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From f69ffbef6793b7238a8518481735fd53326e0cdf Mon Sep 17 00:00:00 2001
From: Vita Preskovsky <vitap@ti.com>
Date: Tue, 24 Jul 2012 20:02:28 +0300
Subject: [PATCH] am335x: enable pullup on the WLAN enable pin for keeping wlan
* Enable pullup on the WLAN enable pin for keeping wlan active
during suspend in wowlan mode. The fix is relevant only in the case
of am335x-SK board.
Signed-off-by: Vita Preskovsky <vitap@ti.com>
---
arch/arm/mach-omap2/board-am335xevm.c | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/board-am335xevm.c b/arch/arm/mach-omap2/board-am335xevm.c
index f68710c..f263f84 100644
--- a/arch/arm/mach-omap2/board-am335xevm.c
+++ b/arch/arm/mach-omap2/board-am335xevm.c
@@ -1673,13 +1673,35 @@ static void wl12xx_bluetooth_enable(void)
gpio_direction_output(am335xevm_wlan_data.bt_enable_gpio, 0);
}
+#define AM33XX_CTRL_REGADDR(reg) \
+ AM33XX_L4_WK_IO_ADDRESS(AM33XX_SCM_BASE + (reg))
+
+/* wlan enable pin */
+#define AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET 0x087C
static int wl12xx_set_power(struct device *dev, int slot, int on, int vdd)
{
+ int pad_mux_value;
+
if (on) {
gpio_direction_output(am335xevm_wlan_data.wlan_enable_gpio, 1);
+
+ /* Enable pullup on the WLAN enable pin for keeping wlan active during suspend
+ in wowlan mode */
+ if ( am335x_evm_get_id() == EVM_SK ) {
+ pad_mux_value = readl(AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
+ pad_mux_value &= (~AM33XX_PULL_DISA);
+ writel(pad_mux_value, AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
+ }
+
mdelay(70);
} else {
gpio_direction_output(am335xevm_wlan_data.wlan_enable_gpio, 0);
+ /* Disable pullup on the WLAN enable when WLAN is off */
+ if ( am335x_evm_get_id() == EVM_SK ) {
+ pad_mux_value = readl(AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
+ pad_mux_value |= AM33XX_PULL_DISA;
+ writel(pad_mux_value, AM33XX_CTRL_REGADDR(AM33XX_CONTROL_PADCONF_GPMC_CSN0_OFFSET));
+ }
}
return 0;
--
1.7.0.4
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