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Diffstat (limited to 'drivers/i2c/busses/i2c-s3c2410.c')
-rw-r--r--drivers/i2c/busses/i2c-s3c2410.c88
1 files changed, 44 insertions, 44 deletions
diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
index 1fac4e23313..f5efece9b16 100644
--- a/drivers/i2c/busses/i2c-s3c2410.c
+++ b/drivers/i2c/busses/i2c-s3c2410.c
@@ -109,7 +109,8 @@ static inline int s3c24xx_i2c_is2440(struct s3c24xx_i2c *i2c)
* the default if there is none
*/
-static inline struct s3c2410_platform_i2c *s3c24xx_i2c_get_platformdata(struct device *dev)
+static inline struct s3c2410_platform_i2c *
+s3c24xx_i2c_get_platformdata(struct device *dev)
{
if (dev->platform_data != NULL)
return (struct s3c2410_platform_i2c *)dev->platform_data;
@@ -129,7 +130,7 @@ static inline void s3c24xx_i2c_master_complete(struct s3c24xx_i2c *i2c, int ret)
i2c->msg_ptr = 0;
i2c->msg = NULL;
- i2c->msg_idx ++;
+ i2c->msg_idx++;
i2c->msg_num = 0;
if (ret)
i2c->msg_idx = ret;
@@ -140,19 +141,17 @@ static inline void s3c24xx_i2c_master_complete(struct s3c24xx_i2c *i2c, int ret)
static inline void s3c24xx_i2c_disable_ack(struct s3c24xx_i2c *i2c)
{
unsigned long tmp;
-
+
tmp = readl(i2c->regs + S3C2410_IICCON);
writel(tmp & ~S3C2410_IICCON_ACKEN, i2c->regs + S3C2410_IICCON);
-
}
static inline void s3c24xx_i2c_enable_ack(struct s3c24xx_i2c *i2c)
{
unsigned long tmp;
-
+
tmp = readl(i2c->regs + S3C2410_IICCON);
writel(tmp | S3C2410_IICCON_ACKEN, i2c->regs + S3C2410_IICCON);
-
}
/* irq enable/disable functions */
@@ -160,7 +159,7 @@ static inline void s3c24xx_i2c_enable_ack(struct s3c24xx_i2c *i2c)
static inline void s3c24xx_i2c_disable_irq(struct s3c24xx_i2c *i2c)
{
unsigned long tmp;
-
+
tmp = readl(i2c->regs + S3C2410_IICCON);
writel(tmp & ~S3C2410_IICCON_IRQEN, i2c->regs + S3C2410_IICCON);
}
@@ -168,7 +167,7 @@ static inline void s3c24xx_i2c_disable_irq(struct s3c24xx_i2c *i2c)
static inline void s3c24xx_i2c_enable_irq(struct s3c24xx_i2c *i2c)
{
unsigned long tmp;
-
+
tmp = readl(i2c->regs + S3C2410_IICCON);
writel(tmp | S3C2410_IICCON_IRQEN, i2c->regs + S3C2410_IICCON);
}
@@ -176,10 +175,10 @@ static inline void s3c24xx_i2c_enable_irq(struct s3c24xx_i2c *i2c)
/* s3c24xx_i2c_message_start
*
- * put the start of a message onto the bus
+ * put the start of a message onto the bus
*/
-static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c,
+static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c,
struct i2c_msg *msg)
{
unsigned int addr = (msg->addr & 0x7f) << 1;
@@ -198,15 +197,15 @@ static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c,
if (msg->flags & I2C_M_REV_DIR_ADDR)
addr ^= 1;
- // todo - check for wether ack wanted or not
+ /* todo - check for wether ack wanted or not */
s3c24xx_i2c_enable_ack(i2c);
iiccon = readl(i2c->regs + S3C2410_IICCON);
writel(stat, i2c->regs + S3C2410_IICSTAT);
-
+
dev_dbg(i2c->dev, "START: %08lx to IICSTAT, %02x to DS\n", stat, addr);
writeb(addr, i2c->regs + S3C2410_IICDS);
-
+
/* delay here to ensure the data byte has gotten onto the bus
* before the transaction is started */
@@ -214,8 +213,8 @@ static void s3c24xx_i2c_message_start(struct s3c24xx_i2c *i2c,
dev_dbg(i2c->dev, "iiccon, %08lx\n", iiccon);
writel(iiccon, i2c->regs + S3C2410_IICCON);
-
- stat |= S3C2410_IICSTAT_START;
+
+ stat |= S3C2410_IICSTAT_START;
writel(stat, i2c->regs + S3C2410_IICSTAT);
}
@@ -226,11 +225,11 @@ static inline void s3c24xx_i2c_stop(struct s3c24xx_i2c *i2c, int ret)
dev_dbg(i2c->dev, "STOP\n");
/* stop the transfer */
- iicstat &= ~ S3C2410_IICSTAT_START;
+ iicstat &= ~S3C2410_IICSTAT_START;
writel(iicstat, i2c->regs + S3C2410_IICSTAT);
-
+
i2c->state = STATE_STOP;
-
+
s3c24xx_i2c_master_complete(i2c, ret);
s3c24xx_i2c_disable_irq(i2c);
}
@@ -240,7 +239,7 @@ static inline void s3c24xx_i2c_stop(struct s3c24xx_i2c *i2c, int ret)
/* is_lastmsg()
*
- * returns TRUE if the current message is the last in the set
+ * returns TRUE if the current message is the last in the set
*/
static inline int is_lastmsg(struct s3c24xx_i2c *i2c)
@@ -288,14 +287,14 @@ 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", __func__);
- s3c24xx_i2c_disable_irq(i2c);
+ s3c24xx_i2c_disable_irq(i2c);
goto out_ack;
case STATE_START:
/* last thing we did was send a start condition on the
* bus, or started a new i2c message
*/
-
+
if (iicstat & S3C2410_IICSTAT_LASTBIT &&
!(i2c->msg->flags & I2C_M_IGNORE_NAK)) {
/* ack was not received... */
@@ -321,7 +320,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
if (i2c->state == STATE_READ)
goto prepare_read;
- /* fall through to the write state, as we will need to
+ /* fall through to the write state, as we will need to
* send a byte as well */
case STATE_WRITE:
@@ -338,7 +337,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
}
}
- retry_write:
+ retry_write:
if (!is_msgend(i2c)) {
byte = i2c->msg->buf[i2c->msg_ptr++];
@@ -358,9 +357,9 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
dev_dbg(i2c->dev, "WRITE: Next Message\n");
i2c->msg_ptr = 0;
- i2c->msg_idx ++;
+ i2c->msg_idx++;
i2c->msg++;
-
+
/* check to see if we need to do another message */
if (i2c->msg->flags & I2C_M_NOSTART) {
@@ -374,7 +373,6 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
goto retry_write;
} else {
-
/* send the new start */
s3c24xx_i2c_message_start(i2c, i2c->msg);
i2c->state = STATE_START;
@@ -388,7 +386,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
break;
case STATE_READ:
- /* we have a byte of data in the data register, do
+ /* we have a byte of data in the data register, do
* something with it, and then work out wether we are
* going to do any more read/write
*/
@@ -396,13 +394,13 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
byte = readb(i2c->regs + S3C2410_IICDS);
i2c->msg->buf[i2c->msg_ptr++] = byte;
- prepare_read:
+ prepare_read:
if (is_msglast(i2c)) {
/* last byte of buffer */
if (is_lastmsg(i2c))
s3c24xx_i2c_disable_ack(i2c);
-
+
} else if (is_msgend(i2c)) {
/* ok, we've read the entire buffer, see if there
* is anything else we need to do */
@@ -428,7 +426,7 @@ static int i2s_s3c_irq_nextbyte(struct s3c24xx_i2c *i2c, unsigned long iicstat)
/* acknowlegde the IRQ and get back on with the work */
out_ack:
- tmp = readl(i2c->regs + S3C2410_IICCON);
+ tmp = readl(i2c->regs + S3C2410_IICCON);
tmp &= ~S3C2410_IICCON_IRQPEND;
writel(tmp, i2c->regs + S3C2410_IICCON);
out:
@@ -449,19 +447,19 @@ static irqreturn_t s3c24xx_i2c_irq(int irqno, void *dev_id)
status = readl(i2c->regs + S3C2410_IICSTAT);
if (status & S3C2410_IICSTAT_ARBITR) {
- // deal with arbitration loss
+ /* deal with arbitration loss */
dev_err(i2c->dev, "deal with arbitration loss\n");
}
if (i2c->state == STATE_IDLE) {
dev_dbg(i2c->dev, "IRQ: error i2c->state == IDLE\n");
- tmp = readl(i2c->regs + S3C2410_IICCON);
+ tmp = readl(i2c->regs + S3C2410_IICCON);
tmp &= ~S3C2410_IICCON_IRQPEND;
writel(tmp, i2c->regs + S3C2410_IICCON);
goto out;
}
-
+
/* pretty much this leaves us with the fact that we've
* transmitted or received whatever byte we last sent */
@@ -484,7 +482,7 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c)
while (timeout-- > 0) {
iicstat = readl(i2c->regs + S3C2410_IICSTAT);
-
+
if (!(iicstat & S3C2410_IICSTAT_BUSBUSY))
return 0;
@@ -502,7 +500,8 @@ static int s3c24xx_i2c_set_master(struct s3c24xx_i2c *i2c)
* this starts an i2c transfer
*/
-static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int num)
+static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c,
+ struct i2c_msg *msgs, int num)
{
unsigned long timeout;
int ret;
@@ -528,12 +527,12 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int
s3c24xx_i2c_enable_irq(i2c);
s3c24xx_i2c_message_start(i2c, msgs);
spin_unlock_irq(&i2c->lock);
-
+
timeout = wait_event_timeout(i2c->wait, i2c->msg_num == 0, HZ * 5);
ret = i2c->msg_idx;
- /* having these next two as dev_err() makes life very
+ /* having these next two as dev_err() makes life very
* noisy when doing an i2cdetect */
if (timeout == 0)
@@ -642,7 +641,7 @@ static inline int freq_acceptable(unsigned int freq, unsigned int wanted)
{
int diff = freq - wanted;
- return (diff >= -2 && diff <= 2);
+ return diff >= -2 && diff <= 2;
}
/* s3c24xx_i2c_clockrate
@@ -665,7 +664,7 @@ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got)
pdata = s3c24xx_i2c_get_platformdata(i2c->adap.dev.parent);
clkin /= 1000; /* clkin now in KHz */
-
+
dev_dbg(i2c->dev, "pdata %p, freq %lu %lu..%lu\n",
pdata, pdata->bus_freq, pdata->min_freq, pdata->max_freq);
@@ -773,7 +772,7 @@ static inline void s3c24xx_i2c_deregister_cpufreq(struct s3c24xx_i2c *i2c)
/* s3c24xx_i2c_init
*
- * initialise the controller, set the IO lines and frequency
+ * initialise the controller, set the IO lines and frequency
*/
static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c)
@@ -792,7 +791,7 @@ static int s3c24xx_i2c_init(struct s3c24xx_i2c *i2c)
s3c2410_gpio_cfgpin(S3C2410_GPE14, S3C2410_GPE14_IICSCL);
/* write slave address */
-
+
writeb(pdata->slave_addr, i2c->regs + S3C2410_IICADD);
dev_info(i2c->dev, "slave address 0x%02x\n", pdata->slave_addr);
@@ -877,7 +876,8 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
goto err_ioarea;
}
- dev_dbg(&pdev->dev, "registers %p (%p, %p)\n", i2c->regs, i2c->ioarea, res);
+ dev_dbg(&pdev->dev, "registers %p (%p, %p)\n",
+ i2c->regs, i2c->ioarea, res);
/* setup info block for the i2c core */
@@ -891,7 +891,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
goto err_iomap;
/* find the IRQ for this unit (note, this relies on the init call to
- * ensure no current IRQs pending
+ * ensure no current IRQs pending
*/
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
@@ -910,7 +910,7 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
}
i2c->irq = res;
-
+
dev_dbg(&pdev->dev, "irq resource %p (%lu)\n", res,
(unsigned long)res->start);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-23 21:11:55 +0000