From: Tomi Valkeinen Date: Fri, 12 Dec 2008 07:48:53 +0000 (+0200) Subject: OMAP: wait for pwrdm transition after clk_enable() X-Git-Tag: Release-2010-05/1~2^2~171 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5895f72e1551762f53e33b9c78d73f8d76b699e2;p=pandora-kernel.git OMAP: wait for pwrdm transition after clk_enable() Enabling clock in a disabled power domain causes the power domain to be turned on. However, the power transition is not always finished when clk_enable() returns and this randomly crashes the kernel when an interrupt happens right after the clk_enable, and the kernel tries to read the irq status register for that domain. Why the irq status register is inaccessible, I don't know. Also it doesn't seem to be related to the module being not powered up, but to the transition itself. The same could perhaps happen after clk_disable also, but I have not witnessed that. The problem affects at least dss, cam and sgx clocks. This change waits for the transition to be finished before returning from omap2_clkdm_clk_enable(). Signed-off-by: Tomi Valkeinen Acked-by: Paul Walmsley Signed-off-by: Tony Lindgren --- Reading git-diff-tree failed