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From patchwork Wed Jun 28 21:53:23 2017
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Subject: [v2] rpmsg: Make modalias work for DeviceTree based devices
From: Bjorn Andersson <bjorn.andersson@linaro.org>
X-Patchwork-Id: 9815555
Message-Id: <20170628215323.5658-1-bjorn.andersson@linaro.org>
To: Ohad Ben-Cohen <ohad@wizery.com>,
Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org,
Rob Clark <robdclark@gmail.com>
Date: Wed, 28 Jun 2017 14:53:23 -0700
When rpmsg devices are expected to be matched based on their compatible
the modalias should reflect this, so that module autoloading has a
chance to match and load the appropriate module.
Tested-by: Rob Clark <robdclark@gmail.com>
Reported-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
Changes since v1:
- Also update rpmsg_uevent()
drivers/rpmsg/rpmsg_core.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index ad3d2a9df287..067650c5bcb6 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -343,6 +343,11 @@ static ssize_t modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ ssize_t len;
+
+ len = of_device_modalias(dev, buf, PAGE_SIZE);
+ if (len != -ENODEV)
+ return len;
return sprintf(buf, RPMSG_DEVICE_MODALIAS_FMT "\n", rpdev->id.name);
}
@@ -387,6 +392,11 @@ static int rpmsg_dev_match(struct device *dev, struct device_driver *drv)
static int rpmsg_uevent(struct device *dev, struct kobj_uevent_env *env)
{
struct rpmsg_device *rpdev = to_rpmsg_device(dev);
+ int ret;
+
+ ret = of_device_uevent_modalias(dev, env);
+ if (ret != -ENODEV)
+ return ret;
return add_uevent_var(env, "MODALIAS=" RPMSG_DEVICE_MODALIAS_FMT,
rpdev->id.name);
diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c
index 2b9b0941d9eb..6d23226e5f69 100644
--- a/drivers/spmi/spmi.c
+++ b/drivers/spmi/spmi.c
@@ -365,11 +365,23 @@ static int spmi_drv_remove(struct device *dev)
return 0;
}
+static int spmi_drv_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ int ret;
+
+ ret = of_device_uevent_modalias(dev, env);
+ if (ret != -ENODEV)
+ return ret;
+
+ return 0;
+}
+
static struct bus_type spmi_bus_type = {
.name = "spmi",
.match = spmi_device_match,
.probe = spmi_drv_probe,
.remove = spmi_drv_remove,
+ .uevent = spmi_drv_uevent,
};
/**
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