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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 21:40:53 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 21:40:53 -0800
commit118c216e16c5ccb028cd03a0dcd56d17a07ff8d7 (patch)
tree94769cd9af230aec964d95f380b1119bb8d8edf0 /drivers/staging/sm750fb/ddk750_hwi2c.c
parentfd0d351de7bbd718bc2b34d5846854831aa2b88c (diff)
parente3cc3136df33de1aa26d606f2a42cac3fd30cf54 (diff)
Merge tag 'staging-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver updates from Greg KH: "Here's the big staging driver update for 4.4-rc1. If you were disappointed for 4.3-rc1 that we didn't contribute enough changesets, you should be happy with this pull request of over 2400 patches. But overall we removed more lines of code than we added, which is nice to see. Full details in the shortlog. All of these have been in linux-next for a while" Greg, I've never been disappointed in how few commits Staging contributes to the kernel.. Never. * tag 'staging-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (2431 commits) Staging: rtl8192u: ieee80211: added missing blank lines Staging: rtl8192u: ieee80211: removed unnecessary braces Staging: rtl8192u: ieee80211: corrected block comments Staging: rtl8192u: ieee80211: corrected indent Staging: rtl8192u: ieee80211: added missing spaces after if Staging: rtl8192u: ieee80211: added missing space around '=' Staging: rtl8192u: ieee80211: fixed position of else statements Staging: rtl8192u: ieee80211: fixed open brace positions staging: rdma: ipath: Remove unneeded vairable. staging: rtl8188eu: pwrGrpCnt variable removed in store_pwrindex_offset function staging: rtl8188eu: new variable for hal_data->MCSTxPowerLevelOriginalOffset[pwrGrpCnt] in store_pwrindex_offset function staging: rtl8188eu: checkpatch fixes: 'Avoid CamelCase' in hal/bb_cfg.c staging: rtl8188eu: checkpatch fixes: line over 80 characters splited into two parts staging: rtl8188eu: checkpatch fixes: alignment should match open parenthesis staging: rtl8188eu: checkpatch fixes: unnecessary parentheses removed in hal/bb_cfg.c staging: rtl8188eu: checkpatch fixes: spaces preferred around that '|' in hal/bb_cfg.c staging: rtl8188eu: operator = replaced by += in loop increment staging: rtl8188eu: occurrence of the 5 GHz code marked staging: rtl8188eu: increment placed into for loop header staging: rtl8188eu: while loop replaced by for loop in rtw_restruct_wmm_ie ...
Diffstat (limited to 'drivers/staging/sm750fb/ddk750_hwi2c.c')
-rw-r--r--drivers/staging/sm750fb/ddk750_hwi2c.c109
1 files changed, 51 insertions, 58 deletions
diff --git a/drivers/staging/sm750fb/ddk750_hwi2c.c b/drivers/staging/sm750fb/ddk750_hwi2c.c
index 5ddac430aea2..7be2111284f4 100644
--- a/drivers/staging/sm750fb/ddk750_hwi2c.c
+++ b/drivers/staging/sm750fb/ddk750_hwi2c.c
@@ -8,9 +8,8 @@
#define MAX_HWI2C_FIFO 16
#define HWI2C_WAIT_TIMEOUT 0xF0000
-
-int hwI2CInit(
-unsigned char busSpeedMode
+int sm750_hw_i2c_init(
+unsigned char bus_speed_mode
)
{
unsigned int value;
@@ -29,7 +28,7 @@ unsigned char busSpeedMode
/* Enable the I2C Controller and set the bus speed mode */
value = PEEK32(I2C_CTRL);
- if (busSpeedMode == 0)
+ if (bus_speed_mode == 0)
value = FIELD_SET(value, I2C_CTRL, MODE, STANDARD);
else
value = FIELD_SET(value, I2C_CTRL, MODE, FAST);
@@ -39,8 +38,7 @@ unsigned char busSpeedMode
return 0;
}
-
-void hwI2CClose(void)
+void sm750_hw_i2c_close(void)
{
unsigned int value;
@@ -59,14 +57,14 @@ void hwI2CClose(void)
POKE32(GPIO_MUX, value);
}
-
-static long hwI2CWaitTXDone(void)
+static long hw_i2c_wait_tx_done(void)
{
unsigned int timeout;
/* Wait until the transfer is completed. */
timeout = HWI2C_WAIT_TIMEOUT;
- while ((FIELD_GET(PEEK32(I2C_STATUS), I2C_STATUS, TX) != I2C_STATUS_TX_COMPLETED) &&
+ while ((FIELD_GET(PEEK32(I2C_STATUS),
+ I2C_STATUS, TX) != I2C_STATUS_TX_COMPLETED) &&
(timeout != 0))
timeout--;
@@ -76,38 +74,39 @@ static long hwI2CWaitTXDone(void)
return 0;
}
-
-
/*
* This function writes data to the i2c slave device registers.
*
* Parameters:
- * deviceAddress - i2c Slave device address
+ * addr - i2c Slave device address
* length - Total number of bytes to be written to the device
- * pBuffer - The buffer that contains the data to be written to the
+ * buf - The buffer that contains the data to be written to the
* i2c device.
*
* Return Value:
* Total number of bytes those are actually written.
*/
-static unsigned int hwI2CWriteData(
- unsigned char deviceAddress,
+static unsigned int hw_i2c_write_data(
+ unsigned char addr,
unsigned int length,
- unsigned char *pBuffer
+ unsigned char *buf
)
{
unsigned char count, i;
- unsigned int totalBytes = 0;
+ unsigned int total_bytes = 0;
/* Set the Device Address */
- POKE32(I2C_SLAVE_ADDRESS, deviceAddress & ~0x01);
+ POKE32(I2C_SLAVE_ADDRESS, addr & ~0x01);
/* Write data.
* Note:
* Only 16 byte can be accessed per i2c start instruction.
*/
do {
- /* Reset I2C by writing 0 to I2C_RESET register to clear the previous status. */
+ /*
+ * Reset I2C by writing 0 to I2C_RESET register to
+ * clear the previous status.
+ */
POKE32(I2C_RESET, 0);
/* Set the number of bytes to be written */
@@ -119,61 +118,62 @@ static unsigned int hwI2CWriteData(
/* Move the data to the I2C data register */
for (i = 0; i <= count; i++)
- POKE32(I2C_DATA0 + i, *pBuffer++);
+ POKE32(I2C_DATA0 + i, *buf++);
/* Start the I2C */
- POKE32(I2C_CTRL, FIELD_SET(PEEK32(I2C_CTRL), I2C_CTRL, CTRL, START));
+ POKE32(I2C_CTRL,
+ FIELD_SET(PEEK32(I2C_CTRL), I2C_CTRL, CTRL, START));
/* Wait until the transfer is completed. */
- if (hwI2CWaitTXDone() != 0)
+ if (hw_i2c_wait_tx_done() != 0)
break;
/* Substract length */
length -= (count + 1);
/* Total byte written */
- totalBytes += (count + 1);
+ total_bytes += (count + 1);
} while (length > 0);
- return totalBytes;
+ return total_bytes;
}
-
-
-
/*
* This function reads data from the slave device and stores them
* in the given buffer
*
* Parameters:
- * deviceAddress - i2c Slave device address
+ * addr - i2c Slave device address
* length - Total number of bytes to be read
- * pBuffer - Pointer to a buffer to be filled with the data read
+ * buf - Pointer to a buffer to be filled with the data read
* from the slave device. It has to be the same size as the
* length to make sure that it can keep all the data read.
*
* Return Value:
* Total number of actual bytes read from the slave device
*/
-static unsigned int hwI2CReadData(
- unsigned char deviceAddress,
+static unsigned int hw_i2c_read_data(
+ unsigned char addr,
unsigned int length,
- unsigned char *pBuffer
+ unsigned char *buf
)
{
unsigned char count, i;
- unsigned int totalBytes = 0;
+ unsigned int total_bytes = 0;
/* Set the Device Address */
- POKE32(I2C_SLAVE_ADDRESS, deviceAddress | 0x01);
+ POKE32(I2C_SLAVE_ADDRESS, addr | 0x01);
/* Read data and save them to the buffer.
* Note:
* Only 16 byte can be accessed per i2c start instruction.
*/
do {
- /* Reset I2C by writing 0 to I2C_RESET register to clear all the status. */
+ /*
+ * Reset I2C by writing 0 to I2C_RESET register to
+ * clear all the status.
+ */
POKE32(I2C_RESET, 0);
/* Set the number of bytes to be read */
@@ -184,30 +184,28 @@ static unsigned int hwI2CReadData(
POKE32(I2C_BYTE_COUNT, count);
/* Start the I2C */
- POKE32(I2C_CTRL, FIELD_SET(PEEK32(I2C_CTRL), I2C_CTRL, CTRL, START));
+ POKE32(I2C_CTRL,
+ FIELD_SET(PEEK32(I2C_CTRL), I2C_CTRL, CTRL, START));
/* Wait until transaction done. */
- if (hwI2CWaitTXDone() != 0)
+ if (hw_i2c_wait_tx_done() != 0)
break;
/* Save the data to the given buffer */
for (i = 0; i <= count; i++)
- *pBuffer++ = PEEK32(I2C_DATA0 + i);
+ *buf++ = PEEK32(I2C_DATA0 + i);
/* Substract length by 16 */
length -= (count + 1);
/* Number of bytes read. */
- totalBytes += (count + 1);
+ total_bytes += (count + 1);
} while (length > 0);
- return totalBytes;
+ return total_bytes;
}
-
-
-
/*
* This function reads the slave device's register
*
@@ -219,23 +217,19 @@ static unsigned int hwI2CReadData(
* Return Value:
* Register value
*/
-unsigned char hwI2CReadReg(
- unsigned char deviceAddress,
- unsigned char registerIndex
+unsigned char sm750_hw_i2c_read_reg(
+ unsigned char addr,
+ unsigned char reg
)
{
unsigned char value = (0xFF);
- if (hwI2CWriteData(deviceAddress, 1, &registerIndex) == 1)
- hwI2CReadData(deviceAddress, 1, &value);
+ if (hw_i2c_write_data(addr, 1, &reg) == 1)
+ hw_i2c_read_data(addr, 1, &value);
return value;
}
-
-
-
-
/*
* This function writes a value to the slave device's register
*
@@ -249,21 +243,20 @@ unsigned char hwI2CReadReg(
* 0 - Success
* -1 - Fail
*/
-int hwI2CWriteReg(
- unsigned char deviceAddress,
- unsigned char registerIndex,
+int sm750_hw_i2c_write_reg(
+ unsigned char addr,
+ unsigned char reg,
unsigned char data
)
{
unsigned char value[2];
- value[0] = registerIndex;
+ value[0] = reg;
value[1] = data;
- if (hwI2CWriteData(deviceAddress, 2, value) == 2)
+ if (hw_i2c_write_data(addr, 2, value) == 2)
return 0;
return (-1);
}
-
#endif