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72 lines
2.1 KiB
72 lines
2.1 KiB
From f4d559078cab81209b721a83ffd87a40a6fb52c4 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.org>
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Date: Fri, 23 Jun 2017 17:58:55 +0100
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Subject: [PATCH 324/454] ov5647: Add support for non-continuous clock mode
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The driver was only supporting continuous clock mode
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although this was not stated anywhere.
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Non-continuous clock saves a small amount of power and
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on some SoCs is easier to interface with.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org>
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---
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drivers/media/i2c/ov5647.c | 13 ++++++++++---
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1 file changed, 10 insertions(+), 3 deletions(-)
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--- a/drivers/media/i2c/ov5647.c
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+++ b/drivers/media/i2c/ov5647.c
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@@ -86,6 +86,7 @@ struct ov5647 {
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int power_count;
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struct clk *xclk;
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struct gpio_desc *pwdn;
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+ unsigned int flags;
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};
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static inline struct ov5647 *to_state(struct v4l2_subdev *sd)
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@@ -302,6 +303,7 @@ static int __sensor_init(struct v4l2_sub
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int ret;
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u8 resetval, rdval;
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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+ struct ov5647 *ov5647 = to_state(sd);
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ret = ov5647_read(sd, 0x0100, &rdval);
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if (ret < 0)
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@@ -329,7 +331,9 @@ static int __sensor_init(struct v4l2_sub
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return ret;
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}
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- return ov5647_write(sd, 0x4800, 0x04);
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+ return ov5647_write(sd, 0x4800,
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+ (ov5647->flags & V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK) ?
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+ 0x34 : 0x04);
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}
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static int ov5647_sensor_power(struct v4l2_subdev *sd, int on)
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@@ -547,7 +551,7 @@ static const struct v4l2_subdev_internal
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.open = ov5647_open,
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};
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-static int ov5647_parse_dt(struct device_node *np)
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+static int ov5647_parse_dt(struct device_node *np, struct ov5647 *sensor)
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{
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struct v4l2_fwnode_endpoint bus_cfg;
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struct device_node *ep;
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@@ -560,6 +564,9 @@ static int ov5647_parse_dt(struct device
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ret = v4l2_fwnode_endpoint_parse(of_fwnode_handle(ep), &bus_cfg);
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+ if (!ret)
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+ sensor->flags = bus_cfg.bus.mipi_csi2.flags;
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+
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of_node_put(ep);
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return ret;
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}
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@@ -579,7 +586,7 @@ static int ov5647_probe(struct i2c_clien
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return -ENOMEM;
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if (IS_ENABLED(CONFIG_OF) && np) {
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- ret = ov5647_parse_dt(np);
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+ ret = ov5647_parse_dt(np, sensor);
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if (ret) {
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dev_err(dev, "DT parsing error: %d\n", ret);
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return ret;
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