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path: root/drivers/i2c/busses/i2c-s3c2410.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-s3c2410.c')
-rw-r--r--drivers/i2c/busses/i2c-s3c2410.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 1fac4e23313..b7434d24904 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -56,6 +56,7 @@ enum s3c24xx_i2c_state {
struct s3c24xx_i2c {
spinlock_t lock;
wait_queue_head_t wait;
+ unsigned int suspended:1;
struct i2c_msg *msg;
unsigned int msg_num;
@@ -507,7 +508,7 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int
unsigned long timeout;
int ret;
- if (!(readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN))
+ if (i2c->suspended)
return -EIO;
ret = s3c24xx_i2c_set_master(i2c);
@@ -986,17 +987,26 @@ static int s3c24xx_i2c_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM
+static int s3c24xx_i2c_suspend_late(struct platform_device *dev,
+ pm_message_t msg)
+{
+ struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
+ i2c->suspended = 1;
+ return 0;
+}
+
static int s3c24xx_i2c_resume(struct platform_device *dev)
{
struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
- if (i2c != NULL)
- s3c24xx_i2c_init(i2c);
+ i2c->suspended = 0;
+ s3c24xx_i2c_init(i2c);
return 0;
}
#else
+#define s3c24xx_i2c_suspend_late NULL
#define s3c24xx_i2c_resume NULL
#endif
@@ -1005,6 +1015,7 @@ static int s3c24xx_i2c_resume(struct platform_device *dev)
static struct platform_driver s3c2410_i2c_driver = {
.probe = s3c24xx_i2c_probe,
.remove = s3c24xx_i2c_remove,
+ .suspend_late = s3c24xx_i2c_suspend_late,
.resume = s3c24xx_i2c_resume,
.driver = {
.owner = THIS_MODULE,
@@ -1015,6 +1026,7 @@ static struct platform_driver s3c2410_i2c_driver = {
static struct platform_driver s3c2440_i2c_driver = {
.probe = s3c24xx_i2c_probe,
.remove = s3c24xx_i2c_remove,
+ .suspend_late = s3c24xx_i2c_suspend_late,
.resume = s3c24xx_i2c_resume,
.driver = {
.owner = THIS_MODULE,