From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: linux-acpi@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [PATCH v2 4/5] media: i2c: imx319: Support probe while the device is off
Date: Mon, 26 Aug 2019 11:31:11 +0300 [thread overview]
Message-ID: <20190826083112.8888-5-sakari.ailus@linux.intel.com> (raw)
In-Reply-To: <20190826083112.8888-1-sakari.ailus@linux.intel.com>
From: Rajmohan Mani <rajmohan.mani@intel.com>
Tell ACPI device PM code that the driver supports the device being powered
off when the driver's probe function is entered.
Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
drivers/media/i2c/imx319.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/drivers/media/i2c/imx319.c b/drivers/media/i2c/imx319.c
index 17c2e4b41221e..1a01946f4d5bf 100644
--- a/drivers/media/i2c/imx319.c
+++ b/drivers/media/i2c/imx319.c
@@ -2424,6 +2424,7 @@ static struct imx319_hwcfg *imx319_get_hwcfg(struct device *dev)
static int imx319_probe(struct i2c_client *client)
{
struct imx319 *imx319;
+ bool low_power;
int ret;
u32 i;
@@ -2436,11 +2437,14 @@ static int imx319_probe(struct i2c_client *client)
/* Initialize subdev */
v4l2_i2c_subdev_init(&imx319->sd, client, &imx319_subdev_ops);
- /* Check module identity */
- ret = imx319_identify_module(imx319);
- if (ret) {
- dev_err(&client->dev, "failed to find sensor: %d", ret);
- goto error_probe;
+ low_power = acpi_dev_low_power_state_probe(&client->dev);
+ if (!low_power) {
+ /* Check module identity */
+ ret = imx319_identify_module(imx319);
+ if (ret) {
+ dev_err(&client->dev, "failed to find sensor: %d", ret);
+ goto error_probe;
+ }
}
imx319->hwcfg = imx319_get_hwcfg(&client->dev);
@@ -2493,10 +2497,10 @@ static int imx319_probe(struct i2c_client *client)
goto error_media_entity;
/*
- * Device is already turned on by i2c-core with ACPI domain PM.
- * Enable runtime PM and turn off the device.
+ * Don't set the device's state to active if it's in a low power state.
*/
- pm_runtime_set_active(&client->dev);
+ if (!low_power)
+ pm_runtime_set_active(&client->dev);
pm_runtime_enable(&client->dev);
pm_runtime_idle(&client->dev);
@@ -2536,7 +2540,7 @@ static const struct dev_pm_ops imx319_pm_ops = {
};
static const struct acpi_device_id imx319_acpi_ids[] = {
- { "SONY319A" },
+ { "SONY319A", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(acpi, imx319_acpi_ids);
@@ -2544,6 +2548,7 @@ MODULE_DEVICE_TABLE(acpi, imx319_acpi_ids);
static struct i2c_driver imx319_i2c_driver = {
.driver = {
.name = "imx319",
+ .probe_low_power = true,
.pm = &imx319_pm_ops,
.acpi_match_table = ACPI_PTR(imx319_acpi_ids),
},
--
2.20.1
next prev parent reply other threads:[~2019-08-26 8:32 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-26 8:31 [PATCH v2 0/5] Support running driver's probe for a device powered off Sakari Ailus
2019-08-26 8:31 ` [PATCH v2 1/5] ACPI: Enable driver and firmware hints to control power at probe time Sakari Ailus
2019-08-26 8:43 ` Greg Kroah-Hartman
2019-08-26 10:32 ` Sakari Ailus
2019-08-26 13:34 ` Greg Kroah-Hartman
2019-08-26 13:51 ` Sakari Ailus
2019-08-28 8:55 ` Rafael J. Wysocki
2019-08-28 9:57 ` Sakari Ailus
2019-08-28 12:35 ` Rafael J. Wysocki
2019-08-26 8:46 ` Greg Kroah-Hartman
2019-08-26 10:29 ` Sakari Ailus
2019-08-26 8:31 ` [PATCH v2 2/5] ACPI: Add a convenience function to tell a device is suspended in probe Sakari Ailus
2019-08-26 8:31 ` [PATCH v2 3/5] ov5670: Support probe whilst the device is in a low power state Sakari Ailus
2019-08-26 8:31 ` Sakari Ailus [this message]
2019-08-26 8:31 ` [PATCH v2 5/5] at24: Support probing while off Sakari Ailus
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