this helps us reduce unnecessary pm transitions
in case we have another i2c message starting soon.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/i2c/busses/i2c-omap.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 60928f2..35e8207 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;
@@ -1189,7 +1196,8 @@ 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;
--
1.7.12.rc0
--
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