1 files changed, 28 insertions, 7 deletions

diff --git a/drivers/acpi/acpi_lpss.c b/drivers/acpi/acpi_lpss.c
index 4804ae31b057..d1dd0ada14b7 100644
--- a/drivers/acpi/acpi_lpss.c
+++ b/drivers/acpi/acpi_lpss.c
@@ -1,7 +1,7 @@
 /*
  * ACPI support for Intel Lynxpoint LPSS.
  *
- * Copyright (C) 2013, Intel Corporation
+ * Copyright (C) 2013, 2014, Intel Corporation
  * Authors: Mika Westerberg <mika.westerberg@linux.intel.com>
  *          Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  *
@@ -60,6 +60,8 @@ ACPI_MODULE_NAME("acpi_lpss");
 #define LPSS_CLK_DIVIDER                BIT(2)
 #define LPSS_LTR                        BIT(3)
 #define LPSS_SAVE_CTX                   BIT(4)
+#define LPSS_DEV_PROXY                  BIT(5)
+#define LPSS_PROXY_REQ                  BIT(6)
 
 struct lpss_private_data;
 
@@ -70,8 +72,10 @@ struct lpss_device_desc {
         void (*setup)(struct lpss_private_data *pdata);
 };
 
+static struct device *proxy_device;
+
 static struct lpss_device_desc lpss_dma_desc = {
-        .flags = LPSS_CLK,
+        .flags = LPSS_CLK | LPSS_PROXY_REQ,
 };
 
 struct lpss_private_data {
@@ -146,22 +150,24 @@ static struct lpss_device_desc byt_pwm_dev_desc = {
 };
 
 static struct lpss_device_desc byt_uart_dev_desc = {
-        .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX,
+        .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX |
+                 LPSS_DEV_PROXY,
         .prv_offset = 0x800,
         .setup = lpss_uart_setup,
 };
 
 static struct lpss_device_desc byt_spi_dev_desc = {
-        .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX,
+        .flags = LPSS_CLK | LPSS_CLK_GATE | LPSS_CLK_DIVIDER | LPSS_SAVE_CTX |
+                 LPSS_DEV_PROXY,
         .prv_offset = 0x400,
 };
 
 static struct lpss_device_desc byt_sdio_dev_desc = {
-        .flags = LPSS_CLK,
+        .flags = LPSS_CLK | LPSS_DEV_PROXY,
 };
 
 static struct lpss_device_desc byt_i2c_dev_desc = {
-        .flags = LPSS_CLK | LPSS_SAVE_CTX,
+        .flags = LPSS_CLK | LPSS_SAVE_CTX | LPSS_DEV_PROXY,
         .prv_offset = 0x800,
         .setup = byt_i2c_setup,
 };
@@ -368,6 +374,8 @@ static int acpi_lpss_create_device(struct acpi_device *adev,
         adev->driver_data = pdata;
         pdev = acpi_create_platform_device(adev);
         if (!IS_ERR_OR_NULL(pdev)) {
+                if (!proxy_device && dev_desc->flags & LPSS_DEV_PROXY)
+                        proxy_device = &pdev->dev;
                 return 1;
         }
 
@@ -593,7 +601,14 @@ static int acpi_lpss_runtime_suspend(struct device *dev)
         if (pdata->dev_desc->flags & LPSS_SAVE_CTX)
                 acpi_lpss_save_ctx(dev, pdata);
 
-        return acpi_dev_runtime_suspend(dev);
+        ret = acpi_dev_runtime_suspend(dev);
+        if (ret)
+                return ret;
+
+        if (pdata->dev_desc->flags & LPSS_PROXY_REQ && proxy_device)
+                return pm_runtime_put_sync_suspend(proxy_device);
+
+        return 0;
 }
 
 static int acpi_lpss_runtime_resume(struct device *dev)
@@ -601,6 +616,12 @@ static int acpi_lpss_runtime_resume(struct device *dev)
         struct lpss_private_data *pdata = acpi_driver_data(ACPI_COMPANION(dev));
         int ret;
 
+        if (pdata->dev_desc->flags & LPSS_PROXY_REQ && proxy_device) {
+                ret = pm_runtime_get_sync(proxy_device);
+                if (ret)
+                        return ret;
+        }
+
         ret = acpi_dev_runtime_resume(dev);
         if (ret)
                 return ret;