linux-kernel - [PATCH v1 3/5] gpio: xilinx: Switch to use new bitmap

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Date:   Tue, 26 Sep 2023 08:20:05 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
        Yury Norov <yury.norov@...il.com>, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Shubhrajyoti Datta <shubhrajyoti.datta@....com>,
        Srinivas Neeli <srinivas.neeli@....com>,
        Michal Simek <michal.simek@....com>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Andy Shevchenko <andy@...nel.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Marek Behún <kabel@...nel.org>
Subject: [PATCH v1 3/5] gpio: xilinx: Switch to use new bitmap_scatter() helper

bitmaps_scatter() produces a sparse bitmap based on the dense one
and a given mask. In this driver the given mask is hw_map, while
sw_map is of sequential bits. We may use the bitmap_scatter() helper
instead of bitmap_remap(), because it's optimized for our case.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpio-xilinx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index a16945e8319e..f103c30cc74f 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -208,8 +208,8 @@ static void xgpio_set_multiple(struct gpio_chip *gc, unsigned long *mask,
 	unsigned long flags;
 	struct xgpio_instance *chip = gpiochip_get_data(gc);
 
-	bitmap_remap(hw_mask, mask, chip->sw_map, chip->hw_map, 64);
-	bitmap_remap(hw_bits, bits, chip->sw_map, chip->hw_map, 64);
+	bitmap_scatter(hw_mask, mask, chip->hw_map, 64);
+	bitmap_scatter(hw_bits, bits, chip->hw_map, 64);
 
 	spin_lock_irqsave(&chip->gpio_lock, flags);
 
-- 
2.40.0.1.gaa8946217a0b