From: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxxxxx>
Until now, this driver only supported ACPI. This adds support for
Device Tree too while enabling clock and regulators in runtime PM.
Signed-off-by: Quentin Schulz <quentin.schulz@xxxxxxxxxxxxxxxxxxxxx>
---
v5:
- fixed -Wdeclaration-after-statement for delay_us,
v4:
- added delays based on clock cycles as specified in datasheet for
pre-power-off and post-power-on,
- re-arranged clk handling, shutdown toggling and regulator handling to
better match power up/down sequence defined in datasheet,
- added comment on need for regulator being stable before releasing
shutdown pin,
v3:
- added linux/mod_devicetable.h include,
- moved delay for reset pulse right after the regulators are enabled,
- removed check on is_acpi_node in favor of checks on presence of OF
properties (e.g. devm_clk_get_optional returns NULL),
- moved power management out of system suspend/resume into runtime PM
callbacks,
- removed ACPI specific comment since it's not specific to this driver,
- changed devm_clk_get to devm_clk_get_optional,
- remove OF use of clock-frequency (handled by devm_clk_get_optional
directly),
- removed name of clock (only one, so no need for anything explicit)
when requesting a clock from OF,
- wrapped lines to 80 chars,
v2:
- fixed unused-const-variable warning by removing of_match_ptr in
of_match_table, reported by kernel test robot,
drivers/media/i2c/ov5675.c | 149 +++++++++++++++++++++++++++++++------
1 file changed, 128 insertions(+), 21 deletions(-)
diff --git a/drivers/media/i2c/ov5675.c b/drivers/media/i2c/ov5675.c
index 82ba9f56baec8..ea801edb8e408 100644
--- a/drivers/media/i2c/ov5675.c
+++ b/drivers/media/i2c/ov5675.c
@@ -3,10 +3,14 @@
#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/mod_devicetable.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 +21,7 @@
#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 +80,14 @@
#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 +496,9 @@ 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 +959,56 @@ static int ov5675_set_stream(struct v4l2_subdev *sd, int enable)
return ret;
}
+static int ov5675_power_off(struct device *dev)
