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authorMika Westerberg <mika.westerberg@linux.intel.com>2013-04-10 00:36:42 +0000
committerWolfram Sang <wsa@the-dreams.de>2013-04-15 18:18:45 +0200
commit43452335224bc0cbd605c6aee82b5c9c33e94cc6 (patch)
treeb63a20048c0ae7527103035f6656b7f5ff8d533f /drivers/i2c/busses
parent1451b91ffef5a2ac7df28a6d8fc270ccbee5d8ac (diff)
downloadvexpress-lsk-43452335224bc0cbd605c6aee82b5c9c33e94cc6.tar.gz
i2c-designware: switch to use runtime PM autosuspend
Using autosuspend helps to reduce the resume latency in situations where another I2C message is going to be started soon. For example with HID over I2C touch panels we get several messages in a short period of time while the touch panel is in use. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses')
-rw-r--r--drivers/i2c/busses/i2c-designware-core.c3
-rw-r--r--drivers/i2c/busses/i2c-designware-pcidrv.c3
-rw-r--r--drivers/i2c/busses/i2c-designware-platdrv.c3
3 files changed, 6 insertions, 3 deletions
diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
index 7c10c5bd36d..21fbb340ad6 100644
--- a/drivers/i2c/busses/i2c-designware-core.c
+++ b/drivers/i2c/busses/i2c-designware-core.c
@@ -600,7 +600,8 @@ i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
ret = -EIO;
done:
- pm_runtime_put(dev->dev);
+ pm_runtime_mark_last_busy(dev->dev);
+ pm_runtime_put_autosuspend(dev->dev);
mutex_unlock(&dev->lock);
return ret;
diff --git a/drivers/i2c/busses/i2c-designware-pcidrv.c b/drivers/i2c/busses/i2c-designware-pcidrv.c
index aacb64e916a..c8797e22459 100644
--- a/drivers/i2c/busses/i2c-designware-pcidrv.c
+++ b/drivers/i2c/busses/i2c-designware-pcidrv.c
@@ -291,7 +291,8 @@ static int i2c_dw_pci_probe(struct pci_dev *pdev,
/* Increase reference counter */
get_device(&pdev->dev);
- pm_runtime_put_noidle(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
+ pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_allow(&pdev->dev);
return 0;
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 2a596dd1ec6..dec939aca58 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -173,9 +173,10 @@ static int dw_i2c_probe(struct platform_device *pdev)
/* Increase reference counter */
get_device(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
+ pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
- pm_runtime_put(&pdev->dev);
return 0;
}