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OpenCloudOS-Kernel
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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>
This commit is contained in:
Felipe Balbi 2012-09-12 16:28:15 +05:30 committed by Wolfram Sang
parent e3a36b207f
commit 6d8451d55a
1 changed files with 10 additions and 2 deletions
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12
drivers/i2c/busses/i2c-omap.c
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@ -55,6 +55,9 @@
/* timeout waiting for the controller to respond */ /* timeout waiting for the controller to respond */
#define OMAP_I2C_TIMEOUT (msecs_to_jiffies(1000)) #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) */ /* For OMAP3 I2C_IV has changed to I2C_WE (wakeup enable) */
enum { enum {
OMAP_I2C_REV_REG = 0, 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); omap_i2c_wait_for_bb(dev);
out: out:
pm_runtime_put(dev->dev); pm_runtime_mark_last_busy(dev->dev);
pm_runtime_put_autosuspend(dev->dev);
return r; return r;
} }
@ -1113,6 +1117,9 @@ omap_i2c_probe(struct platform_device *pdev)
dev->regs = (u8 *)reg_map_ip_v1; dev->regs = (u8 *)reg_map_ip_v1;
pm_runtime_enable(dev->dev); 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); r = pm_runtime_get_sync(dev->dev);
if (IS_ERR_VALUE(r)) if (IS_ERR_VALUE(r))
goto err_free_mem; goto err_free_mem;
@ -1190,7 +1197,8 @@ omap_i2c_probe(struct platform_device *pdev)
of_i2c_register_devices(adap); 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; return 0;