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80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
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/*
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* Copyright (C) 2013 STMicroelectronics (R&D) Limited
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* Author: Stephen Gallimore <stephen.gallimore@st.com>
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* Author: Srinivas Kandagatla <srinivas.kandagatla@st.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <dt-bindings/reset-controller/stih416-resets.h>
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#include "reset-syscfg.h"
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/*
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* STiH416 Peripheral powerdown definitions.
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*/
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static const char stih416_front[] = "st,stih416-front-syscfg";
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static const char stih416_rear[] = "st,stih416-rear-syscfg";
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static const char stih416_sbc[] = "st,stih416-sbc-syscfg";
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static const char stih416_lpm[] = "st,stih416-lpm-syscfg";
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#define STIH416_PDN_FRONT(_bit) \
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_SYSCFG_RST_CH(stih416_front, SYSCFG_1500, _bit, SYSSTAT_1578, _bit)
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#define STIH416_PDN_REAR(_cntl, _stat) \
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_SYSCFG_RST_CH(stih416_rear, SYSCFG_2525, _cntl, SYSSTAT_2583, _stat)
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#define SYSCFG_1500 0x7d0 /* Powerdown request EMI/NAND/Keyscan */
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#define SYSSTAT_1578 0x908 /* Powerdown status EMI/NAND/Keyscan */
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#define SYSCFG_2525 0x834 /* Powerdown request USB/SATA/PCIe */
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#define SYSSTAT_2583 0x91c /* Powerdown status USB/SATA/PCIe */
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static const struct syscfg_reset_channel_data stih416_powerdowns[] = {
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[STIH416_EMISS_POWERDOWN] = STIH416_PDN_FRONT(0),
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[STIH416_NAND_POWERDOWN] = STIH416_PDN_FRONT(1),
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[STIH416_KEYSCAN_POWERDOWN] = STIH416_PDN_FRONT(2),
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[STIH416_USB0_POWERDOWN] = STIH416_PDN_REAR(0, 0),
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[STIH416_USB1_POWERDOWN] = STIH416_PDN_REAR(1, 1),
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[STIH416_USB2_POWERDOWN] = STIH416_PDN_REAR(2, 2),
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[STIH416_USB3_POWERDOWN] = STIH416_PDN_REAR(6, 5),
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[STIH416_SATA0_POWERDOWN] = STIH416_PDN_REAR(3, 3),
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[STIH416_SATA1_POWERDOWN] = STIH416_PDN_REAR(4, 4),
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[STIH416_PCIE0_POWERDOWN] = STIH416_PDN_REAR(7, 9),
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[STIH416_PCIE1_POWERDOWN] = STIH416_PDN_REAR(5, 8),
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};
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static struct syscfg_reset_controller_data stih416_powerdown_controller = {
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.wait_for_ack = true,
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.nr_channels = ARRAY_SIZE(stih416_powerdowns),
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.channels = stih416_powerdowns,
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};
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static struct of_device_id stih416_reset_match[] = {
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{ .compatible = "st,stih416-powerdown",
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.data = &stih416_powerdown_controller, },
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{},
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};
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static struct platform_driver stih416_reset_driver = {
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.probe = syscfg_reset_probe,
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.driver = {
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.name = "reset-stih416",
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.owner = THIS_MODULE,
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.of_match_table = stih416_reset_match,
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},
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};
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static int __init stih416_reset_init(void)
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{
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return platform_driver_register(&stih416_reset_driver);
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}
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arch_initcall(stih416_reset_init);
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