In case the PM core is able to use the direct_complete path during system
sleep for the i2c device, the device is runtime resumed in the ->complete()
callback. For ACPI platforms this is needed to synchronize the power state
of the device, while for non-ACPI platforms this is a waste.
To better deal with this, let's drop the ->complete() callback from the
i2c-dw-plat driver altogether, thus avoiding the runtime resume of the
device.
This change still plays well for the ACPI case, because the ACPI PM
domain's ->complete() callback, assigned to acpi_subsys_complete(), already
deals with runtime resuming the device in case it's needed.
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
Changes in v2:
- New patch.
---
drivers/i2c/busses/i2c-designware-platdrv.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 441afc7..fc6b99f 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -418,15 +418,8 @@ static int dw_i2c_plat_prepare(struct device *dev)
{
return pm_runtime_suspended(dev);
}
-
-static void dw_i2c_plat_complete(struct device *dev)
-{
- if (dev->power.direct_complete)
- pm_request_resume(dev);
-}
#else
#define dw_i2c_plat_prepare NULL
-#define dw_i2c_plat_complete NULL
#endif
#ifdef CONFIG_PM
@@ -462,7 +455,6 @@ static int dw_i2c_plat_suspend(struct device *dev)
static const struct dev_pm_ops dw_i2c_dev_pm_ops = {
.prepare = dw_i2c_plat_prepare,
- .complete = dw_i2c_plat_complete,
SET_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume)
SET_RUNTIME_PM_OPS(dw_i2c_plat_runtime_suspend,
dw_i2c_plat_resume,
--
2.7.4
