@@ -29,6 +29,11 @@
#include "pm.h"
+#define GRF_UOC0_CON0 0x320
+#define GRF_UOC1_CON0 0x334
+#define GRF_UOC2_CON0 0x348
+#define GRF_SIDDQ BIT(13)
+
/* These enum are option of low power mode */
enum {
ROCKCHIP_ARM_OFF_LOGIC_NORMAL = 0,
@@ -45,6 +50,7 @@ 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;
@@ -66,9 +72,29 @@ static void rk3288_config_bootdata(void)
rkpm_bootdata_l2ctlr = rk3288_l2_config();
}
+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], ®);
+ if (!(reg & GRF_SIDDQ))
+ return false;
+ }
+
+ return true;
+}
+
static void rk3288_slp_mode_set(int level)
{
- u32 mode_set, mode_set1;
+ u32 mode_set, mode_set1, osc_switch_to_32k;
+
+ osc_switch_to_32k = rk3288_slp_disable_osc();
regmap_read(sgrf_regmap, RK3288_SGRF_SOC_CON0, &rk3288_sgrf_soc_con0);
@@ -107,11 +133,13 @@ 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_switch_to_32k)
+ 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);
} else {
If we want to wake up system via usb, the 24Mhz osc could not be disabled during suspend, read the usb phy SIDDQ bit to decide whether to switch to 32khz clock-in. Signed-off-by: Chris Zhong <zyw@rock-chips.com> --- arch/arm/mach-rockchip/pm.c | 34 +++++++++++++++++++++++++++++++--- 1 file changed, 31 insertions(+), 3 deletions(-)