linux-kernel - [PATCH 1/7] slimbus: core: add support to uevent

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Message-Id: <20180916234546.29661-2-srinivas.kandagatla@linaro.org>
Date:   Sun, 16 Sep 2018 16:45:40 -0700
From:   srinivas.kandagatla@...aro.org
To:     gregkh@...uxfoundation.org
Cc:     broonie@...nel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        vkoul@...nel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 1/7] slimbus: core: add support to uevent

From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

This patch adds support to uevent to help automatic module loading.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/slimbus/core.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/slimbus/core.c b/drivers/slimbus/core.c
index 95b00d2..31f2910 100644
--- a/drivers/slimbus/core.c
+++ b/drivers/slimbus/core.c
@@ -9,6 +9,7 @@
 #include <linux/init.h>
 #include <linux/idr.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/slimbus.h>
 #include "slimbus.h"
@@ -57,11 +58,24 @@ static int slim_device_remove(struct device *dev)
 	return 0;
 }
 
+static int slim_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct slim_device *sbdev = to_slim_device(dev);
+	int ret;
+
+	ret = of_device_uevent_modalias(dev, env);
+	if (ret != -ENODEV)
+		return ret;
+
+	return add_uevent_var(env, "MODALIAS=slim:%s", dev_name(&sbdev->dev));
+}
+
 struct bus_type slimbus_bus = {
 	.name		= "slimbus",
 	.match		= slim_device_match,
 	.probe		= slim_device_probe,
 	.remove		= slim_device_remove,
+	.uevent		= slim_device_uevent,
 };
 EXPORT_SYMBOL_GPL(slimbus_bus);
 
-- 
2.9.3