From: William Breathitt Gray <vilhelm.gray@gmail.com>
To: linus.walleij@linaro.org, bgolaszewski@baylibre.com
Cc: akpm@linux-foundation.org, linux-gpio@vger.kernel.org,
linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk,
yamada.masahiro@socionext.com,
linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org,
geert@linux-m68k.org, preid@electromag.com.au,
William Breathitt Gray <vilhelm.gray@gmail.com>
Subject: [PATCH v13 04/11] gpio: 104-idi-48: Utilize for_each_set_clump8 macro
Date: Wed, 27 Mar 2019 13:59:50 +0900 [thread overview]
Message-ID: <1476995eb0bf988b4a3cc27f0e5e1484933d93ec.1553661964.git.vilhelm.gray@gmail.com> (raw)
In-Reply-To: <cover.1553661964.git.vilhelm.gray@gmail.com>
Replace verbose implementation in get_multiple/set_multiple callbacks
with for_each_set_clump8 macro to simplify code and improve clarity.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
drivers/gpio/gpio-104-idi-48.c | 36 +++++++---------------------------
1 file changed, 7 insertions(+), 29 deletions(-)
diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
index 88dc6f2449f6..9b43964b0412 100644
--- a/drivers/gpio/gpio-104-idi-48.c
+++ b/drivers/gpio/gpio-104-idi-48.c
@@ -93,42 +93,20 @@ static int idi_48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
unsigned long *bits)
{
struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
- size_t i;
+ unsigned long offset;
+ unsigned long gpio_mask;
static const size_t ports[] = { 0, 1, 2, 4, 5, 6 };
- const unsigned int gpio_reg_size = 8;
- unsigned int bits_offset;
- size_t word_index;
- unsigned int word_offset;
- unsigned long word_mask;
- const unsigned long port_mask = GENMASK(gpio_reg_size - 1, 0);
+ unsigned int port_addr;
unsigned long port_state;
/* clear bits array to a clean slate */
bitmap_zero(bits, chip->ngpio);
- /* get bits are evaluated a gpio port register at a time */
- for (i = 0; i < ARRAY_SIZE(ports); i++) {
- /* gpio offset in bits array */
- bits_offset = i * gpio_reg_size;
+ for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
+ port_addr = idi48gpio->base + ports[offset / 8];
+ port_state = inb(port_addr) & gpio_mask;
- /* word index for bits array */
- word_index = BIT_WORD(bits_offset);
-
- /* gpio offset within current word of bits array */
- word_offset = bits_offset % BITS_PER_LONG;
-
- /* mask of get bits for current gpio within current word */
- word_mask = mask[word_index] & (port_mask << word_offset);
- if (!word_mask) {
- /* no get bits in this port so skip to next one */
- continue;
- }
-
- /* read bits from current gpio port */
- port_state = inb(idi48gpio->base + ports[i]);
-
- /* store acquired bits at respective bits array offset */
- bits[word_index] |= (port_state << word_offset) & word_mask;
+ bitmap_set_value8(bits, port_state, offset);
}
return 0;
--
2.21.0
next prev parent reply other threads:[~2019-03-27 4:58 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-27 4:57 [PATCH v13 00/11] Introduce the for_each_set_clump8 macro William Breathitt Gray
2019-03-27 4:58 ` [PATCH v13 01/11] bitops: " William Breathitt Gray
2019-03-27 6:42 ` Lukas Wunner
2019-03-28 4:30 ` William Breathitt Gray
2019-03-28 7:30 ` Lukas Wunner
2019-03-27 12:30 ` Andy Shevchenko
2019-03-27 4:59 ` [PATCH v13 02/11] lib/test_bitmap.c: Add for_each_set_clump8 test cases William Breathitt Gray
2019-03-27 4:59 ` [PATCH v13 03/11] gpio: 104-dio-48e: Utilize for_each_set_clump8 macro William Breathitt Gray
2019-03-27 4:59 ` William Breathitt Gray [this message]
2019-03-27 5:00 ` [PATCH v13 05/11] gpio: gpio-mm: " William Breathitt Gray
2019-03-27 5:00 ` [PATCH v13 06/11] gpio: ws16c48: " William Breathitt Gray
2019-03-27 5:00 ` [PATCH v13 07/11] gpio: pci-idio-16: " William Breathitt Gray
2019-03-27 5:01 ` [PATCH v13 08/11] gpio: pcie-idio-24: " William Breathitt Gray
2019-03-27 5:02 ` [PATCH v13 09/11] gpio: uniphier: " William Breathitt Gray
2019-03-27 5:02 ` [PATCH v13 10/11] gpio: 74x164: Utilize the " William Breathitt Gray
2019-03-27 12:33 ` Andy Shevchenko
2019-03-28 4:40 ` William Breathitt Gray
2019-03-28 9:11 ` Andy Shevchenko
2019-03-27 5:02 ` [PATCH v13 11/11] thermal: intel: intel_soc_dts_iosf: Utilize " William Breathitt Gray
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