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92082a88 KX |
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> | |
3f4ba94e | 14 | #include <linux/platform_data/clk-st.h> |
92082a88 KX |
15 | #include <linux/platform_device.h> |
16 | #include <linux/pm_domain.h> | |
17 | #include <linux/clkdev.h> | |
18 | #include <linux/acpi.h> | |
19 | #include <linux/err.h> | |
92082a88 KX |
20 | #include <linux/pm.h> |
21 | ||
22 | #include "internal.h" | |
23 | ||
24 | ACPI_MODULE_NAME("acpi_apd"); | |
25 | struct apd_private_data; | |
26 | ||
27 | /** | |
28 | * ACPI_APD_SYSFS : add device attributes in sysfs | |
29 | * ACPI_APD_PM : attach power domain to device | |
30 | */ | |
31 | #define ACPI_APD_SYSFS BIT(0) | |
32 | #define ACPI_APD_PM BIT(1) | |
33 | ||
34 | /** | |
35 | * struct apd_device_desc - a descriptor for apd device | |
36 | * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM | |
37 | * @fixed_clk_rate: fixed rate input clock source for acpi device; | |
38 | * 0 means no fixed rate input clock source | |
39 | * @setup: a hook routine to set device resource during create platform device | |
40 | * | |
41 | * Device description defined as acpi_device_id.driver_data | |
42 | */ | |
43 | struct apd_device_desc { | |
44 | unsigned int flags; | |
45 | unsigned int fixed_clk_rate; | |
7ff55d17 | 46 | struct property_entry *properties; |
92082a88 KX |
47 | int (*setup)(struct apd_private_data *pdata); |
48 | }; | |
49 | ||
50 | struct apd_private_data { | |
51 | struct clk *clk; | |
52 | struct acpi_device *adev; | |
53 | const struct apd_device_desc *dev_desc; | |
54 | }; | |
55 | ||
b790eb20 | 56 | #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64) |
92082a88 KX |
57 | #define APD_ADDR(desc) ((unsigned long)&desc) |
58 | ||
59 | static int acpi_apd_setup(struct apd_private_data *pdata) | |
60 | { | |
61 | const struct apd_device_desc *dev_desc = pdata->dev_desc; | |
62 | struct clk *clk = ERR_PTR(-ENODEV); | |
63 | ||
64 | if (dev_desc->fixed_clk_rate) { | |
65 | clk = clk_register_fixed_rate(&pdata->adev->dev, | |
66 | dev_name(&pdata->adev->dev), | |
cdd9a6b2 | 67 | NULL, 0, dev_desc->fixed_clk_rate); |
92082a88 KX |
68 | clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev)); |
69 | pdata->clk = clk; | |
70 | } | |
71 | ||
72 | return 0; | |
73 | } | |
74 | ||
b790eb20 | 75 | #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE |
3f4ba94e AA |
76 | |
77 | static int misc_check_res(struct acpi_resource *ares, void *data) | |
78 | { | |
79 | struct resource res; | |
80 | ||
81 | return !acpi_dev_resource_memory(ares, &res); | |
82 | } | |
83 | ||
84 | static int st_misc_setup(struct apd_private_data *pdata) | |
85 | { | |
86 | struct acpi_device *adev = pdata->adev; | |
87 | struct platform_device *clkdev; | |
88 | struct st_clk_data *clk_data; | |
89 | struct resource_entry *rentry; | |
90 | struct list_head resource_list; | |
91 | int ret; | |
92 | ||
93 | clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL); | |
94 | if (!clk_data) | |
95 | return -ENOMEM; | |
96 | ||
97 | INIT_LIST_HEAD(&resource_list); | |
98 | ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res, | |
99 | NULL); | |
100 | if (ret < 0) | |
101 | return -ENOENT; | |
102 | ||
103 | list_for_each_entry(rentry, &resource_list, node) { | |
104 | clk_data->base = devm_ioremap(&adev->dev, rentry->res->start, | |
105 | resource_size(rentry->res)); | |
106 | break; | |
107 | } | |
108 | ||
109 | acpi_dev_free_resource_list(&resource_list); | |
110 | ||
111 | clkdev = platform_device_register_data(&adev->dev, "clk-st", | |
112 | PLATFORM_DEVID_NONE, clk_data, | |
113 | sizeof(*clk_data)); | |
114 | return PTR_ERR_OR_ZERO(clkdev); | |
115 | } | |
116 | ||
a217726a | 117 | static const struct apd_device_desc cz_i2c_desc = { |
92082a88 KX |
118 | .setup = acpi_apd_setup, |
119 | .fixed_clk_rate = 133000000, | |
120 | }; | |
121 | ||
4881f0ba NS |
122 | static const struct apd_device_desc wt_i2c_desc = { |
123 | .setup = acpi_apd_setup, | |
124 | .fixed_clk_rate = 150000000, | |
125 | }; | |
126 | ||
7ff55d17 HK |
127 | static struct property_entry uart_properties[] = { |
128 | PROPERTY_ENTRY_U32("reg-io-width", 4), | |
129 | PROPERTY_ENTRY_U32("reg-shift", 2), | |
130 | PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"), | |
131 | { }, | |
132 | }; | |
133 | ||
a217726a | 134 | static const struct apd_device_desc cz_uart_desc = { |
92082a88 KX |
135 | .setup = acpi_apd_setup, |
136 | .fixed_clk_rate = 48000000, | |
7ff55d17 | 137 | .properties = uart_properties, |
92082a88 | 138 | }; |
3f4ba94e AA |
139 | |
140 | static const struct apd_device_desc st_misc_desc = { | |
141 | .setup = st_misc_setup, | |
142 | }; | |
b790eb20 LH |
143 | #endif |
144 | ||
145 | #ifdef CONFIG_ARM64 | |
a217726a | 146 | static const struct apd_device_desc xgene_i2c_desc = { |
b790eb20 LH |
147 | .setup = acpi_apd_setup, |
148 | .fixed_clk_rate = 100000000, | |
149 | }; | |
bd2058dc | 150 | |
a217726a | 151 | static const struct apd_device_desc vulcan_spi_desc = { |
bd2058dc KP |
152 | .setup = acpi_apd_setup, |
153 | .fixed_clk_rate = 133000000, | |
154 | }; | |
6e14cf36 HG |
155 | |
156 | static const struct apd_device_desc hip07_i2c_desc = { | |
157 | .setup = acpi_apd_setup, | |
158 | .fixed_clk_rate = 200000000, | |
159 | }; | |
160 | ||
161 | static const struct apd_device_desc hip08_i2c_desc = { | |
162 | .setup = acpi_apd_setup, | |
163 | .fixed_clk_rate = 250000000, | |
164 | }; | |
1977dbef J |
165 | static const struct apd_device_desc thunderx2_i2c_desc = { |
166 | .setup = acpi_apd_setup, | |
167 | .fixed_clk_rate = 125000000, | |
168 | }; | |
b790eb20 | 169 | #endif |
92082a88 KX |
170 | |
171 | #else | |
172 | ||
173 | #define APD_ADDR(desc) (0UL) | |
174 | ||
175 | #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */ | |
176 | ||
177 | /** | |
178 | * Create platform device during acpi scan attach handle. | |
179 | * Return value > 0 on success of creating device. | |
180 | */ | |
181 | static int acpi_apd_create_device(struct acpi_device *adev, | |
182 | const struct acpi_device_id *id) | |
183 | { | |
184 | const struct apd_device_desc *dev_desc = (void *)id->driver_data; | |
185 | struct apd_private_data *pdata; | |
186 | struct platform_device *pdev; | |
187 | int ret; | |
188 | ||
189 | if (!dev_desc) { | |
1571875b | 190 | pdev = acpi_create_platform_device(adev, NULL); |
92082a88 KX |
191 | return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1; |
192 | } | |
193 | ||
194 | pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); | |
195 | if (!pdata) | |
196 | return -ENOMEM; | |
197 | ||
198 | pdata->adev = adev; | |
199 | pdata->dev_desc = dev_desc; | |
200 | ||
201 | if (dev_desc->setup) { | |
202 | ret = dev_desc->setup(pdata); | |
203 | if (ret) | |
204 | goto err_out; | |
205 | } | |
206 | ||
207 | adev->driver_data = pdata; | |
1571875b | 208 | pdev = acpi_create_platform_device(adev, dev_desc->properties); |
92082a88 KX |
209 | if (!IS_ERR_OR_NULL(pdev)) |
210 | return 1; | |
211 | ||
212 | ret = PTR_ERR(pdev); | |
213 | adev->driver_data = NULL; | |
214 | ||
215 | err_out: | |
216 | kfree(pdata); | |
217 | return ret; | |
218 | } | |
219 | ||
220 | static const struct acpi_device_id acpi_apd_device_ids[] = { | |
221 | /* Generic apd devices */ | |
b790eb20 | 222 | #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE |
92082a88 | 223 | { "AMD0010", APD_ADDR(cz_i2c_desc) }, |
4881f0ba | 224 | { "AMDI0010", APD_ADDR(wt_i2c_desc) }, |
92082a88 | 225 | { "AMD0020", APD_ADDR(cz_uart_desc) }, |
f5eda99e | 226 | { "AMDI0020", APD_ADDR(cz_uart_desc) }, |
92082a88 | 227 | { "AMD0030", }, |
3f4ba94e | 228 | { "AMD0040", APD_ADDR(st_misc_desc)}, |
b790eb20 LH |
229 | #endif |
230 | #ifdef CONFIG_ARM64 | |
231 | { "APMC0D0F", APD_ADDR(xgene_i2c_desc) }, | |
bd2058dc | 232 | { "BRCM900D", APD_ADDR(vulcan_spi_desc) }, |
251831bd | 233 | { "CAV900D", APD_ADDR(vulcan_spi_desc) }, |
1977dbef | 234 | { "CAV9007", APD_ADDR(thunderx2_i2c_desc) }, |
f7f3dd5b HG |
235 | { "HISI02A1", APD_ADDR(hip07_i2c_desc) }, |
236 | { "HISI02A2", APD_ADDR(hip08_i2c_desc) }, | |
b790eb20 | 237 | #endif |
92082a88 KX |
238 | { } |
239 | }; | |
240 | ||
241 | static struct acpi_scan_handler apd_handler = { | |
242 | .ids = acpi_apd_device_ids, | |
243 | .attach = acpi_apd_create_device, | |
244 | }; | |
245 | ||
246 | void __init acpi_apd_init(void) | |
247 | { | |
248 | acpi_scan_add_handler(&apd_handler); | |
249 | } |