gpio: uniphier: utilize for_each_set_clump8 macro

Replace verbose implementation in set_multiple callback with
for_each_set_clump8 macro to simplify code and improve clarity. An
improvement in this case is that banks that are not masked will now be
skipped.

Link: http://lkml.kernel.org/r/5b24[e-mail]
Signed-off-by: William Breathitt Gray <[e-mail]>
Cc: Andy Shevchenko <[e-mail]>
Cc: Masahiro Yamada <[e-mail]>
Cc: Arnd Bergmann <[e-mail]>
Cc: Bartosz Golaszewski <[e-mail]>
Cc: Geert Uytterhoeven <[e-mail]>
Cc: Geert Uytterhoeven <[e-mail]>
Cc: Linus Walleij <[e-mail]>
Cc: Lukas Wunner <[e-mail]>
Cc: Mathias Duckeck <[e-mail]>
Cc: Morten Hein Tiljeset <[e-mail]>
Cc: Phil Reid <[e-mail]>
Cc: Rasmus Villemoes <[e-mail]>
Cc: Sean Nyekjaer <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/gpio/gpio-uniphier.c

···
 #include <linux/spinlock.h>
 #include <dt-bindings/gpio/uniphier-gpio.h>
 
-#define UNIPHIER_GPIO_BANK_MASK		\
-				GENMASK((UNIPHIER_GPIO_LINES_PER_BANK) - 1, 0)
-
 #define UNIPHIER_GPIO_IRQ_MAX_NUM	24
 
 #define UNIPHIER_GPIO_PORT_DATA		0x0	/* data */
···
 static void uniphier_gpio_set_multiple(struct gpio_chip *chip,
 				       unsigned long *mask, unsigned long *bits)
 {
-	unsigned int bank, shift, bank_mask, bank_bits;
-	int i;
+	unsigned long i, bank, bank_mask, bank_bits;
 
-	for (i = 0; i < chip->ngpio; i += UNIPHIER_GPIO_LINES_PER_BANK) {
+	for_each_set_clump8(i, bank_mask, mask, chip->ngpio) {
 		bank = i / UNIPHIER_GPIO_LINES_PER_BANK;
-		shift = i % BITS_PER_LONG;
-		bank_mask = (mask[BIT_WORD(i)] >> shift) &
-						UNIPHIER_GPIO_BANK_MASK;
-		bank_bits = bits[BIT_WORD(i)] >> shift;
+		bank_bits = bitmap_get_value8(bits, i);
 
 		uniphier_gpio_bank_write(chip, bank, UNIPHIER_GPIO_PORT_DATA,
 					 bank_mask, bank_bits);