From: William Breathitt Gray <vilhelm.gray@gmail.com>
To: linus.walleij@linaro.org, bgolaszewski@baylibre.com,
akpm@linux-foundation.org
Cc: linux-arch@vger.kernel.org, preid@electromag.com.au,
Geert Uytterhoeven <geert+renesas@glider.be>,
yamada.masahiro@socionext.com, linux-pm@vger.kernel.org,
linux@rasmusvillemoes.dk, linux-kernel@vger.kernel.org,
William Breathitt Gray <vilhelm.gray@gmail.com>,
linux-gpio@vger.kernel.org, lukas@wunner.de,
geert@linux-m68k.org, andriy.shevchenko@linux.intel.com,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v18 10/14] gpio: 74x164: Utilize the for_each_set_clump8 macro
Date: Wed, 9 Oct 2019 13:14:46 -0400 [thread overview]
Message-ID: <7ea2df7182a50a1136ca36edc46dffcb2446fd27.1570641097.git.vilhelm.gray@gmail.com> (raw)
In-Reply-To: <cover.1570641097.git.vilhelm.gray@gmail.com>
Replace verbose implementation in set_multiple callback with
for_each_set_clump8 macro to simplify code and improve clarity.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Phil Reid <preid@electromag.com.au>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
drivers/gpio/gpio-74x164.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index e81307f9754e..05637d585152 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -6,6 +6,7 @@
* Copyright (C) 2010 Miguel Gaio <miguel.gaio@efixo.com>
*/
+#include <linux/bitops.h>
#include <linux/gpio/consumer.h>
#include <linux/gpio/driver.h>
#include <linux/module.h>
@@ -72,20 +73,18 @@ static void gen_74x164_set_multiple(struct gpio_chip *gc, unsigned long *mask,
unsigned long *bits)
{
struct gen_74x164_chip *chip = gpiochip_get_data(gc);
- unsigned int i, idx, shift;
- u8 bank, bankmask;
+ unsigned long offset;
+ unsigned long bankmask;
+ size_t bank;
+ unsigned long bitmask;
mutex_lock(&chip->lock);
- for (i = 0, bank = chip->registers - 1; i < chip->registers;
- i++, bank--) {
- idx = i / sizeof(*mask);
- shift = i % sizeof(*mask) * BITS_PER_BYTE;
- bankmask = mask[idx] >> shift;
- if (!bankmask)
- continue;
+ for_each_set_clump8(offset, bankmask, mask, chip->registers * 8) {
+ bank = chip->registers - 1 - offset / 8;
+ bitmask = bitmap_get_value8(bits, offset) & bankmask;
chip->buffer[bank] &= ~bankmask;
- chip->buffer[bank] |= bankmask & (bits[idx] >> shift);
+ chip->buffer[bank] |= bitmask;
}
__gen_74x164_write_config(chip);
mutex_unlock(&chip->lock);
--
2.23.0
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next prev parent reply other threads:[~2019-10-09 17:18 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 ` William Breathitt Gray [this message]
2019-10-10 13:16 ` [PATCH v18 10/14] gpio: 74x164: Utilize the " 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
2019-10-09 17:38 ` [PATCH v18 00/14] Introduce " Andy Shevchenko
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