mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-28 22:13:08 +00:00
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* Texas Instruments System Control Interface (TI SCI) system reset driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
|
||
|
|
* Andreas Dannenberg <dannenberg@ti.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <common.h>
|
||
|
|
#include <dm.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <sysreset.h>
|
||
|
|
#include <linux/soc/ti/ti_sci_protocol.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* struct ti_sci_sysreset_data - sysreset controller information structure
|
||
|
|
* @sci: TI SCI handle used for communication with system controller
|
||
|
|
*/
|
||
|
|
struct ti_sci_sysreset_data {
|
||
|
|
const struct ti_sci_handle *sci;
|
||
|
|
};
|
||
|
|
|
||
|
|
static int ti_sci_sysreset_probe(struct udevice *dev)
|
||
|
|
{
|
||
|
|
struct ti_sci_sysreset_data *data = dev_get_priv(dev);
|
||
|
|
|
||
|
|
debug("%s(dev=%p)\n", __func__, dev);
|
||
|
|
|
||
|
|
if (!data)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
/* Store handle for communication with the system controller */
|
||
|
|
data->sci = ti_sci_get_handle(dev);
|
||
|
|
if (IS_ERR(data->sci))
|
||
|
|
return PTR_ERR(data->sci);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int ti_sci_sysreset_request(struct udevice *dev, enum sysreset_t type)
|
||
|
|
{
|
||
|
|
struct ti_sci_sysreset_data *data = dev_get_priv(dev);
|
||
|
|
const struct ti_sci_handle *sci = data->sci;
|
||
|
|
const struct ti_sci_core_ops *cops = &sci->ops.core_ops;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
debug("%s(dev=%p, type=%d)\n", __func__, dev, type);
|
||
|
|
|
||
|
|
ret = cops->reboot_device(sci);
|
||
|
|
if (ret)
|
||
|
|
dev_err(rst->dev, "%s: reboot_device failed (%d)\n",
|
||
|
|
__func__, ret);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct sysreset_ops ti_sci_sysreset_ops = {
|
||
|
|
.request = ti_sci_sysreset_request,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct udevice_id ti_sci_sysreset_of_match[] = {
|
||
|
|
{ .compatible = "ti,sci-sysreset", },
|
||
|
|
{ /* sentinel */ },
|
||
|
|
};
|
||
|
|
|
||
|
|
U_BOOT_DRIVER(ti_sci_sysreset) = {
|
||
|
|
.name = "ti-sci-sysreset",
|
||
|
|
.id = UCLASS_SYSRESET,
|
||
|
|
.of_match = ti_sci_sysreset_of_match,
|
||
|
|
.probe = ti_sci_sysreset_probe,
|
||
|
|
.priv_auto_alloc_size = sizeof(struct ti_sci_sysreset_data),
|
||
|
|
.ops = &ti_sci_sysreset_ops,
|
||
|
|
};
|