ARM: clk-imx35: Bugfix iomux clock

commit cab1e0a36c9dd0b0671fb84197ed294513f5adc1 upstream.

This patch enables iomuxc_gate clock. It is necessary to be able to
reconfigure iomux pads. Without this clock enabled, the
clk_disable_unused function will disable this clock and the iomux pads
are not configurable anymore. This happens at every boot. After a reboot
(watchdog system reset) the clock is not enabled again, so all iomux pad
reconfigurations in boot code are without effect.

The iomux pads should be always configurable, so this patch always
enables it.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Lingzhu Xiang <lxiang@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/mach-imx/clk-imx35.c b/arch/arm/mach-imx/clk-imx35.c
index 9f6ea4c043c0325692f7bf55c2f41337ba28d257..5e3ca7a10438d3cae3c25db73acfb2be61a3efee 100644 (file)
--- a/arch/arm/mach-imx/clk-imx35.c
+++ b/arch/arm/mach-imx/clk-imx35.c
@@ -266,6 +266,7 @@ int __init mx35_clocks_init()
        clk_prepare_enable(clk[iim_gate]);
        clk_prepare_enable(clk[emi_gate]);
        clk_prepare_enable(clk[max_gate]);
+       clk_prepare_enable(clk[iomuxc_gate]);
 
        /*
         * SCC is needed to boot via mmc after a watchdog reset. The clock code