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authorMike Frysinger <vapier@gentoo.org>2009-09-23 23:24:59 +0000
committerMike Frysinger <vapier@gentoo.org>2010-10-18 02:49:31 -0400
commit5cc0159a5779f297d1b987d5f6d0feb6dc36a27a (patch)
tree1995cdcf754d098dcf66d72868e376836e52b54a /drivers/spi
parent201bbc6fd84c67b4021f454d3e4c30d5cd77f702 (diff)
spi/bfin_spi: punt useless null read/write funcs
The chip ops should always be initialized, so having null fallback functions are useless. Reported-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi_bfin5xx.c47
1 files changed, 5 insertions, 42 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c
index f4023a78c87e..5e07f498b495 100644
--- a/drivers/spi/spi_bfin5xx.c
+++ b/drivers/spi/spi_bfin5xx.c
@@ -255,43 +255,6 @@ static inline void bfin_spi_dummy_read(struct driver_data *drv_data)
(void) read_RDBR(drv_data);
}
-static void bfin_spi_null_writer(struct driver_data *drv_data)
-{
- u8 n_bytes = drv_data->n_bytes;
- u16 tx_val = drv_data->cur_chip->idle_tx_val;
-
- /* clear RXS (we check for RXS inside the loop) */
- bfin_spi_dummy_read(drv_data);
-
- while (drv_data->tx < drv_data->tx_end) {
- write_TDBR(drv_data, tx_val);
- drv_data->tx += n_bytes;
- /* wait until transfer finished.
- checking SPIF or TXS may not guarantee transfer completion */
- while (!(read_STAT(drv_data) & BIT_STAT_RXS))
- cpu_relax();
- /* discard RX data and clear RXS */
- bfin_spi_dummy_read(drv_data);
- }
-}
-
-static void bfin_spi_null_reader(struct driver_data *drv_data)
-{
- u8 n_bytes = drv_data->n_bytes;
- u16 tx_val = drv_data->cur_chip->idle_tx_val;
-
- /* discard old RX data and clear RXS */
- bfin_spi_dummy_read(drv_data);
-
- while (drv_data->rx < drv_data->rx_end) {
- write_TDBR(drv_data, tx_val);
- drv_data->rx += n_bytes;
- while (!(read_STAT(drv_data) & BIT_STAT_RXS))
- cpu_relax();
- bfin_spi_dummy_read(drv_data);
- }
-}
-
static void bfin_spi_u8_writer(struct driver_data *drv_data)
{
/* clear RXS (we check for RXS inside the loop) */
@@ -680,9 +643,9 @@ static void bfin_spi_pump_transfers(unsigned long data)
transfer->bits_per_word = chip->bits_per_word;
drv_data->n_bytes = chip->n_bytes;
width = chip->width;
- drv_data->write = drv_data->tx ? chip->write : bfin_spi_null_writer;
- drv_data->read = drv_data->rx ? chip->read : bfin_spi_null_reader;
- drv_data->duplex = chip->duplex ? chip->duplex : bfin_spi_null_writer;
+ drv_data->write = chip->write;
+ drv_data->read = chip->read;
+ drv_data->duplex = chip->duplex;
break;
}
cr = (read_CTRL(drv_data) & (~BIT_CTL_TIMOD));
@@ -695,8 +658,8 @@ static void bfin_spi_pump_transfers(unsigned long data)
drv_data->len = transfer->len;
}
dev_dbg(&drv_data->pdev->dev,
- "transfer: drv_data->write is %p, chip->write is %p, null_wr is %p\n",
- drv_data->write, chip->write, bfin_spi_null_writer);
+ "transfer: drv_data->write is %p, chip->write is %p\n",
+ drv_data->write, chip->write);
/* speed and width has been set on per message */
message->state = RUNNING_STATE;