From: Tarun Kanti DebBarma Date: Mon, 30 Apr 2012 07:20:12 +0000 (+0530) Subject: gpio/omap: fix incorrect initialization of omap_gpio_mod_init X-Git-Tag: v3.4-rc7~7^2 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6edd94db250038c8fdf176f23ca4017d2f312509;p=pandora-kernel.git gpio/omap: fix incorrect initialization of omap_gpio_mod_init Initialization of irqenable, irqstatus registers is the common operation done in this function for all OMAP platforms, viz. OMAP1, OMAP2+. The latter _gpio_rmw()'s which supposedly got introduced wrongly to take care of OMAP2+ platforms were overwriting initially programmed OMAP1 value breaking functionality on OMAP1. Somehow incorrect assumption was made that each _gpio_rmw()'s were mutually exclusive. On close observation it is found that the first _gpio_rmw() which is supposedly done to take care of OMAP1 platform is generic enough and takes care of OMAP2+ platform as well. Therefore remove the latter _gpio_rmw() to irqenable as they are redundant now. Writing to ctrl and debounce_en registers for OMAP2+ platforms are modified to match the original(pre-cleanup) code where the registers are initialized with 0. In the cleanup series since we are using _gpio_rmw(reg, 0, 1), instead of __raw_writel(), we are just reading and writing the same values to ctrl and debounce_en. This is not an issue for debounce_en register because it has 0x0 as the default value. But in the case of ctrl register the default value is 0x2 (GATINGRATIO = 0x1) so that we end up writing 0x2 instead of intended 0 value. Therefore changing back to __raw_writel() as this is sufficient for this case besides simpler to understand. Also, change irqstatus initalization logic that avoids comparison with bool, besides making it fit in a single line. Cc: stable@vger.kernel.org Cc: Tony Lindgren Cc: Kevin Hilman Cc: Santosh Shilimkar Cc: Grant Likely Reported-by: Janusz Krzysztofik Tested-by: Janusz Krzysztofik Signed-off-by: Tarun Kanti DebBarma Signed-off-by: Kevin Hilman --- Reading git-diff-tree failed