From: "Song Bao Hua (Barry Song)" <song.bao.hua@hisilicon.com>
To: Jonathan Cameron <jic23@kernel.org>,
"linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>
Cc: Jonathan Cameron <jonathan.cameron@huawei.com>,
Lars-Peter Clausen <lars@metafoo.de>,
"tiantao (H)" <tiantao6@hisilicon.com>
Subject: RE: [PATCH 1/7] iio:adc:ad7766: Use new IRQF_NO_AUTOEN to reduce boilerplate
Date: Fri, 2 Apr 2021 20:10:38 +0000 [thread overview]
Message-ID: <339f74d2c0f64516b697b17aa306d20e@hisilicon.com> (raw)
In-Reply-To: <20210402184544.488862-2-jic23@kernel.org>
> -----Original Message-----
> From: Jonathan Cameron [mailto:jic23@kernel.org]
> Sent: Saturday, April 3, 2021 7:46 AM
> To: linux-iio@vger.kernel.org
> Cc: Song Bao Hua (Barry Song) <song.bao.hua@hisilicon.com>; Jonathan Cameron
> <jonathan.cameron@huawei.com>; Lars-Peter Clausen <lars@metafoo.de>
> Subject: [PATCH 1/7] iio:adc:ad7766: Use new IRQF_NO_AUTOEN to reduce
> boilerplate
>
> From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
>
> As iio_poll_trigger() is safe against spurious interrupts when the
> trigger is not enabled, this is not a fix despite looking like
> a race. It is nice to simplify the code however so the interrupt
> is never enabled in the first place.
>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Cc: Lars-Peter Clausen <lars@metafoo.de>
> ---
Reviewed-by: Barry Song <song.bao.hua@hisilicon.com>
BTW, +Cc Tiantao as Tao might be moving drivers to
use IRQF_NO_AUTOEN.
> drivers/iio/adc/ad7766.c | 15 +++++++--------
> 1 file changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/iio/adc/ad7766.c b/drivers/iio/adc/ad7766.c
> index 829a3426f235..1e41759f3ee5 100644
> --- a/drivers/iio/adc/ad7766.c
> +++ b/drivers/iio/adc/ad7766.c
> @@ -255,18 +255,17 @@ static int ad7766_probe(struct spi_device *spi)
> ad7766->trig->ops = &ad7766_trigger_ops;
> iio_trigger_set_drvdata(ad7766->trig, ad7766);
>
> - ret = devm_request_irq(&spi->dev, spi->irq, ad7766_irq,
> - IRQF_TRIGGER_FALLING, dev_name(&spi->dev),
> - ad7766->trig);
> - if (ret < 0)
> - return ret;
> -
> /*
> * The device generates interrupts as long as it is powered up.
> * Some platforms might not allow the option to power it down so
> - * disable the interrupt to avoid extra load on the system
> + * don't enable the interrupt to avoid extra load on the system
> */
> - disable_irq(spi->irq);
> + ret = devm_request_irq(&spi->dev, spi->irq, ad7766_irq,
> + IRQF_TRIGGER_FALLING | IRQF_NO_AUTOEN,
> + dev_name(&spi->dev),
> + ad7766->trig);
> + if (ret < 0)
> + return ret;
>
> ret = devm_iio_trigger_register(&spi->dev, ad7766->trig);
> if (ret)
> --
> 2.31.1
next prev parent reply other threads:[~2021-04-02 20:10 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-02 18:45 [PATCH 0/7] iio: Use IRQF_NO_AUTOEN Jonathan Cameron
2021-04-02 18:45 ` [PATCH 1/7] iio:adc:ad7766: Use new IRQF_NO_AUTOEN to reduce boilerplate Jonathan Cameron
2021-04-02 20:10 ` Song Bao Hua (Barry Song) [this message]
2021-04-05 14:27 ` Jonathan Cameron
2021-04-02 18:45 ` [PATCH 2/7] iio:adc:exynos-adc: Use new IRQF_NO_AUTOEN flag rather than separate irq_disable() Jonathan Cameron
2021-04-02 20:11 ` Song Bao Hua (Barry Song)
2021-04-04 19:20 ` Krzysztof Kozlowski
2021-04-05 14:29 ` Jonathan Cameron
2021-04-02 18:45 ` [PATCH 3/7] iio:adc:nau7802: Use IRQF_NO_AUTOEN instead of request then disable Jonathan Cameron
2021-04-02 20:12 ` Song Bao Hua (Barry Song)
2021-04-05 14:33 ` Jonathan Cameron
2021-04-02 18:45 ` [PATCH 4/7] iio:adc:sun4i-gpadc: Use new IRQF_NO_AUTOEN flag " Jonathan Cameron
2021-04-02 20:13 ` Song Bao Hua (Barry Song)
2021-04-05 14:35 ` Jonathan Cameron
2021-04-02 18:45 ` [PATCH 5/7] iio:chemical:scd30: Use IRQF_NO_AUTOEN to avoid irq " Jonathan Cameron
2021-04-02 20:14 ` Song Bao Hua (Barry Song)
2021-04-05 14:36 ` Jonathan Cameron
2021-04-02 18:45 ` [PATCH 6/7] iio:imu:adis: Use IRQF_NO_AUTOEN instead of " Jonathan Cameron
2021-04-02 20:37 ` Song Bao Hua (Barry Song)
2021-04-05 14:40 ` Jonathan Cameron
2021-04-06 11:48 ` Sa, Nuno
2021-04-02 18:45 ` [PATCH 7/7] iio:adc:ad_sigma_delta: Use IRQF_NO_AUTOEN rather than request and disable Jonathan Cameron
2021-04-02 20:30 ` Song Bao Hua (Barry Song)
2021-04-05 14:51 ` Jonathan Cameron
2021-04-05 22:56 ` Song Bao Hua (Barry Song)
2021-04-02 19:00 ` [PATCH 0/7] iio: Use IRQF_NO_AUTOEN Andy Shevchenko
2021-04-03 11:45 ` Lars-Peter Clausen
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