diff options
| author | Venu Byravarasu <vbyravarasu@nvidia.com> | 2012-07-24 18:12:22 +0530 |
|---|---|---|
| committer | Lokesh Pathak <lpathak@nvidia.com> | 2012-07-30 08:41:48 -0700 |
| commit | 6d24e4887d377c0318514aea091cf6e3b5e7cf53 (patch) | |
| tree | 23306ed0a210feaa370cc38169ddceacd96296f6 /arch/arm/mach-tegra/tegra3_usb_phy.c | |
| parent | 935adef53692ab73a02a7d09876756b30beb5206 (diff) | |
arm: tegra3: usb_phy: Add support for HSIC wakeup
As part of this patch following changes are made:
1. HSIC regulator enable/disable is added
2. HSIC phy close is added.
bug 1010916
Change-Id: I4607a3ac13417a201b62708c6fef5d1117dfdcc5
Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Reviewed-on: http://git-master/r/116984
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/tegra3_usb_phy.c')
| -rw-r--r-- | arch/arm/mach-tegra/tegra3_usb_phy.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/tegra3_usb_phy.c b/arch/arm/mach-tegra/tegra3_usb_phy.c index 0b8ab076693d..171e2ec91ada 100644 --- a/arch/arm/mach-tegra/tegra3_usb_phy.c +++ b/arch/arm/mach-tegra/tegra3_usb_phy.c @@ -2065,10 +2065,58 @@ static void uhsic_phy_restore_end(struct tegra_usb_phy *phy) } } +static int hsic_rail_enable(struct tegra_usb_phy *phy) +{ + int ret; + + if (phy->hsic_reg == NULL) { + phy->hsic_reg = regulator_get(NULL, "avdd_hsic"); + if (IS_ERR_OR_NULL(phy->hsic_reg)) { + pr_err("HSIC: Could not get regulator avdd_hsic\n"); + phy->hsic_reg = NULL; + return PTR_ERR(phy->hsic_reg); + } + } + + ret = regulator_enable(phy->hsic_reg); + if (ret < 0) { + pr_err("%s avdd_hsic could not be enabled\n", __func__); + return ret; + } + + return 0; +} + +static int hsic_rail_disable(struct tegra_usb_phy *phy) +{ + int ret; + + if (phy->hsic_reg == NULL) { + pr_warn("%s: unbalanced disable\n", __func__); + return -EIO; + } + + ret = regulator_disable(phy->hsic_reg); + if (ret < 0) { + pr_err("HSIC regulator avdd_hsic cannot be disabled\n"); + return ret; + } + + return 0; +} + static int uhsic_phy_open(struct tegra_usb_phy *phy) { unsigned long parent_rate; int i; + int ret; + + phy->hsic_reg = NULL; + ret = hsic_rail_enable(phy); + if (ret < 0) { + pr_err("%s avdd_hsic could not be enabled\n", __func__); + return ret; + } DBG("%s(%d) inst:[%d]\n", __func__, __LINE__, phy->inst); parent_rate = clk_get_rate(clk_get_parent(phy->pllu_clk)); @@ -2088,6 +2136,15 @@ static int uhsic_phy_open(struct tegra_usb_phy *phy) return 0; } +static void uhsic_phy_close(struct tegra_usb_phy *phy) +{ + int ret; + + ret = hsic_rail_disable(phy); + if (ret < 0) + pr_err("%s avdd_hsic could not be disabled\n", __func__); +} + static int uhsic_phy_irq(struct tegra_usb_phy *phy) { usb_phy_fence_read(phy); @@ -2863,6 +2920,7 @@ static struct tegra_usb_phy_ops utmi_phy_ops = { static struct tegra_usb_phy_ops uhsic_phy_ops = { .open = uhsic_phy_open, + .close = uhsic_phy_close, .irq = uhsic_phy_irq, .power_on = uhsic_phy_power_on, .power_off = uhsic_phy_power_off, |