Use usleep_range and a named define, and increase from 100 to 200us
because in practice 100us turns out to be too low, particularly after
a suspend-resume cycle.
Signed-off-by: Val Packett <val@packett.cool>
---
drivers/media/i2c/dw9719.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/media/i2c/dw9719.c b/drivers/media/i2c/dw9719.c
index b6859cfd216c..f2cf3bcd4dd3 100644
--- a/drivers/media/i2c/dw9719.c
+++ b/drivers/media/i2c/dw9719.c
@@ -20,6 +20,8 @@
#define DW9719_MAX_FOCUS_POS 1023
#define DW9719_CTRL_STEPS 16
#define DW9719_CTRL_DELAY_US 1000
+/* 100 us is not enough on resume */
+#define DW9719_T_OPR_US 200
#define DW9719_INFO CCI_REG8(0)
#define DW9719_ID 0xF1
@@ -85,8 +87,8 @@ static int dw9719_power_up(struct dw9719_device *dw9719)
/* Jiggle SCL pin to wake up device */
cci_write(dw9719->regmap, DW9719_CONTROL, 1, &ret);
- /* Need 100us to transit from SHUTDOWN to STANDBY */
- fsleep(100);
+ /* Need tOPR to transition from SHUTDOWN to STANDBY */
+ usleep_range(DW9719_T_OPR_US, DW9719_T_OPR_US + 10);
cci_write(dw9719->regmap, DW9719_CONTROL, DW9719_ENABLE_RINGING, &ret);
cci_write(dw9719->regmap, DW9719_MODE,
--
2.48.1