From: William Breathitt Gray <vilhelm.gray@gmail.com>
To: linus.walleij@linaro.org, akpm@linux-foundation.org
Cc: linux-gpio@vger.kernel.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org, andriy.shevchenko@linux.intel.com,
linux@rasmusvillemoes.dk,
William Breathitt Gray <vilhelm.gray@gmail.com>
Subject: [RESEND PATCH v4 4/8] gpio: 104-idi-48: Utilize for_each_set_clump macro
Date: Tue, 2 Oct 2018 10:15:05 +0900 [thread overview]
Message-ID: <0f69499043ff2ea312c358f9042e495cf5c34449.1538441919.git.vilhelm.gray@gmail.com> (raw)
In-Reply-To: <cover.1538441919.git.vilhelm.gray@gmail.com>
Replace verbose implementation in get_multiple/set_multiple callbacks
with for_each_set_clump macro to simplify code and improve clarity.
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
drivers/gpio/gpio-104-idi-48.c | 32 ++++----------------------------
1 file changed, 4 insertions(+), 28 deletions(-)
diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
index 2c9738adb3a6..f8de5560174f 100644
--- a/drivers/gpio/gpio-104-idi-48.c
+++ b/drivers/gpio/gpio-104-idi-48.c
@@ -94,41 +94,17 @@ static int idi_48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
{
struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
size_t i;
+ size_t word;
+ unsigned int offset;
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 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;
-
- /* 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 */
+ for_each_set_clump(i, word, offset, mask, ARRAY_SIZE(ports), 8) {
port_state = inb(idi48gpio->base + ports[i]);
-
- /* store acquired bits at respective bits array offset */
- bits[word_index] |= port_state << word_offset;
+ bits[word] |= port_state << offset;
}
return 0;
--
2.19.0
next prev parent reply other threads:[~2018-10-02 1:15 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-02 1:12 [RESEND PATCH v4 0/8] Introduce the for_each_set_clump macro William Breathitt Gray
2018-10-02 1:12 ` William Breathitt Gray
2018-10-02 1:13 ` [RESEND PATCH v4 1/8] bitops: " William Breathitt Gray
2018-10-02 1:13 ` William Breathitt Gray
2018-10-02 7:42 ` Rasmus Villemoes
2018-10-02 7:42 ` Rasmus Villemoes
2018-10-02 8:21 ` Andy Shevchenko
2018-10-02 8:21 ` Andy Shevchenko
2018-10-03 11:48 ` Andy Shevchenko
2018-10-03 11:48 ` Andy Shevchenko
2018-10-04 10:36 ` William Breathitt Gray
2018-10-04 10:36 ` William Breathitt Gray
2018-10-04 12:10 ` Andy Shevchenko
2018-10-04 12:10 ` Andy Shevchenko
2018-10-04 10:30 ` William Breathitt Gray
2018-10-04 10:30 ` William Breathitt Gray
2018-10-04 10:03 ` William Breathitt Gray
2018-10-04 10:03 ` William Breathitt Gray
2018-10-02 1:14 ` [RESEND PATCH v4 2/8] lib/test_bitmap.c: Add for_each_set_clump test cases William Breathitt Gray
2018-10-02 1:14 ` William Breathitt Gray
2018-10-02 1:14 ` [RESEND PATCH v4 3/8] gpio: 104-dio-48e: Utilize for_each_set_clump macro William Breathitt Gray
2018-10-02 1:14 ` William Breathitt Gray
2018-10-02 7:00 ` Rasmus Villemoes
2018-10-02 7:00 ` Rasmus Villemoes
2018-10-14 4:19 ` William Breathitt Gray
2018-10-14 4:19 ` William Breathitt Gray
2018-10-15 11:59 ` Rasmus Villemoes
2018-10-15 11:59 ` Rasmus Villemoes
2018-10-17 1:54 ` William Breathitt Gray
2018-10-17 1:54 ` William Breathitt Gray
2018-10-02 1:15 ` William Breathitt Gray [this message]
2018-10-02 1:15 ` [RESEND PATCH v4 4/8] gpio: 104-idi-48: " William Breathitt Gray
2018-10-02 1:15 ` [RESEND PATCH v4 5/8] gpio: gpio-mm: " William Breathitt Gray
2018-10-02 1:15 ` William Breathitt Gray
2018-10-02 1:15 ` [RESEND PATCH v4 6/8] gpio: ws16c48: " William Breathitt Gray
2018-10-02 1:15 ` William Breathitt Gray
2018-10-02 1:16 ` [RESEND PATCH v4 7/8] gpio: pci-idio-16: " William Breathitt Gray
2018-10-02 1:16 ` William Breathitt Gray
2018-10-02 1:16 ` [RESEND PATCH v4 8/8] gpio: pcie-idio-24: " William Breathitt Gray
2018-10-02 1:16 ` William Breathitt Gray
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