The patch titled
Subject: gpio: 74x164: utilize the for_each_set_clump8 macro
has been added to the -mm tree. Its filename is
gpio-74x164-utilize-the-for_each_set_clump8-macro.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/gpio-74x164-utilize-the-for_each_set_clump8-macro.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/gpio-74x164-utilize-the-for_each_set_clump8-macro.patch
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------------------------------------------------------
From: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
Subject: gpio: 74x164: utilize the for_each_set_clump8 macro
Replace verbose implementation in set_multiple callback with
for_each_set_clump8 macro to simplify code and improve clarity.
Link: http://lkml.kernel.org/r/7ea2df7182a50a1136ca36edc46dffcb2446fd27.1570641097.git.vilhelm.gray@xxxxxxxxx
Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
Suggested-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Phil Reid <preid@xxxxxxxxxxxxxxxxx>
Cc: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Cc: Lukas Wunner <lukas@xxxxxxxxx>
Cc: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Cc: Mathias Duckeck <m.duckeck@xxxxxxxxx>
Cc: Morten Hein Tiljeset <morten.tiljeset@xxxxxxxxx>
Cc: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
Cc: Sean Nyekjaer <sean.nyekjaer@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/gpio/gpio-74x164.c | 19 +++++++++----------
1 file changed, 9 insertions(+), 10 deletions(-)
--- a/drivers/gpio/gpio-74x164.c~gpio-74x164-utilize-the-for_each_set_clump8-macro
+++ a/drivers/gpio/gpio-74x164.c
@@ -6,6 +6,7 @@
* Copyright (C) 2010 Miguel Gaio <miguel.gaio@xxxxxxxxx>
*/
+#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(stru
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);
_
Patches currently in -mm which might be from vilhelm.gray@xxxxxxxxx are
bitops-introduce-the-for_each_set_clump8-macro.patch
lib-test_bitmapc-add-for_each_set_clump8-test-cases.patch
gpio-104-dio-48e-utilize-for_each_set_clump8-macro.patch
gpio-104-idi-48-utilize-for_each_set_clump8-macro.patch
gpio-gpio-mm-utilize-for_each_set_clump8-macro.patch
gpio-ws16c48-utilize-for_each_set_clump8-macro.patch
gpio-pci-idio-16-utilize-for_each_set_clump8-macro.patch
gpio-pcie-idio-24-utilize-for_each_set_clump8-macro.patch
gpio-uniphier-utilize-for_each_set_clump8-macro.patch
gpio-74x164-utilize-the-for_each_set_clump8-macro.patch
thermal-intel-intel_soc_dts_iosf-utilize-for_each_set_clump8-macro.patch
gpio-pisosr-utilize-the-for_each_set_clump8-macro.patch
gpio-max3191x-utilize-the-for_each_set_clump8-macro.patch
gpio-pca953x-utilize-the-for_each_set_clump8-macro.patch
