From 6643f62734c27f53fc3dee36dcaa24191fcabcf0 Mon Sep 17 00:00:00 2001
From: yaozhiman <yzman@163.com>
Date: Fri, 20 Nov 2015 13:24:09 +0800
Subject: [PATCH] In the device driver, when members of the  struct
 spi_transfer cs_change = 1, CS pin no longer valid, in the next xfer
 transmission CS pin never be selected(low)

---
 drivers/spi/spi-atmel.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 04e48e515a7c0b..2863e642b4b75f 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -1303,7 +1303,12 @@ static int atmel_spi_one_transfer(struct spi_master *master,
 		if (atmel_spi_dma_map_xfer(as, xfer) < 0)
 			return -ENOMEM;
 	}
-
+	
+	if (!as->cs_active){
+		cs_activate(as, msg->spi);
+		as->cs_active = true;
+	}
+	
 	atmel_spi_set_xfer_speed(as, msg->spi, xfer);
 
 	as->done_status = 0;