i2c-designware: Add runtime power management support
Add runtime power management to the PCI driver.
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/drivers/i2c/busses/i2c-designware-core.c b/drivers/i2c/busses/i2c-designware-core.c
index b9f18dd..df87992 100644
--- a/drivers/i2c/busses/i2c-designware-core.c
+++ b/drivers/i2c/busses/i2c-designware-core.c
@@ -31,6 +31,7 @@
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/io.h>
+#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include "i2c-designware-core.h"
@@ -501,6 +502,7 @@
dev_dbg(dev->dev, "%s: msgs: %d\n", __func__, num);
mutex_lock(&dev->lock);
+ pm_runtime_get_sync(dev->dev);
INIT_COMPLETION(dev->cmd_complete);
dev->msgs = msgs;
@@ -550,6 +552,7 @@
ret = -EIO;
done:
+ pm_runtime_put(dev->dev);
mutex_unlock(&dev->lock);
return ret;
@@ -671,10 +674,13 @@
dw_writel(dev, 1, DW_IC_ENABLE);
}
+u32 i2c_dw_is_enabled(struct dw_i2c_dev *dev)
+{
+ return dw_readl(dev, DW_IC_ENABLE);
+}
+
void i2c_dw_disable(struct dw_i2c_dev *dev)
{
- int ret;
-
/* Disable controller */
dw_writel(dev, 0, DW_IC_ENABLE);