diff options
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/bcm/bcm2835-power.c | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/drivers/soc/bcm/bcm2835-power.c b/drivers/soc/bcm/bcm2835-power.c index 1e0041ec8132..77dc9e62b207 100644 --- a/drivers/soc/bcm/bcm2835-power.c +++ b/drivers/soc/bcm/bcm2835-power.c @@ -148,7 +148,7 @@ struct bcm2835_power { struct reset_controller_dev reset; }; -static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg) +static int bcm2835_asb_control(struct bcm2835_power *power, u32 reg, bool enable) { u64 start; @@ -158,7 +158,12 @@ static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg) start = ktime_get_ns(); /* Enable the module's async AXI bridges. */ - ASB_WRITE(reg, ASB_READ(reg) & ~ASB_REQ_STOP); + if (enable) { + ASB_WRITE(reg, ASB_READ(reg) & ~ASB_REQ_STOP); + } else { + ASB_WRITE(reg, ASB_READ(reg) | ASB_REQ_STOP); + } + while (ASB_READ(reg) & ASB_ACK) { cpu_relax(); if (ktime_get_ns() - start >= 1000) @@ -168,24 +173,14 @@ static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg) return 0; } -static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg) +static int bcm2835_asb_enable(struct bcm2835_power *power, u32 reg) { - u64 start; - - if (!reg) - return 0; - - start = ktime_get_ns(); - - /* Enable the module's async AXI bridges. */ - ASB_WRITE(reg, ASB_READ(reg) | ASB_REQ_STOP); - while (!(ASB_READ(reg) & ASB_ACK)) { - cpu_relax(); - if (ktime_get_ns() - start >= 1000) - return -ETIMEDOUT; - } + return bcm2835_asb_control(power, reg, true); +} - return 0; +static int bcm2835_asb_disable(struct bcm2835_power *power, u32 reg) +{ + return bcm2835_asb_control(power, reg, false); } static int bcm2835_power_power_off(struct bcm2835_power_domain *pd, u32 pm_reg) |