From mboxrd@z Thu Jan 1 00:00:00 1970 From: William Breathitt Gray Subject: [PATCH v12 11/11] gpio: 74x164: Utilize the for_each_set_clump8 macro Date: Mon, 25 Mar 2019 15:26:18 +0900 Message-ID: References: Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org To: linus.walleij@linaro.org, bgolaszewski@baylibre.com Cc: akpm@linux-foundation.org, linux-gpio@vger.kernel.org, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, yamada.masahiro@socionext.com, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, geert@linux-m68k.org, preid@electromag.com.au, William Breathitt Gray , Geert Uytterhoeven List-Id: linux-gpio@vger.kernel.org Replace verbose implementation in set_multiple callback with for_each_set_clump8 macro to simplify code and improve clarity. Suggested-by: Andy Shevchenko Cc: Geert Uytterhoeven Cc: Phil Reid Signed-off-by: William Breathitt Gray --- drivers/gpio/gpio-74x164.c | 20 ++++++++++---------- 1 file changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c index fb7b620763a2..e43a6de3b6eb 100644 --- a/drivers/gpio/gpio-74x164.c +++ b/drivers/gpio/gpio-74x164.c @@ -9,6 +9,7 @@ * published by the Free Software Foundation. */ +#include #include #include #include @@ -75,20 +76,19 @@ 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 int offset; + unsigned long bankmask; + const unsigned int ngpio = chip->registers * 8; + size_t bank; + unsigned int 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, ngpio) { + bank = (chip->registers - 1) - (offset / 8); + bitmask = bitmap_get_value8(bits, ngpio, 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); -- 2.21.0