1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Reset driver for the StarFive JH7110 SoC
  4 *
  5 * Copyright (C) 2022 StarFive Technology Co., Ltd.
  6 */
  7
  8#include <linux/auxiliary_bus.h>
  9
 10#include <soc/starfive/reset-starfive-jh71x0.h>
 11
 12#include "reset-starfive-jh71x0.h"
 13
 14#include <dt-bindings/reset/starfive,jh7110-crg.h>
 15
 16struct jh7110_reset_info {
 17	unsigned int nr_resets;
 18	unsigned int assert_offset;
 19	unsigned int status_offset;
 20};
 21
 22static const struct jh7110_reset_info jh7110_sys_info = {
 23	.nr_resets = JH7110_SYSRST_END,
 24	.assert_offset = 0x2F8,
 25	.status_offset = 0x308,
 26};
 27
 28static const struct jh7110_reset_info jh7110_aon_info = {
 29	.nr_resets = JH7110_AONRST_END,
 30	.assert_offset = 0x38,
 31	.status_offset = 0x3C,
 32};
 33
 34static const struct jh7110_reset_info jh7110_stg_info = {
 35	.nr_resets = JH7110_STGRST_END,
 36	.assert_offset = 0x74,
 37	.status_offset = 0x78,
 38};
 39
 40static const struct jh7110_reset_info jh7110_isp_info = {
 41	.nr_resets = JH7110_ISPRST_END,
 42	.assert_offset = 0x38,
 43	.status_offset = 0x3C,
 44};
 45
 46static const struct jh7110_reset_info jh7110_vout_info = {
 47	.nr_resets = JH7110_VOUTRST_END,
 48	.assert_offset = 0x48,
 49	.status_offset = 0x4C,
 50};
 51
 52static int jh7110_reset_probe(struct auxiliary_device *adev,
 53			      const struct auxiliary_device_id *id)
 54{
 55	struct jh7110_reset_info *info = (struct jh7110_reset_info *)(id->driver_data);
 56	struct jh71x0_reset_adev *rdev = to_jh71x0_reset_adev(adev);
 57	void __iomem *base = rdev->base;
 58
 59	if (!info || !base)
 60		return -ENODEV;
 61
 62	return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node,
 63					      base + info->assert_offset,
 64					      base + info->status_offset,
 65					      NULL,
 66					      info->nr_resets,
 67					      NULL);
 68}
 69
 70static const struct auxiliary_device_id jh7110_reset_ids[] = {
 71	{
 72		.name = "clk_starfive_jh7110_sys.rst-sys",
 73		.driver_data = (kernel_ulong_t)&jh7110_sys_info,
 74	},
 75	{
 76		.name = "clk_starfive_jh7110_sys.rst-aon",
 77		.driver_data = (kernel_ulong_t)&jh7110_aon_info,
 78	},
 79	{
 80		.name = "clk_starfive_jh7110_sys.rst-stg",
 81		.driver_data = (kernel_ulong_t)&jh7110_stg_info,
 82	},
 83	{
 84		.name = "clk_starfive_jh7110_sys.rst-isp",
 85		.driver_data = (kernel_ulong_t)&jh7110_isp_info,
 86	},
 87	{
 88		.name = "clk_starfive_jh7110_sys.rst-vo",
 89		.driver_data = (kernel_ulong_t)&jh7110_vout_info,
 90	},
 91	{ /* sentinel */ }
 92};
 93MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids);
 94
 95static struct auxiliary_driver jh7110_reset_driver = {
 96	.probe		= jh7110_reset_probe,
 97	.id_table	= jh7110_reset_ids,
 98};
 99module_auxiliary_driver(jh7110_reset_driver);
100
101MODULE_AUTHOR("Hal Feng <hal.feng@starfivetech.com>");
102MODULE_DESCRIPTION("StarFive JH7110 reset driver");
103MODULE_LICENSE("GPL");