commit 4812d4ccf9de3aa26a213aab784d1f03e59eee01
author Simon Glass <sjg@chromium.org> Wed May 31 17:57:18 2017 -0600
committer Simon Glass <sjg@chromium.org> Fri Jun 09 13:39:33 2017 -0600
tree ce1a8c19672e8ed2accb1e88e7c3c5370cb672f3
parent e0b1f375b9fafafcbe0fb07232823645fbedc56d

tegra: spi: Wait a little after setting the clocks

For devices that need a delay between SPI transactions we seem to need an
additional delay before the first one if the CPU is running at full speed.
Add this, under control of the existing setting. At present it will only
be enabled with the Chrome OS EC.

Signed-off-by: Simon Glass <sjg@chromium.org>

drivers/spi/tegra114_spi.c

diff --git a/drivers/spi/tegra114_spi.c b/drivers/spi/tegra114_spi.c
index 802117e..9165934 100644
--- a/drivers/spi/tegra114_spi.c
+++ b/drivers/spi/tegra114_spi.c
@@ -152,6 +152,7 @@
 			       bus->name, priv->freq, rate);
 		}
 	}
+	udelay(plat->deactivate_delay_us);
 
 	/* Clear stale status here */
 	setbits_le32(&regs->fifo_status,