[PATCH 2/3] usb: usb251xb: dt: add unit suffix to oc-delay and power-on-time

From: Richard Leitner
Date: Tue Feb 21 2017 - 04:06:29 EST


Rename oc-delay-* to oc-delay-us and make it expect a time value.
Furthermore add -ms suffix to power-on-time. These changes were
suggested by Rob Herring in https://lkml.org/lkml/2017/2/15/1283.

Signed-off-by: Richard Leitner <richard.leitner@xxxxxxxxxxx>
---
Documentation/devicetree/bindings/usb/usb251xb.txt | 9 +++---
drivers/usb/misc/usb251xb.c | 32 +++++++++++++---------
2 files changed, 24 insertions(+), 17 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/usb251xb.txt b/Documentation/devicetree/bindings/usb/usb251xb.txt
index a5efd10..4d6bd73 100644
--- a/Documentation/devicetree/bindings/usb/usb251xb.txt
+++ b/Documentation/devicetree/bindings/usb/usb251xb.txt
@@ -31,7 +31,8 @@ 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 : microseconds over current timer delay, valid values are 100,
+ 4000, 8000 (default) and 16000. All other values are rounded up.
- 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 +41,9 @@ 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 3f9c306..58b887a 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 < 8000) {
+ /* 8 ms */
+ hub->conf_data2 |= BIT(5);
+ hub->conf_data2 &= ~BIT(4);
+ } else {
+ /* 16 ms */
+ hub->conf_data2 |= BIT(5);
+ hub->conf_data2 |= BIT(4);
+ }
}

if (of_get_property(np, "compound-device", NULL))
@@ -433,7 +439,7 @@ 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))
+ if (!of_property_read_u32(np, "power-on-time-ms", property_u32))
hub->power_on_time = min_t(u8, be32_to_cpu(*property_u32) / 2,
255);

--
2.1.4