| Neil Armstrong | ca7fdc8 | 2018-04-11 17:08:00 +0200 | [diff] [blame] | 1 | /* |
| 2 | * dwc3-of-simple.c - OF glue layer for simple integrations |
| 3 | * |
| 4 | * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com |
| 5 | * |
| 6 | * Author: Felipe Balbi <balbi@ti.com> |
| 7 | * |
| 8 | * Copyright (C) 2018 BayLibre, SAS |
| 9 | * Author: Neil Armstrong <narmstron@baylibre.com> |
| 10 | * |
| 11 | * SPDX-License-Identifier: GPL-2.0+ |
| 12 | */ |
| 13 | |
| 14 | #include <common.h> |
| 15 | #include <dm.h> |
| 16 | #include <fdtdec.h> |
| 17 | #include <reset.h> |
| 18 | #include <clk.h> |
| 19 | |
| 20 | DECLARE_GLOBAL_DATA_PTR; |
| 21 | |
| 22 | struct dwc3_of_simple { |
| 23 | struct clk_bulk clks; |
| 24 | struct reset_ctl_bulk resets; |
| 25 | }; |
| 26 | |
| 27 | static int dwc3_of_simple_reset_init(struct udevice *dev, |
| 28 | struct dwc3_of_simple *simple) |
| 29 | { |
| 30 | int ret; |
| 31 | |
| 32 | ret = reset_get_bulk(dev, &simple->resets); |
| 33 | if (ret == -ENOTSUPP) |
| 34 | return 0; |
| 35 | else if (ret) |
| 36 | return ret; |
| 37 | |
| 38 | ret = reset_deassert_bulk(&simple->resets); |
| 39 | if (ret) { |
| 40 | reset_release_bulk(&simple->resets); |
| 41 | return ret; |
| 42 | } |
| 43 | |
| 44 | return 0; |
| 45 | } |
| 46 | |
| 47 | static int dwc3_of_simple_clk_init(struct udevice *dev, |
| 48 | struct dwc3_of_simple *simple) |
| 49 | { |
| 50 | int ret; |
| 51 | |
| 52 | ret = clk_get_bulk(dev, &simple->clks); |
| 53 | if (ret == -ENOTSUPP) |
| 54 | return 0; |
| 55 | if (ret) |
| 56 | return ret; |
| 57 | |
| 58 | #if CONFIG_IS_ENABLED(CLK) |
| 59 | ret = clk_enable_bulk(&simple->clks); |
| 60 | if (ret) { |
| 61 | clk_release_bulk(&simple->clks); |
| 62 | return ret; |
| 63 | } |
| 64 | #endif |
| 65 | |
| 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | static int dwc3_of_simple_probe(struct udevice *dev) |
| 70 | { |
| 71 | struct dwc3_of_simple *simple = dev_get_platdata(dev); |
| 72 | int ret; |
| 73 | |
| 74 | ret = dwc3_of_simple_clk_init(dev, simple); |
| 75 | if (ret) |
| 76 | return ret; |
| 77 | |
| 78 | ret = dwc3_of_simple_reset_init(dev, simple); |
| 79 | if (ret) |
| 80 | return ret; |
| 81 | |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | static int dwc3_of_simple_remove(struct udevice *dev) |
| 86 | { |
| 87 | struct dwc3_of_simple *simple = dev_get_platdata(dev); |
| 88 | |
| 89 | reset_release_bulk(&simple->resets); |
| 90 | |
| 91 | clk_release_bulk(&simple->clks); |
| 92 | |
| 93 | return dm_scan_fdt_dev(dev); |
| 94 | } |
| 95 | |
| 96 | static const struct udevice_id dwc3_of_simple_ids[] = { |
| 97 | { .compatible = "amlogic,meson-gxl-dwc3" }, |
| 98 | { } |
| 99 | }; |
| 100 | |
| 101 | U_BOOT_DRIVER(dwc3_of_simple) = { |
| 102 | .name = "dwc3-of-simple", |
| 103 | .id = UCLASS_SIMPLE_BUS, |
| 104 | .of_match = dwc3_of_simple_ids, |
| 105 | .probe = dwc3_of_simple_probe, |
| 106 | .remove = dwc3_of_simple_remove, |
| 107 | .platdata_auto_alloc_size = sizeof(struct dwc3_of_simple), |
| 108 | .flags = DM_FLAG_ALLOC_PRIV_DMA, |
| 109 | }; |