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| author | Simon Glass <sjg@chromium.org> | 2015-02-17 15:29:35 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-05-05 20:58:18 -0600 |
| commit | 60e2809a848bccd3a8090d3f2237964670f2780c (patch) | |
| tree | 0e48144601cecacb6f58b2e32cf516c7281204f5 /drivers | |
| parent | 172a31bf87bf299130a68320f08aa492c34ea3e0 (diff) | |
| download | u-boot-imx-60e2809a848bccd3a8090d3f2237964670f2780c.zip u-boot-imx-60e2809a848bccd3a8090d3f2237964670f2780c.tar.gz u-boot-imx-60e2809a848bccd3a8090d3f2237964670f2780c.tar.bz2 | |
dm: spi: Avoid setting the speed with every transfer
Only set the speed if it has changed from last time. Since the speed will
be 0 when the device is probed it will always be changed on the first
transfer after the device is probed.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spi-uclass.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/spi/spi-uclass.c b/drivers/spi/spi-uclass.c index 83fe8e0..737ae64 100644 --- a/drivers/spi/spi-uclass.c +++ b/drivers/spi/spi-uclass.c @@ -63,9 +63,12 @@ int spi_claim_bus(struct spi_slave *slave) } if (!speed) speed = 100000; - ret = spi_set_speed_mode(bus, speed, slave->mode); - if (ret) - return ret; + if (speed != slave->speed) { + ret = spi_set_speed_mode(bus, speed, slave->mode); + if (ret) + return ret; + slave->speed = speed; + } return ops->claim_bus ? ops->claim_bus(dev) : 0; } |