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