From patchwork Wed Mar 22 20:07:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 95830 Delivered-To: patch@linaro.org Received: by 10.140.89.233 with SMTP id v96csp413658qgd; Wed, 22 Mar 2017 13:13:15 -0700 (PDT) X-Received: by 10.98.211.143 with SMTP id z15mr49459050pfk.46.1490213595609; Wed, 22 Mar 2017 13:13:15 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id k80si2116963pfk.272.2017.03.22.13.13.15; Wed, 22 Mar 2017 13:13:15 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@nifty.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751833AbdCVUNE (ORCPT + 11 others); Wed, 22 Mar 2017 16:13:04 -0400 Received: from conuserg-07.nifty.com ([210.131.2.74]:25128 "EHLO conuserg-07.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751449AbdCVUL7 (ORCPT ); Wed, 22 Mar 2017 16:11:59 -0400 Received: from grover.sesame (FL1-111-169-71-157.osk.mesh.ad.jp [111.169.71.157]) (authenticated) by conuserg-07.nifty.com with ESMTP id v2MK896D029452; Thu, 23 Mar 2017 05:08:47 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-07.nifty.com v2MK896D029452 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1490213328; bh=lJjun7m07Up94XhckEfI9LGZQhK6861r5EIlvWfOCpk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tX8nqjDtkzjdRzDjHJmBEexHmpzZsMPfXmmR0KuJhsaMupYgIEA32ZKe8T81iLGYQ O8PeepUQc7g0qNZghpJ7B8Gl7U4t3dcbN1J577P2LgU3hJ4F6/SFM55/wGpNiAGLKN YTmwe129MzIl4xDoMaFa2YTN0sOoNBg4q5Cc4CznaEEMBtvUp5lA4CrIedImA4QB8k Y6vT/de5MymFIMwdKQ6/wOcOPj0eKtT27EnXzmApTMWAQq+VZ+lLeFIn/A7KFfH7dY AeHvszXF3Of7Q/4aztx+VCFLGpLz0FB4yv4rZ1V5bB+JJzetwqQ4kcRcQG72pIJoJZ DGN3zWZNtLbdQ== X-Nifty-SrcIP: [111.169.71.157] From: Masahiro Yamada To: linux-mtd@lists.infradead.org Cc: laurent.monat@idquantique.com, thorsten.christiansson@idquantique.com, Enrico Jorns , Artem Bityutskiy , Dinh Nguyen , Boris Brezillon , Marek Vasut , Graham Moore , David Woodhouse , Masami Hiramatsu , Chuanxiao Dong , Jassi Brar , Masahiro Yamada , linux-kernel@vger.kernel.org, Brian Norris , Richard Weinberger , Cyrille Pitchen Subject: [RESEND PATCH v2 23/53] mtd: nand: denali: set DEVICES_CONNECTED 1 if not set Date: Thu, 23 Mar 2017 05:07:22 +0900 Message-Id: <1490213273-8571-24-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1490213273-8571-1-git-send-email-yamada.masahiro@socionext.com> References: <1490213273-8571-1-git-send-email-yamada.masahiro@socionext.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk 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(+) -- 2.7.4 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;