during system-wide (static) suspend, we also
want to save our context and restore it when
waking up.
Let's introduce new suspend/resume methods so
that we can survive a suspend-to-ram transition.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/i2c/busses/i2c-omap.c | 60 +++++++++++++++++++++++++++++++++++--------
1 file changed, 50 insertions(+), 10 deletions(-)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 7eeae11..ceab138 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1236,13 +1236,8 @@ static int __devexit omap_i2c_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM
-#ifdef CONFIG_PM_RUNTIME
-static int omap_i2c_runtime_suspend(struct device *dev)
+static int omap_i2c_low_level_suspend(struct omap_i2c_dev *_dev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_i2c_dev *_dev = platform_get_drvdata(pdev);
- u16 iv;
-
_dev->iestate = omap_i2c_read_reg(_dev, OMAP_I2C_IE_REG);
omap_i2c_write_reg(_dev, OMAP_I2C_IE_REG, 0);
@@ -1253,11 +1248,8 @@ static int omap_i2c_runtime_suspend(struct device *dev)
return 0;
}
-static int omap_i2c_runtime_resume(struct device *dev)
+static int omap_i2c_low_level_resume(struct omap_i2c_dev *_dev)
{
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_i2c_dev *_dev = platform_get_drvdata(pdev);
-
if (_dev->flags & OMAP_I2C_FLAG_RESET_REGS_POSTIDLE) {
omap_i2c_write_reg(_dev, OMAP_I2C_CON_REG, 0);
omap_i2c_write_reg(_dev, OMAP_I2C_PSC_REG, _dev->pscstate);
@@ -1278,9 +1270,57 @@ static int omap_i2c_runtime_resume(struct device *dev)
return 0;
}
+
+static int omap_i2c_suspend(struct device *dev)
+{
+ struct omap_i2c_dev *_dev = dev_get_drvdata(dev);
+
+ if (pm_runtime_suspended(dev))
+ return 0;
+
+ return omap_i2c_low_level_suspend(_dev);
+}
+
+static int omap_i2c_resume(struct device *dev)
+{
+ struct omap_i2c_dev *_dev = dev_get_drvdata(dev);
+ int r;
+
+ r = omap_i2c_low_level_resume(_dev);
+ if (r)
+ return r;
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int omap_i2c_runtime_suspend(struct device *dev)
+{
+ struct omap_i2c_dev *_dev = dev_get_drvdata(dev);
+
+ return omap_i2c_low_level_suspend(_dev);
+}
+
+static int omap_i2c_runtime_resume(struct device *dev)
+{
+ struct omap_i2c_dev *_dev = dev_get_drvdata(dev);
+
+ return omap_i2c_low_level_resume(_dev);
+}
+#else
+#define omap_i2c_runtime_suspend NULL
+#define omap_i2c_runtime_resume NULL
#endif /* CONFIG_PM_RUNTIME */
static struct dev_pm_ops omap_i2c_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(omap_i2c_suspend,
+ omap_i2c_resume)
SET_RUNTIME_PM_OPS(omap_i2c_runtime_suspend,
omap_i2c_runtime_resume, NULL)
};
--
1.8.0.rc0
--
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