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authorDongjin Kim <tobetter@gmail.com>2013-05-22 00:20:09 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-05-30 16:32:52 +0400
commite8b58b49130f40c29bb95cd5d9b36955ff703822 (patch)
tree9eff3e37324b5b76dd0aefb992d71fb193a77abb /drivers/usb
parente8e44a4896a5f0bde1af36a31b7ec662bdaa44ef (diff)
downloadlinux-e8b58b49130f40c29bb95cd5d9b36955ff703822.tar.xz
usb: misc: usb3503: Adding device tree entry 'disabled-ports'
This patch is to add a property 'disabled-ports' representing the unused port of USB3503. USB3503 can support up to 3 USB host port and each ports can be controlled to be enabled or disabled. Do not describe this property if all ports must be enabled. You can represent the ports to disable in the device tree. usb3503@08{ ... disabled-ports = <2 3>; ... }; Signed-off-by: Dongjin Kim <tobetter@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/misc/usb3503.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index ab24bb345979..1908ec65c55b 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -186,6 +186,8 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
struct usb3503 *hub;
int err = -ENOMEM;
u32 mode = USB3503_MODE_UNKNOWN;
+ const u32 *property;
+ int len;
hub = kzalloc(sizeof(struct usb3503), GFP_KERNEL);
if (!hub) {
@@ -203,6 +205,18 @@ static int usb3503_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
hub->gpio_reset = pdata->gpio_reset;
hub->mode = pdata->initial_mode;
} else if (np) {
+ hub->port_off_mask = 0;
+
+ property = of_get_property(np, "disabled-ports", &len);
+ if (property && (len / sizeof(u32)) > 0) {
+ int i;
+ for (i = 0; i < len / sizeof(u32); i++) {
+ u32 port = be32_to_cpu(property[i]);
+ if ((1 <= port) && (port <= 3))
+ hub->port_off_mask |= (1 << port);
+ }
+ }
+
hub->gpio_intn = of_get_named_gpio(np, "connect-gpios", 0);
if (hub->gpio_intn == -EPROBE_DEFER)
return -EPROBE_DEFER;