diff options
| author | Bitan Biswas <bbiswas@nvidia.com> | 2012-07-27 16:09:39 +0530 |
|---|---|---|
| committer | Lokesh Pathak <lpathak@nvidia.com> | 2012-07-31 08:35:01 -0700 |
| commit | 1339ef85328052f13af1fcb6d16134949591c480 (patch) | |
| tree | ad7bb965f6edc7058673f23a423e361ddd6bd96c /arch/arm/mach-tegra/board-cardhu-sdhci.c | |
| parent | 3c9339606b835e21b9835724f5f19e1e473076b6 (diff) | |
ARM: tegra: wifi dpd control for reset
Wifi On/Off needs to toggle GPIO pins under SDMMC that could be
in IO DPD mode.
bug 1021526
Change-Id: If514059372d2242c6f6512b30534536cbff455dd
Signed-off-by: Bitan Biswas <bbiswas@nvidia.com>
Reviewed-on: http://git-master/r/118940
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Tested-by: Pavan Kunapuli <pkunapuli@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/board-cardhu-sdhci.c')
| -rw-r--r-- | arch/arm/mach-tegra/board-cardhu-sdhci.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/board-cardhu-sdhci.c b/arch/arm/mach-tegra/board-cardhu-sdhci.c index d8be9fe6747f..df7177fb34a7 100644 --- a/arch/arm/mach-tegra/board-cardhu-sdhci.c +++ b/arch/arm/mach-tegra/board-cardhu-sdhci.c @@ -28,6 +28,7 @@ #include <mach/irqs.h> #include <mach/iomap.h> #include <mach/sdhci.h> +#include <mach/io_dpd.h> #include "gpio-names.h" #include "board.h" @@ -251,11 +252,31 @@ static int cardhu_wifi_set_carddetect(int val) static int cardhu_wifi_power(int on) { + struct tegra_io_dpd *sd_dpd; + pr_debug("%s: %d\n", __func__, on); + + /* + * FIXME : we need to revisit IO DPD code + * on how should multiple pins under DPD get controlled + * + * cardhu GPIO WLAN enable is part of SDMMC3 pin group + */ + sd_dpd = tegra_io_dpd_get(&tegra_sdhci_device2.dev); + if (sd_dpd) { + mutex_lock(&sd_dpd->delay_lock); + tegra_io_dpd_disable(sd_dpd); + mutex_unlock(&sd_dpd->delay_lock); + } gpio_set_value(CARDHU_WLAN_PWR, on); mdelay(100); gpio_set_value(CARDHU_WLAN_RST, on); mdelay(200); + if (sd_dpd) { + mutex_lock(&sd_dpd->delay_lock); + tegra_io_dpd_enable(sd_dpd); + mutex_unlock(&sd_dpd->delay_lock); + } return 0; } |