| Stephen Gallimore | e5d7607 | 2013-08-07 15:53:12 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 STMicroelectronics (R&D) Limited |
| 3 | * Author: Stephen Gallimore <stephen.gallimore@st.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | */ |
| 10 | #ifndef __STI_RESET_SYSCFG_H |
| 11 | #define __STI_RESET_SYSCFG_H |
| 12 | |
| 13 | #include <linux/device.h> |
| 14 | #include <linux/regmap.h> |
| 15 | #include <linux/reset-controller.h> |
| 16 | |
| 17 | /** |
| 18 | * Reset channel description for a system configuration register based |
| 19 | * reset controller. |
| 20 | * |
| 21 | * @compatible: Compatible string of the syscon regmap containing this |
| 22 | * channel's control and ack (status) bits. |
| 23 | * @reset: Regmap field description of the channel's reset bit. |
| 24 | * @ack: Regmap field description of the channel's acknowledge bit. |
| 25 | */ |
| 26 | struct syscfg_reset_channel_data { |
| 27 | const char *compatible; |
| 28 | struct reg_field reset; |
| 29 | struct reg_field ack; |
| 30 | }; |
| 31 | |
| 32 | #define _SYSCFG_RST_CH(_c, _rr, _rb, _ar, _ab) \ |
| 33 | { .compatible = _c, \ |
| 34 | .reset = REG_FIELD(_rr, _rb, _rb), \ |
| 35 | .ack = REG_FIELD(_ar, _ab, _ab), } |
| 36 | |
| 37 | #define _SYSCFG_RST_CH_NO_ACK(_c, _rr, _rb) \ |
| 38 | { .compatible = _c, \ |
| 39 | .reset = REG_FIELD(_rr, _rb, _rb), } |
| 40 | |
| 41 | /** |
| 42 | * Description of a system configuration register based reset controller. |
| 43 | * |
| 44 | * @wait_for_ack: The controller will wait for reset assert and de-assert to |
| 45 | * be "ack'd" in a channel's ack field. |
| 46 | * @active_low: Are the resets in this controller active low, i.e. clearing |
| 47 | * the reset bit puts the hardware into reset. |
| 48 | * @nr_channels: The number of reset channels in this controller. |
| 49 | * @channels: An array of reset channel descriptions. |
| 50 | */ |
| 51 | struct syscfg_reset_controller_data { |
| 52 | bool wait_for_ack; |
| 53 | bool active_low; |
| 54 | int nr_channels; |
| 55 | const struct syscfg_reset_channel_data *channels; |
| 56 | }; |
| 57 | |
| 58 | /** |
| 59 | * syscfg_reset_probe(): platform device probe function used by syscfg |
| 60 | * reset controller drivers. This registers a reset |
| 61 | * controller configured by the OF match data for |
| 62 | * the compatible device which should be of type |
| 63 | * "struct syscfg_reset_controller_data". |
| 64 | * |
| 65 | * @pdev: platform device |
| 66 | */ |
| 67 | int syscfg_reset_probe(struct platform_device *pdev); |
| 68 | |
| 69 | #endif /* __STI_RESET_SYSCFG_H */ |