| Message ID | 3fc5bd83322c94eb2a4f48677f6d762bf81d0652.1613134924.git.syednwaris@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce the for_each_set_clump macro | expand |
On Fri, Feb 12, 2021 at 06:51:04PM +0530, Syed Nayyar Waris wrote: > This patch reimplements the thunderx_gpio_set_multiple function in > drivers/gpio/gpio-thunderx.c to use the new for_each_set_clump macro. > Instead of looping for each bank in thunderx_gpio_set_multiple > function, now we can skip bank which is not set and save cycles. > > Cc: William Breathitt Gray <vilhelm.gray@gmail.com> > Cc: Robert Richter <rrichter@marvell.com> > Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> > Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com> Acked-by: William Breathitt Gray <vilhelm.gray@gmail.com> > --- > drivers/gpio/gpio-thunderx.c | 13 ++++++++----- > 1 file changed, 8 insertions(+), 5 deletions(-) > > diff --git a/drivers/gpio/gpio-thunderx.c b/drivers/gpio/gpio-thunderx.c > index 9f66deab46ea..0398b2d2af4b 100644 > --- a/drivers/gpio/gpio-thunderx.c > +++ b/drivers/gpio/gpio-thunderx.c > @@ -16,7 +16,7 @@ > #include <linux/pci.h> > #include <linux/spinlock.h> > #include <asm-generic/msi.h> > - > +#include "gpiolib.h" > > #define GPIO_RX_DAT 0x0 > #define GPIO_TX_SET 0x8 > @@ -275,12 +275,15 @@ static void thunderx_gpio_set_multiple(struct gpio_chip *chip, > unsigned long *bits) > { > int bank; > - u64 set_bits, clear_bits; > + unsigned long set_bits, clear_bits, gpio_mask; > + unsigned long offset; > + > struct thunderx_gpio *txgpio = gpiochip_get_data(chip); > > - for (bank = 0; bank <= chip->ngpio / 64; bank++) { > - set_bits = bits[bank] & mask[bank]; > - clear_bits = ~bits[bank] & mask[bank]; > + for_each_set_clump(offset, gpio_mask, mask, chip->ngpio, 64) { > + bank = offset / 64; > + set_bits = bits[bank] & gpio_mask; > + clear_bits = ~bits[bank] & gpio_mask; > writeq(set_bits, txgpio->register_base + (bank * GPIO_2ND_BANK) + GPIO_TX_SET); > writeq(clear_bits, txgpio->register_base + (bank * GPIO_2ND_BANK) + GPIO_TX_CLR); > } > -- > 2.29.0 >
diff --git a/drivers/gpio/gpio-thunderx.c b/drivers/gpio/gpio-thunderx.c index 9f66deab46ea..0398b2d2af4b 100644 --- a/drivers/gpio/gpio-thunderx.c +++ b/drivers/gpio/gpio-thunderx.c @@ -16,7 +16,7 @@ #include <linux/pci.h> #include <linux/spinlock.h> #include <asm-generic/msi.h> - +#include "gpiolib.h" #define GPIO_RX_DAT 0x0 #define GPIO_TX_SET 0x8 @@ -275,12 +275,15 @@ static void thunderx_gpio_set_multiple(struct gpio_chip *chip, unsigned long *bits) { int bank; - u64 set_bits, clear_bits; + unsigned long set_bits, clear_bits, gpio_mask; + unsigned long offset; + struct thunderx_gpio *txgpio = gpiochip_get_data(chip); - for (bank = 0; bank <= chip->ngpio / 64; bank++) { - set_bits = bits[bank] & mask[bank]; - clear_bits = ~bits[bank] & mask[bank]; + for_each_set_clump(offset, gpio_mask, mask, chip->ngpio, 64) { + bank = offset / 64; + set_bits = bits[bank] & gpio_mask; + clear_bits = ~bits[bank] & gpio_mask; writeq(set_bits, txgpio->register_base + (bank * GPIO_2ND_BANK) + GPIO_TX_SET); writeq(clear_bits, txgpio->register_base + (bank * GPIO_2ND_BANK) + GPIO_TX_CLR); }
This patch reimplements the thunderx_gpio_set_multiple function in drivers/gpio/gpio-thunderx.c to use the new for_each_set_clump macro. Instead of looping for each bank in thunderx_gpio_set_multiple function, now we can skip bank which is not set and save cycles. Cc: William Breathitt Gray <vilhelm.gray@gmail.com> Cc: Robert Richter <rrichter@marvell.com> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com> --- drivers/gpio/gpio-thunderx.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)