From 0fac96ed50d1bb6a0ce8dd44b94d3643a0dc3c91 Mon Sep 17 00:00:00 2001 From: Brian Masney Date: Tue, 17 Jan 2017 04:25:01 -0500 Subject: [PATCH] staging: iio: isl29028: only set ALS scale when ALS/IR sensing is enabled isl29028_chip_init_and_power_on() calls isl29028_set_als_scale() and this is not needed until the user actually needs to take a reading from the ALS/IR sensor. This patch moves the isl29028_set_als_scale() call from isl29028_chip_init_and_power_on() to isl29028_set_als_ir_mode(). This sets the stage for faster resume times from runtime power management if the user is only querying the proximity sensor. Signed-off-by: Brian Masney Signed-off-by: Jonathan Cameron --- drivers/staging/iio/light/isl29028.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/staging/iio/light/isl29028.c b/drivers/staging/iio/light/isl29028.c index fa58d083906e..598a5a5a8641 100644 --- a/drivers/staging/iio/light/isl29028.c +++ b/drivers/staging/iio/light/isl29028.c @@ -146,11 +146,15 @@ static int isl29028_set_als_scale(struct isl29028_chip *chip, int lux_scale) static int isl29028_set_als_ir_mode(struct isl29028_chip *chip, enum isl29028_als_ir_mode mode) { - int ret = 0; + int ret; if (chip->als_ir_mode == mode) return 0; + ret = isl29028_set_als_scale(chip, chip->lux_scale); + if (ret < 0) + return ret; + switch (mode) { case ISL29028_MODE_ALS: ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, @@ -453,7 +457,7 @@ static int isl29028_chip_init_and_power_on(struct isl29028_chip *chip) return ret; } - return isl29028_set_als_scale(chip, chip->lux_scale); + return ret; } static bool isl29028_is_volatile_reg(struct device *dev, unsigned int reg) -- 2.20.1