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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2025 NXP
*/
#include <linux/firmware/imx/sm.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/scmi_protocol.h>
#include <linux/scmi_imx_protocol.h>
static const struct scmi_imx_cpu_proto_ops *imx_cpu_ops;
static struct scmi_protocol_handle *ph;
int scmi_imx_cpu_reset_vector_set(u32 cpuid, u64 vector, bool start, bool boot,
bool resume)
{
if (!ph)
return -EPROBE_DEFER;
return imx_cpu_ops->cpu_reset_vector_set(ph, cpuid, vector, start,
boot, resume);
}
EXPORT_SYMBOL(scmi_imx_cpu_reset_vector_set);
int scmi_imx_cpu_start(u32 cpuid, bool start)
{
if (!ph)
return -EPROBE_DEFER;
if (start)
return imx_cpu_ops->cpu_start(ph, cpuid, true);
return imx_cpu_ops->cpu_start(ph, cpuid, false);
};
EXPORT_SYMBOL(scmi_imx_cpu_start);
int scmi_imx_cpu_started(u32 cpuid, bool *started)
{
if (!ph)
return -EPROBE_DEFER;
if (!started)
return -EINVAL;
return imx_cpu_ops->cpu_started(ph, cpuid, started);
};
EXPORT_SYMBOL(scmi_imx_cpu_started);
static int scmi_imx_cpu_probe(struct scmi_device *sdev)
{
const struct scmi_handle *handle = sdev->handle;
if (!handle)
return -ENODEV;
if (imx_cpu_ops) {
dev_err(&sdev->dev, "sm cpu already initialized\n");
return -EEXIST;
}
imx_cpu_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_IMX_CPU, &ph);
if (IS_ERR(imx_cpu_ops))
return PTR_ERR(imx_cpu_ops);
return 0;
}
static const struct scmi_device_id scmi_id_table[] = {
{ SCMI_PROTOCOL_IMX_CPU, "imx-cpu" },
{ },
};
MODULE_DEVICE_TABLE(scmi, scmi_id_table);
static struct scmi_driver scmi_imx_cpu_driver = {
.name = "scmi-imx-cpu",
.probe = scmi_imx_cpu_probe,
.id_table = scmi_id_table,
};
module_scmi_driver(scmi_imx_cpu_driver);
MODULE_AUTHOR("Peng Fan <peng.fan@nxp.com>");
MODULE_DESCRIPTION("IMX SM CPU driver");
MODULE_LICENSE("GPL");
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