diff options
| -rw-r--r-- | drivers/media/i2c/rdacm20.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/media/i2c/rdacm20.c b/drivers/media/i2c/rdacm20.c index 0fc5512cd5e7..025a610de893 100644 --- a/drivers/media/i2c/rdacm20.c +++ b/drivers/media/i2c/rdacm20.c @@ -473,6 +473,19 @@ static int rdacm20_initialize(struct rdacm20_device *dev) if (ret) return ret; + /* + * Hold OV10635 in reset during max9271 configuration. The reset signal + * has to be asserted for at least 200 microseconds. + */ + ret = max9271_enable_gpios(&dev->serializer, MAX9271_GPIO1OUT); + if (ret) + return ret; + + ret = max9271_clear_gpios(&dev->serializer, MAX9271_GPIO1OUT); + if (ret) + return ret; + usleep_range(200, 500); + ret = max9271_configure_gmsl_link(&dev->serializer); if (ret) return ret; @@ -487,22 +500,14 @@ static int rdacm20_initialize(struct rdacm20_device *dev) dev->serializer.client->addr = dev->addrs[0]; /* - * Reset the sensor by cycling the OV10635 reset signal connected to the - * MAX9271 GPIO1 and verify communication with the OV10635. + * Release ov10635 from reset and initialize it. The image sensor + * requires at least 2048 XVCLK cycles (85 micro-seconds at 24MHz) + * before being available. Stay safe and wait up to 500 micro-seconds. */ - ret = max9271_enable_gpios(&dev->serializer, MAX9271_GPIO1OUT); - if (ret) - return ret; - - ret = max9271_clear_gpios(&dev->serializer, MAX9271_GPIO1OUT); - if (ret) - return ret; - usleep_range(10000, 15000); - ret = max9271_set_gpios(&dev->serializer, MAX9271_GPIO1OUT); if (ret) return ret; - usleep_range(10000, 15000); + usleep_range(100, 500); again: ret = ov10635_read16(dev, OV10635_PID); |