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