From: Michael Hennerich Date: Wed, 23 Apr 2008 23:32:41 +0000 (+0800) Subject: [Blackfin] arch: Prevent potential Core Hang situation X-Git-Tag: v2.6.26-rc1~1085^2~26 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a81501af19830ff43688781edad7e9c0cbd668af;p=pandora-kernel.git [Blackfin] arch: Prevent potential Core Hang situation If the new value written to the PLL_CTL or VR_CTL register is the same as the previous value, the PLL wake-up will occur immediately (PLL is already locked), but the core and system clock will be bypassed for the PLL_LOCKCNT duration. For this interval, code will execute at the CLKIN rate instead of at the expected CCLK rate. Software should guard against this condition by comparing the current value to the new value before writing the new value. Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- Reading git-diff-tree failed