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Diffstat (limited to 'kernel/arch/arm/mach-rockchip/pm.c')
-rw-r--r--kernel/arch/arm/mach-rockchip/pm.c78
1 files changed, 69 insertions, 9 deletions
diff --git a/kernel/arch/arm/mach-rockchip/pm.c b/kernel/arch/arm/mach-rockchip/pm.c
index b0dcbe28f..bee8c8051 100644
--- a/kernel/arch/arm/mach-rockchip/pm.c
+++ b/kernel/arch/arm/mach-rockchip/pm.c
@@ -45,9 +45,11 @@ static phys_addr_t rk3288_bootram_phy;
static struct regmap *pmu_regmap;
static struct regmap *sgrf_regmap;
+static struct regmap *grf_regmap;
static u32 rk3288_pmu_pwr_mode_con;
static u32 rk3288_sgrf_soc_con0;
+static u32 rk3288_sgrf_cpu_con0;
static inline u32 rk3288_l2_config(void)
{
@@ -66,10 +68,37 @@ static void rk3288_config_bootdata(void)
rkpm_bootdata_l2ctlr = rk3288_l2_config();
}
+#define GRF_UOC0_CON0 0x320
+#define GRF_UOC1_CON0 0x334
+#define GRF_UOC2_CON0 0x348
+#define GRF_SIDDQ BIT(13)
+
+static bool rk3288_slp_disable_osc(void)
+{
+ static const u32 reg_offset[] = { GRF_UOC0_CON0, GRF_UOC1_CON0,
+ GRF_UOC2_CON0 };
+ u32 reg, i;
+
+ /*
+ * if any usb phy is still on(GRF_SIDDQ==0), that means we need the
+ * function of usb wakeup, so do not switch to 32khz, since the usb phy
+ * clk does not connect to 32khz osc
+ */
+ for (i = 0; i < ARRAY_SIZE(reg_offset); i++) {
+ regmap_read(grf_regmap, reg_offset[i], &reg);
+ if (!(reg & GRF_SIDDQ))
+ return false;
+ }
+
+ return true;
+}
+
static void rk3288_slp_mode_set(int level)
{
u32 mode_set, mode_set1;
+ bool osc_disable = rk3288_slp_disable_osc();
+ regmap_read(sgrf_regmap, RK3288_SGRF_CPU_CON0, &rk3288_sgrf_cpu_con0);
regmap_read(sgrf_regmap, RK3288_SGRF_SOC_CON0, &rk3288_sgrf_soc_con0);
regmap_read(pmu_regmap, RK3288_PMU_PWRMODE_CON,
@@ -94,9 +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) |
@@ -107,13 +133,31 @@ static void rk3288_slp_mode_set(int level)
if (level == ROCKCHIP_ARM_OFF_LOGIC_DEEP) {
/* arm off, logic deep sleep */
- mode_set |= BIT(PMU_BUS_PD_EN) |
+ mode_set |= BIT(PMU_BUS_PD_EN) | BIT(PMU_PMU_USE_LF) |
BIT(PMU_DDR1IO_RET_EN) | BIT(PMU_DDR0IO_RET_EN) |
- BIT(PMU_OSC_24M_DIS) | BIT(PMU_PMU_USE_LF) |
BIT(PMU_ALIVE_USE_LF) | BIT(PMU_PLL_PD_EN);
+ if (osc_disable)
+ mode_set |= BIT(PMU_OSC_24M_DIS);
+
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
+ * source. Therefore set 30ms on a 32kHz clock for pmic
+ * stabilization. Similar 30ms on 24MHz for the other
+ * mode below.
+ */
+ regmap_write(pmu_regmap, RK3288_PMU_STABL_CNT, 32 * 30);
+
+ /* only wait for stabilization, if we turned the osc off */
+ regmap_write(pmu_regmap, RK3288_PMU_OSC_CNT,
+ osc_disable ? 32 * 30 : 0);
} else {
/*
* arm off, logic normal
@@ -121,6 +165,15 @@ static void rk3288_slp_mode_set(int level)
* wakeup will be error
*/
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);
+
+ /* oscillator is still running, so no need to wait */
+ regmap_write(pmu_regmap, RK3288_PMU_OSC_CNT, 0);
}
regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON, mode_set);
@@ -129,6 +182,9 @@ static void rk3288_slp_mode_set(int level)
static void rk3288_slp_mode_set_resume(void)
{
+ regmap_write(sgrf_regmap, RK3288_SGRF_CPU_CON0,
+ rk3288_sgrf_cpu_con0 | SGRF_DAPDEVICEEN_WRITE);
+
regmap_write(pmu_regmap, RK3288_PMU_PWRMODE_CON,
rk3288_pmu_pwr_mode_con);
@@ -190,7 +246,14 @@ static int rk3288_suspend_init(struct device_node *np)
"rockchip,rk3288-sgrf");
if (IS_ERR(sgrf_regmap)) {
pr_err("%s: could not find sgrf regmap\n", __func__);
- return PTR_ERR(pmu_regmap);
+ return PTR_ERR(sgrf_regmap);
+ }
+
+ grf_regmap = syscon_regmap_lookup_by_compatible(
+ "rockchip,rk3288-grf");
+ if (IS_ERR(grf_regmap)) {
+ pr_err("%s: could not find grf regmap\n", __func__);
+ return PTR_ERR(grf_regmap);
}
sram_np = of_find_compatible_node(NULL, NULL,
@@ -221,9 +284,6 @@ static int rk3288_suspend_init(struct device_node *np)
memcpy(rk3288_bootram_base, rockchip_slp_cpu_resume,
rk3288_bootram_sz);
- regmap_write(pmu_regmap, RK3288_PMU_OSC_CNT, OSC_STABL_CNT_THRESH);
- regmap_write(pmu_regmap, RK3288_PMU_STABL_CNT, PMU_STABL_CNT_THRESH);
-
return 0;
}