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 int jh7110_reset_probe(struct auxiliary_device *adev, 35 const struct auxiliary_device_id *id) 36 { 37 struct jh7110_reset_info *info = (struct jh7110_reset_info *)(id->driver_data); 38 struct jh71x0_reset_adev *rdev = to_jh71x0_reset_adev(adev); 39 void __iomem *base = rdev->base; 40 41 if (!info || !base) 42 return -ENODEV; 43 44 return reset_starfive_jh71x0_register(&adev->dev, adev->dev.parent->of_node, 45 base + info->assert_offset, 46 base + info->status_offset, 47 NULL, 48 info->nr_resets, 49 NULL); 50 } 51 52 static const struct auxiliary_device_id jh7110_reset_ids[] = { 53 { 54 .name = "clk_starfive_jh7110_sys.rst-sys", 55 .driver_data = (kernel_ulong_t)&jh7110_sys_info, 56 }, 57 { 58 .name = "clk_starfive_jh7110_sys.rst-aon", 59 .driver_data = (kernel_ulong_t)&jh7110_aon_info, 60 }, 61 { /* sentinel */ } 62 }; 63 MODULE_DEVICE_TABLE(auxiliary, jh7110_reset_ids); 64 65 static struct auxiliary_driver jh7110_reset_driver = { 66 .probe = jh7110_reset_probe, 67 .id_table = jh7110_reset_ids, 68 }; 69 module_auxiliary_driver(jh7110_reset_driver); 70 71 MODULE_AUTHOR("Hal Feng <hal.feng@starfivetech.com>"); 72 MODULE_DESCRIPTION("StarFive JH7110 reset driver"); 73 MODULE_LICENSE("GPL"); 74