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Wed, 08 Feb 2017 08:56:14 -0800 (PST) Received: from mail.broadcom.com ([192.19.218.250]) by smtp.gmail.com with ESMTPSA id q22sm21714703pfj.77.2017.02.08.08.56.12 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 08 Feb 2017 08:56:14 -0800 (PST) From: Kamal Dasu To: linux-spi@vger.kernel.org, cyrille.pitchen@atmel.com, marex@denx.de, broonie@kernel.org Subject: [PATCH v2 2/2] mtd: m25p80: Added pm ops support Date: Wed, 8 Feb 2017 11:53:01 -0500 Message-Id: <1486572781-28808-3-git-send-email-kdasu.kdev@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1486572781-28808-1-git-send-email-kdasu.kdev@gmail.com> References: <1486572781-28808-1-git-send-email-kdasu.kdev@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170208_085735_968464_90D8C62F X-CRM114-Status: GOOD ( 10.42 ) X-Spam-Score: -3.4 (---) X-Spam-Report: SpamAssassin version 3.4.1 on bombadil.infradead.org summary: Content analysis details: (-3.4 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.5 RCVD_IN_SORBS_SPAM RBL: SORBS: sender is a spam source [209.85.192.195 listed in dnsbl.sorbs.net] -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [209.85.192.195 listed in list.dnswl.org] -1.9 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [209.85.192.195 listed in wl.mailspike.net] -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 9cf7fcd..69d309b 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_reset(&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,