From 6efd9a5f303c4561eee14ae429b8c0fafa6c5a83 Mon Sep 17 00:00:00 2001 From: John Crispin Date: Thu, 27 Oct 2011 20:06:30 +0200 Subject: [PATCH 11/22] MIPS: lantiq: activate pull up resistors when gpio is a input The register that enables a gpios internal pullups was not set. Signed-off-by: Matti Laakso Signed-off-by: John Crispin --- arch/mips/lantiq/xway/gpio.c | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) --- a/arch/mips/lantiq/xway/gpio.c +++ b/arch/mips/lantiq/xway/gpio.c @@ -21,6 +21,8 @@ #define LTQ_GPIO_ALTSEL0 0x0C #define LTQ_GPIO_ALTSEL1 0x10 #define LTQ_GPIO_OD 0x14 +#define LTQ_GPIO_PUDSEL 0x1C +#define LTQ_GPIO_PUDEN 0x20 #define PINS_PER_PORT 16 #define MAX_PORTS 3 @@ -106,6 +108,8 @@ static int ltq_gpio_direction_input(stru ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset); + ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset); + ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset); return 0; } @@ -117,6 +121,8 @@ static int ltq_gpio_direction_output(str ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset); ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset); + ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset); + ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset); ltq_gpio_set(chip, offset, value); return 0;