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