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| author | Florian Fainelli <f.fainelli@gmail.com> | 2016-01-06 10:55:22 -0800 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-01-07 16:25:09 +0100 |
| commit | ce5a7e81390b9ae28f8dc82505afa96c1787d312 (patch) | |
| tree | 8c18c00d5eb62a37ccc474d4c8eb72ada410ad54 /drivers/gpio | |
| parent | 780c43dd61a09ce7d9cdb1e7c33d3341ec471ff0 (diff) | |
| download | op-kernel-dev-ce5a7e81390b9ae28f8dc82505afa96c1787d312.zip op-kernel-dev-ce5a7e81390b9ae28f8dc82505afa96c1787d312.tar.gz | |
gpio: brcmstb: Set endian flags for big-endian MIPS
Broadcom MIPS-based STB chips endianness is configured by boot strap,
which also reverses all bus endianness (i.e., big-endian CPU + big
endian bus ==> native endian I/O).
Other architectures (e.g., ARM) either do not support big endian, or
else leave I/O in little endian mode.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-brcmstb.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-brcmstb.c b/drivers/gpio/gpio-brcmstb.c index dc3f039..d764425 100644 --- a/drivers/gpio/gpio-brcmstb.c +++ b/drivers/gpio/gpio-brcmstb.c @@ -409,6 +409,7 @@ static int brcmstb_gpio_probe(struct platform_device *pdev) int num_banks = 0; int err; static int gpio_base; + unsigned long flags = 0; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) @@ -438,6 +439,18 @@ static int brcmstb_gpio_probe(struct platform_device *pdev) if (brcmstb_gpio_sanity_check_banks(dev, np, res)) return -EINVAL; + /* + * MIPS endianness is configured by boot strap, which also reverses all + * bus endianness (i.e., big-endian CPU + big endian bus ==> native + * endian I/O). + * + * Other architectures (e.g., ARM) either do not support big endian, or + * else leave I/O in little endian mode. + */ +#if defined(CONFIG_MIPS) && defined(__BIG_ENDIAN) + flags = BGPIOF_BIG_ENDIAN_BYTE_ORDER; +#endif + of_property_for_each_u32(np, "brcm,gpio-bank-widths", prop, p, bank_width) { struct brcmstb_gpio_bank *bank; @@ -466,7 +479,7 @@ static int brcmstb_gpio_probe(struct platform_device *pdev) err = bgpio_init(gc, dev, 4, reg_base + GIO_DATA(bank->id), NULL, NULL, NULL, - reg_base + GIO_IODIR(bank->id), 0); + reg_base + GIO_IODIR(bank->id), flags); if (err) { dev_err(dev, "bgpio_init() failed\n"); goto fail; |
