From mboxrd@z Thu Jan 1 00:00:00 1970 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) From: Kamal Dasu To: linux-spi@vger.kernel.org, cyrille.pitchen@atmel.com, marex@denx.de, broonie@kernel.org Cc: linux-mtd@lists.infradead.org, f.fainelli@gmail.com, bcm-kernel-feedback-list@broadcom.com, Kamal Dasu 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> In-Reply-To: <1486763369-31969-1-git-send-email-kdasu.kdev@gmail.com> References: <1486763369-31969-1-git-send-email-kdasu.kdev@gmail.com> List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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, -- 1.9.1