From patchwork Fri Feb 3 23:31:13 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Dasu X-Patchwork-Id: 723967 X-Patchwork-Delegate: cyrille.pitchen@atmel.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3vFY8K72mtz9s4s for ; Sat, 4 Feb 2017 10:33:21 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="Q7/FIjmf"; dkim-atps=neutral Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cZnM0-0005G7-72; Fri, 03 Feb 2017 23:33:20 +0000 Received: from mail-qt0-f193.google.com ([209.85.216.193]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cZnLf-0004p3-DN for linux-mtd@lists.infradead.org; Fri, 03 Feb 2017 23:33:01 +0000 Received: by mail-qt0-f193.google.com with SMTP id h53so7674673qth.3 for ; Fri, 03 Feb 2017 15:32:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=9gCf8yr62/9kQQlDGh9RgVEh5JJBRZYHabJ60Re3ucs=; b=Q7/FIjmfga6SDOyOE/28Rc+HftGpPfyU+vPw/uefVpFWHGBwwYD6LWZSJnQbfZXfYx au7QOsXBi9CVzjsjAdCpS3WZoN9QrukRhLWFS97IcSjpa+H3N/XRG6C14Gk/RHVgKg8V w+JAr1HDKB6dlaUpzuCbffbPzL4tumsX4BATrtlSwk5ujhRYRN5UtsO2Gc/Hiux1cfqT r/gGOYhUEU5uvRxJzU+mKhleGsDBFbVmI/86KvDByf3OFOSrqAjOZS86N+UgfPg9Tlo0 XWuvjyguhNosRff2KOK4I+qOlvR67X0Y1WFlCRjFy4Udr5y9BKhD0YNkFsiO4VuTcJAq HnQw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=9gCf8yr62/9kQQlDGh9RgVEh5JJBRZYHabJ60Re3ucs=; b=KP4jFpMV/s1bJ4999Nf6rPfBeDN/0EXIG+XdTkPg/OxYngcSZcddiCnNinZKugEkRa A4NfeKE/8pNwn8ZiPMwDEhz3LkoUnNMr9XvCye2wuVuB/OLb4I+L3BQNejkZ57UMT3rn mhK2X4v38kehSk0H4uREt7hG2Zt0eIllybTDjzTb7SN9WEiJYa3zuk9OJq0qZAxvZ0wA giu62m8qrGGM+4x68B8Tal+zkOP+9LlLoZuHUW3zDCVl1p2+pvh+32ExeZd9q/Za+SCa j5OUCq1Ujf3DcPlpdddg5AGdLujbqKMZhjrFYXw2JZSy/0RXx1gYhONHp0+t2pNn1gmr GS1Q== X-Gm-Message-State: AMke39myHoCslcn73/SjeOgENOPh5eGwVvigf1M5fyE4cSa7wkgGnARhsZ9ThOstxbvxZg== X-Received: by 10.55.15.234 with SMTP id 103mr16724560qkp.282.1486164698194; Fri, 03 Feb 2017 15:31:38 -0800 (PST) Received: from mail.broadcom.com ([192.19.218.250]) by smtp.gmail.com with ESMTPSA id 140sm25747914qkj.19.2017.02.03.15.31.36 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 03 Feb 2017 15:31:37 -0800 (PST) From: Kamal Dasu To: linux-spi@vger.kernel.org, cyrille.pitchen@atmel.com, marex@denx.de, broonie@kernel.org Subject: [PATCH v1 2/5] mtd: m25p80: Added pm ops support Date: Fri, 3 Feb 2017 18:31:13 -0500 Message-Id: <1486164676-12912-3-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1486164676-12912-1-git-send-email-kdasu.kdev@gmail.com> References: <1486164676-12912-1-git-send-email-kdasu.kdev@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170203_153259_571431_2263E35F X-CRM114-Status: UNSURE ( 9.35 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.5 (-) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-1.5 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.5 RCVD_IN_SORBS_SPAM RBL: SORBS: sender is a spam source [209.85.216.193 listed in dnsbl.sorbs.net] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [209.85.216.193 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (kdasu.kdev[at]gmail.com) -0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [209.85.216.193 listed in wl.mailspike.net] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: bcm-kernel-feedback-list@broadcom.com, f.fainelli@gmail.com, linux-mtd@lists.infradead.org, Kamal Dasu MIME-Version: 1.0 Sender: "linux-mtd" Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Added power management ops for resume to be able to resan spi-nor device and set it to right transfer modes in its probed state after poweron. Some SoC implementations might power down the spi-nor flash and loose its initial settings on suspend. A resume should retore the part to its probed state. Signed-off-by: Kamal Dasu --- drivers/mtd/devices/m25p80.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index 9cf7fcd..4528e33 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -319,10 +319,26 @@ static int m25p_remove(struct spi_device *spi) }; MODULE_DEVICE_TABLE(of, m25p_of_table); +#ifdef CONFIG_PM_SLEEP +static int m25p_suspend(struct device *dev) +{ + return 0; +} + +static int m25p_resume(struct device *dev) +{ + struct m25p *flash = dev_get_drvdata(dev); + + return spi_nor_pm_rescan(&flash->spi-nor, NULL); +} +#endif +static SIMPLE_DEV_PM_OPS(m25p_pm_ops, m25p_suspend, m25p_resume); + static struct spi_driver m25p80_driver = { .driver = { .name = "m25p80", .of_match_table = m25p_of_table, + .pm = &m25p_pm_ops, }, .id_table = m25p_ids, .probe = m25p_probe,