diff options
Diffstat (limited to 'drivers/gpio/gpio-generic.c')
| -rw-r--r-- | drivers/gpio/gpio-generic.c | 62 |
1 files changed, 48 insertions, 14 deletions
diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c index 05fcc0f247c..d2196bf7384 100644 --- a/drivers/gpio/gpio-generic.c +++ b/drivers/gpio/gpio-generic.c @@ -104,6 +104,26 @@ static unsigned long bgpio_read64(void __iomem *reg) } #endif /* BITS_PER_LONG >= 64 */ +static void bgpio_write16be(void __iomem *reg, unsigned long data) +{ + iowrite16be(data, reg); +} + +static unsigned long bgpio_read16be(void __iomem *reg) +{ + return ioread16be(reg); +} + +static void bgpio_write32be(void __iomem *reg, unsigned long data) +{ + iowrite32be(data, reg); +} + +static unsigned long bgpio_read32be(void __iomem *reg) +{ + return ioread32be(reg); +} + static unsigned long bgpio_pin2mask(struct bgpio_chip *bgc, unsigned int pin) { return 1 << pin; @@ -249,7 +269,8 @@ static int bgpio_dir_out_inv(struct gpio_chip *gc, unsigned int gpio, int val) static int bgpio_setup_accessors(struct device *dev, struct bgpio_chip *bgc, - bool be) + bool bit_be, + bool byte_be) { switch (bgc->bits) { @@ -258,17 +279,33 @@ static int bgpio_setup_accessors(struct device *dev, bgc->write_reg = bgpio_write8; break; case 16: - bgc->read_reg = bgpio_read16; - bgc->write_reg = bgpio_write16; + if (byte_be) { + bgc->read_reg = bgpio_read16be; + bgc->write_reg = bgpio_write16be; + } else { + bgc->read_reg = bgpio_read16; + bgc->write_reg = bgpio_write16; + } break; case 32: - bgc->read_reg = bgpio_read32; - bgc->write_reg = bgpio_write32; + if (byte_be) { + bgc->read_reg = bgpio_read32be; + bgc->write_reg = bgpio_write32be; + } else { + bgc->read_reg = bgpio_read32; + bgc->write_reg = bgpio_write32; + } break; #if BITS_PER_LONG >= 64 case 64: - bgc->read_reg = bgpio_read64; - bgc->write_reg = bgpio_write64; + if (byte_be) { + dev_err(dev, + "64 bit big endian byte order unsupported\n"); + return -EINVAL; + } else { + bgc->read_reg = bgpio_read64; + bgc->write_reg = bgpio_write64; + } break; #endif /* BITS_PER_LONG >= 64 */ default: @@ -276,7 +313,7 @@ static int bgpio_setup_accessors(struct device *dev, return -EINVAL; } - bgc->pin2mask = be ? bgpio_pin2mask_be : bgpio_pin2mask; + bgc->pin2mask = bit_be ? bgpio_pin2mask_be : bgpio_pin2mask; return 0; } @@ -353,11 +390,7 @@ static int bgpio_setup_direction(struct bgpio_chip *bgc, int bgpio_remove(struct bgpio_chip *bgc) { - int err = gpiochip_remove(&bgc->gc); - - kfree(bgc); - - return err; + return gpiochip_remove(&bgc->gc); } EXPORT_SYMBOL_GPL(bgpio_remove); @@ -385,7 +418,8 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev, if (ret) return ret; - ret = bgpio_setup_accessors(dev, bgc, flags & BGPIOF_BIG_ENDIAN); + ret = bgpio_setup_accessors(dev, bgc, flags & BGPIOF_BIG_ENDIAN, + flags & BGPIOF_BIG_ENDIAN_BYTE_ORDER); if (ret) return ret; |