diff options
Diffstat (limited to 'drivers/media/i2c/ov5675.c')
| -rw-r--r-- | drivers/media/i2c/ov5675.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/drivers/media/i2c/ov5675.c b/drivers/media/i2c/ov5675.c index 3641911bc73f..e7aec281e9a4 100644 --- a/drivers/media/i2c/ov5675.c +++ b/drivers/media/i2c/ov5675.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2019 Intel Corporation. -#include <asm/unaligned.h> +#include <linux/unaligned.h> #include <linux/acpi.h> #include <linux/clk.h> #include <linux/delay.h> @@ -510,7 +510,7 @@ struct ov5675 { /* Current mode */ const struct ov5675_mode *cur_mode; - /* To serialize asynchronus callbacks */ + /* To serialize asynchronous callbacks */ struct mutex mutex; /* True if the device has been identified */ @@ -732,7 +732,7 @@ static int ov5675_set_ctrl(struct v4l2_ctrl *ctrl) case V4L2_CID_EXPOSURE: /* 4 least significant bits of expsoure are fractional part * val = val << 4 - * for ov5675, the unit of exposure is differnt from other + * for ov5675, the unit of exposure is different from other * OmniVision sensors, its exposure value is twice of the * register value, the exposure should be divided by 2 before * set register, e.g. val << 3. @@ -972,12 +972,10 @@ static int ov5675_set_stream(struct v4l2_subdev *sd, int enable) static int ov5675_power_off(struct device *dev) { - /* 512 xvclk cycles after the last SCCB transation or MIPI frame end */ - u32 delay_us = DIV_ROUND_UP(512, OV5675_XVCLK_19_2 / 1000 / 1000); struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov5675 *ov5675 = to_ov5675(sd); - usleep_range(delay_us, delay_us * 2); + usleep_range(90, 100); clk_disable_unprepare(ov5675->xvclk); gpiod_set_value_cansleep(ov5675->reset_gpio, 1); @@ -988,7 +986,6 @@ static int ov5675_power_off(struct device *dev) static int ov5675_power_on(struct device *dev) { - u32 delay_us = DIV_ROUND_UP(8192, OV5675_XVCLK_19_2 / 1000 / 1000); struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov5675 *ov5675 = to_ov5675(sd); int ret; @@ -1014,8 +1011,11 @@ static int ov5675_power_on(struct device *dev) gpiod_set_value_cansleep(ov5675->reset_gpio, 0); - /* 8192 xvclk cycles prior to the first SCCB transation */ - usleep_range(delay_us, delay_us * 2); + /* Worst case quiesence gap is 1.365 milliseconds @ 6MHz XVCLK + * Add an additional threshold grace period to ensure reset + * completion before initiating our first I2C transaction. + */ + usleep_range(1500, 1600); return 0; } @@ -1295,11 +1295,8 @@ static int ov5675_probe(struct i2c_client *client) return -ENOMEM; ret = ov5675_get_hwcfg(ov5675, &client->dev); - if (ret) { - dev_err(&client->dev, "failed to get HW configuration: %d", - ret); + if (ret) return ret; - } v4l2_i2c_subdev_init(&ov5675->sd, client, &ov5675_subdev_ops); |