1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2013, The Linux Foundation. All rights reserved. 4 */ 5 6 #include <linux/bitops.h> 7 #include <linux/export.h> 8 #include <linux/regmap.h> 9 #include <linux/reset-controller.h> 10 #include <linux/delay.h> 11 12 #include "reset.h" 13 14 static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id) 15 { 16 rcdev->ops->assert(rcdev, id); 17 udelay(1); 18 rcdev->ops->deassert(rcdev, id); 19 return 0; 20 } 21 22 static int 23 qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id) 24 { 25 struct qcom_reset_controller *rst; 26 const struct qcom_reset_map *map; 27 u32 mask; 28 29 rst = to_qcom_reset_controller(rcdev); 30 map = &rst->reset_map[id]; 31 mask = BIT(map->bit); 32 33 return regmap_update_bits(rst->regmap, map->reg, mask, mask); 34 } 35 36 static int 37 qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id) 38 { 39 struct qcom_reset_controller *rst; 40 const struct qcom_reset_map *map; 41 u32 mask; 42 43 rst = to_qcom_reset_controller(rcdev); 44 map = &rst->reset_map[id]; 45 mask = BIT(map->bit); 46 47 return regmap_update_bits(rst->regmap, map->reg, mask, 0); 48 } 49 50 const struct reset_control_ops qcom_reset_ops = { 51 .reset = qcom_reset, 52 .assert = qcom_reset_assert, 53 .deassert = qcom_reset_deassert, 54 }; 55 EXPORT_SYMBOL_GPL(qcom_reset_ops); 56