[PATCH v3 3/3] ARM: rockchip: enable PMU_GPIOINT_WAKEUP_EN when entering shallow suspend

[Heiko Stübner]

PMU_GPIOINT_WAKEUP_EN seems needed when entering the shallow suspend
(with logic staying on) but does not seem to be needed for the deep
suspend for unknown reasons.
Testing revealed that this setting really is necessary to reliably
resume the veyron devices from suspend.

Reported-by: Chris Zhong <zyw at rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko at sntech.de>
---
 arch/arm/mach-rockchip/pm.c | 9 ++++++---
 arch/arm/mach-rockchip/pm.h | 1 +
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-rockchip/pm.c b/arch/arm/mach-rockchip/pm.c
index c11a30b..156cd23 100644
--- a/arch/arm/mach-rockchip/pm.c
+++ b/arch/arm/mach-rockchip/pm.c
@@ -123,9 +123,6 @@ static void rk3288_slp_mode_set(int level)
 	regmap_write(sgrf_regmap, RK3288_SGRF_FAST_BOOT_ADDR,
 		     rk3288_bootram_phy);
 
-	regmap_write(pmu_regmap, RK3288_PMU_WAKEUP_CFG1,
-		     PMU_ARMINT_WAKEUP_EN);
-
 	mode_set = BIT(PMU_GLOBAL_INT_DISABLE) | BIT(PMU_L2FLUSH_EN) |
 		   BIT(PMU_SREF0_ENTER_EN) | BIT(PMU_SREF1_ENTER_EN) |
 		   BIT(PMU_DDR0_GATING_EN) | BIT(PMU_DDR1_GATING_EN) |
@@ -146,6 +143,9 @@ static void rk3288_slp_mode_set(int level)
 		mode_set1 |= BIT(PMU_CLR_ALIVE) | BIT(PMU_CLR_BUS) |
 			     BIT(PMU_CLR_PERI) | BIT(PMU_CLR_DMA);
 
+		regmap_write(pmu_regmap, RK3288_PMU_WAKEUP_CFG1,
+			     PMU_ARMINT_WAKEUP_EN);
+
 		/*
 		 * In deep suspend we use PMU_PMU_USE_LF to let the rk3288
 		 * switch its main clock supply to the alternative 32kHz
@@ -166,6 +166,9 @@ static void rk3288_slp_mode_set(int level)
 		 */
 		mode_set |= BIT(PMU_CLK_CORE_SRC_GATE_EN);
 
+		regmap_write(pmu_regmap, RK3288_PMU_WAKEUP_CFG1,
+			     PMU_ARMINT_WAKEUP_EN | PMU_GPIOINT_WAKEUP_EN);
+
 		/* 30ms on a 24MHz clock for pmic stabilization */
 		regmap_write(pmu_regmap, RK3288_PMU_STABL_CNT, 24000 * 30);
 
diff --git a/arch/arm/mach-rockchip/pm.h b/arch/arm/mach-rockchip/pm.h
index 8a55ee2..b5af26f 100644
--- a/arch/arm/mach-rockchip/pm.h
+++ b/arch/arm/mach-rockchip/pm.h
@@ -61,6 +61,7 @@ static inline void rockchip_suspend_init(void)
 
 /* PMU_WAKEUP_CFG1 bits */
 #define PMU_ARMINT_WAKEUP_EN		BIT(0)
+#define PMU_GPIOINT_WAKEUP_EN		BIT(3)
 
 enum rk3288_pwr_mode_con {
 	PMU_PWR_MODE_EN = 0,
-- 
2.1.4