@@ -3,10 +3,13 @@
#include <asm/unaligned.h>
#include <linux/acpi.h>
+#include <linux/clk.h>
#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
@@ -17,7 +20,7 @@
#define OV5675_LINK_FREQ_450MHZ 450000000ULL
#define OV5675_SCLK 90000000LL
-#define OV5675_MCLK 19200000
+#define OV5675_XVCLK_19_2 19200000
#define OV5675_DATA_LANES 2
#define OV5675_RGB_DEPTH 10
@@ -76,6 +79,14 @@
#define to_ov5675(_sd) container_of(_sd, struct ov5675, sd)
+static const char * const ov5675_supply_names[] = {
+ "avdd", /* Analog power */
+ "dovdd", /* Digital I/O power */
+ "dvdd", /* Digital core power */
+};
+
+#define OV5675_NUM_SUPPLIES ARRAY_SIZE(ov5675_supply_names)
+
enum {
OV5675_LINK_FREQ_900MBPS,
};
@@ -484,6 +495,9 @@ struct ov5675 {
struct v4l2_subdev sd;
struct media_pad pad;
struct v4l2_ctrl_handler ctrl_handler;
+ struct clk *xvclk;
+ struct gpio_desc *reset_gpio;
+ struct regulator_bulk_data supplies[OV5675_NUM_SUPPLIES];
/* V4L2 Controls */
struct v4l2_ctrl *link_freq;
@@ -944,6 +958,52 @@ static int ov5675_set_stream(struct v4l2_subdev *sd, int enable)
return ret;
}
+static void __ov5675_power_off(struct ov5675 *ov5675)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
+
+ if (is_acpi_node(dev_fwnode(&client->dev)))
+ return;
+
+ gpiod_set_value_cansleep(ov5675->reset_gpio, 1);
+ usleep_range(1000, 1200);
+
+ regulator_bulk_disable(OV5675_NUM_SUPPLIES, ov5675->supplies);
+ clk_disable_unprepare(ov5675->xvclk);
+}
+
+static int __ov5675_power_on(struct ov5675 *ov5675)
+{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov5675->sd);
+ int ret;
+
+ if (is_acpi_node(dev_fwnode(&client->dev)))
+ return 0;
+
+ ret = clk_prepare_enable(ov5675->xvclk);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to enable xvclk: %d\n", ret);
+ return ret;
+ }
+
+ gpiod_set_value_cansleep(ov5675->reset_gpio, 1);
+
+ /* Reset pulse should be at least 2ms */
+ usleep_range(2000, 2200);
+
+ ret = regulator_bulk_enable(OV5675_NUM_SUPPLIES, ov5675->supplies);
+ if (ret) {
+ clk_disable_unprepare(ov5675->xvclk);
+ return ret;
+ }
+
+ gpiod_set_value_cansleep(ov5675->reset_gpio, 0);
+
+ usleep_range(1000, 1200);
+
+ return 0;
+}
+
static int __maybe_unused ov5675_suspend(struct device *dev)
{
struct v4l2_subdev *sd = dev_get_drvdata(dev);
@@ -953,6 +1013,7 @@ static int __maybe_unused ov5675_suspend(struct device *dev)
if (ov5675->streaming)
ov5675_stop_streaming(ov5675);
+ __ov5675_power_off(ov5675);
mutex_unlock(&ov5675->mutex);
return 0;
@@ -965,6 +1026,8 @@ static int __maybe_unused ov5675_resume(struct device *dev)
int ret;
mutex_lock(&ov5675->mutex);
+
+ __ov5675_power_on(ov5675);
if (ov5675->streaming) {
ret = ov5675_start_streaming(ov5675);
if (ret) {
@@ -1106,32 +1169,60 @@ static const struct v4l2_subdev_internal_ops ov5675_internal_ops = {
.open = ov5675_open,
};
-static int ov5675_check_hwcfg(struct device *dev)
+static int ov5675_get_hwcfg(struct ov5675 *ov5675, struct device *dev)
{
struct fwnode_handle *ep;
struct fwnode_handle *fwnode = dev_fwnode(dev);
struct v4l2_fwnode_endpoint bus_cfg = {
.bus_type = V4L2_MBUS_CSI2_DPHY
};
- u32 mclk;
+ u32 xvclk_rate;
int ret;
unsigned int i, j;
if (!fwnode)
return -ENXIO;
- ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
+ ret = fwnode_property_read_u32(fwnode, "clock-frequency", &xvclk_rate);
if (ret) {
dev_err(dev, "can't get clock frequency");
return ret;
}
- if (mclk != OV5675_MCLK) {
- dev_err(dev, "external clock %d is not supported", mclk);
+ if (!is_acpi_node(fwnode)) {
+ ov5675->xvclk = devm_clk_get(dev, "xvclk");
+ if (IS_ERR(ov5675->xvclk)) {
+ ret = PTR_ERR(ov5675->xvclk);
+ dev_err(dev, "failed to get xvclk: %d\n", ret);
+ return ret;
+ }
+
+ clk_set_rate(ov5675->xvclk, xvclk_rate);
+ xvclk_rate = clk_get_rate(ov5675->xvclk);
+ }
+
+ if (xvclk_rate != OV5675_XVCLK_19_2) {
+ dev_err(dev, "external clock rate %u is unsupported", xvclk_rate);
return -EINVAL;
}
+ ov5675->reset_gpio = devm_gpiod_get_optional(dev, "reset",
+ GPIOD_OUT_HIGH);
+ if (IS_ERR(ov5675->reset_gpio)) {
+ ret = PTR_ERR(ov5675->reset_gpio);
+ dev_err(dev, "failed to get reset-gpios: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < OV5675_NUM_SUPPLIES; i++)
+ ov5675->supplies[i].supply = ov5675_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, OV5675_NUM_SUPPLIES,
+ ov5675->supplies);
+ if (ret)
+ return ret;
+
ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
if (!ep)
return -ENXIO;
@@ -1186,6 +1277,8 @@ static int ov5675_remove(struct i2c_client *client)
pm_runtime_disable(&client->dev);
mutex_destroy(&ov5675->mutex);
+ __ov5675_power_off(ov5675);
+
return 0;
}
@@ -1195,25 +1288,31 @@ static int ov5675_probe(struct i2c_client *client)
bool full_power;
int ret;
- ret = ov5675_check_hwcfg(&client->dev);
+ ov5675 = devm_kzalloc(&client->dev, sizeof(*ov5675), GFP_KERNEL);
+ if (!ov5675)
+ return -ENOMEM;
+
+ ret = ov5675_get_hwcfg(ov5675, &client->dev);
if (ret) {
- dev_err(&client->dev, "failed to check HW configuration: %d",
+ dev_err(&client->dev, "failed to get HW configuration: %d",
ret);
return ret;
}
- ov5675 = devm_kzalloc(&client->dev, sizeof(*ov5675), GFP_KERNEL);
- if (!ov5675)
- return -ENOMEM;
-
v4l2_i2c_subdev_init(&ov5675->sd, client, &ov5675_subdev_ops);
+ ret = __ov5675_power_on(ov5675);
+ if (ret) {
+ dev_err(&client->dev, "failed to power on: %d\n", ret);
+ return ret;
+ }
+
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
ret = ov5675_identify_module(ov5675);
if (ret) {
dev_err(&client->dev, "failed to find sensor: %d", ret);
- return ret;
+ goto probe_power_off;
}
}
@@ -1262,6 +1361,8 @@ static int ov5675_probe(struct i2c_client *client)
probe_error_v4l2_ctrl_handler_free:
v4l2_ctrl_handler_free(ov5675->sd.ctrl_handler);
mutex_destroy(&ov5675->mutex);
+probe_power_off:
+ __ov5675_power_off(ov5675);
return ret;
}
@@ -1279,11 +1380,18 @@ static const struct acpi_device_id ov5675_acpi_ids[] = {
MODULE_DEVICE_TABLE(acpi, ov5675_acpi_ids);
#endif
+static const struct of_device_id ov5675_of_match[] = {
+ { .compatible = "ovti,ov5675", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, ov5675_of_match);
+
static struct i2c_driver ov5675_i2c_driver = {
.driver = {
.name = "ov5675",
.pm = &ov5675_pm_ops,
.acpi_match_table = ACPI_PTR(ov5675_acpi_ids),
+ .of_match_table = of_match_ptr(ov5675_of_match),
},
.probe_new = ov5675_probe,
.remove = ov5675_remove,