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65 lines
2.1 KiB
65 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* Copyright (C) 2013 STMicroelectronics (R&D) Limited |
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* Author: Stephen Gallimore <[email protected]> |
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*/ |
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#ifndef __STI_RESET_SYSCFG_H |
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#define __STI_RESET_SYSCFG_H |
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#include <linux/device.h> |
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#include <linux/regmap.h> |
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#include <linux/reset-controller.h> |
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/** |
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* Reset channel description for a system configuration register based |
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* reset controller. |
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* |
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* @compatible: Compatible string of the syscon regmap containing this |
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* channel's control and ack (status) bits. |
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* @reset: Regmap field description of the channel's reset bit. |
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* @ack: Regmap field description of the channel's acknowledge bit. |
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*/ |
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struct syscfg_reset_channel_data { |
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const char *compatible; |
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struct reg_field reset; |
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struct reg_field ack; |
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}; |
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#define _SYSCFG_RST_CH(_c, _rr, _rb, _ar, _ab) \ |
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{ .compatible = _c, \ |
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.reset = REG_FIELD(_rr, _rb, _rb), \ |
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.ack = REG_FIELD(_ar, _ab, _ab), } |
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#define _SYSCFG_RST_CH_NO_ACK(_c, _rr, _rb) \ |
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{ .compatible = _c, \ |
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.reset = REG_FIELD(_rr, _rb, _rb), } |
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/** |
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* Description of a system configuration register based reset controller. |
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* |
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* @wait_for_ack: The controller will wait for reset assert and de-assert to |
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* be "ack'd" in a channel's ack field. |
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* @active_low: Are the resets in this controller active low, i.e. clearing |
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* the reset bit puts the hardware into reset. |
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* @nr_channels: The number of reset channels in this controller. |
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* @channels: An array of reset channel descriptions. |
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*/ |
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struct syscfg_reset_controller_data { |
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bool wait_for_ack; |
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bool active_low; |
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int nr_channels; |
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const struct syscfg_reset_channel_data *channels; |
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}; |
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/** |
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* syscfg_reset_probe(): platform device probe function used by syscfg |
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* reset controller drivers. This registers a reset |
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* controller configured by the OF match data for |
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* the compatible device which should be of type |
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* "struct syscfg_reset_controller_data". |
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* |
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* @pdev: platform device |
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*/ |
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int syscfg_reset_probe(struct platform_device *pdev); |
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#endif /* __STI_RESET_SYSCFG_H */
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