diff options
Diffstat (limited to 'drivers/mfd/arizona-core.c')
| -rw-r--r-- | drivers/mfd/arizona-core.c | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c index 83f1c5a516d9..5f1e37d23943 100644 --- a/drivers/mfd/arizona-core.c +++ b/drivers/mfd/arizona-core.c @@ -24,6 +24,7 @@ #include <linux/regulator/consumer.h> #include <linux/regulator/machine.h> #include <linux/slab.h> +#include <linux/ktime.h> #include <linux/platform_device.h> #include <linux/mfd/arizona/core.h> @@ -236,22 +237,39 @@ static irqreturn_t arizona_overclocked(int irq, void *data) #define ARIZONA_REG_POLL_DELAY_US 7500 +static inline bool arizona_poll_reg_delay(ktime_t timeout) +{ + if (ktime_compare(ktime_get(), timeout) > 0) + return false; + + usleep_range(ARIZONA_REG_POLL_DELAY_US / 2, ARIZONA_REG_POLL_DELAY_US); + + return true; +} + static int arizona_poll_reg(struct arizona *arizona, int timeout_ms, unsigned int reg, unsigned int mask, unsigned int target) { + ktime_t timeout = ktime_add_us(ktime_get(), timeout_ms * USEC_PER_MSEC); unsigned int val = 0; int ret; - ret = regmap_read_poll_timeout(arizona->regmap, - reg, val, ((val & mask) == target), - ARIZONA_REG_POLL_DELAY_US, - timeout_ms * 1000); - if (ret) - dev_err(arizona->dev, "Polling reg 0x%x timed out: %x\n", - reg, val); + do { + ret = regmap_read(arizona->regmap, reg, &val); - return ret; + if ((val & mask) == target) + return 0; + } while (arizona_poll_reg_delay(timeout)); + + if (ret) { + dev_err(arizona->dev, "Failed polling reg 0x%x: %d\n", + reg, ret); + return ret; + } + + dev_err(arizona->dev, "Polling reg 0x%x timed out: %x\n", reg, val); + return -ETIMEDOUT; } static int arizona_wait_for_boot(struct arizona *arizona) |