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authorMarcus Weseloh <mweseloh42@gmail.com>2015-11-08 14:03:23 +0300
committerMark Brown <broonie@kernel.org>2015-11-18 21:34:56 +0300
commit47284e3e0f3c427c93f8583549b6c938e8a18015 (patch)
tree887e031311e8c5f48cc785f9c1104a68cce6a496 /drivers/spi/spi-sun4i.c
parent8005c49d9aea74d382f474ce11afbbc7d7130bec (diff)
downloadlinux-47284e3e0f3c427c93f8583549b6c938e8a18015.tar.xz
spi: sun4i: allow transfers to set transmission speed
Allow transfers to set the transmission speed rather than using the device max_speed_hz value. The SPI core makes sure that the speed_hz value is always set on the transfer. Signed-off-by: Marcus Weseloh <mweseloh42@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-sun4i.c')
-rw-r--r--drivers/spi/spi-sun4i.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/spi/spi-sun4i.c b/drivers/spi/spi-sun4i.c
index fbb0a4d74e91..f60a6d634d61 100644
--- a/drivers/spi/spi-sun4i.c
+++ b/drivers/spi/spi-sun4i.c
@@ -229,8 +229,8 @@ static int sun4i_spi_transfer_one(struct spi_master *master,
/* Ensure that we have a parent clock fast enough */
mclk_rate = clk_get_rate(sspi->mclk);
- if (mclk_rate < (2 * spi->max_speed_hz)) {
- clk_set_rate(sspi->mclk, 2 * spi->max_speed_hz);
+ if (mclk_rate < (2 * tfr->speed_hz)) {
+ clk_set_rate(sspi->mclk, 2 * tfr->speed_hz);
mclk_rate = clk_get_rate(sspi->mclk);
}
@@ -248,14 +248,14 @@ static int sun4i_spi_transfer_one(struct spi_master *master,
* First try CDR2, and if we can't reach the expected
* frequency, fall back to CDR1.
*/
- div = mclk_rate / (2 * spi->max_speed_hz);
+ div = mclk_rate / (2 * tfr->speed_hz);
if (div <= (SUN4I_CLK_CTL_CDR2_MASK + 1)) {
if (div > 0)
div--;
reg = SUN4I_CLK_CTL_CDR2(div) | SUN4I_CLK_CTL_DRS;
} else {
- div = ilog2(mclk_rate) - ilog2(spi->max_speed_hz);
+ div = ilog2(mclk_rate) - ilog2(tfr->speed_hz);
reg = SUN4I_CLK_CTL_CDR1(div);
}