Messages in this thread Patch in this message | | | Date | Sun, 26 Apr 2020 00:36:24 +0530 | From | Syed Nayyar Waris <> | Subject | [PATCH v2 5/6] gpio: thunderx: Utilize for_each_set_clump macro |
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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: Robert Richter <rrichter@marvell.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Syed Nayyar Waris <syednwaris@gmail.com> Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com> --- Changes in v2: - No change.
drivers/gpio/gpio-thunderx.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/gpio/gpio-thunderx.c b/drivers/gpio/gpio-thunderx.c index 9f66dea..74aea25 100644 --- a/drivers/gpio/gpio-thunderx.c +++ b/drivers/gpio/gpio-thunderx.c @@ -275,12 +275,16 @@ static void thunderx_gpio_set_multiple(struct gpio_chip *chip, unsigned long *bits) { int bank; - u64 set_bits, clear_bits; + u64 set_bits, clear_bits, gpio_mask; + const unsigned long bank_size = 64; + 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, bank_size) { + bank = offset / bank_size; + 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); } -- 2.7.4
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