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Diffstat (limited to 'drivers/i2c/busses/i2c-nomadik.c')
-rw-r--r--drivers/i2c/busses/i2c-nomadik.c96
1 files changed, 50 insertions, 46 deletions
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index 0c731ca..5267ab9 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -63,11 +63,11 @@
/* Master controller (MCR) register */
#define I2C_MCR_OP (0x1 << 0) /* Operation */
#define I2C_MCR_A7 (0x7f << 1) /* 7-bit address */
-#define I2C_MCR_EA10 (0x7 << 8) /* 10-bit Extended address */
+#define I2C_MCR_EA10 (0x7 << 8) /* 10-bit Extended address */
#define I2C_MCR_SB (0x1 << 11) /* Extended address */
#define I2C_MCR_AM (0x3 << 12) /* Address type */
-#define I2C_MCR_STOP (0x1 << 14) /* Stop condition */
-#define I2C_MCR_LENGTH (0x7ff << 15) /* Transaction length */
+#define I2C_MCR_STOP (0x1 << 14) /* Stop condition */
+#define I2C_MCR_LENGTH (0x7ff << 15) /* Transaction length */
/* Status register (SR) */
#define I2C_SR_OP (0x3 << 0) /* Operation */
@@ -77,7 +77,7 @@
#define I2C_SR_LENGTH (0x7ff << 9) /* Transfer length */
/* Interrupt mask set/clear (IMSCR) bits */
-#define I2C_IT_TXFE (0x1 << 0)
+#define I2C_IT_TXFE (0x1 << 0)
#define I2C_IT_TXFNE (0x1 << 1)
#define I2C_IT_TXFF (0x1 << 2)
#define I2C_IT_TXFOVR (0x1 << 3)
@@ -135,30 +135,31 @@ struct i2c_nmk_client {
};
/**
- * struct nmk_i2c_dev - private data structure of the controller
- * @pdev: parent platform device
- * @adap: corresponding I2C adapter
- * @irq: interrupt line for the controller
- * @virtbase: virtual io memory area
- * @clk: hardware i2c block clock
- * @cfg: machine provided controller configuration
- * @cli: holder of client specific data
- * @stop: stop condition
- * @xfer_complete: acknowledge completion for a I2C message
- * @result: controller propogated result
- * @busy: Busy doing transfer
+ * struct nmk_i2c_dev - private data structure of the controller.
+ * @pdev: parent platform device.
+ * @adap: corresponding I2C adapter.
+ * @irq: interrupt line for the controller.
+ * @virtbase: virtual io memory area.
+ * @clk: hardware i2c block clock.
+ * @cfg: machine provided controller configuration.
+ * @cli: holder of client specific data.
+ * @stop: stop condition.
+ * @xfer_complete: acknowledge completion for a I2C message.
+ * @result: controller propogated result.
+ * @regulator: pointer to i2c regulator.
+ * @busy: Busy doing transfer.
*/
struct nmk_i2c_dev {
struct platform_device *pdev;
- struct i2c_adapter adap;
- int irq;
+ struct i2c_adapter adap;
+ int irq;
void __iomem *virtbase;
struct clk *clk;
struct nmk_i2c_controller cfg;
struct i2c_nmk_client cli;
- int stop;
+ int stop;
struct completion xfer_complete;
- int result;
+ int result;
struct regulator *regulator;
bool busy;
};
@@ -216,8 +217,9 @@ static int flush_i2c_fifo(struct nmk_i2c_dev *dev)
}
}
- dev_err(&dev->pdev->dev, "flushing operation timed out "
- "giving up after %d attempts", LOOP_ATTEMPTS);
+ dev_err(&dev->pdev->dev,
+ "flushing operation timed out giving up after %d attempts",
+ LOOP_ATTEMPTS);
return -ETIMEDOUT;
}
@@ -269,7 +271,7 @@ exit:
}
/* enable peripheral, master mode operation */
-#define DEFAULT_I2C_REG_CR ((1 << 1) | I2C_CR_PE)
+#define DEFAULT_I2C_REG_CR ((1 << 1) | I2C_CR_PE)
/**
* load_i2c_mcr_reg() - load the MCR register
@@ -362,8 +364,8 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
* and high speed (up to 3.4 Mb/s)
*/
if (dev->cfg.sm > I2C_FREQ_MODE_FAST) {
- dev_err(&dev->pdev->dev, "do not support this mode "
- "defaulting to std. mode\n");
+ dev_err(&dev->pdev->dev,
+ "do not support this mode defaulting to std. mode\n");
brcr2 = i2c_clk/(100000 * 2) & 0xffff;
writel((brcr1 | brcr2), dev->virtbase + I2C_BRCR);
writel(I2C_FREQ_MODE_STANDARD << 4,
@@ -417,12 +419,12 @@ static int read_i2c(struct nmk_i2c_dev *dev)
writel(readl(dev->virtbase + I2C_IMSCR) | irq_mask,
dev->virtbase + I2C_IMSCR);
- timeout = wait_for_completion_interruptible_timeout(
+ timeout = wait_for_completion_timeout(
&dev->xfer_complete, dev->adap.timeout);
if (timeout < 0) {
dev_err(&dev->pdev->dev,
- "wait_for_completion_interruptible_timeout"
+ "wait_for_completion_timeout "
"returned %d waiting for event\n", timeout);
status = timeout;
}
@@ -504,12 +506,12 @@ static int write_i2c(struct nmk_i2c_dev *dev)
writel(readl(dev->virtbase + I2C_IMSCR) | irq_mask,
dev->virtbase + I2C_IMSCR);
- timeout = wait_for_completion_interruptible_timeout(
+ timeout = wait_for_completion_timeout(
&dev->xfer_complete, dev->adap.timeout);
if (timeout < 0) {
dev_err(&dev->pdev->dev,
- "wait_for_completion_interruptible_timeout"
+ "wait_for_completion_timeout "
"returned %d waiting for event\n", timeout);
status = timeout;
}
@@ -555,8 +557,8 @@ static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags)
if (((i2c_sr >> 2) & 0x3) == 0x3) {
/* get the abort cause */
cause = (i2c_sr >> 4) & 0x7;
- dev_err(&dev->pdev->dev, "%s\n", cause
- >= ARRAY_SIZE(abort_causes) ?
+ dev_err(&dev->pdev->dev, "%s\n",
+ cause >= ARRAY_SIZE(abort_causes) ?
"unknown reason" :
abort_causes[cause]);
}
@@ -581,13 +583,13 @@ static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags)
*
* NOTE:
* READ TRANSFER : We impose a restriction of the first message to be the
- * index message for any read transaction.
- * - a no index is coded as '0',
- * - 2byte big endian index is coded as '3'
- * !!! msg[0].buf holds the actual index.
- * This is compatible with generic messages of smbus emulator
- * that send a one byte index.
- * eg. a I2C transation to read 2 bytes from index 0
+ * index message for any read transaction.
+ * - a no index is coded as '0',
+ * - 2byte big endian index is coded as '3'
+ * !!! msg[0].buf holds the actual index.
+ * This is compatible with generic messages of smbus emulator
+ * that send a one byte index.
+ * eg. a I2C transation to read 2 bytes from index 0
* idx = 0;
* msg[0].addr = client->addr;
* msg[0].flags = 0x0;
@@ -643,8 +645,8 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
for (i = 0; i < num_msgs; i++) {
if (unlikely(msgs[i].flags & I2C_M_TEN)) {
- dev_err(&dev->pdev->dev, "10 bit addressing"
- "not supported\n");
+ dev_err(&dev->pdev->dev,
+ "10 bit addressing not supported\n");
status = -EINVAL;
goto out;
@@ -788,8 +790,9 @@ static irqreturn_t i2c_irq_handler(int irq, void *arg)
if (dev->cli.count) {
dev->result = -EIO;
- dev_err(&dev->pdev->dev, "%lu bytes still remain to be"
- "xfered\n", dev->cli.count);
+ dev_err(&dev->pdev->dev,
+ "%lu bytes still remain to be xfered\n",
+ dev->cli.count);
(void) init_hw(dev);
}
complete(&dev->xfer_complete);
@@ -922,7 +925,7 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
}
if (request_mem_region(res->start, resource_size(res),
- DRIVER_NAME "I/O region") == NULL) {
+ DRIVER_NAME "I/O region") == NULL) {
ret = -EBUSY;
goto err_no_region;
}
@@ -934,7 +937,7 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
}
dev->irq = platform_get_irq(pdev, 0);
- ret = request_irq(dev->irq, i2c_irq_handler, IRQF_DISABLED,
+ ret = request_irq(dev->irq, i2c_irq_handler, 0,
DRIVER_NAME, dev);
if (ret) {
dev_err(&pdev->dev, "cannot claim the irq %d\n", dev->irq);
@@ -979,8 +982,9 @@ static int __devinit nmk_i2c_probe(struct platform_device *pdev)
i2c_set_adapdata(adap, dev);
- dev_info(&pdev->dev, "initialize %s on virtual "
- "base %p\n", adap->name, dev->virtbase);
+ dev_info(&pdev->dev,
+ "initialize %s on virtual base %p\n",
+ adap->name, dev->virtbase);
ret = i2c_add_numbered_adapter(adap);
if (ret) {
generated by cgit v1.1 at 2024-04-25 02:18:20 +0000