projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 57251285 SG |
1 | /* |
| 2 | * Copyright (C) 2015 Google, Inc | |
| 3 | * Written by Simon Glass <sjg@chromium.org> | |
| 4 | * | |
| 5 | * SPDX-License-Identifier: GPL-2.0+ | |
| 6 | */ | |
| 7 | ||
| 8 | #include <common.h> | |
| 9 | #include <syscon.h> | |
| 10 | #include <dm.h> | |
| 11 | #include <errno.h> | |
| 12 | #include <regmap.h> | |
| 13 | #include <dm/device-internal.h> | |
| 14 | #include <dm/lists.h> | |
| 15 | #include <dm/root.h> | |
| 16 | #include <linux/err.h> | |
| 17 | ||
| 18 | struct regmap *syscon_get_regmap(struct udevice *dev) | |
| 19 | { | |
| 9f4629be | 20 | struct syscon_uc_info *priv; |
| 57251285 | 21 | |
| 9f4629be SG |
22 | if (device_get_uclass_id(dev) != UCLASS_SYSCON) |
| 23 | return ERR_PTR(-ENOEXEC); | |
| 24 | priv = dev_get_uclass_priv(dev); | |
| 57251285 SG |
25 | return priv->regmap; |
| 26 | } | |
| 27 | ||
| 28 | static int syscon_pre_probe(struct udevice *dev) | |
| 29 | { | |
| 30 | struct syscon_uc_info *priv = dev_get_uclass_priv(dev); | |
| 31 | ||
| 32 | return regmap_init_mem(dev, &priv->regmap); | |
| 33 | } | |
| 34 | ||
| 35 | struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data) | |
| 36 | { | |
| 37 | struct udevice *dev; | |
| 38 | struct uclass *uc; | |
| 39 | int ret; | |
| 40 | ||
| 41 | ret = uclass_get(UCLASS_SYSCON, &uc); | |
| 42 | if (ret) | |
| 43 | return ERR_PTR(ret); | |
| 44 | uclass_foreach_dev(dev, uc) { | |
| 45 | if (dev->driver_data == driver_data) { | |
| 46 | struct syscon_uc_info *priv; | |
| 47 | int ret; | |
| 48 | ||
| 49 | ret = device_probe(dev); | |
| 50 | if (ret) | |
| 51 | return ERR_PTR(ret); | |
| 52 | priv = dev_get_uclass_priv(dev); | |
| 53 | ||
| 54 | return priv->regmap; | |
| 55 | } | |
| 56 | } | |
| 57 | ||
| 9f4629be | 58 | return ERR_PTR(-ENODEV); |
| 57251285 SG |
59 | } |
| 60 | ||
| 61 | void *syscon_get_first_range(ulong driver_data) | |
| 62 | { | |
| 63 | struct regmap *map; | |
| 64 | ||
| 65 | map = syscon_get_regmap_by_driver_data(driver_data); | |
| 66 | if (IS_ERR(map)) | |
| 67 | return map; | |
| 68 | return regmap_get_range(map, 0); | |
| 69 | } | |
| 70 | ||
| 71 | UCLASS_DRIVER(syscon) = { | |
| 72 | .id = UCLASS_SYSCON, | |
| 73 | .name = "syscon", | |
| 74 | .per_device_auto_alloc_size = sizeof(struct syscon_uc_info), | |
| 75 | .pre_probe = syscon_pre_probe, | |
| 76 | }; |