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-rw-r--r--Documentation/devicetree/bindings/usb/usb251xb.txt10
-rw-r--r--drivers/usb/misc/usb251xb.c35
2 files changed, 26 insertions, 19 deletions
diff --git a/Documentation/devicetree/bindings/usb/usb251xb.txt b/Documentation/devicetree/bindings/usb/usb251xb.txt
index a5efd10ace9e..91499ae028db 100644
--- a/Documentation/devicetree/bindings/usb/usb251xb.txt
+++ b/Documentation/devicetree/bindings/usb/usb251xb.txt
@@ -31,7 +31,9 @@ Optional properties :
(default is individual)
- dynamic-power-switching : enable auto-switching from self- to bus-powered
operation if the local power source is removed or unavailable
- - oc-delay-{100us,4ms,8ms,16ms} : set over current timer delay (default is 8ms)
+ - oc-delay-us : Delay time (in microseconds) for filtering the over-current
+ sense inputs. Valid values are 100, 4000, 8000 (default) and 16000. If
+ an invalid value is given, the default is used instead.
- compound-device : indicated the hub is part of a compound device
- port-mapping-mode : enable port mapping mode
- string-support : enable string descriptor support (required for manufacturer,
@@ -40,9 +42,9 @@ Optional properties :
device connected.
- sp-disabled-ports : Specifies the ports which will be self-power disabled
- bp-disabled-ports : Specifies the ports which will be bus-power disabled
- - power-on-time : Specifies the time it takes from the time the host initiates
- the power-on sequence to a port until the port has adequate power. The
- value is given in ms in a 0 - 510 range (default is 100ms).
+ - power-on-time-ms : Specifies the time it takes from the time the host
+ initiates the power-on sequence to a port until the port has adequate
+ power. The value is given in ms in a 0 - 510 range (default is 100ms).
Examples:
usb2512b@2c {
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 3f9c3060c477..91f66d68bcb7 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -375,18 +375,24 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
if (of_get_property(np, "dynamic-power-switching", NULL))
hub->conf_data2 |= BIT(7);
- if (of_get_property(np, "oc-delay-100us", NULL)) {
- hub->conf_data2 &= ~BIT(5);
- hub->conf_data2 &= ~BIT(4);
- } else if (of_get_property(np, "oc-delay-4ms", NULL)) {
- hub->conf_data2 &= ~BIT(5);
- hub->conf_data2 |= BIT(4);
- } else if (of_get_property(np, "oc-delay-8ms", NULL)) {
- hub->conf_data2 |= BIT(5);
- hub->conf_data2 &= ~BIT(4);
- } else if (of_get_property(np, "oc-delay-16ms", NULL)) {
- hub->conf_data2 |= BIT(5);
- hub->conf_data2 |= BIT(4);
+ if (!of_property_read_u32(np, "oc-delay-us", property_u32)) {
+ if (*property_u32 == 100) {
+ /* 100 us*/
+ hub->conf_data2 &= ~BIT(5);
+ hub->conf_data2 &= ~BIT(4);
+ } else if (*property_u32 == 4000) {
+ /* 4 ms */
+ hub->conf_data2 &= ~BIT(5);
+ hub->conf_data2 |= BIT(4);
+ } else if (*property_u32 == 16000) {
+ /* 16 ms */
+ hub->conf_data2 |= BIT(5);
+ hub->conf_data2 |= BIT(4);
+ } else {
+ /* 8 ms (DEFAULT) */
+ hub->conf_data2 |= BIT(5);
+ hub->conf_data2 &= ~BIT(4);
+ }
}
if (of_get_property(np, "compound-device", NULL))
@@ -433,9 +439,8 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
}
hub->power_on_time = USB251XB_DEF_POWER_ON_TIME;
- if (!of_property_read_u32(np, "power-on-time", property_u32))
- hub->power_on_time = min_t(u8, be32_to_cpu(*property_u32) / 2,
- 255);
+ if (!of_property_read_u32(np, "power-on-time-ms", property_u32))
+ hub->power_on_time = min_t(u8, *property_u32 / 2, 255);
if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1))
hub->lang_id = USB251XB_DEF_LANGUAGE_ID;