From patchwork Fri Feb 10 21:49:29 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Dasu X-Patchwork-Id: 726753 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 3vKq0Q5yVyz9s82 for ; Sat, 11 Feb 2017 09:11:18 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="hiV+gfHO"; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="Ko7khPgk"; 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=rHlb44LK+UWRdhwRtgRjgdzBRePKKVEyhWCM4mklLLc=; b=hiV+gfHOGHXTxQu2hzlqjAK62R dAlJX2Kmj9KM9HMAK4vWD5El3qfwDBUktWjfJz+3rmoJRtCsqubSfzATUXcsS47xCHXtiPlPGYzXR WDMlEzPJ8TgZ0JrS4hykIHD31pTFkNCedrZQQNqv7HaJUCELdxLISXdSnteTlH0Kzi7inQbtnlcVa kkAMeAKKhdKG60IWZ1fCm6NxsZiZhmAOVjLCgJ7L68TaoCFas2f/PJhWJimhkH+zFr/gi1oDNM8HK PU2yCgc6j3UyJ4A95f7o5jNku5rU5irbMvURsByvV7sD5WUf8Ap8BHm8a/yq4UlPSW+4YA4s2Zj/c R6uZNNfw==; 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 1ccJPP-0007LP-RM; Fri, 10 Feb 2017 22:11:15 +0000 Received: from mail-wr0-x241.google.com ([2a00:1450:400c:c0c::241]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1ccJPL-00074C-5q for linux-mtd@lists.infradead.org; Fri, 10 Feb 2017 22:11:13 +0000 Received: by mail-wr0-x241.google.com with SMTP id k90so16406166wrc.3 for ; Fri, 10 Feb 2017 14:10:50 -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=holTK6u5lG14QR3VYIPYP/k5zC8CSM2dnn2X1G3JzRI=; b=Ko7khPgkH8oRj1/pmUUTIDiveNdnbSW8GiyMwM7UpOvxNCetIEhjlET6qxYyzaInl+ EgRqY7zrfKWfLPzqG9Cu/0eTXu5KCAuTfTu1dsS4Cb+gAAJecpZaoIc1IzSt+Gb6mOQt IPeU22ECVOyJL6PXEyAE7Lq76RNotsteN7TGu9F5Wd0ysGE35VMuEZEyJn9o2wviRETN ZM8DLRp08NTA6vE11Po/PRAbIqe364Np3W1tfvt44swdiiMIVn7x1pZGVKnPtsIzoTiG Jw0nI/SR+3P7UYCBh47p+NJQHaitypQWEtgUKqt/wZh5KANqLRVuK8yHFWbXvrEM4Y2D 62vQ== 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=holTK6u5lG14QR3VYIPYP/k5zC8CSM2dnn2X1G3JzRI=; b=ESzl9+9xgOuJfRw5rXeO5+7uhS3ERJFonNwZ/MYheTgNEM9qHOwHf67nocCFJcxeyQ ke7hlKnguQB62qBR+ssOiY9r50YYoR0xw3v9mHwYTKUUxz6mtJD+MP42l6aoC9emZoLT QyVOhBvKV+eIOdmoqksxLm9mxplzOm1SR4pihBC+ELVzeb5HpajOZis42RxjbStIeMc3 kq6Fn+8wi6bwmzFqJXnvb9/FgsDTTQgx1VXiqKNtqAfcBFqcMRUNxxmB2zL4HxT/EKrP wCe0GVnJYUC9oRBslgfk+GuHU8HTwcH6U+aMOdCEVPhc4KOfzUqA5ZnRvhbW82YbXKqv R35A== X-Gm-Message-State: AMke39mXHPQYG5hmRSId5xIoc0sE1Fs3zNy36fG7GG18WDivKtBGcLjdJaIQcHRUS/wGCQ== X-Received: by 10.223.171.65 with SMTP id r1mr9311635wrc.38.1486764649456; Fri, 10 Feb 2017 14:10:49 -0800 (PST) Received: from mail.broadcom.com ([192.19.218.250]) by smtp.gmail.com with ESMTPSA id u184sm1251473wmb.29.2017.02.10.14.10.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 10 Feb 2017 14:10:49 -0800 (PST) From: Kamal Dasu To: linux-spi@vger.kernel.org, cyrille.pitchen@atmel.com, marex@denx.de, broonie@kernel.org Subject: [PATCH v3 2/2] mtd: m25p80: Added pm ops support Date: Fri, 10 Feb 2017 16:49:29 -0500 Message-Id: <1486763369-31969-3-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1486763369-31969-1-git-send-email-kdasu.kdev@gmail.com> References: <1486763369-31969-1-git-send-email-kdasu.kdev@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170210_141111_450886_EF8B3222 X-CRM114-Status: UNSURE ( 9.59 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.0 (--) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-2.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -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) -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] 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 -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 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 c4df3b1..be94fba 100644 --- a/drivers/mtd/devices/m25p80.c +++ b/drivers/mtd/devices/m25p80.c @@ -324,10 +324,26 @@ 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_init(&flash->spi_nor); +} +#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,