From patchwork Wed Feb 22 19:19:33 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Dasu X-Patchwork-Id: 731292 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 3vT6gH285Rz9s2G for ; Thu, 23 Feb 2017 06:21:47 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="UmVjp77q"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="nDyzD2V8"; dkim-atps=neutral DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=ZkX/O+HozBEvAYQGggaFaRE825DzsKDZOUndFZxujDw=; b=UmVjp77qZDsyffsvxlC0rH2HPH Gb+zVdasiKLZBOsALxFDF5k40sqi9PV9gmXDKRxp0ibUcPShcSiLovtQgHLCszJ64n7tY10jfhAYm rHWE9gBNC21ky/io4W4JUUO0w2LFFnB+tjIhDmEIlAw9t/urNicvdEKQDWbWjoHme1s86M5GW8lDX pc33bm6/MPaQAudPMBnwg5iusThuQpbmksCyI04XywU/R23rFH7Di294F+WYaRAfO5SHVpO4jeMaI Tm0PjokC1+Y0OswTqBC9wMs7ZpJ9cE0JXnVmNVmopJDk/pbWYGVFnKZdhJOSer7+Vcn/MjbxK1Igc mdozsOSA==; 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 1cgcTt-0000Mp-CO; Wed, 22 Feb 2017 19:21:41 +0000 Received: from mail-qk0-x243.google.com ([2607:f8b0:400d:c09::243]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1cgcSv-00080Z-9t for linux-mtd@lists.infradead.org; Wed, 22 Feb 2017 19:20:44 +0000 Received: by mail-qk0-x243.google.com with SMTP id s186so1824180qkb.1 for ; Wed, 22 Feb 2017 11:20:20 -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=gZHAybK419UnWWWYOAYqEZupGYVUF63jlLIAre6yHGU=; b=nDyzD2V8D+e7qWDEE4+0/hTIwTkuYpOyDNBljC2UaNTr4cjtCLOgEnMU/spEGYrHXa gvGboEbyt1VNMUJPEGZg49LvlMnox/xYnLE8GC8bQ5BRF7kPq/txHHxDM0oMqX/H7ipD RHragsWQOsQmSlFmzzzAX6K6Xo3B9+/eC2y00bUJKZSloJO3Ux9PoIWdk+JM3jpZ5D3k E5eEIgO/yEVsoClhmazQU3U3W/yk7W8VCgNG29eLdCZNSPGgC/2Bf/y+MCWwOkxU7uYV /pKGWJ7dZ2Sw0hmtmZTWVq9+yf3G3QuqxkP/3R939FaxxAbEQ++BjI3I1RHGDNOHc/Wc peTg== 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=gZHAybK419UnWWWYOAYqEZupGYVUF63jlLIAre6yHGU=; b=SfNXUeD9ocEJw93XGjma0S+2kweAltxfGC11XkpV6ng0ayWDOJvOqAyboNiqu4teNj cCYQUcaaBbd4dFBn33OZBN7yAlXaBIFBkxcWegFpQoiBiX3+7cXKQH0gVyZRhb39H3j2 Yq2SCNqQHOVEBc7aassOwdjxqriQWGGCa793AKshVZXhf9OUvd4gkux81c8Ra3PlxFAC 4OolganmpdaIuGV+dLqHY23bQ88pqb6BFNpWjnjpd0xE1RSMCWSQBaohPkGN5Yz6W82g y77MwLjkVQ06i3BoQxEWaFclMa7NLQWtaqM4YAKzrYK9M4hpgLEiskbC80ixuuQPoghB w14w== X-Gm-Message-State: AMke39kWAJiNG8msOnzVYUn3cxg5ukSnjQJNvdniOxJxwQZH2KIL+18AkeHXnTnWZ01/Xg== X-Received: by 10.55.20.68 with SMTP id e65mr37034566qkh.257.1487791219706; Wed, 22 Feb 2017 11:20:19 -0800 (PST) Received: from mail.broadcom.com ([192.19.224.250]) by smtp.gmail.com with ESMTPSA id c41sm1240963qta.65.2017.02.22.11.20.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 22 Feb 2017 11:20:19 -0800 (PST) From: Kamal Dasu To: linux-spi@vger.kernel.org, cyrille.pitchen@atmel.com, marex@denx.de, broonie@kernel.org Subject: [PATCH v5 2/2] mtd: m25p80: Added pm ops support Date: Wed, 22 Feb 2017 14:19:33 -0500 Message-Id: <1487791173-22159-3-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1487791173-22159-1-git-send-email-kdasu.kdev@gmail.com> References: <1487791173-22159-1-git-send-email-kdasu.kdev@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170222_112041_963104_C93B44B3 X-CRM114-Status: UNSURE ( 9.83 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2607:f8b0:400d:c09:0:0:0:243 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (kdasu.kdev[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -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_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 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 reinitialize spi-nor device and set it to right transfer mode in its pre-suspend state. Some SoC implementations might power down the spi-nor flash and loose its initial settings on suspend. A resume should restore part settings to its original pre-suspend state. Signed-off-by: Kamal Dasu --- drivers/mtd/devices/m25p80.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c index c4df3b1..3ab30b2 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -324,10 +324,21 @@ static int m25p_remove(struct spi_device *spi) }; MODULE_DEVICE_TABLE(of, m25p_of_table); +#ifdef CONFIG_PM_SLEEP +static int m25p_resume(struct device *dev) +{ + struct m25p *flash = dev_get_drvdata(dev); + + return spi_nor_init(&flash->spi_nor); +} +#endif +static SIMPLE_DEV_PM_OPS(m25p_pm_ops, NULL, 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,