driver: media: i2c: Fix ov23850 power up sequence

Fix ov23850 power up sequence. Add proper delays
after sensor is being powered on.

Bug 200148541

Change-Id: Id70678cdb8112ebb38b987fee0f4cfee855c1cd7
Signed-off-by: Frank Chen <frankc@nvidia.com>
Reviewed-on: http://git-master/r/1014283
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Chinniah Poosapadi <cpoosapadi@nvidia.com>
Tested-by: Chinniah Poosapadi <cpoosapadi@nvidia.com>
Reviewed-by: Kai Lee <kailee@nvidia.com>
Reviewed-by: Wenjia Zhou <wenjiaz@nvidia.com>
Reviewed-by: Jihoon Bang <jbang@nvidia.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/media/i2c/ov23850.c b/drivers/media/i2c/ov23850.c
index 1b32dfbfc..6170dc80e 100644
--- a/drivers/media/i2c/ov23850.c
+++ b/drivers/media/i2c/ov23850.c
@@ -1,7 +1,7 @@
 /*
  * ov23850.c - ov23850 sensor driver
  *
- * Copyright (c) 2013-2015, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2013-2016, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -341,13 +341,12 @@ static int ov23850_power_on(struct camera_common_data *s_data)
         if (err)
                 goto ov23850_vcmvdd_fail;
 
-        usleep_range(1, 2);
         if (pw->reset_gpio)
                 gpio_set_value(pw->reset_gpio, 1);
         if (pw->pwdn_gpio)
                 gpio_set_value(pw->pwdn_gpio, 1);
 
-        usleep_range(300, 310);
+        usleep_range(5350, 5360);       /* 5ms + 8192 EXTCLK cycles */
 
         pw->state = SWITCH_ON;
         return 0;