| Message ID | e72393325e58778b7ba59c80c6b79c1f93b81d8d.1570374078.git.vilhelm.gray@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce the for_each_set_clump8 macro | expand |
On Sun, Oct 06, 2019 at 11:11:11AM -0400, William Breathitt Gray wrote: > Replace verbose implementation in set_multiple callback with > for_each_set_clump8 macro to simplify code and improve clarity. I can test this along with 74x164 at the same time. > Cc: Phil Reid <preid@electromag.com.au> > Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> > --- > drivers/gpio/gpio-pca953x.c | 17 +++++++---------- > 1 file changed, 7 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c > index de5d1383f28d..10b669b8f27d 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> > @@ -456,7 +457,8 @@ 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; > @@ -466,15 +468,10 @@ 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); > -- > 2.23.0 >
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index de5d1383f28d..10b669b8f27d 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> @@ -456,7 +457,8 @@ 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; @@ -466,15 +468,10 @@ 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);
Replace verbose implementation in set_multiple callback with for_each_set_clump8 macro to simplify code and improve clarity. Cc: Phil Reid <preid@electromag.com.au> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> --- drivers/gpio/gpio-pca953x.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-)