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gpio: brcmstb: Do not use gc->pin2mask() 

The pin2mask() accessor only shuffles BIT ORDER in big endian systems,
i.e. the bitstuffing is swizzled big endian so "bit 0" is bit 7 or
bit 15 or bit 31 or so.

The brcmstb only uses big endian BYTE ORDER which will be taken car of
by the ->write_reg() callback.

Just use BIT(offset) to assign the bit.

Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2017-10-20 15:45:34 +02:00
parent 5c7b0c4e7d
commit d74423687f
1 changed files with 3 additions and 3 deletions
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6
drivers/gpio/gpio-brcmstb.c
View File

@ -20,6 +20,7 @@
#include <linux/irqchip/chained_irq.h>
#include <linux/interrupt.h>
#include <linux/reboot.h>
#include <linux/bitops.h>
#define GIO_BANK_SIZE 0x20
#define GIO_ODEN(bank) (((bank) * GIO_BANK_SIZE) + 0x00)
@ -68,16 +69,15 @@ static void brcmstb_gpio_set_imask(struct brcmstb_gpio_bank *bank,
{
struct gpio_chip *gc = &bank->gc;
struct brcmstb_gpio_priv *priv = bank->parent_priv;
u32 mask = gc->pin2mask(gc, offset);
u32 imask;
unsigned long flags;
spin_lock_irqsave(&gc->bgpio_lock, flags);
imask = gc->read_reg(priv->reg_base + GIO_MASK(bank->id));
if (enable)
imask |= mask;
imask |= BIT(offset);
else
imask &= ~mask;
imask &= ~BIT(offset);
gc->write_reg(priv->reg_base + GIO_MASK(bank->id), imask);
spin_unlock_irqrestore(&gc->bgpio_lock, flags);
}