From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Date: Wed, 22 Mar 2017 18:21:00 +0000 (+0100)
Subject: pata_bk3710: clear status bits of BMISP on chipset initialization
X-Git-Tag: v4.12-rc1~54^2~10^2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=396ff64d44dbcbd4e6c06c005c4e931bd4b35e4d;p=karo-tx-linux.git

pata_bk3710: clear status bits of BMISP on chipset initialization

Clear IORDYINT, INTRSTAT and DMAERROR bits of BMISP register
(value '1' needs to be written to the bit to clear it).

Suggested-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
---

diff --git a/drivers/ata/pata_bk3710.c b/drivers/ata/pata_bk3710.c
index f22e4bf7a7f6..6c3bd5fae3e4 100644
--- a/drivers/ata/pata_bk3710.c
+++ b/drivers/ata/pata_bk3710.c
@@ -276,7 +276,7 @@ static void pata_bk3710_chipinit(void __iomem *base)
 	 * (ATA_BMISP_INTRSTAT	, CLEAR)	|
 	 * (ATA_BMISP_DMAERROR	, CLEAR)
 	 */
-	iowrite16(0, base + BK3710_BMISP);
+	iowrite16(0xE, base + BK3710_BMISP);
 
 	pata_bk3710_setpiomode(base, NULL, 0, 600, 0);
 	pata_bk3710_setpiomode(base, NULL, 1, 600, 0);