target/linux/lantiq/patches/0025-MIPS-lantiq-activate-pull-up-resistors-when-gpio-is-.patch

   1 From 6efd9a5f303c4561eee14ae429b8c0fafa6c5a83 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Thu, 27 Oct 2011 20:06:30 +0200
   4 Subject: [PATCH 11/22] MIPS: lantiq: activate pull up resistors when gpio is
   5  a input
   6
   7 The register that enables a gpios internal pullups was not set.
   8
   9 Signed-off-by: Matti Laakso <malaakso@elisanet.fi>
  10 Signed-off-by: John Crispin <blogic@openwrt.org>
  11 ---
  12  arch/mips/lantiq/xway/gpio.c |    6 ++++++
  13  1 files changed, 6 insertions(+), 0 deletions(-)
  14
  15 --- a/arch/mips/lantiq/xway/gpio.c
  16 +++ b/arch/mips/lantiq/xway/gpio.c
  17 @@ -21,6 +21,8 @@
  18  #define LTQ_GPIO_ALTSEL0       0x0C
  19  #define LTQ_GPIO_ALTSEL1       0x10
  20  #define LTQ_GPIO_OD            0x14
  21 +#define LTQ_GPIO_PUDSEL                0x1C
  22 +#define LTQ_GPIO_PUDEN         0x20
  23
  24  #define PINS_PER_PORT          16
  25  #define MAX_PORTS              3
  26 @@ -106,6 +108,8 @@ static int ltq_gpio_direction_input(stru
  27
  28         ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
  29         ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
  30 +       ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset);
  31 +       ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset);
  32
  33         return 0;
  34  }
  35 @@ -117,6 +121,8 @@ static int ltq_gpio_direction_output(str
  36
  37         ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
  38         ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
  39 +       ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset);
  40 +       ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset);
  41         ltq_gpio_set(chip, offset, value);
  42
  43         return 0;