From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934917AbdCVOL5 (ORCPT ); Wed, 22 Mar 2017 10:11:57 -0400 Received: from conuserg-07.nifty.com ([210.131.2.74]:47756 "EHLO conuserg-07.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934563AbdCVOLk (ORCPT ); Wed, 22 Mar 2017 10:11:40 -0400 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-07.nifty.com v2ME8LDg010154 X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: linux-mtd@lists.infradead.org Cc: laurent.monat@idquantique.com, thorsten.christiansson@idquantique.com, Enrico Jorns , Jason Roberts , Artem Bityutskiy , Dinh Nguyen , Boris Brezillon , Marek Vasut , Brian Norris , Graham Moore , David Woodhouse , Masami Hiramatsu , Chuanxiao Dong , Jassi Brar , Masahiro Yamada , linux-kernel@vger.kernel.org, Richard Weinberger , Cyrille Pitchen Subject: [PATCH v2 23/53] mtd: nand: denali: set DEVICES_CONNECTED 1 if not set Date: Wed, 22 Mar 2017 23:07:30 +0900 Message-Id: <1490191680-14481-24-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1490191680-14481-1-git-send-email-yamada.masahiro@socionext.com> References: <1490191680-14481-1-git-send-email-yamada.masahiro@socionext.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, the driver expects DEVICE_CONNECTED is automatically set by the hardware, but this feature is disabled in some cases. In such cases, it is the software's responsibility to set up the DEVICES_CONNECTED register. Signed-off-by: Masahiro Yamada --- Changes in v2: None drivers/mtd/nand/denali.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index abf8997..3da0a0e 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1472,6 +1472,15 @@ static int denali_multidev_fixup(struct denali_nand_info *denali) */ denali->devnum = ioread32(denali->flash_reg + DEVICES_CONNECTED); + /* + * On some SoCs, DEVICES_CONNECTED is not auto-detected. + * For those, DEVICES_CONNECTED is left to 0. Set 1 if it is the case. + */ + if (denali->devnum == 0) { + denali->devnum = 1; + iowrite32(1, denali->flash_reg + DEVICES_CONNECTED); + } + if (denali->devnum == 1) return 0; -- 2.7.4