target/linux/lantiq/patches-3.2/0014-MIPS-lantiq-fix-pull-gpio-up-resistors-usage.patch

   1 From e97f45d255f4a223d38e2f39c1ddf7a3e0766527 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 14/70] MIPS: lantiq: fix pull gpio up resistors usage
   5
   6 The register that enables a gpios internal pullups was not used. This patch
   7 makes sure the pullups are activated correctly.
   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 diff --git a/arch/mips/lantiq/xway/gpio.c b/arch/mips/lantiq/xway/gpio.c
  16 index f204f6c..14ff7c7 100644
  17 --- a/arch/mips/lantiq/xway/gpio.c
  18 +++ b/arch/mips/lantiq/xway/gpio.c
  19 @@ -21,6 +21,8 @@
  20  #define LTQ_GPIO_ALTSEL0       0x0C
  21  #define LTQ_GPIO_ALTSEL1       0x10
  22  #define LTQ_GPIO_OD            0x14
  23 +#define LTQ_GPIO_PUDSEL                0x1C
  24 +#define LTQ_GPIO_PUDEN         0x20
  25
  26  #define PINS_PER_PORT          16
  27  #define MAX_PORTS              3
  28 @@ -106,6 +108,8 @@ static int ltq_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
  29
  30         ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
  31         ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
  32 +       ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset);
  33 +       ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset);
  34
  35         return 0;
  36  }
  37 @@ -117,6 +121,8 @@ static int ltq_gpio_direction_output(struct gpio_chip *chip,
  38
  39         ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_OD, offset);
  40         ltq_gpio_setbit(ltq_gpio->membase, LTQ_GPIO_DIR, offset);
  41 +       ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDSEL, offset);
  42 +       ltq_gpio_clearbit(ltq_gpio->membase, LTQ_GPIO_PUDEN, offset);
  43         ltq_gpio_set(chip, offset, value);
  44
  45         return 0;
  46 --
  47 1.7.7.1
  48