From: Marco Felsch <m.felsch@pengutronix.de>
To: richard.leitner@skidata.com, robh+dt@kernel.org, fancer.lancer@gmail.com
Cc: linux-usb@vger.kernel.org, devicetree@vger.kernel.org,
kernel@pengutronix.de
Subject: [PATCH 4/4] usb: usb251xb: add pm_ops
Date: Tue, 17 Sep 2019 16:44:49 +0200 [thread overview]
Message-ID: <20190917144449.32739-5-m.felsch@pengutronix.de> (raw)
In-Reply-To: <20190917144449.32739-1-m.felsch@pengutronix.de>
Currently the driver don't support pm_ops. These ops are not necessary
if the supply isn't switchable (always on). This assumptions seems to be
wrong because no one needs a powered hub during suspend-to-ram/disk.
So adding simple_dev_pm_ops to be able to switch off the hub during
suspend and to restore the config after a resume operation.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
drivers/usb/misc/usb251xb.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
index bc031d33f433..5bba19937da1 100644
--- a/drivers/usb/misc/usb251xb.c
+++ b/drivers/usb/misc/usb251xb.c
@@ -701,6 +701,29 @@ static int usb251xb_i2c_probe(struct i2c_client *i2c,
return usb251xb_probe(hub);
}
+static int __maybe_unused usb251xb_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct usb251xb *hub = i2c_get_clientdata(client);
+
+ return regulator_disable(hub->vdd);
+}
+
+static int __maybe_unused usb251xb_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct usb251xb *hub = i2c_get_clientdata(client);
+ int err;
+
+ err = regulator_enable(hub->vdd);
+ if (err)
+ return err;
+
+ return usb251xb_connect(hub);
+}
+
+static SIMPLE_DEV_PM_OPS(usb251xb_pm_ops, usb251xb_suspend, usb251xb_resume);
+
static const struct i2c_device_id usb251xb_id[] = {
{ "usb2512b", 0 },
{ "usb2512bi", 0 },
@@ -718,6 +741,7 @@ static struct i2c_driver usb251xb_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = of_match_ptr(usb251xb_of_match),
+ .pm = &usb251xb_pm_ops,
},
.probe = usb251xb_i2c_probe,
.id_table = usb251xb_id,
--
2.20.1
next prev parent reply other threads:[~2019-09-17 14:44 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 14:44 [PATCH 0/4] Add simple-pm ops Marco Felsch
2019-09-17 14:44 ` [PATCH 1/4] dt-bindings: usb: usb251xb: add documentation for voltage supply Marco Felsch
2019-09-18 8:13 ` Richard Leitner
2019-09-30 23:07 ` Rob Herring
2019-09-17 14:44 ` [PATCH 2/4] usb: usb251xb: add vdd supply support Marco Felsch
2019-09-18 8:14 ` Richard Leitner
2019-09-17 14:44 ` [PATCH 3/4] usb: usb251xb: simplify reset helper Marco Felsch
2019-09-18 8:14 ` Richard Leitner
2019-09-17 14:44 ` Marco Felsch [this message]
2019-09-18 8:15 ` [PATCH 4/4] usb: usb251xb: add pm_ops Richard Leitner
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