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authorFelipe Balbi <balbi@ti.com>2012-09-12 14:58:15 +0400
committerWolfram Sang <w.sang@pengutronix.de>2012-09-12 17:04:10 +0400
commit6d8451d55a2a9467bc9647aafe8b6faee0251687 (patch)
tree43cc514aefef7427a5047a7f366f2e463247b4b4 /drivers/i2c/busses/i2c-omap.c
parente3a36b207f76364c281aeecaf14c1b22a7247278 (diff)
downloadlinux-6d8451d55a2a9467bc9647aafe8b6faee0251687.tar.xz
i2c: omap: switch over to autosuspend API
this helps us reduce unnecessary pm transitions in case we have another i2c message starting soon. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/i2c/busses/i2c-omap.c')
-rw-r--r--drivers/i2c/busses/i2c-omap.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 6d38a570dc12..122f517c5bcb 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -55,6 +55,9 @@
/* timeout waiting for the controller to respond */
#define OMAP_I2C_TIMEOUT (msecs_to_jiffies(1000))
+/* timeout for pm runtime autosuspend */
+#define OMAP_I2C_PM_TIMEOUT 1000 /* ms */
+
/* For OMAP3 I2C_IV has changed to I2C_WE (wakeup enable) */
enum {
OMAP_I2C_REV_REG = 0,
@@ -645,7 +648,8 @@ omap_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
omap_i2c_wait_for_bb(dev);
out:
- pm_runtime_put(dev->dev);
+ pm_runtime_mark_last_busy(dev->dev);
+ pm_runtime_put_autosuspend(dev->dev);
return r;
}
@@ -1113,6 +1117,9 @@ omap_i2c_probe(struct platform_device *pdev)
dev->regs = (u8 *)reg_map_ip_v1;
pm_runtime_enable(dev->dev);
+ pm_runtime_set_autosuspend_delay(dev->dev, OMAP_I2C_PM_TIMEOUT);
+ pm_runtime_use_autosuspend(dev->dev);
+
r = pm_runtime_get_sync(dev->dev);
if (IS_ERR_VALUE(r))
goto err_free_mem;
@@ -1190,7 +1197,8 @@ omap_i2c_probe(struct platform_device *pdev)
of_i2c_register_devices(adap);
- pm_runtime_put(dev->dev);
+ pm_runtime_mark_last_busy(dev->dev);
+ pm_runtime_put_autosuspend(dev->dev);
return 0;