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authorAxel Lin <axel.lin@ingics.com>2014-02-09 04:15:07 (GMT)
committerMark Brown <broonie@linaro.org>2014-02-10 14:14:48 (GMT)
commit425f96d2f635d7a1a101c916830ba7843a6d5a50 (patch)
treef97d4df20de40b01e5377fcd3507488ed2678d8c /drivers/spi/spi-txx9.c
parent38dbfb59d1175ef458d006556061adeaa8751b72 (diff)
spi: txx9: Convert to let spi core handle checking transfer speed
By setting master->max_speed_hz and master->min_speed_hz, spi core will handle checking transfer speed. Then we can remove the same checking in this driver. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-txx9.c')
-rw-r--r--drivers/spi/spi-txx9.c12
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/spi/spi-txx9.c b/drivers/spi/spi-txx9.c
index 6191ced..523f13d 100644
--- a/drivers/spi/spi-txx9.c
+++ b/drivers/spi/spi-txx9.c
@@ -80,7 +80,6 @@ struct txx9spi {
void __iomem *membase;
int baseclk;
struct clk *clk;
- u32 max_speed_hz, min_speed_hz;
int last_chipselect;
int last_chipselect_val;
};
@@ -117,9 +116,7 @@ static int txx9spi_setup(struct spi_device *spi)
{
struct txx9spi *c = spi_master_get_devdata(spi->master);
- if (!spi->max_speed_hz
- || spi->max_speed_hz > c->max_speed_hz
- || spi->max_speed_hz < c->min_speed_hz)
+ if (!spi->max_speed_hz)
return -EINVAL;
if (gpio_direction_output(spi->chip_select,
@@ -309,15 +306,12 @@ static int txx9spi_transfer(struct spi_device *spi, struct spi_message *m)
/* check each transfer's parameters */
list_for_each_entry(t, &m->transfers, transfer_list) {
- u32 speed_hz = t->speed_hz ? : spi->max_speed_hz;
u8 bits_per_word = t->bits_per_word;
if (!t->tx_buf && !t->rx_buf && t->len)
return -EINVAL;
if (t->len & ((bits_per_word >> 3) - 1))
return -EINVAL;
- if (speed_hz < c->min_speed_hz || speed_hz > c->max_speed_hz)
- return -EINVAL;
}
spin_lock_irqsave(&c->lock, flags);
@@ -360,8 +354,8 @@ static int txx9spi_probe(struct platform_device *dev)
goto exit;
}
c->baseclk = clk_get_rate(c->clk);
- c->min_speed_hz = DIV_ROUND_UP(c->baseclk, SPI_MAX_DIVIDER + 1);
- c->max_speed_hz = c->baseclk / (SPI_MIN_DIVIDER + 1);
+ master->min_speed_hz = DIV_ROUND_UP(c->baseclk, SPI_MAX_DIVIDER + 1);
+ master->max_speed_hz = c->baseclk / (SPI_MIN_DIVIDER + 1);
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!res)

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