| Stephen Gallimore | 1f42c29 | 2013-08-07 16:31:25 +0100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2013 STMicroelectronics (R&D) Limited |
| 3 | * Author: Stephen Gallimore <stephen.gallimore@st.com> |
| 4 | * Author: Srinivas Kandagatla <srinivas.kandagatla@st.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | */ |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/of.h> |
| 13 | #include <linux/of_platform.h> |
| 14 | #include <linux/platform_device.h> |
| 15 | |
| 16 | #include <dt-bindings/reset-controller/stih415-resets.h> |
| 17 | |
| 18 | #include "reset-syscfg.h" |
| 19 | |
| 20 | /* |
| 21 | * STiH415 Peripheral powerdown definitions. |
| 22 | */ |
| 23 | static const char stih415_front[] = "st,stih415-front-syscfg"; |
| 24 | static const char stih415_rear[] = "st,stih415-rear-syscfg"; |
| 25 | static const char stih415_sbc[] = "st,stih415-sbc-syscfg"; |
| 26 | static const char stih415_lpm[] = "st,stih415-lpm-syscfg"; |
| 27 | |
| 28 | #define STIH415_PDN_FRONT(_bit) \ |
| 29 | _SYSCFG_RST_CH(stih415_front, SYSCFG_114, _bit, SYSSTAT_187, _bit) |
| 30 | |
| 31 | #define STIH415_PDN_REAR(_cntl, _stat) \ |
| 32 | _SYSCFG_RST_CH(stih415_rear, SYSCFG_336, _cntl, SYSSTAT_384, _stat) |
| 33 | |
| 34 | #define SYSCFG_114 0x38 /* Powerdown request EMI/NAND/Keyscan */ |
| 35 | #define SYSSTAT_187 0x15c /* Powerdown status EMI/NAND/Keyscan */ |
| 36 | |
| 37 | #define SYSCFG_336 0x90 /* Powerdown request USB/SATA/PCIe */ |
| 38 | #define SYSSTAT_384 0x150 /* Powerdown status USB/SATA/PCIe */ |
| 39 | |
| 40 | static const struct syscfg_reset_channel_data stih415_powerdowns[] = { |
| 41 | [STIH415_EMISS_POWERDOWN] = STIH415_PDN_FRONT(0), |
| 42 | [STIH415_NAND_POWERDOWN] = STIH415_PDN_FRONT(1), |
| 43 | [STIH415_KEYSCAN_POWERDOWN] = STIH415_PDN_FRONT(2), |
| 44 | [STIH415_USB0_POWERDOWN] = STIH415_PDN_REAR(0, 0), |
| 45 | [STIH415_USB1_POWERDOWN] = STIH415_PDN_REAR(1, 1), |
| 46 | [STIH415_USB2_POWERDOWN] = STIH415_PDN_REAR(2, 2), |
| 47 | [STIH415_SATA0_POWERDOWN] = STIH415_PDN_REAR(3, 3), |
| 48 | [STIH415_SATA1_POWERDOWN] = STIH415_PDN_REAR(4, 4), |
| 49 | [STIH415_PCIE_POWERDOWN] = STIH415_PDN_REAR(5, 8), |
| 50 | }; |
| 51 | |
| 52 | static struct syscfg_reset_controller_data stih415_powerdown_controller = { |
| 53 | .wait_for_ack = true, |
| 54 | .nr_channels = ARRAY_SIZE(stih415_powerdowns), |
| 55 | .channels = stih415_powerdowns, |
| 56 | }; |
| 57 | |
| 58 | static struct of_device_id stih415_reset_match[] = { |
| 59 | { .compatible = "st,stih415-powerdown", |
| 60 | .data = &stih415_powerdown_controller, }, |
| 61 | {}, |
| 62 | }; |
| 63 | |
| 64 | static struct platform_driver stih415_reset_driver = { |
| 65 | .probe = syscfg_reset_probe, |
| 66 | .driver = { |
| 67 | .name = "reset-stih415", |
| 68 | .owner = THIS_MODULE, |
| 69 | .of_match_table = stih415_reset_match, |
| 70 | }, |
| 71 | }; |
| 72 | |
| 73 | static int __init stih415_reset_init(void) |
| 74 | { |
| 75 | return platform_driver_register(&stih415_reset_driver); |
| 76 | } |
| 77 | arch_initcall(stih415_reset_init); |