Two interrupts are raised on resume from LP1 on Tegra30+: first is the clock change completed interrupt which is set after updating timing configuration, second is DLL alarm interrupt which is set when DLL starts re-calibration after being reset. Clear these two interrupts in the end of exiting from the self-refresh mode for consistency, that will also allow to not receive spurious interrupts in the EMC driver after resume from suspend.
Signed-off-by: Dmitry Osipenko <[email protected]> --- arch/arm/mach-tegra/sleep-tegra30.S | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S index 828f6c37afde..78c6e9fb56e7 100644 --- a/arch/arm/mach-tegra/sleep-tegra30.S +++ b/arch/arm/mach-tegra/sleep-tegra30.S @@ -26,6 +26,7 @@ #include "irammap.h" #include "sleep.h" +#define EMC_INTSTATUS 0x0 #define EMC_CFG 0xc #define EMC_ADR_CFG 0x10 #define EMC_TIMING_CONTROL 0x28 @@ -44,6 +45,9 @@ #define EMC_XM2VTTGENPADCTRL 0x310 #define EMC_XM2VTTGENPADCTRL2 0x314 +#define EMC_CLKCHANGE_COMPLETE_INT (1 << 4) +#define EMC_DLL_ALARM_INT (1 << 7) + #define MC_EMEM_ARB_CFG 0x90 #define PMC_CTRL 0x0 @@ -539,6 +543,9 @@ zcal_done: emc_timing_update r1, r0 + mov r1, #(EMC_CLKCHANGE_COMPLETE_INT | EMC_DLL_ALARM_INT) + str r1, [r0, #EMC_INTSTATUS] @ clear interrupts + /* Tegra114 had dual EMC channel, now config the other one */ cmp r10, #TEGRA114 bne __no_dual_emc_chanl -- 2.18.0
