| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2013 STMicroelectronics (R&D) Limited |
| 4 | * Author: Stephen Gallimore <stephen.gallimore@st.com> |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 5 | */ |
| 6 | #ifndef __STI_RESET_SYSCFG_H |
| 7 | #define __STI_RESET_SYSCFG_H |
| 8 | |
| 9 | #include <linux/device.h> |
| 10 | #include <linux/regmap.h> |
| 11 | #include <linux/reset-controller.h> |
| 12 | |
| 13 | /** |
| 14 | * Reset channel description for a system configuration register based |
| 15 | * reset controller. |
| 16 | * |
| 17 | * @compatible: Compatible string of the syscon regmap containing this |
| 18 | * channel's control and ack (status) bits. |
| 19 | * @reset: Regmap field description of the channel's reset bit. |
| 20 | * @ack: Regmap field description of the channel's acknowledge bit. |
| 21 | */ |
| 22 | struct syscfg_reset_channel_data { |
| 23 | const char *compatible; |
| 24 | struct reg_field reset; |
| 25 | struct reg_field ack; |
| 26 | }; |
| 27 | |
| 28 | #define _SYSCFG_RST_CH(_c, _rr, _rb, _ar, _ab) \ |
| 29 | { .compatible = _c, \ |
| 30 | .reset = REG_FIELD(_rr, _rb, _rb), \ |
| 31 | .ack = REG_FIELD(_ar, _ab, _ab), } |
| 32 | |
| 33 | #define _SYSCFG_RST_CH_NO_ACK(_c, _rr, _rb) \ |
| 34 | { .compatible = _c, \ |
| 35 | .reset = REG_FIELD(_rr, _rb, _rb), } |
| 36 | |
| 37 | /** |
| 38 | * Description of a system configuration register based reset controller. |
| 39 | * |
| 40 | * @wait_for_ack: The controller will wait for reset assert and de-assert to |
| 41 | * be "ack'd" in a channel's ack field. |
| 42 | * @active_low: Are the resets in this controller active low, i.e. clearing |
| 43 | * the reset bit puts the hardware into reset. |
| 44 | * @nr_channels: The number of reset channels in this controller. |
| 45 | * @channels: An array of reset channel descriptions. |
| 46 | */ |
| 47 | struct syscfg_reset_controller_data { |
| 48 | bool wait_for_ack; |
| 49 | bool active_low; |
| 50 | int nr_channels; |
| 51 | const struct syscfg_reset_channel_data *channels; |
| 52 | }; |
| 53 | |
| 54 | /** |
| 55 | * syscfg_reset_probe(): platform device probe function used by syscfg |
| 56 | * reset controller drivers. This registers a reset |
| 57 | * controller configured by the OF match data for |
| 58 | * the compatible device which should be of type |
| 59 | * "struct syscfg_reset_controller_data". |
| 60 | * |
| 61 | * @pdev: platform device |
| 62 | */ |
| 63 | int syscfg_reset_probe(struct platform_device *pdev); |
| 64 | |
| 65 | #endif /* __STI_RESET_SYSCFG_H */ |