diff options
| author | Seshendra Gadagottu <sgadagottu@nvidia.com> | 2011-02-18 22:28:44 +0530 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2011-02-22 18:12:49 -0800 |
| commit | f7a800483296dc29d846d232b58ba7c694e7baab (patch) | |
| tree | 646b91666ca93fa9b477945e391fbff358193af8 /arch | |
| parent | 9618759e4a002ee3d121cf090545509bfedb6bff (diff) | |
arch: arm: usb_phy: support for HSIC power off
Fixing the hsic re-enumeration issue by adding missing code
in ushic_phy_power_off function.
BUG 790888
Change-Id: I56c280acee2fd6ae6719c6802d14975840ef1d53
Reviewed-on: http://git-master/r/19304
Tested-by: Seshendra Gadagottu <sgadagottu@nvidia.com>
Reviewed-by: Kaushik Sen <ksen@nvidia.com>
Reviewed-by: Hanumanth Venkateswa Moganty <vmoganty@nvidia.com>
Reviewed-by: Shail Dave <sdave@nvidia.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-tegra/usb_phy.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/arm/mach-tegra/usb_phy.c b/arch/arm/mach-tegra/usb_phy.c index bcc5cc464eb6..7318d95e7317 100644 --- a/arch/arm/mach-tegra/usb_phy.c +++ b/arch/arm/mach-tegra/usb_phy.c @@ -933,8 +933,23 @@ static void uhsic_phy_power_on(struct tegra_usb_phy *phy) static void uhsic_phy_power_off(struct tegra_usb_phy *phy) { + unsigned long val; + void __iomem *base = phy->regs; + + val = readl(base + UHSIC_PADS_CFG1); + val &= ~UHSIC_RPU_STROBE; + val |= UHSIC_RPD_STROBE; + writel(val, base + UHSIC_PADS_CFG1); + + val = readl(base + USB_SUSP_CTRL); + val |= UHSIC_RESET; + writel(val, base + USB_SUSP_CTRL); + udelay(30); + + val = readl(base + USB_SUSP_CTRL); + val &= ~UHSIC_PHY_ENABLE; + writel(val, base + USB_SUSP_CTRL); - /* Do not do any thing here */ } struct tegra_usb_phy *tegra_usb_phy_open(int instance, void __iomem *regs, |