mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-20 09:31:09 +00:00
9c92ab6191
Based on 1 normalized pattern(s): this software is licensed under the terms of the gnu general public license version 2 as published by the free software foundation and may be copied distributed and modified under those terms this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 285 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Remote processor messaging - sample client driver
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments, Inc.
|
|
* Copyright (C) 2011 Google, Inc.
|
|
*
|
|
* Ohad Ben-Cohen <ohad@wizery.com>
|
|
* Brian Swetland <swetland@google.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/rpmsg.h>
|
|
|
|
#define MSG "hello world!"
|
|
#define MSG_LIMIT 100
|
|
|
|
struct instance_data {
|
|
int rx_count;
|
|
};
|
|
|
|
static int rpmsg_sample_cb(struct rpmsg_device *rpdev, void *data, int len,
|
|
void *priv, u32 src)
|
|
{
|
|
int ret;
|
|
struct instance_data *idata = dev_get_drvdata(&rpdev->dev);
|
|
|
|
dev_info(&rpdev->dev, "incoming msg %d (src: 0x%x)\n",
|
|
++idata->rx_count, src);
|
|
|
|
print_hex_dump(KERN_DEBUG, __func__, DUMP_PREFIX_NONE, 16, 1,
|
|
data, len, true);
|
|
|
|
/* samples should not live forever */
|
|
if (idata->rx_count >= MSG_LIMIT) {
|
|
dev_info(&rpdev->dev, "goodbye!\n");
|
|
return 0;
|
|
}
|
|
|
|
/* send a new message now */
|
|
ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG));
|
|
if (ret)
|
|
dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rpmsg_sample_probe(struct rpmsg_device *rpdev)
|
|
{
|
|
int ret;
|
|
struct instance_data *idata;
|
|
|
|
dev_info(&rpdev->dev, "new channel: 0x%x -> 0x%x!\n",
|
|
rpdev->src, rpdev->dst);
|
|
|
|
idata = devm_kzalloc(&rpdev->dev, sizeof(*idata), GFP_KERNEL);
|
|
if (!idata)
|
|
return -ENOMEM;
|
|
|
|
dev_set_drvdata(&rpdev->dev, idata);
|
|
|
|
/* send a message to our remote processor */
|
|
ret = rpmsg_send(rpdev->ept, MSG, strlen(MSG));
|
|
if (ret) {
|
|
dev_err(&rpdev->dev, "rpmsg_send failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rpmsg_sample_remove(struct rpmsg_device *rpdev)
|
|
{
|
|
dev_info(&rpdev->dev, "rpmsg sample client driver is removed\n");
|
|
}
|
|
|
|
static struct rpmsg_device_id rpmsg_driver_sample_id_table[] = {
|
|
{ .name = "rpmsg-client-sample" },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(rpmsg, rpmsg_driver_sample_id_table);
|
|
|
|
static struct rpmsg_driver rpmsg_sample_client = {
|
|
.drv.name = KBUILD_MODNAME,
|
|
.id_table = rpmsg_driver_sample_id_table,
|
|
.probe = rpmsg_sample_probe,
|
|
.callback = rpmsg_sample_cb,
|
|
.remove = rpmsg_sample_remove,
|
|
};
|
|
module_rpmsg_driver(rpmsg_sample_client);
|
|
|
|
MODULE_DESCRIPTION("Remote processor messaging sample client driver");
|
|
MODULE_LICENSE("GPL v2");
|