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authorFabio Estevam <festevam@gmail.com>2019-05-13 00:15:31 -0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-06-25 11:36:54 +0800
commit0278bdc9ae0687adc50eb6bf6e49d2bd70972102 (patch)
parenta40222841938bf162d11ba855a3cb8a7e0cddb57 (diff)
ARM: imx: cpuidle-imx6sx: Restrict the SW2ISO increase to i.MX6SX
commit b25af2ff7c07bd19af74e3f64ff82e2880d13d81 upstream. Since commit 1e434b703248 ("ARM: imx: update the cpu power up timing setting on i.mx6sx") some characters loss is noticed on i.MX6ULL UART as reported by Christoph Niedermaier. The intention of such commit was to increase the SW2ISO field for i.MX6SX only, but since cpuidle-imx6sx is also used on i.MX6UL/i.MX6ULL this caused unintended side effects on other SoCs. Fix this problem by keeping the original SW2ISO value for i.MX6UL/i.MX6ULL and only increase SW2ISO in the i.MX6SX case. Cc: stable@vger.kernel.org Fixes: 1e434b703248 ("ARM: imx: update the cpu power up timing setting on i.mx6sx") Reported-by: Christoph Niedermaier <cniedermaier@dh-electronics.com> Signed-off-by: Fabio Estevam <festevam@gmail.com> Tested-by: S├ębastien Szymanski <sebastien.szymanski@armadeus.com> Tested-by: Christoph Niedermaier <cniedermaier@dh-electronics.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/cpuidle-imx6sx.c b/arch/arm/mach-imx/cpuidle-imx6sx.c
index edb888ac5ad3..c6aa77dfd00a 100644
--- a/arch/arm/mach-imx/cpuidle-imx6sx.c
+++ b/arch/arm/mach-imx/cpuidle-imx6sx.c
@@ -15,6 +15,7 @@
#include "common.h"
#include "cpuidle.h"
+#include "hardware.h"
static int imx6sx_idle_finish(unsigned long val)
@@ -108,7 +109,7 @@ 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(0xf, 1);
+ imx_gpc_set_arm_power_up_timing(cpu_is_imx6sx() ? 0xf : 0x2, 1);
imx_gpc_set_arm_power_down_timing(1, 1);
return cpuidle_register(&imx6sx_cpuidle_driver, NULL);