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// SPDX-License-Identifier: GPL-2.0
/*
* RPM over SMD communication wrapper for interconects
*
* Copyright (C) 2018 Linaro Ltd
* Author: Georgi Djakov <georgi.djakov@linaro.org>
*/
#include <linux/interconnect-provider.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/soc/qcom/smd-rpm.h>
#include "smd-rpm.h"
#define RPM_KEY_BW 0x00007762
static struct qcom_icc_rpm {
struct qcom_smd_rpm *rpm;
} icc_rpm_smd;
struct icc_rpm_smd_req {
__le32 key;
__le32 nbytes;
__le32 value;
};
bool qcom_icc_rpm_smd_available(void)
{
if (!icc_rpm_smd.rpm)
return false;
return true;
}
int qcom_icc_rpm_smd_send(int ctx, int rsc_type, int id, u32 val)
{
struct icc_rpm_smd_req req = {
.key = cpu_to_le32(RPM_KEY_BW),
.nbytes = cpu_to_le32(sizeof(u32)),
.value = cpu_to_le32(val),
};
return qcom_rpm_smd_write(icc_rpm_smd.rpm, ctx, rsc_type, id, &req,
sizeof(req));
}
EXPORT_SYMBOL(qcom_icc_rpm_smd_send);
static int qcom_icc_rpm_smd_probe(struct platform_device *pdev)
{
icc_rpm_smd.rpm = dev_get_drvdata(pdev->dev.parent);
if (!icc_rpm_smd.rpm) {
dev_err(&pdev->dev, "unable to retrieve handle to RPM\n");
return -ENODEV;
}
return 0;
}
static const struct of_device_id qcom_icc_rpm_smd_dt_match[] = {
{ .compatible = "qcom,interconnect-smd-rpm", },
{ },
};
MODULE_DEVICE_TABLE(of, qcom_interconnect_rpm_smd_dt_match);
static struct platform_driver qcom_interconnect_rpm_smd_driver = {
.driver = {
.name = "qcom-interconnect-smd-rpm",
.of_match_table = qcom_icc_rpm_smd_dt_match,
},
.probe = qcom_icc_rpm_smd_probe,
};
static int __init rpm_smd_interconnect_init(void)
{
return platform_driver_register(&qcom_interconnect_rpm_smd_driver);
}
subsys_initcall(rpm_smd_interconnect_init);
static void __exit rpm_smd_interconnect_exit(void)
{
platform_driver_unregister(&qcom_interconnect_rpm_smd_driver);
}
module_exit(rpm_smd_interconnect_exit)
MODULE_AUTHOR("Georgi Djakov <georgi.djakov@linaro.org>");
MODULE_DESCRIPTION("Qualcomm SMD RPM interconnect driver");
MODULE_LICENSE("GPL v2");
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