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gpio: loongson1: fix bgpio usage

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When no flags are given, the native endianness is used to access
the MMIO registers, and the pin2mask() call can simply be
converted to a BIT() call, as per the default pin2mask()
implementation in gpio-mmio.c.

Cc: Kelvin Cheung <keguang.zhang@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2017-10-20 14:42:01 +02:00
parent d97a1b5688
commit fe29416b5c
1 changed files with 3 additions and 4 deletions
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7
drivers/gpio/gpio-loongson1.c
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@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/gpio/driver.h>
#include <linux/platform_device.h>
#include <linux/bitops.h>
/* Loongson 1 GPIO Register Definitions */
#define GPIO_CFG 0x0
@ -22,11 +23,10 @@ static void __iomem *gpio_reg_base;
static int ls1x_gpio_request(struct gpio_chip *gc, unsigned int offset)
{
unsigned long pinmask = gc->pin2mask(gc, offset);
unsigned long flags;
spin_lock_irqsave(&gc->bgpio_lock, flags);
__raw_writel(__raw_readl(gpio_reg_base + GPIO_CFG) | pinmask,
__raw_writel(__raw_readl(gpio_reg_base + GPIO_CFG) | BIT(offset),
gpio_reg_base + GPIO_CFG);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
@ -35,11 +35,10 @@ static int ls1x_gpio_request(struct gpio_chip *gc, unsigned int offset)
static void ls1x_gpio_free(struct gpio_chip *gc, unsigned int offset)
{
unsigned long pinmask = gc->pin2mask(gc, offset);
unsigned long flags;
spin_lock_irqsave(&gc->bgpio_lock, flags);
__raw_writel(__raw_readl(gpio_reg_base + GPIO_CFG) & ~pinmask,
__raw_writel(__raw_readl(gpio_reg_base + GPIO_CFG) & ~BIT(offset),
gpio_reg_base + GPIO_CFG);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}