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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Reset driver for the StarFive JH7110 SoC
*
* Copyright (C) 2022 StarFive Technology Co., Ltd.
*/
#include <linux/auxiliary_bus.h>
#include <soc/starfive/reset-starfive-jh71x0.h>
#include "reset-starfive-jh71x0.h"
#include <dt-bindings/reset/starfive,jh7110-crg.h>
struct jh7110_reset_info {
unsigned int nr_resets;
unsigned int assert_offset;
unsigned int status_offset;
};
static const struct jh7110_reset_info jh7110_sys_info = {
.nr_resets = JH7110_SYSRST_END,
.assert_offset = 0x2F8,
.status_offset = 0x308,
};
static const struct jh7110_reset_info jh7110_aon_info = {
.nr_resets = JH7110_AONRST_END,
.assert_offset = 0x38,
.status_offset = 0x3C,
};
static int jh7110_reset_probe(struct auxiliary_device *adev,
const struct auxiliary_device_id *id)
{
struct jh7110_reset_info *info = (struct jh7110_reset_info *)(id->driver_data);
struct jh71x0_reset_adev *rdev = to_jh71x0_reset_adev(adev);
void __iomem *base = rdev->base;
if (!info || !base)
return -ENODEV;
return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node,
base + info->assert_offset,
base + info->status_offset,
NULL,
info->nr_resets,
NULL);
}
static const struct auxiliary_device_id jh7110_reset_ids[] = {
{
.name = "clk_starfive_jh7110_sys.rst-sys",
.driver_data = (kernel_ulong_t)&jh7110_sys_info,
},
{
.name = "clk_starfive_jh7110_sys.rst-aon",
.driver_data = (kernel_ulong_t)&jh7110_aon_info,
},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids);
static struct auxiliary_driver jh7110_reset_driver = {
.probe = jh7110_reset_probe,
.id_table = jh7110_reset_ids,
};
module_auxiliary_driver(jh7110_reset_driver);
MODULE_AUTHOR("Hal Feng <hal.feng@starfivetech.com>");
MODULE_DESCRIPTION("StarFive JH7110 reset driver");
MODULE_LICENSE("GPL");
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