recipes-kernel/linux/linux-am335x-3.2.0-psp04.06.00.08/0001-am335x-enable-pullup-on-the-WLAN-enable-pin-fo.patch

   1 From f69ffbef6793b7238a8518481735fd53326e0cdf Mon Sep 17 00:00:00 2001
   2 From: Vita Preskovsky <vitap@ti.com>
   3 Date: Tue, 24 Jul 2012 20:02:28 +0300
   4 Subject: [PATCH] am335x: enable pullup on the WLAN enable pin for keeping wlan
   5
   6   * Enable pullup on the WLAN enable pin for keeping wlan active
   7     during suspend in wowlan mode. The fix is relevant only in the case
   8     of am335x-SK board.
   9
  10
  11 Signed-off-by: Vita Preskovsky <vitap@ti.com>
  12 ---
  13  arch/arm/mach-omap2/board-am335xevm.c |   22 ++++++++++++++++++++++
  14  1 files changed, 22 insertions(+), 0 deletions(-)
  15
  16 diff --git a/arch/arm/mach-omap2/board-am335xevm.c b/arch/arm/mach-omap2/board-am335xevm.c
  17 index f68710c..f263f84 100644
  18 --- a/arch/arm/mach-omap2/board-am335xevm.c
  19 +++ b/arch/arm/mach-omap2/board-am335xevm.c
  20 @@ -1673,13 +1673,35 @@ static void wl12xx_bluetooth_enable(void)
  21         gpio_direction_output(am335xevm_wlan_data.bt_enable_gpio, 0);
  22  }
  23
  24 +#define AM33XX_CTRL_REGADDR(reg)                                       \
  25 +               AM33XX_L4_WK_IO_ADDRESS(AM33XX_SCM_BASE + (reg))
  26 +
  27 +/* wlan enable pin */
  28 +#define AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET                0x087C
  29  static int wl12xx_set_power(struct device *dev, int slot, int on, int vdd)
  30  {
  31 +       int pad_mux_value;
  32 +
  33         if (on) {
  34                 gpio_direction_output(am335xevm_wlan_data.wlan_enable_gpio, 1);
  35 +
  36 +               /* Enable pullup on the WLAN enable pin for keeping wlan active during suspend
  37 +                  in wowlan mode */
  38 +               if ( am335x_evm_get_id() == EVM_SK ) {
  39 +                       pad_mux_value = readl(AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
  40 +                       pad_mux_value &= (~AM33XX_PULL_DISA);
  41 +                       writel(pad_mux_value, AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
  42 +               }
  43 +
  44                 mdelay(70);
  45         } else {
  46                 gpio_direction_output(am335xevm_wlan_data.wlan_enable_gpio, 0);
  47 +               /* Disable pullup on the WLAN enable when WLAN is off */
  48 +               if ( am335x_evm_get_id() == EVM_SK ) {
  49 +                       pad_mux_value = readl(AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
  50 +                       pad_mux_value |= AM33XX_PULL_DISA;
  51 +                       writel(pad_mux_value, AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
  52 +               }
  53         }
  54
  55         return 0;
  56 --
  57 1.7.0.4