diff options
| author | Stephen Warren <swarren@nvidia.com> | 2012-04-12 15:46:49 -0600 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2012-04-25 15:22:09 -0600 |
| commit | aa607ebf93a5fc26275a575781399df971dd1b91 (patch) | |
| tree | 93dcb6f1af5f6d7e64663a4ce9e45e889866309e /arch/arm/mach-tegra | |
| parent | 60d148b9f838b718e4808061ee6d5833de77fd9c (diff) | |
| download | op-kernel-dev-aa607ebf93a5fc26275a575781399df971dd1b91.zip op-kernel-dev-aa607ebf93a5fc26275a575781399df971dd1b91.tar.gz | |
ARM: tegra: add USB ULPI PHY reset GPIO to device tree
ULPI PHYs have a reset signal, and different boards use a different GPIO
for this task. Add a property to device tree to represent this.
I'm not sure if adding this property to the EHCI controller node is
entirely correct; perhaps eventually we should have explicit separate
nodes for the various PHYs. However, we don't have that right now, so this
binding seems like a reasonable choice.
Cc: <devicetree-discuss@lists.ozlabs.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: <linux-usb@vger.kernel.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/include/mach/usb_phy.h | 4 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/usb_phy.c | 15 |
2 files changed, 15 insertions, 4 deletions
diff --git a/arch/arm/mach-tegra/include/mach/usb_phy.h b/arch/arm/mach-tegra/include/mach/usb_phy.h index de1a0f6..935ce9f 100644 --- a/arch/arm/mach-tegra/include/mach/usb_phy.h +++ b/arch/arm/mach-tegra/include/mach/usb_phy.h @@ -61,8 +61,8 @@ struct tegra_usb_phy { struct usb_phy *ulpi; }; -struct tegra_usb_phy *tegra_usb_phy_open(int instance, void __iomem *regs, - void *config, enum tegra_usb_phy_mode phy_mode); +struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance, + void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode); int tegra_usb_phy_power_on(struct tegra_usb_phy *phy); diff --git a/arch/arm/mach-tegra/usb_phy.c b/arch/arm/mach-tegra/usb_phy.c index d71d2fe..54e353c 100644 --- a/arch/arm/mach-tegra/usb_phy.c +++ b/arch/arm/mach-tegra/usb_phy.c @@ -26,6 +26,7 @@ #include <linux/platform_device.h> #include <linux/io.h> #include <linux/gpio.h> +#include <linux/of_gpio.h> #include <linux/usb/otg.h> #include <linux/usb/ulpi.h> #include <asm/mach-types.h> @@ -654,8 +655,8 @@ static void ulpi_phy_power_off(struct tegra_usb_phy *phy) clk_disable(phy->clk); } -struct tegra_usb_phy *tegra_usb_phy_open(int instance, void __iomem *regs, - void *config, enum tegra_usb_phy_mode phy_mode) +struct tegra_usb_phy *tegra_usb_phy_open(struct device *dev, int instance, + void __iomem *regs, void *config, enum tegra_usb_phy_mode phy_mode) { struct tegra_usb_phy *phy; struct tegra_ulpi_config *ulpi_config; @@ -711,6 +712,16 @@ struct tegra_usb_phy *tegra_usb_phy_open(int instance, void __iomem *regs, err = -ENXIO; goto err1; } + if (!gpio_is_valid(ulpi_config->reset_gpio)) + ulpi_config->reset_gpio = + of_get_named_gpio(dev->of_node, + "nvidia,phy-reset-gpio", 0); + if (!gpio_is_valid(ulpi_config->reset_gpio)) { + pr_err("%s: invalid reset gpio: %d\n", __func__, + ulpi_config->reset_gpio); + err = -EINVAL; + goto err1; + } gpio_request(ulpi_config->reset_gpio, "ulpi_phy_reset_b"); gpio_direction_output(ulpi_config->reset_gpio, 0); phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0); |
