From: Michael Grzeschik <[email protected]> This adds two little devicetree helper functions for determining the dr_mode (host, peripheral, otg) and phy_type (utmi, ulpi,...) from the devicetree.
Signed-off-by: Michael Grzeschik <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]> --- The properties and their values have been taken from the fsl-mph-dr driver. This binding is also documented (though currently not used) for the tegra ehci driver (Documentation/devicetree/bindings/usb/nvidia,tegra20-ehci.txt). This is a first attempt to parse these bindings at a common place so that others can make use of it. Basically I want to know whether this binding is recommended for new drivers since normally the devicetree uses '-' instead of '_', and maybe there are other problems with it. I need this binding for the chipidea driver. I suspect that the fsl-mph-dr driver also really handles a chipidea core. Should we agree on this I would convert the fsl-mph-dr driver to use these helpers. Sascha drivers/usb/core/Makefile | 1 + drivers/usb/core/of.c | 76 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/usb/of.h | 22 +++++++++++++ include/linux/usb/phy.h | 9 ++++++ 4 files changed, 108 insertions(+) create mode 100644 drivers/usb/core/of.c create mode 100644 include/linux/usb/of.h diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile index 26059b9..5378add 100644 --- a/drivers/usb/core/Makefile +++ b/drivers/usb/core/Makefile @@ -10,5 +10,6 @@ usbcore-y += devio.o notify.o generic.o quirks.o devices.o usbcore-$(CONFIG_PCI) += hcd-pci.o usbcore-$(CONFIG_ACPI) += usb-acpi.o +usbcore-$(CONFIG_OF) += of.o obj-$(CONFIG_USB) += usbcore.o diff --git a/drivers/usb/core/of.c b/drivers/usb/core/of.c new file mode 100644 index 0000000..d000d9f --- /dev/null +++ b/drivers/usb/core/of.c @@ -0,0 +1,76 @@ +/* + * OF helpers for usb devices. + * + * This file is released under the GPLv2 + * + * Initially copied out of drivers/of/of_net.c + */ +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/usb/of.h> +#include <linux/usb/phy.h> +#include <linux/export.h> + +static const char *usbphy_modes[] = { + [USBPHY_INTERFACE_MODE_NA] = "", + [USBPHY_INTERFACE_MODE_UTMI] = "utmi", + [USBPHY_INTERFACE_MODE_UTMIW] = "utmi_wide", + [USBPHY_INTERFACE_MODE_ULPI] = "ulpi", + [USBPHY_INTERFACE_MODE_SERIAL] = "serial", + [USBPHY_INTERFACE_MODE_HSIC] = "hsic", +}; + +/** + * of_get_usbphy_mode - Get phy mode for given device_node + * @np: Pointer to the given device_node + * + * The function gets phy interface string from property 'phy_type', + * and returns the correspondig enum usb_phy_interface + */ +enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np) +{ + const char *phy_type; + int err, i; + + err = of_property_read_string(np, "phy_type", &phy_type); + if (err < 0) + return USBPHY_INTERFACE_MODE_NA; + + for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++) + if (!strcasecmp(phy_type, usbphy_modes[i])) + return i; + + return USBPHY_INTERFACE_MODE_NA; +} +EXPORT_SYMBOL_GPL(of_usb_get_phy_mode); + +static const char *usb_dr_modes[] = { + [USB_DR_MODE_UNKNOWN] = "", + [USB_DR_MODE_HOST] = "host", + [USB_DR_MODE_PERIPHERAL] = "peripheral", + [USB_DR_MODE_OTG] = "otg", +}; + +/** + * of_usb_get_dr_mode - Get dual role mode for given device_node + * @np: Pointer to the given device_node + * + * The function gets phy interface string from property 'dr_mode', + * and returns the correspondig enum usb_phy_dr_mode + */ +enum usb_phy_dr_mode of_usb_get_dr_mode(struct device_node *np) +{ + const char *dr_mode; + int err, i; + + err = of_property_read_string(np, "dr_mode", &dr_mode); + if (err < 0) + return USB_DR_MODE_UNKNOWN; + + for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++) + if (!strcasecmp(dr_mode, usb_dr_modes[i])) + return i; + + return USB_DR_MODE_UNKNOWN; +} +EXPORT_SYMBOL_GPL(of_usb_get_dr_mode); diff --git a/include/linux/usb/of.h b/include/linux/usb/of.h new file mode 100644 index 0000000..582ba96 --- /dev/null +++ b/include/linux/usb/of.h @@ -0,0 +1,22 @@ +/* + * OF helpers for usb devices. + * + * This file is released under the GPLv2 + */ + +#ifndef __LINUX_USB_OF_H +#define __LINUX_USB_OF_H + +#include <linux/usb/phy.h> + +enum usb_phy_dr_mode { + USB_DR_MODE_UNKNOWN, + USB_DR_MODE_HOST, + USB_DR_MODE_PERIPHERAL, + USB_DR_MODE_OTG, +}; + +enum usb_phy_interface of_usb_get_phy_mode(struct device_node *np); +enum usb_phy_dr_mode of_usb_get_dr_mode(struct device_node *np); + +#endif /* __LINUX_USB_OF_H */ diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h index a29ae1e..c5154cf 100644 --- a/include/linux/usb/phy.h +++ b/include/linux/usb/phy.h @@ -12,6 +12,15 @@ #include <linux/notifier.h> #include <linux/usb.h> +enum usb_phy_interface { + USBPHY_INTERFACE_MODE_NA, + USBPHY_INTERFACE_MODE_UTMI, + USBPHY_INTERFACE_MODE_UTMIW, + USBPHY_INTERFACE_MODE_ULPI, + USBPHY_INTERFACE_MODE_SERIAL, + USBPHY_INTERFACE_MODE_HSIC, +}; + enum usb_phy_events { USB_EVENT_NONE, /* no events or cable disconnected */ USB_EVENT_VBUS, /* vbus valid event */ -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
