[ARM] 3230/1: Sharp Scoop: Fix Shared Power Control Issues
Patch from Richard Purdie
The SL-Cxx00 devices have a power control register in SCOOP that is
shared by both CF and MMC/SD card slots. The CF reset code was resetting
this register leading to various lockups as the MMC power was suddenly
lost. This patch handles the CPR register in a more sensitive manner.
It also removes some unneeded collie specific calls as the reset code
handles this.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-pxa/spitz.c b/arch/arm/mach-pxa/spitz.c
index 5d34abc..f2007db 100644
--- a/arch/arm/mach-pxa/spitz.c
+++ b/arch/arm/mach-pxa/spitz.c
@@ -127,10 +127,12 @@
cpr &= ~0x0002;
if (device == SPITZ_PWR_SD)
cpr &= ~0x0004;
- write_scoop_reg(&spitzscoop_device.dev, SCOOP_CPR, cpr | new_cpr);
if (!(cpr & 0x0002) && !(cpr & 0x0004)) {
+ write_scoop_reg(&spitzscoop_device.dev, SCOOP_CPR, 0x0000);
mdelay(1);
reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CF_POWER);
+ } else {
+ write_scoop_reg(&spitzscoop_device.dev, SCOOP_CPR, cpr | new_cpr);
}
}
}