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Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1006-fix-i2c-s3c2410-resume-race.patch.patch')
-rw-r--r--target/linux/s3c24xx/patches-2.6.24/1006-fix-i2c-s3c2410-resume-race.patch.patch115
1 files changed, 0 insertions, 115 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1006-fix-i2c-s3c2410-resume-race.patch.patch b/target/linux/s3c24xx/patches-2.6.24/1006-fix-i2c-s3c2410-resume-race.patch.patch
deleted file mode 100644
index 720608e..0000000
--- a/target/linux/s3c24xx/patches-2.6.24/1006-fix-i2c-s3c2410-resume-race.patch.patch
+++ /dev/null
@@ -1,115 +0,0 @@
-From d3063c1ec65b37b45e808313133196185ea4901f Mon Sep 17 00:00:00 2001
-From: mokopatches <mokopatches@openmoko.org>
-Date: Fri, 4 Apr 2008 11:30:03 +0100
-Subject: [PATCH] fix-i2c-s3c2410-resume-race.patch
- fix-i2c-s3c2410-resume-race.patch
-
-There is a nasty race between i2c-s3c2410 resume and resume of I2C
-driver and the client drivers -- the watchdog device actually gets to
-use the dead I2C bus before it is reinitialized by the I2C driver
-resume! This patch makes sure any customers get turned away until
-the shopkeeper has woken up.
-
-Signed-off-by: Andy Green <andy@openmoko.com>
----
- drivers/i2c/busses/i2c-s3c2410.c | 35 ++++++++++++++++++++++++++++++++++-
- 1 files changed, 34 insertions(+), 1 deletions(-)
-
-diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
-index c44ada5..5ac8309 100644
---- a/drivers/i2c/busses/i2c-s3c2410.c
-+++ b/drivers/i2c/busses/i2c-s3c2410.c
-@@ -71,6 +71,8 @@ struct s3c24xx_i2c {
- struct resource *irq;
- struct resource *ioarea;
- struct i2c_adapter adap;
-+
-+ int suspended;
- };
-
- /* default platform data to use if not supplied in the platform_device
-@@ -156,6 +158,14 @@ static inline void s3c24xx_i2c_disable_irq(struct s3c24xx_i2c *i2c)
- unsigned long tmp;
-
- tmp = readl(i2c->regs + S3C2410_IICCON);
-+
-+/* S3c2442 datasheet
-+ *
-+ * If the IICCON[5]=0, IICCON[4] does not operate correctly.
-+ * So, It is recommended that you should set IICCON[5]=1,
-+ * although you does not use the IIC interrupt.
-+ */
-+
- writel(tmp & ~S3C2410_IICCON_IRQEN, i2c->regs + S3C2410_IICCON);
- }
-
-@@ -282,7 +292,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
-
- case STATE_STOP:
- dev_err(i2c->dev, "%s: called in STATE_STOP\n", __FUNCTION__);
-- s3c24xx_i2c_disable_irq(i2c);
-+ s3c24xx_i2c_disable_irq(i2c);
- goto out_ack;
-
- case STATE_START:
-@@ -502,6 +512,14 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int
- unsigned long timeout;
- int ret;
-
-+ if (i2c->suspended) {
-+ dev_err(i2c->dev,
-+ "Hey I am still asleep (suspended: %d), retry later\n",
-+ i2c->suspended);
-+ ret = -EAGAIN;
-+ goto out;
-+ }
-+
- ret = s3c24xx_i2c_set_master(i2c);
- if (ret != 0) {
- dev_err(i2c->dev, "cannot get bus (error %d)\n", ret);
-@@ -886,6 +904,17 @@ static int s3c24xx_i2c_remove(struct platform_device *pdev)
- }
-
- #ifdef CONFIG_PM
-+
-+static int s3c24xx_i2c_suspend(struct platform_device *dev, pm_message_t state)
-+{
-+ struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
-+
-+ if (i2c != NULL)
-+ i2c->suspended++;
-+
-+ return 0;
-+}
-+
- static int s3c24xx_i2c_resume(struct platform_device *dev)
- {
- struct s3c24xx_i2c *i2c = platform_get_drvdata(dev);
-@@ -893,6 +922,8 @@ static int s3c24xx_i2c_resume(struct platform_device *dev)
- if (i2c != NULL)
- s3c24xx_i2c_init(i2c);
-
-+ i2c->suspended--;
-+
- return 0;
- }
-
-@@ -905,6 +936,7 @@ 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 = s3c24xx_i2c_suspend,
- .resume = s3c24xx_i2c_resume,
- .driver = {
- .owner = THIS_MODULE,
-@@ -915,6 +947,7 @@ static struct platform_driver s3c2410_i2c_driver = {
- static struct platform_driver s3c2440_i2c_driver = {
- .probe = s3c24xx_i2c_probe,
- .remove = s3c24xx_i2c_remove,
-+ .suspend = s3c24xx_i2c_suspend,
- .resume = s3c24xx_i2c_resume,
- .driver = {
- .owner = THIS_MODULE,
---
-1.5.6.5
-