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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Oct 09, 2019 at 01:14:46PM -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 > Suggested-by: Andy Shevchenko > Cc: Geert Uytterhoeven > Cc: Phil Reid > Signed-off-by: William Breathitt Gray > --- > 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 > */ > > +#include > #include > #include > #include > @@ -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 > -- With Best Regards, Andy Shevchenko _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel