ARM: imx: update the cpu power up timing setting on i.mx6sx

[ Upstream commit 1e434b703248580b7aaaf8a115d93e682f57d29f ]

The sw2iso count should cover ARM LDO ramp-up time,
the MAX ARM LDO ramp-up time may be up to more than
100us on some boards, this patch sets sw2iso to 0xf
(~384us) which is the reset value, and it is much
more safe to cover different boards, since we have
observed that some customer boards failed with current
setting of 0x2.

Fixes: 05136f0897b5 ("ARM: imx: support arm power off in cpuidle for i.mx6sx")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c
index 3c6672b..7f5df89 100644 (file)
--- a/arch/arm/mach-imx/cpuidle-imx6sx.c
+++ b/arch/arm/mach-imx/cpuidle-imx6sx.c
@@ -97,7 +97,7 @@ int __init imx6sx_cpuidle_init(void)
         * except for power up sw2iso which need to be
         * larger than LDO ramp up time.
         */
-       imx_gpc_set_arm_power_up_timing(2, 1);
+       imx_gpc_set_arm_power_up_timing(0xf, 1);
        imx_gpc_set_arm_power_down_timing(1, 1);
 
        return cpuidle_register(&imx6sx_cpuidle_driver, NULL);