linux-kernel - Re: [PATCH v3 10/15] iio: resolver: ad2s1210: use bitmap

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Message-ID: <20250211194658.0cfb437b@jic23-huawei>
Date: Tue, 11 Feb 2025 19:46:58 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: David Lechner <dlechner@...libre.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski
 <brgl@...ev.pl>, Andy Shevchenko <andy@...nel.org>, Geert Uytterhoeven
 <geert@...ux-m68k.org>, Lars-Peter Clausen <lars@...afoo.de>, Michael
 Hennerich <Michael.Hennerich@...log.com>, Ulf Hansson
 <ulf.hansson@...aro.org>, Peter Rosin <peda@...ntia.se>, Andrew Lunn
 <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, Russell King
 <linux@...linux.org.uk>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo
 Abeni <pabeni@...hat.com>, Vinod Koul <vkoul@...nel.org>, Kishon Vijay
 Abraham I <kishon@...nel.org>, Nuno Sá <nuno.sa@...log.com>,
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
 Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
 linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-iio@...r.kernel.org, linux-mmc@...r.kernel.org,
 netdev@...r.kernel.org, linux-phy@...ts.infradead.org,
 linux-sound@...r.kernel.org
Subject: Re: [PATCH v3 10/15] iio: resolver: ad2s1210: use bitmap_write

On Mon, 10 Feb 2025 16:33:36 -0600
David Lechner <dlechner@...libre.com> wrote:

> Replace bitmap array access with bitmap_write.
> 
> Accessing the bitmap array directly is not recommended and now there is
> a helper function that can be used.
> 
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: David Lechner <dlechner@...libre.com>
Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/iio/resolver/ad2s1210.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/resolver/ad2s1210.c b/drivers/iio/resolver/ad2s1210.c
> index 7f18df790157f1e411fb70de193a49f0677c999f..04879e6d538bce664469c5f6759d8b1cedea16e9 100644
> --- a/drivers/iio/resolver/ad2s1210.c
> +++ b/drivers/iio/resolver/ad2s1210.c
> @@ -46,6 +46,7 @@
>   */
>  
>  #include <linux/bitfield.h>
> +#include <linux/bitmap.h>
>  #include <linux/bits.h>
>  #include <linux/cleanup.h>
>  #include <linux/clk.h>
> @@ -180,7 +181,7 @@ static int ad2s1210_set_mode(struct ad2s1210_state *st, enum ad2s1210_mode mode)
>  	if (!gpios)
>  		return mode == st->fixed_mode ? 0 : -EOPNOTSUPP;
>  
> -	bitmap[0] = mode;
> +	bitmap_write(bitmap, mode, 0, 2);
>  
>  	return gpiod_multi_set_value_cansleep(gpios, bitmap);
>  }
> @@ -1470,7 +1471,7 @@ static int ad2s1210_setup_gpios(struct ad2s1210_state *st)
>  			return dev_err_probe(dev, -EINVAL,
>  				      "requires exactly 2 resolution-gpios\n");
>  
> -		bitmap[0] = st->resolution;
> +		bitmap_write(bitmap, st->resolution, 0, 2);
>  
>  		ret = gpiod_multi_set_value_cansleep(resolution_gpios, bitmap);
>  		if (ret < 0)
>