diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/i2c/ccs/ccs-core.c | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/drivers/media/i2c/ccs/ccs-core.c b/drivers/media/i2c/ccs/ccs-core.c index e1b3c5693e01..fae8ceded861 100644 --- a/drivers/media/i2c/ccs/ccs-core.c +++ b/drivers/media/i2c/ccs/ccs-core.c @@ -1515,7 +1515,6 @@ static int ccs_power_on(struct device *dev) struct ccs_sensor *sensor = container_of(ssd, struct ccs_sensor, ssds[0]); const struct ccs_device *ccsdev = device_get_match_data(dev); - unsigned int sleep; int rval; rval = regulator_bulk_enable(ARRAY_SIZE(ccs_regulators), @@ -1525,21 +1524,25 @@ static int ccs_power_on(struct device *dev) return rval; } - rval = clk_prepare_enable(sensor->ext_clk); - if (rval < 0) { - dev_dbg(dev, "failed to enable xclk\n"); - goto out_xclk_fail; - } + if (sensor->reset || sensor->xshutdown || sensor->ext_clk) { + unsigned int sleep; + + rval = clk_prepare_enable(sensor->ext_clk); + if (rval < 0) { + dev_dbg(dev, "failed to enable xclk\n"); + goto out_xclk_fail; + } - gpiod_set_value(sensor->reset, 0); - gpiod_set_value(sensor->xshutdown, 1); + gpiod_set_value(sensor->reset, 0); + gpiod_set_value(sensor->xshutdown, 1); - if (ccsdev->flags & CCS_DEVICE_FLAG_IS_SMIA) - sleep = SMIAPP_RESET_DELAY(sensor->hwcfg.ext_clk); - else - sleep = 5000; + if (ccsdev->flags & CCS_DEVICE_FLAG_IS_SMIA) + sleep = SMIAPP_RESET_DELAY(sensor->hwcfg.ext_clk); + else + sleep = 5000; - usleep_range(sleep, sleep); + usleep_range(sleep, sleep); + } /* * Failures to respond to the address change command have been noticed. |