string(const char *prop, int len)
> +{
> +	int i = 0;
> +	size_t l = 0, total = 0;
> +
> +	if (!prop || !len)
> +		return -EINVAL;
> +
> +	for (i = 0; len >= total; total += l, prop += l) {
> +		l = strlen(prop) + 1;
> +		if (*prop != 0)
> +			i++;
> +	}
> +	return i;
> +}
> +
> +static int _dt_get_property(const char *prop, int len, int index, char *output,
> +			    int size)
> +{
> +	int i = 0;
> +	size_t l = 0, total = 0;
> +
> +	if (!prop || !len)
> +		return -EINVAL;
> +
> +	for (i = 0; len >= total; total += l, prop += l) {
> +		l = strlcpy(output, prop, size) + 1;
> +		if (*prop != 0) {
> +			if (i++ == index)
> +				return 0;
> +		}
> +	}
> +	return -ENODEV;
> +}
> +
>  
>  /* Public functions for use by core code */