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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/clk-provider.h>
11#include <linux/platform_data/clk-fch.h>
12#include <linux/platform_device.h>
13#include <linux/pm_domain.h>
14#include <linux/clkdev.h>
15#include <linux/acpi.h>
16#include <linux/err.h>
17#include <linux/io.h>
18#include <linux/pm.h>
19
20#include "internal.h"
21
22ACPI_MODULE_NAME("acpi_apd");
23struct apd_private_data;
24
25/**
26 * ACPI_APD_SYSFS : add device attributes in sysfs
27 * ACPI_APD_PM : attach power domain to device
28 */
29#define ACPI_APD_SYSFS BIT(0)
30#define ACPI_APD_PM BIT(1)
31
32/**
33 * struct apd_device_desc - a descriptor for apd device
34 * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
35 * @fixed_clk_rate: fixed rate input clock source for acpi device;
36 * 0 means no fixed rate input clock source
37 * @setup: a hook routine to set device resource during create platform device
38 *
39 * Device description defined as acpi_device_id.driver_data
40 */
41struct apd_device_desc {
42 unsigned int flags;
43 unsigned int fixed_clk_rate;
44 struct property_entry *properties;
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;
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, 0, dev_desc->fixed_clk_rate);
66 clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
67 pdata->clk = clk;
68 }
69
70 return 0;
71}
72
73#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
74
75static int misc_check_res(struct acpi_resource *ares, void *data)
76{
77 struct resource res;
78
79 return !acpi_dev_resource_memory(ares, &res);
80}
81
82static int fch_misc_setup(struct apd_private_data *pdata)
83{
84 struct acpi_device *adev = pdata->adev;
85 const union acpi_object *obj;
86 struct platform_device *clkdev;
87 struct fch_clk_data *clk_data;
88 struct resource_entry *rentry;
89 struct list_head resource_list;
90 int ret;
91
92 clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
93 if (!clk_data)
94 return -ENOMEM;
95
96 INIT_LIST_HEAD(&resource_list);
97 ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
98 NULL);
99 if (ret < 0)
100 return -ENOENT;
101
102 if (!acpi_dev_get_property(adev, "is-rv", ACPI_TYPE_INTEGER, &obj))
103 clk_data->is_rv = obj->integer.value;
104
105 list_for_each_entry(rentry, &resource_list, node) {
106 clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
107 resource_size(rentry->res));
108 break;
109 }
110
111 acpi_dev_free_resource_list(&resource_list);
112
113 clkdev = platform_device_register_data(&adev->dev, "clk-fch",
114 PLATFORM_DEVID_NONE, clk_data,
115 sizeof(*clk_data));
116 return PTR_ERR_OR_ZERO(clkdev);
117}
118
119static const struct apd_device_desc cz_i2c_desc = {
120 .setup = acpi_apd_setup,
121 .fixed_clk_rate = 133000000,
122};
123
124static const struct apd_device_desc wt_i2c_desc = {
125 .setup = acpi_apd_setup,
126 .fixed_clk_rate = 150000000,
127};
128
129static struct property_entry uart_properties[] = {
130 PROPERTY_ENTRY_U32("reg-io-width", 4),
131 PROPERTY_ENTRY_U32("reg-shift", 2),
132 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
133 { },
134};
135
136static const struct apd_device_desc cz_uart_desc = {
137 .setup = acpi_apd_setup,
138 .fixed_clk_rate = 48000000,
139 .properties = uart_properties,
140};
141
142static const struct apd_device_desc fch_misc_desc = {
143 .setup = fch_misc_setup,
144};
145#endif
146
147#ifdef CONFIG_ARM64
148static const struct apd_device_desc xgene_i2c_desc = {
149 .setup = acpi_apd_setup,
150 .fixed_clk_rate = 100000000,
151};
152
153static const struct apd_device_desc vulcan_spi_desc = {
154 .setup = acpi_apd_setup,
155 .fixed_clk_rate = 133000000,
156};
157
158static const struct apd_device_desc hip07_i2c_desc = {
159 .setup = acpi_apd_setup,
160 .fixed_clk_rate = 200000000,
161};
162
163static const struct apd_device_desc hip08_i2c_desc = {
164 .setup = acpi_apd_setup,
165 .fixed_clk_rate = 250000000,
166};
167
168static const struct apd_device_desc hip08_lite_i2c_desc = {
169 .setup = acpi_apd_setup,
170 .fixed_clk_rate = 125000000,
171};
172
173static const struct apd_device_desc thunderx2_i2c_desc = {
174 .setup = acpi_apd_setup,
175 .fixed_clk_rate = 125000000,
176};
177
178static const struct apd_device_desc nxp_i2c_desc = {
179 .setup = acpi_apd_setup,
180 .fixed_clk_rate = 350000000,
181};
182
183static const struct apd_device_desc hip08_spi_desc = {
184 .setup = acpi_apd_setup,
185 .fixed_clk_rate = 250000000,
186};
187#endif
188
189#else
190
191#define APD_ADDR(desc) (0UL)
192
193#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
194
195/**
196* Create platform device during acpi scan attach handle.
197* Return value > 0 on success of creating device.
198*/
199static int acpi_apd_create_device(struct acpi_device *adev,
200 const struct acpi_device_id *id)
201{
202 const struct apd_device_desc *dev_desc = (void *)id->driver_data;
203 struct apd_private_data *pdata;
204 struct platform_device *pdev;
205 int ret;
206
207 if (!dev_desc) {
208 pdev = acpi_create_platform_device(adev, NULL);
209 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
210 }
211
212 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
213 if (!pdata)
214 return -ENOMEM;
215
216 pdata->adev = adev;
217 pdata->dev_desc = dev_desc;
218
219 if (dev_desc->setup) {
220 ret = dev_desc->setup(pdata);
221 if (ret)
222 goto err_out;
223 }
224
225 adev->driver_data = pdata;
226 pdev = acpi_create_platform_device(adev, dev_desc->properties);
227 if (!IS_ERR_OR_NULL(pdev))
228 return 1;
229
230 ret = PTR_ERR(pdev);
231 adev->driver_data = NULL;
232
233 err_out:
234 kfree(pdata);
235 return ret;
236}
237
238static const struct acpi_device_id acpi_apd_device_ids[] = {
239 /* Generic apd devices */
240#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
241 { "AMD0010", APD_ADDR(cz_i2c_desc) },
242 { "AMDI0010", APD_ADDR(wt_i2c_desc) },
243 { "AMD0020", APD_ADDR(cz_uart_desc) },
244 { "AMDI0020", APD_ADDR(cz_uart_desc) },
245 { "AMD0030", },
246 { "AMD0040", APD_ADDR(fch_misc_desc)},
247 { "HYGO0010", APD_ADDR(wt_i2c_desc) },
248#endif
249#ifdef CONFIG_ARM64
250 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
251 { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
252 { "CAV900D", APD_ADDR(vulcan_spi_desc) },
253 { "CAV9007", APD_ADDR(thunderx2_i2c_desc) },
254 { "HISI02A1", APD_ADDR(hip07_i2c_desc) },
255 { "HISI02A2", APD_ADDR(hip08_i2c_desc) },
256 { "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },
257 { "HISI0173", APD_ADDR(hip08_spi_desc) },
258 { "NXP0001", APD_ADDR(nxp_i2c_desc) },
259#endif
260 { }
261};
262
263static struct acpi_scan_handler apd_handler = {
264 .ids = acpi_apd_device_ids,
265 .attach = acpi_apd_create_device,
266};
267
268void __init acpi_apd_init(void)
269{
270 acpi_scan_add_handler(&apd_handler);
271}
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
87 strcpy(clk_data->name, obj->string.pointer);
88 } else {
89 /* Set default name to mclk if entry missing in firmware */
90 clk_data->name = "mclk";
91 }
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 if (!clk_data->base)
99 return -ENOMEM;
100
101 acpi_dev_free_resource_list(&resource_list);
102
103 clkdev = platform_device_register_data(&adev->dev, "clk-fch",
104 PLATFORM_DEVID_NONE, clk_data,
105 sizeof(*clk_data));
106 return PTR_ERR_OR_ZERO(clkdev);
107}
108
109static const struct apd_device_desc cz_i2c_desc = {
110 .setup = acpi_apd_setup,
111 .fixed_clk_rate = 133000000,
112};
113
114static const struct apd_device_desc wt_i2c_desc = {
115 .setup = acpi_apd_setup,
116 .fixed_clk_rate = 150000000,
117};
118
119static struct property_entry uart_properties[] = {
120 PROPERTY_ENTRY_U32("reg-io-width", 4),
121 PROPERTY_ENTRY_U32("reg-shift", 2),
122 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
123 { },
124};
125
126static const struct apd_device_desc cz_uart_desc = {
127 .setup = acpi_apd_setup,
128 .fixed_clk_rate = 48000000,
129 .properties = uart_properties,
130};
131
132static const struct apd_device_desc fch_misc_desc = {
133 .setup = fch_misc_setup,
134};
135#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
136
137#ifdef CONFIG_ARM64
138static const struct apd_device_desc xgene_i2c_desc = {
139 .setup = acpi_apd_setup,
140 .fixed_clk_rate = 100000000,
141};
142
143static const struct apd_device_desc vulcan_spi_desc = {
144 .setup = acpi_apd_setup,
145 .fixed_clk_rate = 133000000,
146};
147
148static const struct apd_device_desc hip07_i2c_desc = {
149 .setup = acpi_apd_setup,
150 .fixed_clk_rate = 200000000,
151};
152
153static const struct apd_device_desc hip08_i2c_desc = {
154 .setup = acpi_apd_setup,
155 .fixed_clk_rate = 250000000,
156};
157
158static const struct apd_device_desc hip08_lite_i2c_desc = {
159 .setup = acpi_apd_setup,
160 .fixed_clk_rate = 125000000,
161};
162
163static const struct apd_device_desc thunderx2_i2c_desc = {
164 .setup = acpi_apd_setup,
165 .fixed_clk_rate = 125000000,
166};
167
168static const struct apd_device_desc nxp_i2c_desc = {
169 .setup = acpi_apd_setup,
170 .fixed_clk_rate = 350000000,
171};
172
173static const struct apd_device_desc hip08_spi_desc = {
174 .setup = acpi_apd_setup,
175 .fixed_clk_rate = 250000000,
176};
177#endif /* CONFIG_ARM64 */
178
179#endif
180
181/*
182 * Create platform device during acpi scan attach handle.
183 * Return value > 0 on success of creating device.
184 */
185static int acpi_apd_create_device(struct acpi_device *adev,
186 const struct acpi_device_id *id)
187{
188 const struct apd_device_desc *dev_desc = (void *)id->driver_data;
189 struct apd_private_data *pdata;
190 struct platform_device *pdev;
191 int ret;
192
193 if (!dev_desc) {
194 pdev = acpi_create_platform_device(adev, NULL);
195 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
196 }
197
198 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
199 if (!pdata)
200 return -ENOMEM;
201
202 pdata->adev = adev;
203 pdata->dev_desc = dev_desc;
204
205 if (dev_desc->setup) {
206 ret = dev_desc->setup(pdata);
207 if (ret)
208 goto err_out;
209 }
210
211 adev->driver_data = pdata;
212 pdev = acpi_create_platform_device(adev, dev_desc->properties);
213 if (!IS_ERR_OR_NULL(pdev))
214 return 1;
215
216 ret = PTR_ERR(pdev);
217 adev->driver_data = NULL;
218
219 err_out:
220 kfree(pdata);
221 return ret;
222}
223
224static const struct acpi_device_id acpi_apd_device_ids[] = {
225 /* Generic apd devices */
226#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
227 { "AMD0010", APD_ADDR(cz_i2c_desc) },
228 { "AMD0020", APD_ADDR(cz_uart_desc) },
229 { "AMD0030", },
230 { "AMD0040", APD_ADDR(fch_misc_desc)},
231 { "AMDI0010", APD_ADDR(wt_i2c_desc) },
232 { "AMDI0019", APD_ADDR(wt_i2c_desc) },
233 { "AMDI0020", APD_ADDR(cz_uart_desc) },
234 { "AMDI0022", APD_ADDR(cz_uart_desc) },
235 { "HYGO0010", APD_ADDR(wt_i2c_desc) },
236#endif
237#ifdef CONFIG_ARM64
238 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
239 { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
240 { "CAV900D", APD_ADDR(vulcan_spi_desc) },
241 { "CAV9007", APD_ADDR(thunderx2_i2c_desc) },
242 { "HISI02A1", APD_ADDR(hip07_i2c_desc) },
243 { "HISI02A2", APD_ADDR(hip08_i2c_desc) },
244 { "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },
245 { "HISI0173", APD_ADDR(hip08_spi_desc) },
246 { "NXP0001", APD_ADDR(nxp_i2c_desc) },
247#endif
248 { }
249};
250
251static struct acpi_scan_handler apd_handler = {
252 .ids = acpi_apd_device_ids,
253 .attach = acpi_apd_create_device,
254};
255
256void __init acpi_apd_init(void)
257{
258 acpi_scan_add_handler(&apd_handler);
259}