From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: William Breathitt Gray <vilhelm.gray@gmail.com>
Cc: linux-arch@vger.kernel.org, linux-gpio@vger.kernel.org,
yamada.masahiro@socionext.com, linus.walleij@linaro.org,
linux-pm@vger.kernel.org, linux@rasmusvillemoes.dk,
linux-kernel@vger.kernel.org, bgolaszewski@baylibre.com,
lukas@wunner.de, geert@linux-m68k.org, akpm@linux-foundation.org,
preid@electromag.com.au, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v18 14/14] gpio: pca953x: Utilize the for_each_set_clump8 macro
Date: Thu, 10 Oct 2019 16:16:55 +0300 [thread overview]
Message-ID: <20191010131655.GS32742@smile.fi.intel.com> (raw)
In-Reply-To: <3543ffc3668ad4ed4c00e8ebaf14a5559fd6ddf2.1570641097.git.vilhelm.gray@gmail.com>
On Wed, Oct 09, 2019 at 01:14:50PM -0400, William Breathitt Gray wrote:
> Replace verbose implementation in set_multiple callback with
> for_each_set_clump8 macro to simplify code and improve clarity.
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Cc: Phil Reid <preid@electromag.com.au>
> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
> ---
> drivers/gpio/gpio-pca953x.c | 17 +++++++----------
> 1 file changed, 7 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
> index de5d1383f28d..10b669b8f27d 100644
> --- a/drivers/gpio/gpio-pca953x.c
> +++ b/drivers/gpio/gpio-pca953x.c
> @@ -10,6 +10,7 @@
>
> #include <linux/acpi.h>
> #include <linux/bits.h>
> +#include <linux/bitops.h>
> #include <linux/gpio/driver.h>
> #include <linux/gpio/consumer.h>
> #include <linux/i2c.h>
> @@ -456,7 +457,8 @@ static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
> unsigned long *mask, unsigned long *bits)
> {
> struct pca953x_chip *chip = gpiochip_get_data(gc);
> - unsigned int bank_mask, bank_val;
> + unsigned long offset;
> + unsigned long bank_mask;
> int bank;
> u8 reg_val[MAX_BANK];
> int ret;
> @@ -466,15 +468,10 @@ static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
> if (ret)
> goto exit;
>
> - for (bank = 0; bank < NBANK(chip); bank++) {
> - bank_mask = mask[bank / sizeof(*mask)] >>
> - ((bank % sizeof(*mask)) * 8);
> - if (bank_mask) {
> - bank_val = bits[bank / sizeof(*bits)] >>
> - ((bank % sizeof(*bits)) * 8);
> - bank_val &= bank_mask;
> - reg_val[bank] = (reg_val[bank] & ~bank_mask) | bank_val;
> - }
> + for_each_set_clump8(offset, bank_mask, mask, gc->ngpio) {
> + bank = offset / 8;
> + reg_val[bank] &= ~bank_mask;
> + reg_val[bank] |= bitmap_get_value8(bits, offset) & bank_mask;
> }
>
> pca953x_write_regs(chip, chip->regs->output, reg_val);
> --
> 2.23.0
>
--
With Best Regards,
Andy Shevchenko
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next prev parent reply other threads:[~2019-10-10 13:17 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-09 17:14 [PATCH v18 00/14] Introduce the for_each_set_clump8 macro William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 01/14] bitops: " William Breathitt Gray
2019-10-09 21:18 ` Andrew Morton
2019-10-10 13:18 ` Andy Shevchenko
2019-10-09 17:14 ` [PATCH v18 02/14] lib/test_bitmap.c: Add for_each_set_clump8 test cases William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 03/14] gpio: 104-dio-48e: Utilize for_each_set_clump8 macro William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 04/14] gpio: 104-idi-48: " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 05/14] gpio: gpio-mm: " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 06/14] gpio: ws16c48: " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 07/14] gpio: pci-idio-16: " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 08/14] gpio: pcie-idio-24: " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 09/14] gpio: uniphier: " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 10/14] gpio: 74x164: Utilize the " William Breathitt Gray
2019-10-10 13:16 ` Andy Shevchenko
2019-10-09 17:14 ` [PATCH v18 11/14] thermal: intel: intel_soc_dts_iosf: Utilize " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 12/14] gpio: pisosr: Utilize the " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 13/14] gpio: max3191x: " William Breathitt Gray
2019-10-09 17:14 ` [PATCH v18 14/14] gpio: pca953x: " William Breathitt Gray
2019-10-10 13:16 ` Andy Shevchenko [this message]
2019-10-09 17:38 ` [PATCH v18 00/14] Introduce " Andy Shevchenko
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