Hello,
This patchset adds support for the Omnivision OV5647 sensor.
At the moment it only supports 640x480 in RAW 8.
This is the eleventh version of the OV5647 camera driver patchset.
v11:
- Remove leftover debug code
Suggested-by: Sakari Ailus <[email protected]>
v10:
- Add more error info to model check
- Remove empty callback
Suggested-by: Sakari Ailus <[email protected]>
- Change error message in read function
- Change clock handling
- Add error checking where it was missing
- Remove debug messages
- Remove the need for clock name
Suggested-by: Vladimir Zapolskiy <[email protected]>
- Code refactoring
v9:
- Remove unused struct
- Remove comments
- Refactor error handling in i2c r/w functions
- Change declarations to single line.
- Remove value assignment in variable declarion
- Refactor configurion write loop
- Change the variable type that received ov5647_read() read value
- Remove print from probe function
- Remove unused device struct
- Remove OF dependency from Kconfig
Suggested-by: Vladimir Zapolskiy <[email protected]>
v8:
- Remove a part of the initialization procedure which wasn't doing
anything
- Check for i2c read/writes return values
- Add stream_on/off functions
Suggested-by: Sakari Ailus <[email protected]>
v7:
- Remove "0x" and leading 0 from DT documentation examples
v6:
- Add example to DT documentation
- Remove data-lanes and clock-lane property from DT
- Add external clock property to DT
- Order includes
- Remove unused variables and functions
- Add external clock handling
- Add power on counter
- Change from g/s_parm to g/s_frame_interval
v5:
- Refactor code
- Change comments
- Add missing error handling in some functions
v4:
- Add correct license
- Revert debugging info to generic infrastructure
- Turn defines into enums
- Correct code style issues
- Remove unused defines
- Make sure all errors where being handled
- Rename some functions to make code more readable
- Add some debugging info
v3:
- No changes. Re-submitted due to lack of responses
v2:
- Corrections in DT documentation
Ramiro Oliveira (2):
Documentation: DT: Add OV5647 bindings
media: i2c: Add support for OV5647 sensor.
.../devicetree/bindings/media/i2c/ov5647.txt | 35 ++
MAINTAINERS | 7 +
drivers/media/i2c/Kconfig | 11 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/ov5647.c | 634 +++++++++++++++++++++
5 files changed, 688 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/ov5647.txt
create mode 100644 drivers/media/i2c/ov5647.c
--
2.11.0
Create device tree bindings documentation.
Signed-off-by: Ramiro Oliveira <[email protected]>
Acked-by: Rob Herring <[email protected]>
Reviewed-by: Vladimir Zapolskiy <[email protected]>
---
.../devicetree/bindings/media/i2c/ov5647.txt | 35 ++++++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/ov5647.txt
diff --git a/Documentation/devicetree/bindings/media/i2c/ov5647.txt b/Documentation/devicetree/bindings/media/i2c/ov5647.txt
new file mode 100644
index 000000000000..22e44945b661
--- /dev/null
+++ b/Documentation/devicetree/bindings/media/i2c/ov5647.txt
@@ -0,0 +1,35 @@
+Omnivision OV5647 raw image sensor
+---------------------------------
+
+OV5647 is a raw image sensor with MIPI CSI-2 and CCP2 image data interfaces
+and CCI (I2C compatible) control bus.
+
+Required properties:
+
+- compatible : "ovti,ov5647".
+- reg : I2C slave address of the sensor.
+- clocks : Reference to the xclk clock.
+
+The common video interfaces bindings (see video-interfaces.txt) should be
+used to specify link to the image data receiver. The OV5647 device
+node should contain one 'port' child node with an 'endpoint' subnode.
+
+Endpoint node mandatory properties:
+
+- remote-endpoint: A phandle to the bus receiver's endpoint node.
+
+Example:
+
+ i2c@2000 {
+ ...
+ ov: camera@36 {
+ compatible = "ovti,ov5647";
+ reg = <0x36>;
+ clocks = <&camera_clk>;
+ port {
+ camera_1: endpoint {
+ remote-endpoint = <&csi1_ep1>;
+ };
+ };
+ };
+ };
--
2.11.0
The OV5647 sensor from Omnivision supports up to 2592x1944 @ 15 fps, RAW 8
and RAW 10 output formats, and MIPI CSI-2 interface.
The driver adds support for 640x480 RAW 8.
Signed-off-by: Ramiro Oliveira <[email protected]>
Acked-by: Sakari Ailus <[email protected]>
Reviewed-by: Vladimir Zapolskiy <[email protected]>
---
MAINTAINERS | 7 +
drivers/media/i2c/Kconfig | 11 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/ov5647.c | 634 +++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 653 insertions(+)
create mode 100644 drivers/media/i2c/ov5647.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 83a42ef1d1a7..f60cc40b005d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9267,6 +9267,13 @@ M: Harald Welte <[email protected]>
S: Maintained
F: drivers/char/pcmcia/cm4040_cs.*
+OMNIVISION OV5647 SENSOR DRIVER
+M: Ramiro Oliveira <[email protected]>
+L: [email protected]
+T: git git://linuxtv.org/media_tree.git
+S: Maintained
+F: drivers/media/i2c/ov5647.c
+
OMNIVISION OV7670 SENSOR DRIVER
M: Jonathan Corbet <[email protected]>
L: [email protected]
diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index cee1dae6e014..8435b99f38bc 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -531,6 +531,17 @@ config VIDEO_OV2659
To compile this driver as a module, choose M here: the
module will be called ov2659.
+config VIDEO_OV5647
+ tristate "OmniVision OV5647 sensor support"
+ depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+ depends on MEDIA_CAMERA_SUPPORT
+ ---help---
+ This is a Video4Linux2 sensor-level driver for the OmniVision
+ OV5647 camera.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ov5647.
+
config VIDEO_OV7640
tristate "OmniVision OV7640 sensor support"
depends on I2C && VIDEO_V4L2
diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile
index 5bc7bbeb5499..ef2ccf65f94c 100644
--- a/drivers/media/i2c/Makefile
+++ b/drivers/media/i2c/Makefile
@@ -83,3 +83,4 @@ obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o
obj-$(CONFIG_VIDEO_ML86V7667) += ml86v7667.o
obj-$(CONFIG_VIDEO_OV2659) += ov2659.o
obj-$(CONFIG_VIDEO_TC358743) += tc358743.o
+obj-$(CONFIG_VIDEO_OV5647) += ov5647.o
diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c
new file mode 100644
index 000000000000..f57a0b354cf6
--- /dev/null
+++ b/drivers/media/i2c/ov5647.c
@@ -0,0 +1,634 @@
+/*
+ * A V4L2 driver for OmniVision OV5647 cameras.
+ *
+ * Based on Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor driver
+ * Copyright (C) 2011 Sylwester Nawrocki <[email protected]>
+ *
+ * Based on Omnivision OV7670 Camera Driver
+ * Copyright (C) 2006-7 Jonathan Corbet <[email protected]>
+ *
+ * Copyright (C) 2016, Synopsys, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed .as is. WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/videodev2.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-image-sizes.h>
+#include <media/v4l2-mediabus.h>
+#include <media/v4l2-of.h>
+
+#define SENSOR_NAME "ov5647"
+
+#define OV5647_SW_RESET 0x0103
+#define OV5647_REG_CHIPID_H 0x300A
+#define OV5647_REG_CHIPID_L 0x300B
+
+#define REG_TERM 0xfffe
+#define VAL_TERM 0xfe
+#define REG_DLY 0xffff
+
+#define OV5647_ROW_START 0x01
+#define OV5647_ROW_START_MIN 0
+#define OV5647_ROW_START_MAX 2004
+#define OV5647_ROW_START_DEF 54
+
+#define OV5647_COLUMN_START 0x02
+#define OV5647_COLUMN_START_MIN 0
+#define OV5647_COLUMN_START_MAX 2750
+#define OV5647_COLUMN_START_DEF 16
+
+#define OV5647_WINDOW_HEIGHT 0x03
+#define OV5647_WINDOW_HEIGHT_MIN 2
+#define OV5647_WINDOW_HEIGHT_MAX 2006
+#define OV5647_WINDOW_HEIGHT_DEF 1944
+
+#define OV5647_WINDOW_WIDTH 0x04
+#define OV5647_WINDOW_WIDTH_MIN 2
+#define OV5647_WINDOW_WIDTH_MAX 2752
+#define OV5647_WINDOW_WIDTH_DEF 2592
+
+struct regval_list {
+ u16 addr;
+ u8 data;
+};
+
+struct ov5647 {
+ struct v4l2_subdev sd;
+ struct media_pad pad;
+ struct mutex lock;
+ struct v4l2_mbus_framefmt format;
+ unsigned int width;
+ unsigned int height;
+ int power_count;
+ struct clk *xclk;
+};
+
+static inline struct ov5647 *to_state(struct v4l2_subdev *sd)
+{
+ return container_of(sd, struct ov5647, sd);
+}
+
+static struct regval_list sensor_oe_disable_regs[] = {
+ {0x3000, 0x00},
+ {0x3001, 0x00},
+ {0x3002, 0x00},
+};
+
+static struct regval_list sensor_oe_enable_regs[] = {
+ {0x3000, 0x0f},
+ {0x3001, 0xff},
+ {0x3002, 0xe4},
+};
+
+static struct regval_list ov5647_640x480[] = {
+ {0x0100, 0x00},
+ {0x0103, 0x01},
+ {0x3034, 0x08},
+ {0x3035, 0x21},
+ {0x3036, 0x46},
+ {0x303c, 0x11},
+ {0x3106, 0xf5},
+ {0x3821, 0x07},
+ {0x3820, 0x41},
+ {0x3827, 0xec},
+ {0x370c, 0x0f},
+ {0x3612, 0x59},
+ {0x3618, 0x00},
+ {0x5000, 0x06},
+ {0x5001, 0x01},
+ {0x5002, 0x41},
+ {0x5003, 0x08},
+ {0x5a00, 0x08},
+ {0x3000, 0x00},
+ {0x3001, 0x00},
+ {0x3002, 0x00},
+ {0x3016, 0x08},
+ {0x3017, 0xe0},
+ {0x3018, 0x44},
+ {0x301c, 0xf8},
+ {0x301d, 0xf0},
+ {0x3a18, 0x00},
+ {0x3a19, 0xf8},
+ {0x3c01, 0x80},
+ {0x3b07, 0x0c},
+ {0x380c, 0x07},
+ {0x380d, 0x68},
+ {0x380e, 0x03},
+ {0x380f, 0xd8},
+ {0x3814, 0x31},
+ {0x3815, 0x31},
+ {0x3708, 0x64},
+ {0x3709, 0x52},
+ {0x3808, 0x02},
+ {0x3809, 0x80},
+ {0x380a, 0x01},
+ {0x380b, 0xE0},
+ {0x3801, 0x00},
+ {0x3802, 0x00},
+ {0x3803, 0x00},
+ {0x3804, 0x0a},
+ {0x3805, 0x3f},
+ {0x3806, 0x07},
+ {0x3807, 0xa1},
+ {0x3811, 0x08},
+ {0x3813, 0x02},
+ {0x3630, 0x2e},
+ {0x3632, 0xe2},
+ {0x3633, 0x23},
+ {0x3634, 0x44},
+ {0x3636, 0x06},
+ {0x3620, 0x64},
+ {0x3621, 0xe0},
+ {0x3600, 0x37},
+ {0x3704, 0xa0},
+ {0x3703, 0x5a},
+ {0x3715, 0x78},
+ {0x3717, 0x01},
+ {0x3731, 0x02},
+ {0x370b, 0x60},
+ {0x3705, 0x1a},
+ {0x3f05, 0x02},
+ {0x3f06, 0x10},
+ {0x3f01, 0x0a},
+ {0x3a08, 0x01},
+ {0x3a09, 0x27},
+ {0x3a0a, 0x00},
+ {0x3a0b, 0xf6},
+ {0x3a0d, 0x04},
+ {0x3a0e, 0x03},
+ {0x3a0f, 0x58},
+ {0x3a10, 0x50},
+ {0x3a1b, 0x58},
+ {0x3a1e, 0x50},
+ {0x3a11, 0x60},
+ {0x3a1f, 0x28},
+ {0x4001, 0x02},
+ {0x4004, 0x02},
+ {0x4000, 0x09},
+ {0x4837, 0x24},
+ {0x4050, 0x6e},
+ {0x4051, 0x8f},
+ {0x0100, 0x01},
+};
+
+static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val)
+{
+ int ret;
+ unsigned char data[3] = { reg >> 8, reg & 0xff, val};
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ ret = i2c_master_send(client, data, 3);
+ if (ret < 0)
+ dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
+ __func__, reg);
+
+ return ret;
+}
+
+static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val)
+{
+ int ret;
+ unsigned char data_w[2] = { reg >> 8, reg & 0xff };
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ ret = i2c_master_send(client, data_w, 2);
+ if (ret < 0) {
+ dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n",
+ __func__, reg);
+ return ret;
+ }
+
+ ret = i2c_master_recv(client, val, 1);
+ if (ret < 0)
+ dev_dbg(&client->dev, "%s: i2c read error, reg: %x\n",
+ __func__, reg);
+
+ return ret;
+}
+
+static int ov5647_write_array(struct v4l2_subdev *sd,
+ struct regval_list *regs, int array_size)
+{
+ int i, ret;
+
+ for (i = 0; i < array_size; i++) {
+ ret = ov5647_write(sd, regs[i].addr, regs[i].data);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel)
+{
+ u8 channel_id;
+ int ret;
+
+ ret = ov5647_read(sd, 0x4814, &channel_id);
+ if (ret < 0)
+ return ret;
+
+ channel_id &= ~(3 << 6);
+ return ov5647_write(sd, 0x4814, channel_id | (channel << 6));
+}
+
+static int ov5647_stream_on(struct v4l2_subdev *sd)
+{
+ int ret;
+
+ ret = ov5647_write(sd, 0x4202, 0x00);
+ if (ret < 0)
+ return ret;
+
+ return ov5647_write(sd, 0x300D, 0x00);
+}
+
+static int ov5647_stream_off(struct v4l2_subdev *sd)
+{
+ int ret;
+
+ ret = ov5647_write(sd, 0x4202, 0x0f);
+ if (ret < 0)
+ return ret;
+
+ return ov5647_write(sd, 0x300D, 0x01);
+}
+
+static int set_sw_standby(struct v4l2_subdev *sd, bool standby)
+{
+ int ret;
+ u8 rdval;
+
+ ret = ov5647_read(sd, 0x0100, &rdval);
+ if (ret < 0)
+ return ret;
+
+ if (standby)
+ rdval &= ~0x01;
+ else
+ rdval |= 0x01;
+
+ return ov5647_write(sd, 0x0100, rdval);
+}
+
+static int __sensor_init(struct v4l2_subdev *sd)
+{
+ int ret;
+ u8 resetval, rdval;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ ret = ov5647_read(sd, 0x0100, &rdval);
+ if (ret < 0)
+ return ret;
+
+ ret = ov5647_write_array(sd, ov5647_640x480,
+ ARRAY_SIZE(ov5647_640x480));
+ if (ret < 0) {
+ dev_err(&client->dev, "write sensor default regs error\n");
+ return ret;
+ }
+
+ ret = ov5647_set_virtual_channel(sd, 0);
+ if (ret < 0)
+ return ret;
+
+ ret = ov5647_read(sd, 0x0100, &resetval);
+ if (ret < 0)
+ return ret;
+
+ if (!(resetval & 0x01)) {
+ dev_err(&client->dev, "Device was in SW standby");
+ ret = ov5647_write(sd, 0x0100, 0x01);
+ if (ret < 0)
+ return ret;
+ }
+
+ return ov5647_write(sd, 0x4800, 0x04);
+}
+
+static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
+{
+ int ret = 0;
+ struct ov5647 *ov5647 = to_state(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ mutex_lock(&ov5647->lock);
+
+ if (on && !ov5647->power_count) {
+ dev_dbg(&client->dev, "OV5647 power on\n");
+
+ ret = clk_prepare_enable(ov5647->xclk);
+ if (ret < 0) {
+ dev_err(&client->dev, "clk prepare enable failed\n");
+ goto out;
+ }
+
+ ret = ov5647_write_array(sd, sensor_oe_enable_regs,
+ ARRAY_SIZE(sensor_oe_enable_regs));
+ if (ret < 0) {
+ clk_disable_unprepare(ov5647->xclk);
+ dev_err(&client->dev,
+ "write sensor_oe_enable_regs error\n");
+ goto out;
+ }
+
+ ret = __sensor_init(sd);
+ if (ret < 0) {
+ clk_disable_unprepare(ov5647->xclk);
+ dev_err(&client->dev,
+ "Camera not available, check Power\n");
+ goto out;
+ }
+ } else if (!on && ov5647->power_count == 1) {
+ dev_dbg(&client->dev, "OV5647 power off\n");
+
+ ret = ov5647_write_array(sd, sensor_oe_disable_regs,
+ ARRAY_SIZE(sensor_oe_disable_regs));
+
+ if (ret < 0)
+ dev_dbg(&client->dev, "disable oe failed\n");
+
+ ret = set_sw_standby(sd, true);
+
+ if (ret < 0)
+ dev_dbg(&client->dev, "soft stby failed\n");
+
+ clk_disable_unprepare(ov5647->xclk);
+ }
+
+ /* Update the power count. */
+ ov5647->power_count += on ? 1 : -1;
+ WARN_ON(ov5647->power_count < 0);
+
+out:
+ mutex_unlock(&ov5647->lock);
+
+ return ret;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int ov5647_sensor_get_register(struct v4l2_subdev *sd,
+ struct v4l2_dbg_register *reg)
+{
+ u8 val;
+ int ret;
+
+ ret = ov5647_read(sd, reg->reg & 0xff, &val);
+ if (ret < 0)
+ return ret;
+
+ reg->val = val;
+ reg->size = 1;
+
+ return 0;
+}
+
+static int ov5647_sensor_set_register(struct v4l2_subdev *sd,
+ const struct v4l2_dbg_register *reg)
+{
+ return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff);
+}
+#endif
+
+/**
+ * @short Subdev core operations registration
+ */
+static const struct v4l2_subdev_core_ops ov5647_subdev_core_ops = {
+ .s_power = ov5647_sensor_power,
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+ .g_register = ov5647_sensor_get_register,
+ .s_register = ov5647_sensor_set_register,
+#endif
+};
+
+static int ov5647_s_stream(struct v4l2_subdev *sd, int enable)
+{
+ if (enable)
+ return ov5647_stream_on(sd);
+ else
+ return ov5647_stream_off(sd);
+}
+
+static const struct v4l2_subdev_video_ops ov5647_subdev_video_ops = {
+ .s_stream = ov5647_s_stream,
+};
+
+static int ov5647_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index > 0)
+ return -EINVAL;
+
+ code->code = MEDIA_BUS_FMT_SBGGR8_1X8;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops ov5647_subdev_pad_ops = {
+ .enum_mbus_code = ov5647_enum_mbus_code,
+};
+
+static const struct v4l2_subdev_ops ov5647_subdev_ops = {
+ .core = &ov5647_subdev_core_ops,
+ .video = &ov5647_subdev_video_ops,
+ .pad = &ov5647_subdev_pad_ops,
+};
+
+static int ov5647_detect(struct v4l2_subdev *sd)
+{
+ u8 read;
+ int ret;
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ ret = ov5647_write(sd, OV5647_SW_RESET, 0x01);
+ if (ret < 0)
+ return ret;
+
+ ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &read);
+ if (ret < 0)
+ return ret;
+
+ if (read != 0x56) {
+ dev_err(&client->dev, "ID High expected 0x56 got %x", read);
+ return -ENODEV;
+ }
+
+ ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &read);
+ if (ret < 0)
+ return ret;
+
+ if (read != 0x47) {
+ dev_err(&client->dev, "ID Low expected 0x47 got %x", read);
+ return -ENODEV;
+ }
+
+ return ov5647_write(sd, OV5647_SW_RESET, 0x00);
+}
+
+static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+ struct v4l2_mbus_framefmt *format =
+ v4l2_subdev_get_try_format(sd, fh->pad, 0);
+ struct v4l2_rect *crop =
+ v4l2_subdev_get_try_crop(sd, fh->pad, 0);
+
+ crop->left = OV5647_COLUMN_START_DEF;
+ crop->top = OV5647_ROW_START_DEF;
+ crop->width = OV5647_WINDOW_WIDTH_DEF;
+ crop->height = OV5647_WINDOW_HEIGHT_DEF;
+
+ format->code = MEDIA_BUS_FMT_SBGGR8_1X8;
+
+ format->width = OV5647_WINDOW_WIDTH_DEF;
+ format->height = OV5647_WINDOW_HEIGHT_DEF;
+ format->field = V4L2_FIELD_NONE;
+ format->colorspace = V4L2_COLORSPACE_SRGB;
+
+ return 0;
+}
+
+static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = {
+ .open = ov5647_open,
+};
+
+static int ov5647_parse_dt(struct device_node *np)
+{
+ struct v4l2_of_endpoint bus_cfg;
+ struct device_node *ep;
+
+ int ret;
+
+ ep = of_graph_get_next_endpoint(np, NULL);
+ if (!ep)
+ return -EINVAL;
+
+ ret = v4l2_of_parse_endpoint(ep, &bus_cfg);
+
+ of_node_put(ep);
+ return ret;
+}
+
+static int ov5647_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ struct ov5647 *sensor;
+ int ret;
+ struct v4l2_subdev *sd;
+ struct device_node *np = client->dev.of_node;
+ u32 xclk_freq;
+
+ sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);
+ if (!sensor)
+ return -ENOMEM;
+
+ if (IS_ENABLED(CONFIG_OF) && np) {
+ ret = ov5647_parse_dt(np);
+ if (ret) {
+ dev_err(dev, "DT parsing error: %d\n", ret);
+ return ret;
+ }
+ }
+
+ /* get system clock (xclk) */
+ sensor->xclk = devm_clk_get(dev, NULL);
+ if (IS_ERR(sensor->xclk)) {
+ dev_err(dev, "could not get xclk");
+ return PTR_ERR(sensor->xclk);
+ }
+
+ xclk_freq = clk_get_rate(sensor->xclk);
+ if (xclk_freq != 25000000) {
+ dev_err(dev, "Unsupported clock frequency: %u\n", xclk_freq);
+ return -EINVAL;
+ }
+
+ mutex_init(&sensor->lock);
+
+ sd = &sensor->sd;
+ v4l2_i2c_subdev_init(sd, client, &ov5647_subdev_ops);
+ sensor->sd.internal_ops = &ov5647_subdev_internal_ops;
+ sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+
+ sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+ sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
+ ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad);
+ if (ret < 0)
+ goto mutex_remove;
+
+ ret = ov5647_detect(sd);
+ if (ret < 0)
+ goto error;
+
+ ret = v4l2_async_register_subdev(sd);
+ if (ret < 0)
+ goto error;
+
+ dev_dbg(dev, "OmniVision OV5647 camera driver probed\n");
+ return 0;
+error:
+ media_entity_cleanup(&sd->entity);
+mutex_remove:
+ mutex_destroy(&sensor->lock);
+ return ret;
+}
+
+static int ov5647_remove(struct i2c_client *client)
+{
+ struct v4l2_subdev *sd = i2c_get_clientdata(client);
+ struct ov5647 *ov5647 = to_state(sd);
+
+ v4l2_async_unregister_subdev(&ov5647->sd);
+ media_entity_cleanup(&ov5647->sd.entity);
+ v4l2_device_unregister_subdev(sd);
+ mutex_destroy(&ov5647->lock);
+
+ return 0;
+}
+
+static const struct i2c_device_id ov5647_id[] = {
+ { "ov5647", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ov5647_id);
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id ov5647_of_match[] = {
+ { .compatible = "ovti,ov5647" },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ov5647_of_match);
+#endif
+
+static struct i2c_driver ov5647_driver = {
+ .driver = {
+ .of_match_table = of_match_ptr(ov5647_of_match),
+ .name = SENSOR_NAME,
+ },
+ .probe = ov5647_probe,
+ .remove = ov5647_remove,
+ .id_table = ov5647_id,
+};
+
+module_i2c_driver(ov5647_driver);
+
+MODULE_AUTHOR("Ramiro Oliveira <[email protected]>");
+MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors");
+MODULE_LICENSE("GPL v2");
--
2.11.0