[RFC PATCH 2/3] OMAP: omap_device: Add a DT parser for multiple strings
Cousson, Benoit
b-cousson at ti.com
Fri Sep 2 11:32:52 EDT 2011
On 9/1/2011 8:38 PM, Hilman, Kevin wrote:
> Benoit Cousson<b-cousson at ti.com> 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<b-cousson at ti.com>
>> Cc: Kevin Hilman<khilman at ti.com>
>
> These should just be folded into 3/3 where they are used (with a comment
> changelog of course.)
I did that because I was hoping to generalize them or to remove them if
something better become available in DT core. And it seems that Stephen
Warren from nvidia introduced a generic iterator for properties:
http://www.spinics.net/lists/arm-kernel/msg138013.html
But since it is not in mainline or even in devicetree/test, I still have
to add mine for the moment.
Regards,
Benoit
>
> 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 */
More information about the linux-arm-kernel
mailing list