diff options
| -rw-r--r-- | drivers/mfd/db8500-prcmu.c | 32 | ||||
| -rw-r--r-- | include/linux/mfd/db8500-prcmu.h | 2 | ||||
| -rw-r--r-- | include/linux/mfd/dbx500-prcmu.h | 16 |
3 files changed, 50 insertions, 0 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c index 128b5f4a4fb0..b320cc602668 100644 --- a/drivers/mfd/db8500-prcmu.c +++ b/drivers/mfd/db8500-prcmu.c @@ -821,6 +821,38 @@ u8 db8500_prcmu_get_power_state_result(void) return readb(tcdm_base + PRCM_ACK_MB0_AP_PWRSTTR_STATUS); } +#define PRCMU_A9_MASK_REQ 0x00000328 +#define PRCMU_A9_MASK_REQ_MASK 0x00000001 +#define PRCMU_GIC_DELAY 1 + +/* This function decouple the gic from the prcmu */ +int db8500_prcmu_gic_decouple(void) +{ + u32 val = readl(_PRCMU_BASE + PRCMU_A9_MASK_REQ); + + /* Set bit 0 register value to 1 */ + writel(val | PRCMU_A9_MASK_REQ_MASK, _PRCMU_BASE + PRCMU_A9_MASK_REQ); + + /* Make sure the register is updated */ + readl(_PRCMU_BASE + PRCMU_A9_MASK_REQ); + + /* Wait a few cycles for the gic mask completion */ + udelay(PRCMU_GIC_DELAY); + + return 0; +} + +/* This function recouple the gic with the prcmu */ +int db8500_prcmu_gic_recouple(void) +{ + u32 val = readl(_PRCMU_BASE + PRCMU_A9_MASK_REQ); + + /* Set bit 0 register value to 0 */ + writel(val & ~PRCMU_A9_MASK_REQ_MASK, _PRCMU_BASE + PRCMU_A9_MASK_REQ); + + return 0; +} + /* This function should only be called while mb0_transfer.lock is held. */ static void config_wakeups(void) { diff --git a/include/linux/mfd/db8500-prcmu.h b/include/linux/mfd/db8500-prcmu.h index 636423bd5111..cf48aa76acc3 100644 --- a/include/linux/mfd/db8500-prcmu.h +++ b/include/linux/mfd/db8500-prcmu.h @@ -580,6 +580,8 @@ int db8500_prcmu_load_a9wdog(u8 id, u32 val); void db8500_prcmu_system_reset(u16 reset_code); int db8500_prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll); u8 db8500_prcmu_get_power_state_result(void); +int db8500_prcmu_gic_decouple(void); +int db8500_prcmu_gic_recouple(void); void db8500_prcmu_enable_wakeups(u32 wakeups); int db8500_prcmu_set_epod(u16 epod_id, u8 epod_state); int db8500_prcmu_request_clock(u8 clock, bool enable); diff --git a/include/linux/mfd/dbx500-prcmu.h b/include/linux/mfd/dbx500-prcmu.h index b3b5adfa9e41..5bf5c4f0132c 100644 --- a/include/linux/mfd/dbx500-prcmu.h +++ b/include/linux/mfd/dbx500-prcmu.h @@ -281,6 +281,22 @@ static inline u8 prcmu_get_power_state_result(void) return db8500_prcmu_get_power_state_result(); } +static inline int prcmu_gic_decouple(void) +{ + if (cpu_is_u5500()) + return -EINVAL; + else + return db8500_prcmu_gic_decouple(); +} + +static inline int prcmu_gic_recouple(void) +{ + if (cpu_is_u5500()) + return -EINVAL; + else + return db8500_prcmu_gic_recouple(); +} + static inline int prcmu_set_epod(u16 epod_id, u8 epod_state) { if (cpu_is_u5500()) |