diff options
| author | Michael Grzeschik <m.grzeschik@pengutronix.de> | 2013-06-13 17:59:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-06-17 13:47:09 -0700 |
| commit | 1c9af65357a309b60d78a442bd61d27cad458d00 (patch) | |
| tree | 5768aa043e4597b4691fcebe8bc7706487379ce8 /drivers/usb/usb-common.c | |
| parent | 2e270412968d961ecde347343ffa67dfe39f6c95 (diff) | |
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/usb-common.c')
| -rw-r--r-- | drivers/usb/usb-common.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/usb/usb-common.c b/drivers/usb/usb-common.c index 0db0a919d72..675384dabfe 100644 --- a/drivers/usb/usb-common.c +++ b/drivers/usb/usb-common.c @@ -13,7 +13,9 @@ #include <linux/kernel.h> #include <linux/module.h> +#include <linux/of.h> #include <linux/usb/ch9.h> +#include <linux/usb/of.h> #include <linux/usb/otg.h> const char *usb_otg_state_string(enum usb_otg_state state) @@ -79,4 +81,37 @@ const char *usb_state_string(enum usb_device_state state) } EXPORT_SYMBOL_GPL(usb_state_string); +#ifdef CONFIG_OF +static const char *const 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_dr_mode + */ +enum usb_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 (!strcmp(dr_mode, usb_dr_modes[i])) + return i; + + return USB_DR_MODE_UNKNOWN; +} +EXPORT_SYMBOL_GPL(of_usb_get_dr_mode); +#endif + MODULE_LICENSE("GPL"); |