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spi: rspi: Remove casts

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Remove useless casts, and do not cast away const.

Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Geert Uytterhoeven
2013-12-24 10:49:31 +01:00
committed by Mark Brown
parent fc671a900b
commit c132f0949a
1 changed files with 14 additions and 15 deletions
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29
drivers/spi/spi-rspi.c
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@@ -330,9 +330,7 @@ static int rspi_send_pio(struct rspi_data *rspi, struct spi_message *mesg,
struct spi_transfer *t)
{
int remain = t->len;
u8 *data;
data = (u8 *)t->tx_buf;
const u8 *data = t->tx_buf;
while (remain > 0) {
rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) | SPCR_TXMD,
RSPI_SPCR);
@@ -358,12 +356,11 @@ static int qspi_send_pio(struct rspi_data *rspi, struct spi_message *mesg,
struct spi_transfer *t)
{
int remain = t->len;
u8 *data;
const u8 *data = t->tx_buf;
rspi_write8(rspi, SPBFCR_TXRST, QSPI_SPBFCR);
rspi_write8(rspi, 0x00, QSPI_SPBFCR);
data = (u8 *)t->tx_buf;
while (remain > 0) {
if (rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE) < 0) {
@@ -399,8 +396,8 @@ static void rspi_dma_complete(void *arg)
wake_up_interruptible(&rspi->wait);
}
static int rspi_dma_map_sg(struct scatterlist *sg, void *buf, unsigned len,
struct dma_chan *chan,
static int rspi_dma_map_sg(struct scatterlist *sg, const void *buf,
unsigned len, struct dma_chan *chan,
enum dma_transfer_direction dir)
{
sg_init_table(sg, 1);
@@ -440,12 +437,13 @@ static void rspi_memory_from_8bit(void *buf, const void *data, unsigned len)
static int rspi_send_dma(struct rspi_data *rspi, struct spi_transfer *t)
{
struct scatterlist sg;
void *buf = NULL;
const void *buf = NULL;
struct dma_async_tx_descriptor *desc;
unsigned len;
int ret = 0;
if (rspi->dma_width_16bit) {
void *tmp;
/*
* If DMAC bus width is 16-bit, the driver allocates a dummy
* buffer. And, the driver converts original data into the
@@ -454,13 +452,14 @@ static int rspi_send_dma(struct rspi_data *rspi, struct spi_transfer *t)
* DMAC data: 1st byte, dummy, 2nd byte, dummy ...
*/
len = t->len * 2;
buf = kmalloc(len, GFP_KERNEL);
if (!buf)
tmp = kmalloc(len, GFP_KERNEL);
if (!tmp)
return -ENOMEM;
rspi_memory_to_8bit(buf, t->tx_buf, t->len);
rspi_memory_to_8bit(tmp, t->tx_buf, t->len);
buf = tmp;
} else {
len = t->len;
buf = (void *)t->tx_buf;
buf = t->tx_buf;
}
if (!rspi_dma_map_sg(&sg, buf, len, rspi->chan_tx, DMA_TO_DEVICE)) {
@@ -528,7 +527,7 @@ static int rspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg,
rspi_receive_init(rspi);
data = (u8 *)t->rx_buf;
data = t->rx_buf;
while (remain > 0) {
rspi_write8(rspi, rspi_read8(rspi, RSPI_SPCR) & ~SPCR_TXMD,
RSPI_SPCR);
@@ -575,7 +574,7 @@ static int qspi_receive_pio(struct rspi_data *rspi, struct spi_message *mesg,
qspi_receive_init(rspi);
data = (u8 *)t->rx_buf;
data = t->rx_buf;
while (remain > 0) {
if (rspi_wait_for_interrupt(rspi, SPSR_SPTEF, SPCR_SPTIE) < 0) {
@@ -802,7 +801,7 @@ static void rspi_cleanup(struct spi_device *spi)
static irqreturn_t rspi_irq(int irq, void *_sr)
{
struct rspi_data *rspi = (struct rspi_data *)_sr;
struct rspi_data *rspi = _sr;
unsigned long spsr;
irqreturn_t ret = IRQ_NONE;
unsigned char disable_irq = 0;