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Thu, 29 Aug 2024 12:52:33 +0200 Message-ID: <6bc3f830-13dc-4df1-ad41-6228976c0dcd@gmx.net> Date: Thu, 29 Aug 2024 12:52:32 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/5] i2c: imx-lpi2c: add IRQF_NO_SUSPEND IRQ flag To: carlos.song@nxp.com, aisheng.dong@nxp.com, andi.shyti@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com Cc: linux-i2c@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: <20240829093722.2714921-1-carlos.song@nxp.com> <20240829093722.2714921-2-carlos.song@nxp.com> Content-Language: en-US From: Stefan Wahren In-Reply-To: <20240829093722.2714921-2-carlos.song@nxp.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:IZF4z6LFDGWBDTHQmU1hyulDnSwdCxDIpXwFGk+40pRSrd3vRqc X0Qi6w/NOf+ij/skXAg0ZPK3IVfNSLxwIfy5ZWBDifBH4HBLBgeq3/bjsIaSTdQgRfiPuDY /+w8Hl4pOmA1cPvDZ+L2RTBrJpynuRpaxlj6fC2u9MHGRUG0xwTpAL0dVB5yHHHewaj7TQ3 qsXnDv2fqD5SX5VKIgN3A== UI-OutboundReport: notjunk:1;M01:P0:1a903cghFHM=;KssrqL7utNOx45/jKKQCup5EE2l SbWB1W/15VQhe6couMaXIXZmtO5mAf0H7zi09yIqHnU7GAOIejXLFL8r2ayWfHdsACBACk3Z+ 9KqVFN2qVhfzjPWkb9AMPL8y2wNQMh/nSe4KecXMUqDZyeFldXEE7G10XzcNI++2XX0alRa/B lkMz+82+RhWvVjuRYGlKBDmqXo5/QsGlxd0n3JP7YvcOtWggON+zm/mAFgLDycFssfrNRSJUH coIAb/Qu3BWrDcQjKL21eR6WjjOkmI+krFizDYy/zEGGab5x2bp42AU4gE+ve9Shm4jRWVDbu Sl8BZUldcN+GhBqDvkdh9FTldQ2I2zuntt3kvpLiDFAVHMotJwigfW472MoAHumBUaoeXEHzV hBU94dzFtk06OgXh7DO8Doii86k1LasDIa+LErMudK7W34TPNhkhZlHBTzaowpfImTbrjITKo lxRcQ+kz+H9j8+9ywmWnG0X0lwZwiaSXApS0HE0jFCkkBW1zLofPd0XpTk9443xmAQasWvfGI de9e5fscWs6x7wqRsQw0FGLMiECNvoUcaaL783ChoFV+/yENspoBne9KAkI5DaETCGeMaNA8c ycniuvRw+9UkwOIqfTC2mjnP5amGQmx6zWwJBofn64mFcXWgu2CvBJ5mGMuqhG2ZahUwGnCNe N2KVTBfxzwMJ/mIbwRDsWRKhCYDwiAdIrHvlcmte6O3hpMHCoZLbZ+EEJ38tQx/d5pJUSQfb3 xu+jgx0AkHlHrOh0oFsQe5HvvcYwb7T0tsFHuHek44Mt/f0psfFXLeQX/idtbvEQcjoICEaX3 3pbKL+vkUZlsMpCL9A9k69oA== X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240829_035239_236614_3906E917 X-CRM114-Status: GOOD ( 13.24 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Carlos, Am 29.08.24 um 11:37 schrieb carlos.song@nxp.com: > From: Carlos Song > > Set IRQF_NO_SUSPEND flag when request_irq(). Some devices such > as extend GPIO will need i2c transfer during the entire system > suspend and resume period so keep it enabled. do you mean GPIO expander which are connected to I2C? Do the mentioned expander have a dedicated IRQ line or does the host needs to poll I2C? Best regards > > Signed-off-by: Carlos Song > Signed-off-by: Frank Li > --- > drivers/i2c/busses/i2c-imx-lpi2c.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c= -imx-lpi2c.c > index c8f3dadfb36e..23f83f10d5f6 100644 > --- a/drivers/i2c/busses/i2c-imx-lpi2c.c > +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c > @@ -1309,7 +1309,7 @@ static int lpi2c_imx_probe(struct platform_device = *pdev) > if (ret) > lpi2c_imx->bitrate =3D I2C_MAX_STANDARD_MODE_FREQ; > > - ret =3D devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr, 0, > + ret =3D devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr, IRQF_NO_SUSPE= ND, > pdev->name, lpi2c_imx); > if (ret) > return dev_err_probe(&pdev->dev, ret, "can't claim irq %d\n", irq);