diff options
Diffstat (limited to 'arch/arm/mach-tegra/board-harmony.c')
| -rw-r--r-- | arch/arm/mach-tegra/board-harmony.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/board-harmony.c b/arch/arm/mach-tegra/board-harmony.c index d9e398e9fdf7..e861bfeef132 100644 --- a/arch/arm/mach-tegra/board-harmony.c +++ b/arch/arm/mach-tegra/board-harmony.c @@ -27,6 +27,7 @@ #include <linux/i2c-tegra.h> #include <linux/io.h> #include <linux/delay.h> +#include <linux/gpio.h> #include <linux/platform_data/tegra_usb.h> #include <asm/mach-types.h> @@ -377,6 +378,41 @@ static __initdata struct tegra_clk_init_table harmony_clk_init_table[] = { { NULL, NULL, 0, 0}, }; +static int __init harmony_wifi_init(void) +{ + int gpio_pwr, gpio_rst; + + if (!machine_is_harmony()) + return 0; + + /* WLAN - Power up (low) and Reset (low) */ + gpio_pwr = gpio_request(TEGRA_GPIO_WLAN_PWR_LOW, "wlan_pwr"); + gpio_rst = gpio_request(TEGRA_GPIO_WLAN_RST_LOW, "wlan_rst"); + if (gpio_pwr < 0 || gpio_rst < 0) + pr_warning("Unable to get gpio for WLAN Power and Reset\n"); + else { + + tegra_gpio_enable(TEGRA_GPIO_WLAN_PWR_LOW); + tegra_gpio_enable(TEGRA_GPIO_WLAN_RST_LOW); + /* toggle in this order as per spec */ + gpio_direction_output(TEGRA_GPIO_WLAN_PWR_LOW, 0); + gpio_direction_output(TEGRA_GPIO_WLAN_RST_LOW, 0); + udelay(5); + gpio_direction_output(TEGRA_GPIO_WLAN_PWR_LOW, 1); + gpio_direction_output(TEGRA_GPIO_WLAN_RST_LOW, 1); + } + + return 0; +} + +/* + * subsys_initcall_sync is good synch point to call harmony_wifi_init + * This makes sure that the required regulators (LDO3 + * supply of external PMU and 1.2V regulator) are properly enabled, + * and mmc driver has not yet probed for a device on SDIO bus. + */ +subsys_initcall_sync(harmony_wifi_init); + static void __init tegra_harmony_init(void) { tegra_common_init(); |