diff options
| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2013-06-13 18:59:55 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-18 00:47:09 +0400 |
| commit | 1c9af65357a309b60d78a442bd61d27cad458d00 (patch) | |
| tree | 5768aa043e4597b4691fcebe8bc7706487379ce8 /drivers/usb/phy/of.c | |
| parent | 2e270412968d961ecde347343ffa67dfe39f6c95 (diff) | |
| download | linux-1c9af65357a309b60d78a442bd61d27cad458d00.tar.xz | |
usb: add devicetree helpers for determining dr_mode and phy_type
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 <m.grzeschik@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 000000000000..7ea0154da9d5 --- /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); |