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 16 struct jh7110_reset_info { 17 unsigned int nr_resets; 18 unsigned int assert_offset; 19 unsigned int status_offset; 20 }; 21 22 static const struct jh7110_reset_info jh7110_sys_info = { 23 .nr_resets = JH7110_SYSRST_END, 24 .assert_offset = 0x2F8, 25 .status_offset = 0x308, 26 }; 27 28 static const struct jh7110_reset_info jh7110_aon_info = { 29 .nr_resets = JH7110_AONRST_END, 30 .assert_offset = 0x38, 31 .status_offset = 0x3C, 32 }; 33 34 static const struct jh7110_reset_info jh7110_stg_info = { 35 .nr_resets = JH7110_STGRST_END, 36 .assert_offset = 0x74, 37 .status_offset = 0x78, 38 }; 39 40 static const struct jh7110_reset_info jh7110_isp_info = { 41 .nr_resets = JH7110_ISPRST_END, 42 .assert_offset = 0x38, 43 .status_offset = 0x3C, 44 }; 45 46 static const struct jh7110_reset_info jh7110_vout_info = { 47 .nr_resets = JH7110_VOUTRST_END, 48 .assert_offset = 0x48, 49 .status_offset = 0x4C, 50 }; 51 52 static 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 70 static 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 }; 93 MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids); 94 95 static struct auxiliary_driver jh7110_reset_driver = { 96 .probe = jh7110_reset_probe, 97 .id_table = jh7110_reset_ids, 98 }; 99 module_auxiliary_driver(jh7110_reset_driver); 100 101 MODULE_AUTHOR("Hal Feng <hal.feng@starfivetech.com>"); 102 MODULE_DESCRIPTION("StarFive JH7110 reset driver"); 103 MODULE_LICENSE("GPL"); 104