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-rw-r--r--drivers/i2c/busses/i2c-cpm.c1
-rw-r--r--drivers/i2c/busses/i2c-pxa.c2
-rw-r--r--drivers/i2c/busses/i2c-s3c2410.c22
-rw-r--r--drivers/i2c/busses/i2c-sh_mobile.c73
4 files changed, 55 insertions, 43 deletions
diff --git a/drivers/i2c/busses/i2c-cpm.c b/drivers/i2c/busses/i2c-cpm.c
index 228f7572306..3fcf78e906d 100644
--- a/drivers/i2c/busses/i2c-cpm.c
+++ b/drivers/i2c/busses/i2c-cpm.c
@@ -365,6 +365,7 @@ static int cpm_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
pmsg = &msgs[tptr];
if (pmsg->flags & I2C_M_RD)
ret = wait_event_interruptible_timeout(cpm->i2c_wait,
+ (in_be16(&tbdf[tptr].cbd_sc) & BD_SC_NAK) ||
!(in_be16(&rbdf[rptr].cbd_sc) & BD_SC_EMPTY),
1 * HZ);
else
diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index 906f9b9d715..587f5b2380d 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -1016,7 +1016,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
snprintf(i2c->adap.name, sizeof(i2c->adap.name), "pxa_i2c-i2c.%u",
i2c->adap.nr);
- i2c->clk = clk_get(&dev->dev, "I2CCLK");
+ i2c->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(i2c->clk)) {
ret = PTR_ERR(i2c->clk);
goto eclk;
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 2a0de645ccf..f69f91ffb46 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -38,8 +38,8 @@
#include <asm/irq.h>
#include <asm/io.h>
-#include <asm/plat-s3c/regs-iic.h>
-#include <asm/plat-s3c/iic.h>
+#include <plat/regs-iic.h>
+#include <plat/iic.h>
/* i2c controller state */
@@ -54,6 +54,7 @@ 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;
@@ -476,7 +477,7 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c,
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);
@@ -957,17 +958,26 @@ 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
@@ -976,6 +986,7 @@ 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,
@@ -986,6 +997,7 @@ 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,
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c
index 3384a717fec..6c3d60b939b 100644
--- a/drivers/i2c/busses/i2c-sh_mobile.c
+++ b/drivers/i2c/busses/i2c-sh_mobile.c
@@ -160,9 +160,39 @@ struct sh_mobile_i2c_data {
static void activate_ch(struct sh_mobile_i2c_data *pd)
{
+ unsigned long i2c_clk;
+ u_int32_t num;
+ u_int32_t denom;
+ u_int32_t tmp;
+
/* Make sure the clock is enabled */
clk_enable(pd->clk);
+ /* Get clock rate after clock is enabled */
+ i2c_clk = clk_get_rate(pd->clk);
+
+ /* Calculate the value for iccl. From the data sheet:
+ * iccl = (p clock / transfer rate) * (L / (L + H))
+ * where L and H are the SCL low/high ratio (5/4 in this case).
+ * We also round off the result.
+ */
+ num = i2c_clk * 5;
+ denom = NORMAL_SPEED * 9;
+ tmp = num * 10 / denom;
+ if (tmp % 10 >= 5)
+ pd->iccl = (u_int8_t)((num/denom) + 1);
+ else
+ pd->iccl = (u_int8_t)(num/denom);
+
+ /* Calculate the value for icch. From the data sheet:
+ icch = (p clock / transfer rate) * (H / (L + H)) */
+ num = i2c_clk * 4;
+ tmp = num * 10 / denom;
+ if (tmp % 10 >= 5)
+ pd->icch = (u_int8_t)((num/denom) + 1);
+ else
+ pd->icch = (u_int8_t)(num/denom);
+
/* Enable channel and configure rx ack */
iowrite8(ioread8(ICCR(pd)) | ICCR_ICE, ICCR(pd));
@@ -459,40 +489,6 @@ static struct i2c_algorithm sh_mobile_i2c_algorithm = {
.master_xfer = sh_mobile_i2c_xfer,
};
-static void sh_mobile_i2c_setup_channel(struct platform_device *dev)
-{
- struct sh_mobile_i2c_data *pd = platform_get_drvdata(dev);
- unsigned long peripheral_clk = clk_get_rate(pd->clk);
- u_int32_t num;
- u_int32_t denom;
- u_int32_t tmp;
-
- spin_lock_init(&pd->lock);
- init_waitqueue_head(&pd->wait);
-
- /* Calculate the value for iccl. From the data sheet:
- * iccl = (p clock / transfer rate) * (L / (L + H))
- * where L and H are the SCL low/high ratio (5/4 in this case).
- * We also round off the result.
- */
- num = peripheral_clk * 5;
- denom = NORMAL_SPEED * 9;
- tmp = num * 10 / denom;
- if (tmp % 10 >= 5)
- pd->iccl = (u_int8_t)((num/denom) + 1);
- else
- pd->iccl = (u_int8_t)(num/denom);
-
- /* Calculate the value for icch. From the data sheet:
- icch = (p clock / transfer rate) * (H / (L + H)) */
- num = peripheral_clk * 4;
- tmp = num * 10 / denom;
- if (tmp % 10 >= 5)
- pd->icch = (u_int8_t)((num/denom) + 1);
- else
- pd->icch = (u_int8_t)(num/denom);
-}
-
static int sh_mobile_i2c_hook_irqs(struct platform_device *dev, int hook)
{
struct resource *res;
@@ -533,6 +529,7 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
struct sh_mobile_i2c_data *pd;
struct i2c_adapter *adap;
struct resource *res;
+ char clk_name[8];
int size;
int ret;
@@ -542,9 +539,10 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
return -ENOMEM;
}
- pd->clk = clk_get(&dev->dev, "peripheral_clk");
+ snprintf(clk_name, sizeof(clk_name), "i2c%d", dev->id);
+ pd->clk = clk_get(&dev->dev, clk_name);
if (IS_ERR(pd->clk)) {
- dev_err(&dev->dev, "cannot get peripheral clock\n");
+ dev_err(&dev->dev, "cannot get clock \"%s\"\n", clk_name);
ret = PTR_ERR(pd->clk);
goto err;
}
@@ -586,7 +584,8 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
strlcpy(adap->name, dev->name, sizeof(adap->name));
- sh_mobile_i2c_setup_channel(dev);
+ spin_lock_init(&pd->lock);
+ init_waitqueue_head(&pd->wait);
ret = i2c_add_numbered_adapter(adap);
if (ret < 0) {
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 15:02:44 +0000