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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Reset driver for the StarFive JH7110 SoC4 *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");104