From 5cc0159a5779f297d1b987d5f6d0feb6dc36a27a Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 23 Sep 2009 23:24:59 +0000 Subject: 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 Signed-off-by: Mike Frysinger --- drivers/spi/spi_bfin5xx.c | 47 +++++------------------------------------------ 1 file changed, 5 insertions(+), 42 deletions(-) (limited to 'drivers') 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; -- cgit v1.2.3