linux-kernel - [PATCH v3 3/5] pata_bk3710: clear status bits of BMISP on chipset initialization

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Message-id: <1490206862-26065-4-git-send-email-b.zolnierkie@samsung.com>
Date:   Wed, 22 Mar 2017 19:21:00 +0100
From:   Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To:     Tejun Heo <tj@...nel.org>
Cc:     Sekhar Nori <nsekhar@...com>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
        Kevin Hilman <khilman@...libre.com>,
        Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@....linux.org.uk>,
        Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
        linux-ide@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, b.zolnierkie@...sung.com
Subject: [PATCH v3 3/5] 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@...entembedded.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
---
 drivers/ata/pata_bk3710.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/ata/pata_bk3710.c b/drivers/ata/pata_bk3710.c
index f22e4bf..6c3bd5f 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);
-- 
1.9.1