lkml.org 
[lkml]   [2013]   [Dec]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v3] gpio: better lookup method for platform GPIOs
Hi,

On Tue, Dec 03, 2013 at 12:20:11PM +0900, Alexandre Courbot wrote:
> Change the format of the platform GPIO lookup tables to make them less
> confusing and improve lookup efficiency.
>
> The previous format was a single linked-list that required to compare
> the device name and function ID of every single GPIO defined for each
> lookup. Switch that to a list of per-device tables, so that the lookup
> can be done in two steps, omitting the GPIOs that are not relevant for a
> particular device.
>
> The matching rules are now defined as follows:
> - The device name must match *exactly*, and can be NULL for GPIOs not
> assigned to a particular device,
> - If the function ID in the lookup table is NULL, the con_id argument of
> gpiod_get() will not be used for lookup. However, if it is defined, it
> must match exactly.
> - The index must always match.
>
> Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
> Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> Changes since v2:
> - Removed size member of the gpiod_lookup_table struct (thanks Heikki!)
> - Added Andy's reviewed-by
>
> Documentation/gpio/board.txt | 28 ++++++-----
> drivers/gpio/gpiolib.c | 108 +++++++++++++++++++++++--------------------
> include/linux/gpio/driver.h | 21 ++++-----
> 3 files changed, 85 insertions(+), 72 deletions(-)

Looks good. Thanks Alexandre!


--
heikki


\
 
 \ /
  Last update: 2013-12-03 12:21    [W:0.120 / U:0.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site