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.g...@gmail.com> > Cc: Robert Richter <rrich...@marvell.com> > Cc: Bartosz Golaszewski <bgolaszew...@baylibre.com> > Signed-off-by: Syed Nayyar Waris <syednwa...@gmail.com>
Acked-by: William Breathitt Gray <vilhelm.g...@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
>
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