diff options
Diffstat (limited to 'drivers/mfd/db8500-prcmu.c')
-rw-r--r-- | drivers/mfd/db8500-prcmu.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c index af8e0efedbe..9baf4cd7f07 100644 --- a/drivers/mfd/db8500-prcmu.c +++ b/drivers/mfd/db8500-prcmu.c @@ -787,6 +787,38 @@ int db8500_prcmu_set_power_state(u8 state, bool keep_ulp_clk, bool keep_ap_pll) return 0; } +#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) { |