diff options
Diffstat (limited to 'drivers/usb/phy/of.c')
| -rw-r--r-- | drivers/usb/phy/of.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/usb/phy/of.c b/drivers/usb/phy/of.c new file mode 100644 index 00000000000..7ea0154da9d --- /dev/null +++ b/drivers/usb/phy/of.c @@ -0,0 +1,47 @@ +/* + * USB of helper code + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/usb/of.h> +#include <linux/usb/otg.h> + +static const char *const usbphy_modes[] = { + [USBPHY_INTERFACE_MODE_UNKNOWN] = "", + [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_usb_get_phy_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_UNKNOWN; + + for (i = 0; i < ARRAY_SIZE(usbphy_modes); i++) + if (!strcmp(phy_type, usbphy_modes[i])) + return i; + + return USBPHY_INTERFACE_MODE_UNKNOWN; +} +EXPORT_SYMBOL_GPL(of_usb_get_phy_mode); |