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Subject[PATCH 3/5] usb: usb251xb: Add max power/current dts nodes
Date
This parameters may be varied in accordance with hardware specifics.
So lets add the corresponding settings to the usb251x driver dts
specification.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>
---
Documentation/devicetree/bindings/usb/usb251xb.txt | 6 ++++++
drivers/usb/misc/usb251xb.c | 20 ++++++++++++++++----
2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/usb251xb.txt b/Documentation/devicetree/bindings/usb/usb251xb.txt
index 3d84626d3..dd59a32e7 100644
--- a/Documentation/devicetree/bindings/usb/usb251xb.txt
+++ b/Documentation/devicetree/bindings/usb/usb251xb.txt
@@ -44,6 +44,12 @@ 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
+ - sp-max-{power,current} : Indicates the power/current consumed by hub from
+ an upstream port (VBUS) when operation as a self-powered hub. The value
+ is given in mA in a 0 - 100 range (default is 1mA).
+ - bp-max-{power,current} : Indicates the power/current consumed by hub from
+ an upstream port (VBUS) when operation as a bus-powered hub. The value
+ is given in mA in a 0 - 510 range (default is 100mA).
- 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).
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index 8101c6212..d6a0ff4ec 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -493,6 +493,22 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
}
}

+ hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
+ if (!of_property_read_u32(np, "sp-max-power", &property_u32))
+ hub->max_power_sp = min_t(u8, property_u32 / 2, 50);
+
+ hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS;
+ if (!of_property_read_u32(np, "bp-max-power", &property_u32))
+ hub->max_power_bp = min_t(u8, property_u32 / 2, 255);
+
+ hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF;
+ if (!of_property_read_u32(np, "sp-max-current", &property_u32))
+ hub->max_current_sp = min_t(u8, property_u32 / 2, 50);
+
+ hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS;
+ if (!of_property_read_u32(np, "bp-max-current", &property_u32))
+ hub->max_current_bp = min_t(u8, property_u32 / 2, 255);
+
hub->power_on_time = USB251XB_DEF_POWER_ON_TIME;
if (!of_property_read_u32(np, "power-on-time-ms", &property_u32))
hub->power_on_time = min_t(u8, property_u32 / 2, 255);
@@ -532,10 +548,6 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
/* The following parameters are currently not exposed to devicetree, but
* may be as soon as needed.
*/
- hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
- hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS;
- hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF;
- hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS;
hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE;
hub->boost_up = USB251XB_DEF_BOOST_UP;
hub->boost_57 = USB251XB_DEF_BOOST_57;
--
2.12.0
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