diff options
Diffstat (limited to 'drivers/media/i2c/ov13b10.c')
| -rw-r--r-- | drivers/media/i2c/ov13b10.c | 129 |
1 files changed, 115 insertions, 14 deletions
diff --git a/drivers/media/i2c/ov13b10.c b/drivers/media/i2c/ov13b10.c index 6110fb1e6bc6..dbc642c5995b 100644 --- a/drivers/media/i2c/ov13b10.c +++ b/drivers/media/i2c/ov13b10.c @@ -2,6 +2,9 @@ // Copyright (c) 2021 Intel Corporation. #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> @@ -573,6 +576,11 @@ struct ov13b10 { struct media_pad pad; struct v4l2_ctrl_handler ctrl_handler; + + struct clk *img_clk; + struct regulator *avdd; + struct gpio_desc *reset; + /* V4L2 Controls */ struct v4l2_ctrl *link_freq; struct v4l2_ctrl *pixel_rate; @@ -1051,6 +1059,49 @@ static int ov13b10_identify_module(struct ov13b10 *ov13b) return 0; } +static int ov13b10_power_off(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov13b10 *ov13b10 = to_ov13b10(sd); + + gpiod_set_value_cansleep(ov13b10->reset, 1); + + if (ov13b10->avdd) + regulator_disable(ov13b10->avdd); + + clk_disable_unprepare(ov13b10->img_clk); + + return 0; +} + +static int ov13b10_power_on(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov13b10 *ov13b10 = to_ov13b10(sd); + int ret; + + ret = clk_prepare_enable(ov13b10->img_clk); + if (ret < 0) { + dev_err(dev, "failed to enable imaging clock: %d", ret); + return ret; + } + + if (ov13b10->avdd) { + ret = regulator_enable(ov13b10->avdd); + if (ret < 0) { + dev_err(dev, "failed to enable avdd: %d", ret); + clk_disable_unprepare(ov13b10->img_clk); + return ret; + } + } + + gpiod_set_value_cansleep(ov13b10->reset, 0); + /* 5ms to wait ready after XSHUTDN assert */ + usleep_range(5000, 5500); + + return 0; +} + static int ov13b10_start_streaming(struct ov13b10 *ov13b) { struct i2c_client *client = v4l2_get_subdevdata(&ov13b->sd); @@ -1145,7 +1196,7 @@ err_unlock: return ret; } -static int __maybe_unused ov13b10_suspend(struct device *dev) +static int ov13b10_suspend(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov13b10 *ov13b = to_ov13b10(sd); @@ -1153,26 +1204,35 @@ static int __maybe_unused ov13b10_suspend(struct device *dev) if (ov13b->streaming) ov13b10_stop_streaming(ov13b); + ov13b10_power_off(dev); + return 0; } -static int __maybe_unused ov13b10_resume(struct device *dev) +static int ov13b10_resume(struct device *dev) { struct v4l2_subdev *sd = dev_get_drvdata(dev); struct ov13b10 *ov13b = to_ov13b10(sd); int ret; + ret = ov13b10_power_on(dev); + if (ret) + goto pm_fail; + if (ov13b->streaming) { ret = ov13b10_start_streaming(ov13b); if (ret) - goto error; + goto stop_streaming; } return 0; -error: +stop_streaming: ov13b10_stop_streaming(ov13b); + ov13b10_power_off(dev); +pm_fail: ov13b->streaming = false; + return ret; } @@ -1317,6 +1377,34 @@ static void ov13b10_free_controls(struct ov13b10 *ov13b) mutex_destroy(&ov13b->mutex); } +static int ov13b10_get_pm_resources(struct device *dev) +{ + struct v4l2_subdev *sd = dev_get_drvdata(dev); + struct ov13b10 *ov13b = to_ov13b10(sd); + int ret; + + ov13b->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ov13b->reset)) + return dev_err_probe(dev, PTR_ERR(ov13b->reset), + "failed to get reset gpio\n"); + + ov13b->img_clk = devm_clk_get_optional(dev, NULL); + if (IS_ERR(ov13b->img_clk)) + return dev_err_probe(dev, PTR_ERR(ov13b->img_clk), + "failed to get imaging clock\n"); + + ov13b->avdd = devm_regulator_get_optional(dev, "avdd"); + if (IS_ERR(ov13b->avdd)) { + ret = PTR_ERR(ov13b->avdd); + ov13b->avdd = NULL; + if (ret != -ENODEV) + return dev_err_probe(dev, ret, + "failed to get avdd regulator\n"); + } + + return 0; +} + static int ov13b10_check_hwcfg(struct device *dev) { struct v4l2_fwnode_endpoint bus_cfg = { @@ -1331,6 +1419,10 @@ static int ov13b10_check_hwcfg(struct device *dev) if (!fwnode) return -ENXIO; + ep = fwnode_graph_get_next_endpoint(fwnode, NULL); + if (!ep) + return -EPROBE_DEFER; + ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", &ext_clk); if (ret) { @@ -1344,10 +1436,6 @@ static int ov13b10_check_hwcfg(struct device *dev) return -EINVAL; } - ep = fwnode_graph_get_next_endpoint(fwnode, NULL); - if (!ep) - return -ENXIO; - ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg); fwnode_handle_put(ep); if (ret) @@ -1407,13 +1495,23 @@ static int ov13b10_probe(struct i2c_client *client) /* Initialize subdev */ v4l2_i2c_subdev_init(&ov13b->sd, client, &ov13b10_subdev_ops); + ret = ov13b10_get_pm_resources(&client->dev); + if (ret) + return ret; + full_power = acpi_dev_state_d0(&client->dev); if (full_power) { + ov13b10_power_on(&client->dev); + if (ret) { + dev_err(&client->dev, "failed to power on\n"); + return ret; + } + /* Check module identity */ ret = ov13b10_identify_module(ov13b); if (ret) { dev_err(&client->dev, "failed to find sensor: %d\n", ret); - return ret; + goto error_power_off; } } @@ -1422,7 +1520,7 @@ static int ov13b10_probe(struct i2c_client *client) ret = ov13b10_init_controls(ov13b); if (ret) - return ret; + goto error_power_off; /* Initialize subdev */ ov13b->sd.internal_ops = &ov13b10_internal_ops; @@ -1462,6 +1560,9 @@ error_handler_free: ov13b10_free_controls(ov13b); dev_err(&client->dev, "%s failed:%d\n", __func__, ret); +error_power_off: + ov13b10_power_off(&client->dev); + return ret; } @@ -1477,13 +1578,13 @@ static void ov13b10_remove(struct i2c_client *client) pm_runtime_disable(&client->dev); } -static const struct dev_pm_ops ov13b10_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(ov13b10_suspend, ov13b10_resume) -}; +static DEFINE_RUNTIME_DEV_PM_OPS(ov13b10_pm_ops, ov13b10_suspend, + ov13b10_resume, NULL); #ifdef CONFIG_ACPI static const struct acpi_device_id ov13b10_acpi_ids[] = { {"OVTIDB10"}, + {"OVTI13B1"}, { /* sentinel */ } }; @@ -1493,7 +1594,7 @@ MODULE_DEVICE_TABLE(acpi, ov13b10_acpi_ids); static struct i2c_driver ov13b10_i2c_driver = { .driver = { .name = "ov13b10", - .pm = &ov13b10_pm_ops, + .pm = pm_ptr(&ov13b10_pm_ops), .acpi_match_table = ACPI_PTR(ov13b10_acpi_ids), }, .probe = ov13b10_probe, |