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authorWilliam Breathitt Gray <vilhelm.gray@gmail.com>2019-12-04 16:51:43 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2019-12-04 19:44:13 -0800
commitae81217edc18135d13e5b6c17609ee2c07af4188 (patch)
tree8a1ca383fc0c2af63aaa198cb3ac70e91783f69c /drivers/gpio
parentd077c78b45168bc869b5453bb1250325c5ed10ff (diff)
gpio: pca953x: 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/3543ffc3668ad4ed4c00e8ebaf14a5559fd6ddf2.1570641097.git.vilhelm.gray@gmail.com Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Phil Reid <preid@electromag.com.au> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Lukas Wunner <lukas@wunner.de> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Mathias Duckeck <m.duckeck@kunbus.de> Cc: Morten Hein Tiljeset <morten.tiljeset@prevas.dk> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Sean Nyekjaer <sean.nyekjaer@prevas.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-pca953x.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 82122c3c688a..232e3f987511 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>
@@ -459,7 +460,8 @@ 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;
@@ -469,15 +471,10 @@ 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);