[PATCH 2/4] mmc: omap_hsmmc: Use gpio_find_by_chip_name() for omap_hsmmc_gpio_init()

* Rajendra Nayak [off-list ref] [120301 21:23]:

On Friday 02 March 2012 12:25 AM, Tony Lindgren wrote:

quoted

Use gpio_find_by_chip_name() to find the GPIO pins as they can
be dynamically allocated on various gpio_chips.

Note that we don't want to touch the platform data as it can
now specify the GPIO offset on a named gpio_chip.

This removes the need to use callbacks to set the GPIO pins
in platform data.

While one of the reasons for those callbacks was to set the GPIO
pins in platform data, I guess the other and more important one
was to make sure the init sequencing between twl4030-gpio and the
mmc device depending on it was done rightly. Doesn't this patch now
leave the sequencing to work by luck (in the absence of something
like deferred probe being in place) like is the case of twl6030 and
mmc init sequence on OMAP4 already?

Nope :) The difference is that  we can exit and produce a sensible
error to the user about the particular gpio_chip not being available.

Regards,

Tony