tools headers UAPI: Sync files changed by the quotactl_path unwiring
[linux-2.6-microblaze.git] / drivers / acpi / acpi_apd.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * AMD ACPI support for ACPI2platform device.
4  *
5  * Copyright (c) 2014,2015 AMD Corporation.
6  * Authors: Ken Xue <Ken.Xue@amd.com>
7  *      Wu, Jeff <Jeff.Wu@amd.com>
8  */
9
10 #include <linux/acpi.h>
11 #include <linux/clkdev.h>
12 #include <linux/clk-provider.h>
13 #include <linux/err.h>
14 #include <linux/io.h>
15 #include <linux/platform_data/clk-fch.h>
16 #include <linux/platform_device.h>
17
18 #include "internal.h"
19
20 struct apd_private_data;
21
22 /**
23  * struct apd_device_desc - a descriptor for apd device
24  * @fixed_clk_rate: fixed rate input clock source for acpi device;
25  *                      0 means no fixed rate input clock source
26  * @properties: build-in properties of the device such as UART
27  * @setup: a hook routine to set device resource during create platform device
28  *
29  * Device description defined as acpi_device_id.driver_data
30  */
31 struct apd_device_desc {
32         unsigned int fixed_clk_rate;
33         struct property_entry *properties;
34         int (*setup)(struct apd_private_data *pdata);
35 };
36
37 struct apd_private_data {
38         struct clk *clk;
39         struct acpi_device *adev;
40         const struct apd_device_desc *dev_desc;
41 };
42
43 #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
44 #define APD_ADDR(desc)  ((unsigned long)&desc)
45
46 static int acpi_apd_setup(struct apd_private_data *pdata)
47 {
48         const struct apd_device_desc *dev_desc = pdata->dev_desc;
49         struct clk *clk;
50
51         if (dev_desc->fixed_clk_rate) {
52                 clk = clk_register_fixed_rate(&pdata->adev->dev,
53                                         dev_name(&pdata->adev->dev),
54                                         NULL, 0, dev_desc->fixed_clk_rate);
55                 clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
56                 pdata->clk = clk;
57         }
58
59         return 0;
60 }
61
62 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
63 static int misc_check_res(struct acpi_resource *ares, void *data)
64 {
65         struct resource res;
66
67         return !acpi_dev_resource_memory(ares, &res);
68 }
69
70 static int fch_misc_setup(struct apd_private_data *pdata)
71 {
72         struct acpi_device *adev = pdata->adev;
73         const union acpi_object *obj;
74         struct platform_device *clkdev;
75         struct fch_clk_data *clk_data;
76         struct resource_entry *rentry;
77         struct list_head resource_list;
78         int ret;
79
80         clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
81         if (!clk_data)
82                 return -ENOMEM;
83
84         INIT_LIST_HEAD(&resource_list);
85         ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
86                                      NULL);
87         if (ret < 0)
88                 return -ENOENT;
89
90         if (!acpi_dev_get_property(adev, "is-rv", ACPI_TYPE_INTEGER, &obj))
91                 clk_data->is_rv = obj->integer.value;
92
93         list_for_each_entry(rentry, &resource_list, node) {
94                 clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
95                                               resource_size(rentry->res));
96                 break;
97         }
98
99         acpi_dev_free_resource_list(&resource_list);
100
101         clkdev = platform_device_register_data(&adev->dev, "clk-fch",
102                                                PLATFORM_DEVID_NONE, clk_data,
103                                                sizeof(*clk_data));
104         return PTR_ERR_OR_ZERO(clkdev);
105 }
106
107 static const struct apd_device_desc cz_i2c_desc = {
108         .setup = acpi_apd_setup,
109         .fixed_clk_rate = 133000000,
110 };
111
112 static const struct apd_device_desc wt_i2c_desc = {
113         .setup = acpi_apd_setup,
114         .fixed_clk_rate = 150000000,
115 };
116
117 static struct property_entry uart_properties[] = {
118         PROPERTY_ENTRY_U32("reg-io-width", 4),
119         PROPERTY_ENTRY_U32("reg-shift", 2),
120         PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
121         { },
122 };
123
124 static const struct apd_device_desc cz_uart_desc = {
125         .setup = acpi_apd_setup,
126         .fixed_clk_rate = 48000000,
127         .properties = uart_properties,
128 };
129
130 static const struct apd_device_desc fch_misc_desc = {
131         .setup = fch_misc_setup,
132 };
133 #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
134
135 #ifdef CONFIG_ARM64
136 static const struct apd_device_desc xgene_i2c_desc = {
137         .setup = acpi_apd_setup,
138         .fixed_clk_rate = 100000000,
139 };
140
141 static const struct apd_device_desc vulcan_spi_desc = {
142         .setup = acpi_apd_setup,
143         .fixed_clk_rate = 133000000,
144 };
145
146 static const struct apd_device_desc hip07_i2c_desc = {
147         .setup = acpi_apd_setup,
148         .fixed_clk_rate = 200000000,
149 };
150
151 static const struct apd_device_desc hip08_i2c_desc = {
152         .setup = acpi_apd_setup,
153         .fixed_clk_rate = 250000000,
154 };
155
156 static const struct apd_device_desc hip08_lite_i2c_desc = {
157         .setup = acpi_apd_setup,
158         .fixed_clk_rate = 125000000,
159 };
160
161 static const struct apd_device_desc thunderx2_i2c_desc = {
162         .setup = acpi_apd_setup,
163         .fixed_clk_rate = 125000000,
164 };
165
166 static const struct apd_device_desc nxp_i2c_desc = {
167         .setup = acpi_apd_setup,
168         .fixed_clk_rate = 350000000,
169 };
170
171 static const struct apd_device_desc hip08_spi_desc = {
172         .setup = acpi_apd_setup,
173         .fixed_clk_rate = 250000000,
174 };
175 #endif /* CONFIG_ARM64 */
176
177 #endif
178
179 /*
180  * Create platform device during acpi scan attach handle.
181  * Return value > 0 on success of creating device.
182  */
183 static int acpi_apd_create_device(struct acpi_device *adev,
184                                    const struct acpi_device_id *id)
185 {
186         const struct apd_device_desc *dev_desc = (void *)id->driver_data;
187         struct apd_private_data *pdata;
188         struct platform_device *pdev;
189         int ret;
190
191         if (!dev_desc) {
192                 pdev = acpi_create_platform_device(adev, NULL);
193                 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
194         }
195
196         pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
197         if (!pdata)
198                 return -ENOMEM;
199
200         pdata->adev = adev;
201         pdata->dev_desc = dev_desc;
202
203         if (dev_desc->setup) {
204                 ret = dev_desc->setup(pdata);
205                 if (ret)
206                         goto err_out;
207         }
208
209         adev->driver_data = pdata;
210         pdev = acpi_create_platform_device(adev, dev_desc->properties);
211         if (!IS_ERR_OR_NULL(pdev))
212                 return 1;
213
214         ret = PTR_ERR(pdev);
215         adev->driver_data = NULL;
216
217  err_out:
218         kfree(pdata);
219         return ret;
220 }
221
222 static const struct acpi_device_id acpi_apd_device_ids[] = {
223         /* Generic apd devices */
224 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
225         { "AMD0010", APD_ADDR(cz_i2c_desc) },
226         { "AMDI0010", APD_ADDR(wt_i2c_desc) },
227         { "AMD0020", APD_ADDR(cz_uart_desc) },
228         { "AMDI0020", APD_ADDR(cz_uart_desc) },
229         { "AMD0030", },
230         { "AMD0040", APD_ADDR(fch_misc_desc)},
231         { "HYGO0010", APD_ADDR(wt_i2c_desc) },
232 #endif
233 #ifdef CONFIG_ARM64
234         { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
235         { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
236         { "CAV900D",  APD_ADDR(vulcan_spi_desc) },
237         { "CAV9007",  APD_ADDR(thunderx2_i2c_desc) },
238         { "HISI02A1", APD_ADDR(hip07_i2c_desc) },
239         { "HISI02A2", APD_ADDR(hip08_i2c_desc) },
240         { "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },
241         { "HISI0173", APD_ADDR(hip08_spi_desc) },
242         { "NXP0001", APD_ADDR(nxp_i2c_desc) },
243 #endif
244         { }
245 };
246
247 static struct acpi_scan_handler apd_handler = {
248         .ids = acpi_apd_device_ids,
249         .attach = acpi_apd_create_device,
250 };
251
252 void __init acpi_apd_init(void)
253 {
254         acpi_scan_add_handler(&apd_handler);
255 }