Subject: [PATCH 3/9] spi_mpc83xx: Add small delay after asserting chip-select line

From: Anton Vorontsov <[email-masked]>
Date: Fri, 1 May 2009 03:48:24 +0400

This is needed for some underlaying GPIO controllers that may be
a bit slow, or if chip-select signal need some time to stabilize.

For what it's worth, we already have the similar delay for
chip-select de-assertion case.

Signed-off-by: Anton Vorontsov <[email-masked]>
---
 drivers/spi/spi_mpc83xx.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/spi/spi_mpc83xx.c b/drivers/spi/spi_mpc83xx.c
index 08b49d2..d378d5e 100644
--- a/drivers/spi/spi_mpc83xx.c
+++ b/drivers/spi/spi_mpc83xx.c
@@ -383,8 +383,10 @@ static void mpc83xx_spi_work(struct work_struct *work)
 					break;
 			}
 
-			if (cs_change)
+			if (cs_change) {
 				mpc83xx_spi_chipselect(spi, BITBANG_CS_ACTIVE);
+				ndelay(nsecs);
+			}
 			cs_change = t->cs_change;
 			if (t->len)
 				status = mpc83xx_spi_bufs(spi, t);
-- 
1.6.2.2