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path: root/drivers/media/i2c/ov2740.c
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Diffstat (limited to 'drivers/media/i2c/ov2740.c')
-rw-r--r--drivers/media/i2c/ov2740.c90
1 files changed, 75 insertions, 15 deletions
diff --git a/drivers/media/i2c/ov2740.c b/drivers/media/i2c/ov2740.c
index 552935ccb4a9..6cf461e3373c 100644
--- a/drivers/media/i2c/ov2740.c
+++ b/drivers/media/i2c/ov2740.c
@@ -1,7 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2020 Intel Corporation.
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <linux/acpi.h>
#include <linux/clk.h>
#include <linux/delay.h>
@@ -11,6 +11,7 @@
#include <linux/pm_runtime.h>
#include <linux/nvmem-provider.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
@@ -76,6 +77,12 @@
/* OTP registers from sensor */
#define OV2740_REG_OTP_CUSTOMER 0x7010
+static const char * const ov2740_supply_name[] = {
+ "AVDD",
+ "DOVDD",
+ "DVDD",
+};
+
struct nvm_data {
struct nvmem_device *nvmem;
struct regmap *regmap;
@@ -523,14 +530,16 @@ struct ov2740 {
struct v4l2_ctrl *hblank;
struct v4l2_ctrl *exposure;
- /* GPIOs, clocks */
+ /* GPIOs, clocks, regulators */
struct gpio_desc *reset_gpio;
+ struct gpio_desc *powerdown_gpio;
struct clk *clk;
+ struct regulator_bulk_data supplies[ARRAY_SIZE(ov2740_supply_name)];
/* Current mode */
const struct ov2740_mode *cur_mode;
- /* NVM data inforamtion */
+ /* NVM data information */
struct nvm_data *nvm;
/* Supported modes */
@@ -644,6 +653,8 @@ static int ov2740_identify_module(struct ov2740 *ov2740)
return -ENXIO;
}
+ dev_dbg(&client->dev, "chip id: 0x%x\n", val);
+
ov2740->identified = true;
return 0;
@@ -753,29 +764,32 @@ static const struct v4l2_ctrl_ops ov2740_ctrl_ops = {
static int ov2740_init_controls(struct ov2740 *ov2740)
{
+ struct i2c_client *client = v4l2_get_subdevdata(&ov2740->sd);
struct v4l2_ctrl_handler *ctrl_hdlr;
const struct ov2740_mode *cur_mode;
s64 exposure_max, h_blank, pixel_rate;
u32 vblank_min, vblank_max, vblank_default;
+ struct v4l2_fwnode_device_properties props;
int size;
int ret;
ctrl_hdlr = &ov2740->ctrl_handler;
- ret = v4l2_ctrl_handler_init(ctrl_hdlr, 8);
+ ret = v4l2_ctrl_handler_init(ctrl_hdlr, 10);
if (ret)
return ret;
cur_mode = ov2740->cur_mode;
size = ARRAY_SIZE(link_freq_menu_items);
- ov2740->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov2740_ctrl_ops,
- V4L2_CID_LINK_FREQ,
- size - 1, 0,
- link_freq_menu_items);
+ ov2740->link_freq =
+ v4l2_ctrl_new_int_menu(ctrl_hdlr, &ov2740_ctrl_ops,
+ V4L2_CID_LINK_FREQ, size - 1,
+ ov2740->supported_modes->link_freq_index,
+ link_freq_menu_items);
if (ov2740->link_freq)
ov2740->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
- pixel_rate = to_pixel_rate(OV2740_LINK_FREQ_360MHZ_INDEX);
+ pixel_rate = to_pixel_rate(ov2740->supported_modes->link_freq_index);
ov2740->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &ov2740_ctrl_ops,
V4L2_CID_PIXEL_RATE, 0,
pixel_rate, 1, pixel_rate);
@@ -810,6 +824,15 @@ static int ov2740_init_controls(struct ov2740 *ov2740)
V4L2_CID_TEST_PATTERN,
ARRAY_SIZE(ov2740_test_pattern_menu) - 1,
0, 0, ov2740_test_pattern_menu);
+
+ ret = v4l2_fwnode_device_parse(&client->dev, &props);
+ if (ret) {
+ v4l2_ctrl_handler_free(ctrl_hdlr);
+ return ret;
+ }
+
+ v4l2_ctrl_new_fwnode_properties(ctrl_hdlr, &ov2740_ctrl_ops, &props);
+
if (ctrl_hdlr->error) {
v4l2_ctrl_handler_free(ctrl_hdlr);
return ctrl_hdlr->error;
@@ -1131,7 +1154,8 @@ static int ov2740_check_hwcfg(struct device *dev)
*/
ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
if (!ep)
- return -EPROBE_DEFER;
+ return dev_err_probe(dev, -EPROBE_DEFER,
+ "waiting for fwnode graph endpoint\n");
ret = fwnode_property_read_u32(fwnode, "clock-frequency", &mclk);
if (ret) {
@@ -1293,7 +1317,10 @@ static int ov2740_suspend(struct device *dev)
struct ov2740 *ov2740 = to_ov2740(sd);
gpiod_set_value_cansleep(ov2740->reset_gpio, 1);
+ gpiod_set_value_cansleep(ov2740->powerdown_gpio, 1);
clk_disable_unprepare(ov2740->clk);
+ regulator_bulk_disable(ARRAY_SIZE(ov2740_supply_name),
+ ov2740->supplies);
return 0;
}
@@ -1303,10 +1330,19 @@ static int ov2740_resume(struct device *dev)
struct ov2740 *ov2740 = to_ov2740(sd);
int ret;
- ret = clk_prepare_enable(ov2740->clk);
+ ret = regulator_bulk_enable(ARRAY_SIZE(ov2740_supply_name),
+ ov2740->supplies);
if (ret)
return ret;
+ ret = clk_prepare_enable(ov2740->clk);
+ if (ret) {
+ regulator_bulk_disable(ARRAY_SIZE(ov2740_supply_name),
+ ov2740->supplies);
+ return ret;
+ }
+
+ gpiod_set_value_cansleep(ov2740->powerdown_gpio, 0);
gpiod_set_value_cansleep(ov2740->reset_gpio, 0);
msleep(20);
@@ -1318,6 +1354,7 @@ static int ov2740_probe(struct i2c_client *client)
struct device *dev = &client->dev;
struct ov2740 *ov2740;
bool full_power;
+ unsigned int i;
int ret;
ov2740 = devm_kzalloc(&client->dev, sizeof(*ov2740), GFP_KERNEL);
@@ -1329,18 +1366,41 @@ static int ov2740_probe(struct i2c_client *client)
ret = ov2740_check_hwcfg(dev);
if (ret)
- return dev_err_probe(dev, ret, "failed to check HW configuration\n");
+ return ret;
ov2740->reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
- if (IS_ERR(ov2740->reset_gpio))
+ if (IS_ERR(ov2740->reset_gpio)) {
return dev_err_probe(dev, PTR_ERR(ov2740->reset_gpio),
"failed to get reset GPIO\n");
+ }
+
+ ov2740->powerdown_gpio = devm_gpiod_get_optional(dev, "powerdown", GPIOD_OUT_HIGH);
+ if (IS_ERR(ov2740->powerdown_gpio)) {
+ return dev_err_probe(dev, PTR_ERR(ov2740->powerdown_gpio),
+ "failed to get powerdown GPIO\n");
+ }
+
+ if (ov2740->reset_gpio || ov2740->powerdown_gpio) {
+ /*
+ * Ensure reset/powerdown is asserted for at least 20 ms before
+ * ov2740_resume() deasserts it.
+ */
+ msleep(20);
+ }
ov2740->clk = devm_clk_get_optional(dev, "clk");
if (IS_ERR(ov2740->clk))
return dev_err_probe(dev, PTR_ERR(ov2740->clk),
"failed to get clock\n");
+ for (i = 0; i < ARRAY_SIZE(ov2740_supply_name); i++)
+ ov2740->supplies[i].supply = ov2740_supply_name[i];
+
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ov2740_supply_name),
+ ov2740->supplies);
+ if (ret)
+ return dev_err_probe(dev, ret, "failed to get regulators\n");
+
full_power = acpi_dev_state_d0(&client->dev);
if (full_power) {
/* ACPI does not always clear the reset GPIO / enable the clock */
@@ -1396,12 +1456,12 @@ static int ov2740_probe(struct i2c_client *client)
return 0;
probe_error_v4l2_subdev_cleanup:
+ pm_runtime_disable(&client->dev);
+ pm_runtime_set_suspended(&client->dev);
v4l2_subdev_cleanup(&ov2740->sd);
probe_error_media_entity_cleanup:
media_entity_cleanup(&ov2740->sd.entity);
- pm_runtime_disable(&client->dev);
- pm_runtime_set_suspended(&client->dev);
probe_error_v4l2_ctrl_handler_free:
v4l2_ctrl_handler_free(ov2740->sd.ctrl_handler);
generated by cgit (git 2.34.1) at 2025-07-23 16:18:13 +0000