From d6d50db8a32674e56d4464688b1d74c9edaab550 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 6 Mar 2016 19:28:13 -0700 Subject: [PATCH] x86: gpio: Correct GPIO setup ordering The Intel GPIO driver can set up the GPIO pin mapping when the first GPIO is probed. However, it assumes that the first GPIO to be probed is in the first GPIO bank. If this is not the case then the init will write to the wrong registers. Fix this. Also add a note that this code is deprecated. We should move to using device tree instead. Signed-off-by: Simon Glass Reviewed-by: Bin Meng --- arch/x86/include/asm/gpio.h | 5 +++++ drivers/gpio/intel_ich6_gpio.c | 4 +++- 2 files changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/gpio.h b/arch/x86/include/asm/gpio.h index 403851b792..40f4958052 100644 --- a/arch/x86/include/asm/gpio.h +++ b/arch/x86/include/asm/gpio.h @@ -12,6 +12,7 @@ struct ich6_bank_platdata { uint16_t base_addr; const char *bank_name; + int offset; }; #define GPIO_MODE_NATIVE 0 @@ -146,6 +147,10 @@ struct pch_gpio_map { } set3; }; +/* + * Deprecated functions to set up the GPIO map. The device tree should be used + * instead. + */ int gpio_ich6_pinctrl_init(void); void setup_pch_gpios(u16 gpiobase, const struct pch_gpio_map *gpio); void ich_gpio_set_gpio_map(const struct pch_gpio_map *map); diff --git a/drivers/gpio/intel_ich6_gpio.c b/drivers/gpio/intel_ich6_gpio.c index 527ed6d0fa..c81d0332c4 100644 --- a/drivers/gpio/intel_ich6_gpio.c +++ b/drivers/gpio/intel_ich6_gpio.c @@ -279,6 +279,7 @@ static int gpio_ich6_ofdata_to_platdata(struct udevice *dev) debug("%s: Invalid register offset %d\n", __func__, offset); return -EINVAL; } + plat->offset = offset; plat->base_addr = gpiobase + offset; plat->bank_name = fdt_getprop(gd->fdt_blob, dev->of_offset, "bank-name", NULL); @@ -293,7 +294,8 @@ static int ich6_gpio_probe(struct udevice *dev) struct ich6_bank_priv *bank = dev_get_priv(dev); if (gd->arch.gpio_map) { - setup_pch_gpios(plat->base_addr, gd->arch.gpio_map); + setup_pch_gpios(plat->base_addr - plat->offset, + gd->arch.gpio_map); gd->arch.gpio_map = NULL; } -- 2.30.2