On 21.11.2017 21:33, Paul Burton wrote: > Allow for drivers to make use of driver model GPIOs when they're enabled > & available without needing to #ifdef on CONFIG_DM_GPIO by providing > dummy functions covering GPIO requests. Each will simply return -ENODEV > or -EINVAL, depending upon which the real implementation returns when a > GPIO isn't found. Only the driver model versions of the GPIO request > functions are covered & dm_gpio_request is excluded since it's > documented as only being of use for debugging, so drivers shouldn't be > calling it anyway. > > Also provide a dummy dm_gpio_is_valid, with the idea that all other GPIO > functions called would be within an if (dm_gpio_is_valid(...)) statement > and have been optimised out in cases where that returns a compile-time > constant false. > > This parallels the clock API, keeping the #ifdefs & checks in a single > location allowing drivers or other code to use GPIOs without needing to > perform such checks themselves. > > Signed-off-by: Paul Burton <[email protected]> > Cc: Daniel Schwierzeck <[email protected]> > Cc: Simon Glass <[email protected]> > Cc: [email protected] > Signed-off-by: Paul Burton <[email protected]> > --- > > include/asm-generic/gpio.h | 38 ++++++++++++++++++++++++++++++++++++++ > 1 file changed, 38 insertions(+) >
Reviewed-by: Daniel Schwierzeck <[email protected]> -- - Daniel
signature.asc
Description: OpenPGP digital signature
_______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
