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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>
This commit is contained in:
Florian Fainelli 2016-01-06 10:55:22 -08:00 committed by Linus Walleij
parent 780c43dd61
commit ce5a7e8139
1 changed files with 14 additions and 1 deletions
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15
drivers/gpio/gpio-brcmstb.c
View File

@ -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;