struct gmin_subdev {
struct v4l2_subdev *subdev;
enum clock_rate clock_src;
- bool clock_on;
struct clk *pmc_clk;
struct gpio_desc *gpio0;
struct gpio_desc *gpio1;
unsigned int csi_lanes;
enum atomisp_input_format csi_fmt;
enum atomisp_bayer_order csi_bayer;
+
+ bool clock_on;
bool v1p8_on;
bool v2p8_on;
bool v1p2_on;
} pmic_id;
static const char *pmic_name[] = {
- [PMIC_UNSET] = "unset",
+ [PMIC_UNSET] = "ACPI device PM",
[PMIC_REGULATOR] = "regulator driver",
[PMIC_AXP] = "XPower AXP288 PMIC",
[PMIC_TI] = "Dollar Cove TI PMIC",
gs->gpio1 = NULL;
/*
- * FIXME: the code below doesn't rely on ACPI device_pm.c code to
- * set clocks and do power management.
+ * FIXME:
+ *
+ * The ACPI handling code checks for the _PR? tables in order to
+ * know what is required to switch the device from power state
+ * D0 (_PR0) up to D3COLD (_PR3).
+ *
+ * The adev->flags.power_manageable is set to true if the device
+ * has a _PR0 table, which can be checked by calling
+ * acpi_device_power_manageable(adev).
+ *
+ * However, this only says that the device can be set to power off
+ * mode.
+ *
+ * At least on the DSDT tables we've seen so far, there's no _PR3,
+ * nor _PS3 (which would have a somewhat similar effect).
+ * So, using ACPI for power management won't work, except if adding
+ * an ACPI override logic somewhere.
+ *
+ * So, at least for the existing devices we know, the check below
+ * will always be false.
+ */
+ if (acpi_device_can_wakeup(adev) &&
+ acpi_device_can_poweroff(adev)) {
+ dev_info(dev,
+ "gmin: power management provided via device PM\n");
+
+ return gs;
+ }
+
+ /*
+ * The code below is here due to backward compatibility with devices
+ * whose ACPI BIOS may not contain everything that would be needed
+ * in order to set clocks and do power management.
*/
if (!pmic_id) {
return -EINVAL;
}
+static int gmin_acpi_pm_ctrl(struct v4l2_subdev *subdev, int on)
+{
+ int ret = 0;
+ struct gmin_subdev *gs = find_gmin_subdev(subdev);
+ struct i2c_client *client = v4l2_get_subdevdata(subdev);
+ struct acpi_device *adev = ACPI_COMPANION(&client->dev);
+
+ /* Use the ACPI power management to control it */
+ on = !!on;
+ if (gs->clock_on == on)
+ return 0;
+
+ dev_dbg(subdev->dev, "Setting power state to %s\n",
+ on ? "on" : "off");
+
+ if (on)
+ ret = acpi_device_set_power(adev,
+ ACPI_STATE_D0);
+ else
+ ret = acpi_device_set_power(adev,
+ ACPI_STATE_D3_COLD);
+
+ if (!ret)
+ gs->clock_on = on;
+ else
+ dev_err(subdev->dev, "Couldn't set power state to %s\n",
+ on ? "on" : "off");
+
+ return ret;
+}
+
static int gmin_flisclk_ctrl(struct v4l2_subdev *subdev, int on)
{
int ret = 0;
return NULL;
}
-static struct camera_sensor_platform_data gmin_plat = {
+static struct camera_sensor_platform_data pmic_gmin_plat = {
.gpio0_ctrl = gmin_gpio0_ctrl,
.gpio1_ctrl = gmin_gpio1_ctrl,
.v1p8_ctrl = gmin_v1p8_ctrl,
.get_vcm_ctrl = gmin_get_vcm_ctrl,
};
+static struct camera_sensor_platform_data acpi_gmin_plat = {
+ .gpio0_ctrl = gmin_gpio0_ctrl,
+ .gpio1_ctrl = gmin_gpio1_ctrl,
+ .v1p8_ctrl = gmin_acpi_pm_ctrl,
+ .v2p8_ctrl = gmin_acpi_pm_ctrl,
+ .v1p2_ctrl = gmin_acpi_pm_ctrl,
+ .flisclk_ctrl = gmin_acpi_pm_ctrl,
+ .csi_cfg = gmin_csi_cfg,
+ .get_vcm_ctrl = gmin_get_vcm_ctrl,
+};
+
struct camera_sensor_platform_data *gmin_camera_platform_data(
struct v4l2_subdev *subdev,
enum atomisp_input_format csi_format,
gs->csi_fmt = csi_format;
gs->csi_bayer = csi_bayer;
- return &gmin_plat;
+ if (gs->pmc_clk)
+ return &pmic_gmin_plat;
+ else
+ return &acpi_gmin_plat;
}
EXPORT_SYMBOL_GPL(gmin_camera_platform_data);