The purpose of lpss_iosf_exit_d3_state is to ensure that the LPSS DMA
controllers are in D0 and will not automatically power-down.
Since we do not know what the state is when activating a device, we
should call lpss_iosf_exit_d3_state on activate too.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/acpi/acpi_lpss.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 43f376aa7adc..51feee309b13 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -97,6 +97,8 @@ struct lpss_private_data {
u32 prv_reg_ctx[LPSS_PRV_REG_COUNT];
};
+static void lpss_iosf_exit_d3_state(void);
+
/* LPSS run time quirks */
static unsigned int lpss_quirks;
@@ -682,6 +684,9 @@ static int acpi_lpss_activate(struct device *dev)
struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
int ret;
+ if (lpss_quirks & LPSS_QUIRK_ALWAYS_POWER_ON && iosf_mbi_available())
+ lpss_iosf_exit_d3_state();
+
ret = acpi_dev_runtime_resume(dev);
if (ret)
return ret;
--
2.13.0
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
