Met vriendelijke groet / kind regards,
Mike Looijmans
System Expert
TOPIC Embedded Products B.V.
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On 10-06-2020 22:22, Rob Herring wrote:
On Wed, Jun 03, 2020 at 02:09:15PM +0200, Mike Looijmans wrote:
Support VBUS power control using regulator framework. Enables the regulator
while the port is in host mode.
Signed-off-by: Mike Looijmans <mike.looijmans@xxxxxxxx>
---
v2: Add missing devm_regulator_get call which got lost during rebase
.../devicetree/bindings/usb/dwc3.txt | 1 +
drivers/usb/dwc3/core.c | 34 ++++++++++++++-----
drivers/usb/dwc3/core.h | 4 +++
drivers/usb/dwc3/drd.c | 6 ++--
4 files changed, 33 insertions(+), 12 deletions(-)
diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt
index 9946ff9ba735..56bc3f238e2d 100644
--- a/Documentation/devicetree/bindings/usb/dwc3.txt
+++ b/Documentation/devicetree/bindings/usb/dwc3.txt
@@ -37,6 +37,7 @@ Optional properties:
- phys: from the *Generic PHY* bindings
- phy-names: from the *Generic PHY* bindings; supported names are "usb2-phy"
or "usb3-phy".
+ - vbus-supply: Regulator handle that provides the VBUS power.
Does the DWC3 block require Vbus to power itself? Doubtful. This
belongs in a usb-connector node. If the DWC3 driver wants to get the
Vbus supply, it can fetch it from that node.
Rob
Okay, I've been digging into that. But there's no actual driver that
binds to a "usb-b-connector" compatible, so how do we get to the
vbus-supply from there?
[devm_]regulator_get only accepts a device as argument, and will not
look into child nodes. The only way to get at the vbus of a child node
(or a node linked through a port) would be to hand-code the equivalent
of of_regulator_get(), which will not be acceptable.
Or is it the intention that I write a usb-X-connector device driver
first that handles the vbus?
--
Mike Looijmans
