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[media] media: i2c: tvp7002: add OF support
add OF support for the tvp7002 driver. Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Lad, Prabhakar
Mauro Carvalho Chehab
parent
d1d70aa69d
commit
c0d9644fa0
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@ -0,0 +1,53 @@
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* Texas Instruments TV7002 video decoder
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The TVP7002 device supports digitizing of video and graphics signal in RGB and
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YPbPr color space.
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Required Properties :
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- compatible : Must be "ti,tvp7002"
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Optional Properties:
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- hsync-active: HSYNC Polarity configuration for the bus. Default value when
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this property is not specified is <0>.
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- vsync-active: VSYNC Polarity configuration for the bus. Default value when
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this property is not specified is <0>.
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- pclk-sample: Clock polarity of the bus. Default value when this property is
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not specified is <0>.
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- sync-on-green-active: Active state of Sync-on-green signal property of the
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endpoint.
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0 = Normal Operation (Active Low, Default)
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1 = Inverted operation
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- field-even-active: Active-high Field ID output polarity control of the bus.
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Under normal operation, the field ID output is set to logic 1 for an odd field
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(field 1) and set to logic 0 for an even field (field 0).
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0 = Normal Operation (Active Low, Default)
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1 = FID output polarity inverted
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For further reading of port node refer Documentation/devicetree/bindings/media/
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video-interfaces.txt.
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Example:
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i2c0@1c22000 {
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...
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...
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tvp7002@5c {
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compatible = "ti,tvp7002";
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reg = <0x5c>;
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port {
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tvp7002_1: endpoint {
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hsync-active = <1>;
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vsync-active = <1>;
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pclk-sample = <0>;
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sync-on-green-active = <1>;
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field-even-active = <0>;
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};
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};
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};
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...
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};
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@ -35,6 +35,8 @@
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#include <media/v4l2-device.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-of.h>
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#include "tvp7002_reg.h"
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MODULE_DESCRIPTION("TI TVP7002 Video and Graphics Digitizer driver");
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@ -943,6 +945,48 @@ static const struct v4l2_subdev_ops tvp7002_ops = {
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.pad = &tvp7002_pad_ops,
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};
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static struct tvp7002_config *
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tvp7002_get_pdata(struct i2c_client *client)
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{
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struct v4l2_of_endpoint bus_cfg;
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struct tvp7002_config *pdata;
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struct device_node *endpoint;
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unsigned int flags;
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if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)
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return client->dev.platform_data;
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endpoint = v4l2_of_get_next_endpoint(client->dev.of_node, NULL);
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if (!endpoint)
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return NULL;
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pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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goto done;
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v4l2_of_parse_endpoint(endpoint, &bus_cfg);
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flags = bus_cfg.bus.parallel.flags;
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if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
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pdata->hs_polarity = 1;
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if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
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pdata->vs_polarity = 1;
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if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
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pdata->clk_polarity = 1;
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if (flags & V4L2_MBUS_FIELD_EVEN_HIGH)
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pdata->fid_polarity = 1;
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if (flags & V4L2_MBUS_VIDEO_SOG_ACTIVE_HIGH)
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pdata->sog_polarity = 1;
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done:
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of_node_put(endpoint);
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return pdata;
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}
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/*
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* tvp7002_probe - Probe a TVP7002 device
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* @c: ptr to i2c_client struct
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@ -954,32 +998,32 @@ static const struct v4l2_subdev_ops tvp7002_ops = {
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*/
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static int tvp7002_probe(struct i2c_client *c, const struct i2c_device_id *id)
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{
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struct tvp7002_config *pdata = tvp7002_get_pdata(c);
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struct v4l2_subdev *sd;
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struct tvp7002 *device;
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struct v4l2_dv_timings timings;
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int polarity_a;
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int polarity_b;
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u8 revision;
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int error;
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if (pdata == NULL) {
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dev_err(&c->dev, "No platform data\n");
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return -EINVAL;
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}
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(c->adapter,
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I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
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return -EIO;
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if (!c->dev.platform_data) {
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v4l_err(c, "No platform data!!\n");
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return -ENODEV;
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}
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device = devm_kzalloc(&c->dev, sizeof(struct tvp7002), GFP_KERNEL);
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if (!device)
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return -ENOMEM;
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sd = &device->sd;
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device->pdata = c->dev.platform_data;
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device->pdata = pdata;
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device->current_timings = tvp7002_timings;
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/* Tell v4l2 the device is ready */
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@ -1084,9 +1128,18 @@ static const struct i2c_device_id tvp7002_id[] = {
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};
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MODULE_DEVICE_TABLE(i2c, tvp7002_id);
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#if IS_ENABLED(CONFIG_OF)
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static const struct of_device_id tvp7002_of_match[] = {
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{ .compatible = "ti,tvp7002", },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, tvp7002_of_match);
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#endif
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/* I2C driver data */
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static struct i2c_driver tvp7002_driver = {
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.driver = {
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.of_match_table = of_match_ptr(tvp7002_of_match),
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.owner = THIS_MODULE,
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.name = TVP7002_MODULE_NAME,
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},
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