Re: [PATCH v3 22/41] iio: gyro: mpu3050-core: make use of regmap_clear_bits(), regmap_set_bits()

From: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
To: Trevor Gamblin <tgamblin@baylibre.com>
Cc: "Jonathan Cameron" <jic23@kernel.org>,
	"Lars-Peter Clausen" <lars@metafoo.de>,
	"Dmitry Rokosov" <ddrokosov@sberdevices.ru>,
	"Michael Hennerich" <Michael.Hennerich@analog.com>,
	"Cosmin Tanislav" <cosmin.tanislav@analog.com>,
	"Chen-Yu Tsai" <wens@csie.org>,
	"Hans de Goede" <hdegoede@redhat.com>,
	"Ray Jui" <rjui@broadcom.com>,
	"Scott Branden" <sbranden@broadcom.com>,
	"Broadcom internal kernel review list"
	<bcm-kernel-feedback-list@broadcom.com>,
	"Shawn Guo" <shawnguo@kernel.org>,
	"Sascha Hauer" <s.hauer@pengutronix.de>,
	"Pengutronix Kernel Team" <kernel@pengutronix.de>,
	"Fabio Estevam" <festevam@gmail.com>,
	"Neil Armstrong" <neil.armstrong@linaro.org>,
	"Kevin Hilman" <khilman@baylibre.com>,
	"Jerome Brunet" <jbrunet@baylibre.com>,
	"Martin Blumenstingl" <martin.blumenstingl@googlemail.com>,
	"Saravanan Sekar" <sravanhome@gmail.com>,
	"Orson Zhai" <orsonzhai@gmail.com>,
	"Baolin Wang" <baolin.wang@linux.alibaba.com>,
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	"Maxime Coquelin" <mcoquelin.stm32@gmail.com>,
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	"Nuno Sá" <nuno.sa@analog.com>,
	"Linus Walleij" <linus.walleij@linaro.org>,
	"Jean-Baptiste Maneyrol" <jmaneyrol@invensense.com>,
	"Crt Mori" <cmo@melexis.com>,
	linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev,
	linux-amlogic@lists.infradead.org, linux-arm-msm@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	"Uwe Kleine-König" <u.kleine-koenig@baylibre.com>
Subject: Re: [PATCH v3 22/41] iio: gyro: mpu3050-core: make use of regmap_clear_bits(), regmap_set_bits()
Date: Mon, 17 Jun 2024 17:13:53 +0100	[thread overview]
Message-ID: <20240617171353.00006b1f@Huawei.com> (raw)
In-Reply-To: <20240617-review-v3-22-88d1338c4cca@baylibre.com>

On Mon, 17 Jun 2024 09:50:02 -0400
Trevor Gamblin <tgamblin@baylibre.com> wrote:

> Instead of using regmap_update_bits() and passing the mask twice, use
> regmap_set_bits().
> 
> Instead of using regmap_update_bits() and passing val = 0, use
> regmap_clear_bits().
> 
> Suggested-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
> Signed-off-by: Trevor Gamblin <tgamblin@baylibre.com>
> ---
>  drivers/iio/gyro/mpu3050-core.c | 33 ++++++++++++---------------------
>  1 file changed, 12 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/iio/gyro/mpu3050-core.c b/drivers/iio/gyro/mpu3050-core.c
> index a791ba3a693a..ff1c81553045 100644
> --- a/drivers/iio/gyro/mpu3050-core.c
> +++ b/drivers/iio/gyro/mpu3050-core.c
> @@ -197,8 +197,8 @@ static int mpu3050_start_sampling(struct mpu3050 *mpu3050)
>  	int i;
>  
>  	/* Reset */
> -	ret = regmap_update_bits(mpu3050->map, MPU3050_PWR_MGM,
> -				 MPU3050_PWR_MGM_RESET, MPU3050_PWR_MGM_RESET);
> +	ret = regmap_set_bits(mpu3050->map, MPU3050_PWR_MGM,
> +			      MPU3050_PWR_MGM_RESET);
>  	if (ret)
>  		return ret;
>  
> @@ -513,12 +513,8 @@ static irqreturn_t mpu3050_trigger_handler(int irq, void *p)
>  				 "FIFO overflow! Emptying and resetting FIFO\n");
>  			fifo_overflow = true;
>  			/* Reset and enable the FIFO */
> -			ret = regmap_update_bits(mpu3050->map,
> -						 MPU3050_USR_CTRL,
> -						 MPU3050_USR_CTRL_FIFO_EN |
> -						 MPU3050_USR_CTRL_FIFO_RST,
> -						 MPU3050_USR_CTRL_FIFO_EN |
> -						 MPU3050_USR_CTRL_FIFO_RST);
> +			ret = regmap_set_bits(mpu3050->map, MPU3050_USR_CTRL,
> +					      MPU3050_USR_CTRL_FIFO_EN | MPU3050_USR_CTRL_FIFO_RST);

I'll probably break this line up whilst applying.

>  			if (ret) {
>  				dev_info(mpu3050->dev, "error resetting FIFO\n");
>  				goto out_trigger_unlock;
> @@ -799,10 +795,8 @@ static int mpu3050_hw_init(struct mpu3050 *mpu3050)
>  	u64 otp;
>  
>  	/* Reset */
> -	ret = regmap_update_bits(mpu3050->map,
> -				 MPU3050_PWR_MGM,
> -				 MPU3050_PWR_MGM_RESET,
> -				 MPU3050_PWR_MGM_RESET);
> +	ret = regmap_set_bits(mpu3050->map, MPU3050_PWR_MGM,
> +			      MPU3050_PWR_MGM_RESET);
>  	if (ret)
>  		return ret;
>  
> @@ -872,8 +866,8 @@ static int mpu3050_power_up(struct mpu3050 *mpu3050)
>  	msleep(200);
>  
>  	/* Take device out of sleep mode */
> -	ret = regmap_update_bits(mpu3050->map, MPU3050_PWR_MGM,
> -				 MPU3050_PWR_MGM_SLEEP, 0);
> +	ret = regmap_clear_bits(mpu3050->map, MPU3050_PWR_MGM,
> +				MPU3050_PWR_MGM_SLEEP);
>  	if (ret) {
>  		regulator_bulk_disable(ARRAY_SIZE(mpu3050->regs), mpu3050->regs);
>  		dev_err(mpu3050->dev, "error setting power mode\n");
> @@ -895,8 +889,8 @@ static int mpu3050_power_down(struct mpu3050 *mpu3050)
>  	 * then we would be wasting power unless we go to sleep mode
>  	 * first.
>  	 */
> -	ret = regmap_update_bits(mpu3050->map, MPU3050_PWR_MGM,
> -				 MPU3050_PWR_MGM_SLEEP, MPU3050_PWR_MGM_SLEEP);
> +	ret = regmap_set_bits(mpu3050->map, MPU3050_PWR_MGM,
> +			      MPU3050_PWR_MGM_SLEEP);
>  	if (ret)
>  		dev_err(mpu3050->dev, "error putting to sleep\n");
>  
> @@ -997,11 +991,8 @@ static int mpu3050_drdy_trigger_set_state(struct iio_trigger *trig,
>  			return ret;
>  
>  		/* Reset and enable the FIFO */
> -		ret = regmap_update_bits(mpu3050->map, MPU3050_USR_CTRL,
> -					 MPU3050_USR_CTRL_FIFO_EN |
> -					 MPU3050_USR_CTRL_FIFO_RST,
> -					 MPU3050_USR_CTRL_FIFO_EN |
> -					 MPU3050_USR_CTRL_FIFO_RST);
> +		ret = regmap_set_bits(mpu3050->map, MPU3050_USR_CTRL,
> +				      MPU3050_USR_CTRL_FIFO_EN | MPU3050_USR_CTRL_FIFO_RST);
and this one.

Assuming we don't need a v4 for some other reason,

Jonathan

>  		if (ret)
>  			return ret;
>  
> 