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| author | Axel Lin <axel.lin@ingics.com> | 2014-02-09 12:15:07 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-02-10 14:14:48 +0000 |
| commit | 425f96d2f635d7a1a101c916830ba7843a6d5a50 (patch) | |
| tree | f97d4df20de40b01e5377fcd3507488ed2678d8c /drivers/spi/spi-txx9.c | |
| parent | 38dbfb59d1175ef458d006556061adeaa8751b72 (diff) | |
| download | linux-stable-425f96d2f635d7a1a101c916830ba7843a6d5a50.tar.gz linux-stable-425f96d2f635d7a1a101c916830ba7843a6d5a50.tar.bz2 linux-stable-425f96d2f635d7a1a101c916830ba7843a6d5a50.zip | |
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.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/spi/spi-txx9.c b/drivers/spi/spi-txx9.c index 6191ced514b2..523f13df52bb 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) |