Reduce code size in the message transfer function by factoring out
a single-message transfer function.
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
drivers/i2c/busses/i2c-nomadik.c | 80 +++++++++++++++++++++++---------------
1 files changed, 48 insertions(+), 32 deletions(-)
diff --git a/drivers/i2c/busses/i2c-nomadik.c b/drivers/i2c/busses/i2c-nomadik.c
index fa7b106..0c731ca 100644
--- a/drivers/i2c/busses/i2c-nomadik.c
+++ b/drivers/i2c/busses/i2c-nomadik.c
@@ -525,6 +525,51 @@ static int write_i2c(struct nmk_i2c_dev *dev)
}
/**
+ * nmk_i2c_xfer_one() - transmit a single I2C message
+ * @dev: device with a message encoded into it
+ * @flags: message flags
+ */
+static int nmk_i2c_xfer_one(struct nmk_i2c_dev *dev, u16 flags)
+{
+ int status;
+
+ if (flags & I2C_M_RD) {
+ /* read operation */
+ dev->cli.operation = I2C_READ;
+ status = read_i2c(dev);
+ } else {
+ /* write operation */
+ dev->cli.operation = I2C_WRITE;
+ status = write_i2c(dev);
+ }
+
+ if (status || (dev->result)) {
+ u32 i2c_sr;
+ u32 cause;
+
+ i2c_sr = readl(dev->virtbase + I2C_SR);
+ /*
+ * Check if the controller I2C operation status
+ * is set to ABORT(11b).
+ */
+ 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) ?
+ "unknown reason" :
+ abort_causes[cause]);
+ }
+
+ (void) init_hw(dev);
+
+ status = status ? status : dev->result;
+ }
+
+ return status;
+}
+
+/**
* nmk_i2c_xfer() - I2C transfer function used by kernel framework
* @i2c_adap: Adapter pointer to the controller
* @msgs: Pointer to data to be written.
@@ -576,9 +621,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
{
int status;
int i;
- u32 cause;
struct nmk_i2c_dev *dev = i2c_get_adapdata(i2c_adap);
- u32 i2c_sr;
int j;
dev->busy = true;
@@ -593,6 +636,7 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
if (status)
goto out;
+ /* Attempt three times to send the message queue */
for (j = 0; j < 3; j++) {
/* setup the i2c controller */
setup_i2c_controller(dev);
@@ -611,37 +655,9 @@ static int nmk_i2c_xfer(struct i2c_adapter *i2c_adap,
dev->stop = (i < (num_msgs - 1)) ? 0 : 1;
dev->result = 0;
- if (msgs[i].flags & I2C_M_RD) {
- /* it is a read operation */
- dev->cli.operation = I2C_READ;
- status = read_i2c(dev);
- } else {
- /* write operation */
- dev->cli.operation = I2C_WRITE;
- status = write_i2c(dev);
- }
- if (status || (dev->result)) {
- i2c_sr = readl(dev->virtbase + I2C_SR);
- /*
- * Check if the controller I2C operation status
- * is set to ABORT(11b).
- */
- 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) ?
- "unknown reason" :
- abort_causes[cause]);
- }
-
- (void) init_hw(dev);
-
- status = status ? status : dev->result;
-
+ status = nmk_i2c_xfer_one(dev, msgs[i].flags);
+ if (status != 0)
break;
- }
}
if (status == 0)
break;
--
1.7.5.1
--
To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
