From mboxrd@z Thu Jan 1 00:00:00 1970 From: alexandre.belloni@bootlin.com (Alexandre Belloni) Date: Wed, 4 Jul 2018 10:57:11 +0200 Subject: [PATCH v2] mtd: atmel-quadspi: add suspend/resume hooks In-Reply-To: References: <1528101993-4772-1-git-send-email-claudiu.beznea@microchip.com> Message-ID: <20180704085711.GI14626@piout.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 04/07/2018 11:42:25+0300, Tudor Ambarus wrote: > Hi, Claudiu, > > On 06/04/2018 11:46 AM, Claudiu Beznea wrote: > > Implement suspend/resume hooks. > > > > Signed-off-by: Claudiu Beznea > > --- > > > > Changes in v2: > > - use __maybe_unused instead of #ifdef CONFIG_PM_SLEEP > > > > drivers/mtd/spi-nor/atmel-quadspi.c | 21 +++++++++++++++++++++ > > 1 file changed, 21 insertions(+) > > > > diff --git a/drivers/mtd/spi-nor/atmel-quadspi.c b/drivers/mtd/spi-nor/atmel-quadspi.c > > index 6c5708bacad8..ceaaef47f02e 100644 > > --- a/drivers/mtd/spi-nor/atmel-quadspi.c > > +++ b/drivers/mtd/spi-nor/atmel-quadspi.c > > @@ -737,6 +737,26 @@ static int atmel_qspi_remove(struct platform_device *pdev) > > return 0; > > } > > > > +static int __maybe_unused atmel_qspi_suspend(struct device *dev) > > +{ > > + struct atmel_qspi *aq = dev_get_drvdata(dev); > > + > > + clk_disable_unprepare(aq->clk); > > + > > + return 0; > > +} > > + > > +static int __maybe_unused atmel_qspi_resume(struct device *dev) > > +{ > > + struct atmel_qspi *aq = dev_get_drvdata(dev); > > + > > + clk_prepare_enable(aq->clk); > > You missed to verify the return value of clk_prepare_enable. Otherwise looks Which will never fail, there is no point in checking it. > good. I've also looked over the test with suspending while copying on a ubifs > mounted on QSPI NOR, looks good too. > > After checking the return value, please add: > Reviewed-by: Tudor Ambarus > -- Alexandre Belloni, Bootlin (formerly Free Electrons) Embedded Linux and Kernel engineering https://bootlin.com