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authorSonic Zhang <sonic.zhang@analog.com>2014-01-28 12:55:22 +0400
committerWolfram Sang <wsa@the-dreams.de>2014-03-09 11:41:18 +0400
commit5029a22a45056603497c82445db9dd203b050e82 (patch)
tree0e49bbd4a91d9a2c3508d7b928e0e0c93dc726ba /drivers/i2c/busses/i2c-bfin-twi.c
parent45126da22452ac3d4685401a1e921a39ac0ff2f6 (diff)
downloadlinux-5029a22a45056603497c82445db9dd203b050e82.tar.xz
i2c: bfin-twi: remove unnecessary Blackfin SSYNC from the driver
Put necessary SSYNC code into blackfin twi arch header. The generic TWI driver should not contain any architecture specific code. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses/i2c-bfin-twi.c')
-rw-r--r--drivers/i2c/busses/i2c-bfin-twi.c14
1 files changed, 0 insertions, 14 deletions
diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index c8976a3e03df..e6d5162b6379 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -65,7 +65,6 @@ static void bfin_twi_handle_interrupt(struct bfin_twi_iface *iface,
/* Transmit next data */
while (iface->writeNum > 0 &&
(read_FIFO_STAT(iface) & XMTSTAT) != XMT_FULL) {
- SSYNC();
write_XMT_DATA8(iface, *(iface->transPtr++));
iface->writeNum--;
}
@@ -248,7 +247,6 @@ static irqreturn_t bfin_twi_interrupt_entry(int irq, void *dev_id)
/* Clear interrupt status */
write_INT_STAT(iface, twi_int_status);
bfin_twi_handle_interrupt(iface, twi_int_status);
- SSYNC();
}
spin_unlock_irqrestore(&iface->lock, flags);
return IRQ_HANDLED;
@@ -294,9 +292,7 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap,
* discarded before start a new operation.
*/
write_FIFO_CTL(iface, 0x3);
- SSYNC();
write_FIFO_CTL(iface, 0);
- SSYNC();
if (pmsg->flags & I2C_M_RD)
iface->read_write = I2C_SMBUS_READ;
@@ -306,7 +302,6 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap,
if (iface->writeNum > 0) {
write_XMT_DATA8(iface, *(iface->transPtr++));
iface->writeNum--;
- SSYNC();
}
}
@@ -315,7 +310,6 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap,
/* Interrupt mask . Enable XMT, RCV interrupt */
write_INT_MASK(iface, MCOMP | MERR | RCVSERV | XMTSERV);
- SSYNC();
if (pmsg->len <= 255)
write_MASTER_CTL(iface, pmsg->len << 6);
@@ -329,7 +323,6 @@ static int bfin_twi_do_master_xfer(struct i2c_adapter *adap,
(iface->msg_num > 1 ? RSTART : 0) |
((iface->read_write == I2C_SMBUS_READ) ? MDIR : 0) |
((CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ > 100) ? FAST : 0));
- SSYNC();
while (!iface->result) {
if (!wait_for_completion_timeout(&iface->complete,
@@ -453,7 +446,6 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
* start a new operation.
*/
write_FIFO_CTL(iface, 0x3);
- SSYNC();
write_FIFO_CTL(iface, 0);
/* clear int stat */
@@ -461,7 +453,6 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
/* Set Transmit device address */
write_MASTER_ADDR(iface, addr);
- SSYNC();
switch (iface->cur_mode) {
case TWI_I2C_MODE_STANDARDSUB:
@@ -469,7 +460,6 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
write_INT_MASK(iface, MCOMP | MERR |
((iface->read_write == I2C_SMBUS_READ) ?
RCVSERV : XMTSERV));
- SSYNC();
if (iface->writeNum + 1 <= 255)
write_MASTER_CTL(iface, (iface->writeNum + 1) << 6);
@@ -484,7 +474,6 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
case TWI_I2C_MODE_COMBINED:
write_XMT_DATA8(iface, iface->command);
write_INT_MASK(iface, MCOMP | MERR | RCVSERV | XMTSERV);
- SSYNC();
if (iface->writeNum > 0)
write_MASTER_CTL(iface, (iface->writeNum + 1) << 6);
@@ -531,7 +520,6 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
write_INT_MASK(iface, MCOMP | MERR |
((iface->read_write == I2C_SMBUS_READ) ?
RCVSERV : XMTSERV));
- SSYNC();
/* Master enable */
write_MASTER_CTL(iface, read_MASTER_CTL(iface) | MEN |
@@ -539,7 +527,6 @@ int bfin_twi_do_smbus_xfer(struct i2c_adapter *adap, u16 addr,
((CONFIG_I2C_BLACKFIN_TWI_CLK_KHZ > 100) ? FAST : 0));
break;
}
- SSYNC();
while (!iface->result) {
if (!wait_for_completion_timeout(&iface->complete,
@@ -704,7 +691,6 @@ static int i2c_bfin_twi_probe(struct platform_device *pdev)
/* Enable TWI */
write_CONTROL(iface, read_CONTROL(iface) | TWI_ENA);
- SSYNC();
rc = i2c_add_numbered_adapter(p_adap);
if (rc < 0) {