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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
20struct 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 */
31struct apd_device_desc {
32 unsigned int fixed_clk_rate;
33 struct property_entry *properties;
34 int (*setup)(struct apd_private_data *pdata);
35};
36
37struct 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
46static 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
64static int fch_misc_setup(struct apd_private_data *pdata)
65{
66 struct acpi_device *adev = pdata->adev;
67 const union acpi_object *obj;
68 struct platform_device *clkdev;
69 struct fch_clk_data *clk_data;
70 struct resource_entry *rentry;
71 struct list_head resource_list;
72 int ret;
73
74 clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
75 if (!clk_data)
76 return -ENOMEM;
77
78 INIT_LIST_HEAD(&resource_list);
79 ret = acpi_dev_get_memory_resources(adev, &resource_list);
80 if (ret < 0)
81 return -ENOENT;
82
83 if (!acpi_dev_get_property(adev, "clk-name", ACPI_TYPE_STRING, &obj)) {
84 clk_data->name = devm_kzalloc(&adev->dev, obj->string.length,
85 GFP_KERNEL);
86 if (!clk_data->name)
87 return -ENOMEM;
88
89 strscpy(clk_data->name, obj->string.pointer, obj->string.length);
90 } else {
91 /* Set default name to mclk if entry missing in firmware */
92 clk_data->name = "mclk";
93 }
94
95 list_for_each_entry(rentry, &resource_list, node) {
96 clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
97 resource_size(rentry->res));
98 break;
99 }
100 if (!clk_data->base)
101 return -ENOMEM;
102
103 acpi_dev_free_resource_list(&resource_list);
104
105 clkdev = platform_device_register_data(&adev->dev, "clk-fch",
106 PLATFORM_DEVID_NONE, clk_data,
107 sizeof(*clk_data));
108 return PTR_ERR_OR_ZERO(clkdev);
109}
110
111static const struct apd_device_desc cz_i2c_desc = {
112 .setup = acpi_apd_setup,
113 .fixed_clk_rate = 133000000,
114};
115
116static const struct apd_device_desc wt_i2c_desc = {
117 .setup = acpi_apd_setup,
118 .fixed_clk_rate = 150000000,
119};
120
121static const struct apd_device_desc wt_i3c_desc = {
122 .setup = acpi_apd_setup,
123 .fixed_clk_rate = 125000000,
124};
125
126static struct property_entry uart_properties[] = {
127 PROPERTY_ENTRY_U32("reg-io-width", 4),
128 PROPERTY_ENTRY_U32("reg-shift", 2),
129 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
130 { },
131};
132
133static const struct apd_device_desc cz_uart_desc = {
134 .setup = acpi_apd_setup,
135 .fixed_clk_rate = 48000000,
136 .properties = uart_properties,
137};
138
139static const struct apd_device_desc fch_misc_desc = {
140 .setup = fch_misc_setup,
141};
142#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
143
144#ifdef CONFIG_ARM64
145static const struct apd_device_desc xgene_i2c_desc = {
146 .setup = acpi_apd_setup,
147 .fixed_clk_rate = 100000000,
148};
149
150static const struct apd_device_desc vulcan_spi_desc = {
151 .setup = acpi_apd_setup,
152 .fixed_clk_rate = 133000000,
153};
154
155static const struct apd_device_desc hip07_i2c_desc = {
156 .setup = acpi_apd_setup,
157 .fixed_clk_rate = 200000000,
158};
159
160static const struct apd_device_desc hip08_i2c_desc = {
161 .setup = acpi_apd_setup,
162 .fixed_clk_rate = 250000000,
163};
164
165static const struct apd_device_desc hip08_lite_i2c_desc = {
166 .setup = acpi_apd_setup,
167 .fixed_clk_rate = 125000000,
168};
169
170static const struct apd_device_desc thunderx2_i2c_desc = {
171 .setup = acpi_apd_setup,
172 .fixed_clk_rate = 125000000,
173};
174
175static const struct apd_device_desc nxp_i2c_desc = {
176 .setup = acpi_apd_setup,
177 .fixed_clk_rate = 350000000,
178};
179
180static const struct apd_device_desc hip08_spi_desc = {
181 .setup = acpi_apd_setup,
182 .fixed_clk_rate = 250000000,
183};
184#endif /* CONFIG_ARM64 */
185
186#endif
187
188/*
189 * Create platform device during acpi scan attach handle.
190 * Return value > 0 on success of creating device.
191 */
192static int acpi_apd_create_device(struct acpi_device *adev,
193 const struct acpi_device_id *id)
194{
195 const struct apd_device_desc *dev_desc = (void *)id->driver_data;
196 struct apd_private_data *pdata;
197 struct platform_device *pdev;
198 int ret;
199
200 if (!dev_desc) {
201 pdev = acpi_create_platform_device(adev, NULL);
202 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
203 }
204
205 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
206 if (!pdata)
207 return -ENOMEM;
208
209 pdata->adev = adev;
210 pdata->dev_desc = dev_desc;
211
212 if (dev_desc->setup) {
213 ret = dev_desc->setup(pdata);
214 if (ret)
215 goto err_out;
216 }
217
218 adev->driver_data = pdata;
219 pdev = acpi_create_platform_device(adev, dev_desc->properties);
220 if (!IS_ERR_OR_NULL(pdev))
221 return 1;
222
223 ret = PTR_ERR(pdev);
224 adev->driver_data = NULL;
225
226 err_out:
227 kfree(pdata);
228 return ret;
229}
230
231static const struct acpi_device_id acpi_apd_device_ids[] = {
232 /* Generic apd devices */
233#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
234 { "AMD0010", APD_ADDR(cz_i2c_desc) },
235 { "AMD0020", APD_ADDR(cz_uart_desc) },
236 { "AMD0030", },
237 { "AMD0040", APD_ADDR(fch_misc_desc)},
238 { "AMDI0010", APD_ADDR(wt_i2c_desc) },
239 { "AMDI0015", APD_ADDR(wt_i3c_desc) },
240 { "AMDI0019", APD_ADDR(wt_i2c_desc) },
241 { "AMDI0020", APD_ADDR(cz_uart_desc) },
242 { "AMDI0022", APD_ADDR(cz_uart_desc) },
243 { "HYGO0010", APD_ADDR(wt_i2c_desc) },
244#endif
245#ifdef CONFIG_ARM64
246 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
247 { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
248 { "CAV900D", APD_ADDR(vulcan_spi_desc) },
249 { "CAV9007", APD_ADDR(thunderx2_i2c_desc) },
250 { "HISI02A1", APD_ADDR(hip07_i2c_desc) },
251 { "HISI02A2", APD_ADDR(hip08_i2c_desc) },
252 { "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },
253 { "HISI0173", APD_ADDR(hip08_spi_desc) },
254 { "NXP0001", APD_ADDR(nxp_i2c_desc) },
255#endif
256 { }
257};
258
259static struct acpi_scan_handler apd_handler = {
260 .ids = acpi_apd_device_ids,
261 .attach = acpi_apd_create_device,
262};
263
264void __init acpi_apd_init(void)
265{
266 acpi_scan_add_handler(&apd_handler);
267}
1/*
2 * AMD ACPI support for ACPI2platform device.
3 *
4 * Copyright (c) 2014,2015 AMD Corporation.
5 * Authors: Ken Xue <Ken.Xue@amd.com>
6 * Wu, Jeff <Jeff.Wu@amd.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/clk-provider.h>
14#include <linux/platform_device.h>
15#include <linux/pm_domain.h>
16#include <linux/clkdev.h>
17#include <linux/acpi.h>
18#include <linux/err.h>
19#include <linux/pm.h>
20
21#include "internal.h"
22
23ACPI_MODULE_NAME("acpi_apd");
24struct apd_private_data;
25
26/**
27 * ACPI_APD_SYSFS : add device attributes in sysfs
28 * ACPI_APD_PM : attach power domain to device
29 */
30#define ACPI_APD_SYSFS BIT(0)
31#define ACPI_APD_PM BIT(1)
32
33/**
34 * struct apd_device_desc - a descriptor for apd device
35 * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
36 * @fixed_clk_rate: fixed rate input clock source for acpi device;
37 * 0 means no fixed rate input clock source
38 * @setup: a hook routine to set device resource during create platform device
39 *
40 * Device description defined as acpi_device_id.driver_data
41 */
42struct apd_device_desc {
43 unsigned int flags;
44 unsigned int fixed_clk_rate;
45 int (*setup)(struct apd_private_data *pdata);
46};
47
48struct apd_private_data {
49 struct clk *clk;
50 struct acpi_device *adev;
51 const struct apd_device_desc *dev_desc;
52};
53
54#if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
55#define APD_ADDR(desc) ((unsigned long)&desc)
56
57static int acpi_apd_setup(struct apd_private_data *pdata)
58{
59 const struct apd_device_desc *dev_desc = pdata->dev_desc;
60 struct clk *clk = ERR_PTR(-ENODEV);
61
62 if (dev_desc->fixed_clk_rate) {
63 clk = clk_register_fixed_rate(&pdata->adev->dev,
64 dev_name(&pdata->adev->dev),
65 NULL, CLK_IS_ROOT,
66 dev_desc->fixed_clk_rate);
67 clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
68 pdata->clk = clk;
69 }
70
71 return 0;
72}
73
74#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
75static struct apd_device_desc cz_i2c_desc = {
76 .setup = acpi_apd_setup,
77 .fixed_clk_rate = 133000000,
78};
79
80static struct apd_device_desc cz_uart_desc = {
81 .setup = acpi_apd_setup,
82 .fixed_clk_rate = 48000000,
83};
84#endif
85
86#ifdef CONFIG_ARM64
87static struct apd_device_desc xgene_i2c_desc = {
88 .setup = acpi_apd_setup,
89 .fixed_clk_rate = 100000000,
90};
91#endif
92
93#else
94
95#define APD_ADDR(desc) (0UL)
96
97#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
98
99/**
100* Create platform device during acpi scan attach handle.
101* Return value > 0 on success of creating device.
102*/
103static int acpi_apd_create_device(struct acpi_device *adev,
104 const struct acpi_device_id *id)
105{
106 const struct apd_device_desc *dev_desc = (void *)id->driver_data;
107 struct apd_private_data *pdata;
108 struct platform_device *pdev;
109 int ret;
110
111 if (!dev_desc) {
112 pdev = acpi_create_platform_device(adev);
113 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
114 }
115
116 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
117 if (!pdata)
118 return -ENOMEM;
119
120 pdata->adev = adev;
121 pdata->dev_desc = dev_desc;
122
123 if (dev_desc->setup) {
124 ret = dev_desc->setup(pdata);
125 if (ret)
126 goto err_out;
127 }
128
129 adev->driver_data = pdata;
130 pdev = acpi_create_platform_device(adev);
131 if (!IS_ERR_OR_NULL(pdev))
132 return 1;
133
134 ret = PTR_ERR(pdev);
135 adev->driver_data = NULL;
136
137 err_out:
138 kfree(pdata);
139 return ret;
140}
141
142static const struct acpi_device_id acpi_apd_device_ids[] = {
143 /* Generic apd devices */
144#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
145 { "AMD0010", APD_ADDR(cz_i2c_desc) },
146 { "AMDI0010", APD_ADDR(cz_i2c_desc) },
147 { "AMD0020", APD_ADDR(cz_uart_desc) },
148 { "AMDI0020", APD_ADDR(cz_uart_desc) },
149 { "AMD0030", },
150#endif
151#ifdef CONFIG_ARM64
152 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
153#endif
154 { }
155};
156
157static struct acpi_scan_handler apd_handler = {
158 .ids = acpi_apd_device_ids,
159 .attach = acpi_apd_create_device,
160};
161
162void __init acpi_apd_init(void)
163{
164 acpi_scan_add_handler(&apd_handler);
165}