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

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Date: Mon, 17 Jun 2024 17:13:53 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Trevor Gamblin <tgamblin@...libre.com>
CC: Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen <lars@...afoo.de>,
	Dmitry Rokosov <ddrokosov@...rdevices.ru>, "Michael Hennerich"
	<Michael.Hennerich@...log.com>, Cosmin Tanislav <cosmin.tanislav@...log.com>,
	Chen-Yu Tsai <wens@...e.org>, Hans de Goede <hdegoede@...hat.com>, Ray Jui
	<rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>, Broadcom internal
 kernel review list <bcm-kernel-feedback-list@...adcom.com>, Shawn Guo
	<shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix
 Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, Neil
 Armstrong <neil.armstrong@...aro.org>, Kevin Hilman <khilman@...libre.com>,
	"Jerome Brunet" <jbrunet@...libre.com>, Martin Blumenstingl
	<martin.blumenstingl@...glemail.com>, Saravanan Sekar <sravanhome@...il.com>,
	Orson Zhai <orsonzhai@...il.com>, Baolin Wang
	<baolin.wang@...ux.alibaba.com>, Chunyan Zhang <zhang.lyra@...il.com>, Maxime
 Coquelin <mcoquelin.stm32@...il.com>, Alexandre Torgue
	<alexandre.torgue@...s.st.com>, Nuno Sá
	<nuno.sa@...log.com>, Linus Walleij <linus.walleij@...aro.org>, Jean-Baptiste
 Maneyrol <jmaneyrol@...ensense.com>, Crt Mori <cmo@...exis.com>,
	<linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <imx@...ts.linux.dev>,
	<linux-amlogic@...ts.infradead.org>, <linux-arm-msm@...r.kernel.org>,
	<linux-stm32@...md-mailman.stormreply.com>, Uwe Kleine-König <u.kleine-koenig@...libre.com>
Subject: Re: [PATCH v3 22/41] iio: gyro: mpu3050-core: make use of
 regmap_clear_bits(), regmap_set_bits()

On Mon, 17 Jun 2024 09:50:02 -0400
Trevor Gamblin <tgamblin@...libre.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@...libre.com>
> Signed-off-by: Trevor Gamblin <tgamblin@...libre.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;
>  
>