From mboxrd@z Thu Jan 1 00:00:00 1970 From: Axel Lin Subject: [PATCH RFT] spi: txx9: Convert to let spi core handle checking transfer speed Date: Sun, 09 Feb 2014 12:15:07 +0800 Message-ID: <1391919307.26425.2.camel@phoenix> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Atsushi Nemoto , linux-spi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Mark Brown Return-path: Sender: linux-spi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: 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 --- drivers/spi/spi-txx9.c | 12 +++--------- 1 file 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) -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html