This source file includes following definitions.
- acpi_apd_setup
- misc_check_res
- st_misc_setup
- acpi_apd_create_device
- acpi_apd_init
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10 #include <linux/clk-provider.h>
11 #include <linux/platform_data/clk-st.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
22 ACPI_MODULE_NAME("acpi_apd");
23 struct apd_private_data;
24
25
26
27
28
29 #define ACPI_APD_SYSFS BIT(0)
30 #define ACPI_APD_PM BIT(1)
31
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39
40
41 struct 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
48 struct 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
57 static 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
75 static 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
82 static int st_misc_setup(struct apd_private_data *pdata)
83 {
84 struct acpi_device *adev = pdata->adev;
85 struct platform_device *clkdev;
86 struct st_clk_data *clk_data;
87 struct resource_entry *rentry;
88 struct list_head resource_list;
89 int ret;
90
91 clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
92 if (!clk_data)
93 return -ENOMEM;
94
95 INIT_LIST_HEAD(&resource_list);
96 ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
97 NULL);
98 if (ret < 0)
99 return -ENOENT;
100
101 list_for_each_entry(rentry, &resource_list, node) {
102 clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
103 resource_size(rentry->res));
104 break;
105 }
106
107 acpi_dev_free_resource_list(&resource_list);
108
109 clkdev = platform_device_register_data(&adev->dev, "clk-st",
110 PLATFORM_DEVID_NONE, clk_data,
111 sizeof(*clk_data));
112 return PTR_ERR_OR_ZERO(clkdev);
113 }
114
115 static const struct apd_device_desc cz_i2c_desc = {
116 .setup = acpi_apd_setup,
117 .fixed_clk_rate = 133000000,
118 };
119
120 static const struct apd_device_desc wt_i2c_desc = {
121 .setup = acpi_apd_setup,
122 .fixed_clk_rate = 150000000,
123 };
124
125 static struct property_entry uart_properties[] = {
126 PROPERTY_ENTRY_U32("reg-io-width", 4),
127 PROPERTY_ENTRY_U32("reg-shift", 2),
128 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
129 { },
130 };
131
132 static const struct apd_device_desc cz_uart_desc = {
133 .setup = acpi_apd_setup,
134 .fixed_clk_rate = 48000000,
135 .properties = uart_properties,
136 };
137
138 static const struct apd_device_desc st_misc_desc = {
139 .setup = st_misc_setup,
140 };
141 #endif
142
143 #ifdef CONFIG_ARM64
144 static const struct apd_device_desc xgene_i2c_desc = {
145 .setup = acpi_apd_setup,
146 .fixed_clk_rate = 100000000,
147 };
148
149 static const struct apd_device_desc vulcan_spi_desc = {
150 .setup = acpi_apd_setup,
151 .fixed_clk_rate = 133000000,
152 };
153
154 static const struct apd_device_desc hip07_i2c_desc = {
155 .setup = acpi_apd_setup,
156 .fixed_clk_rate = 200000000,
157 };
158
159 static const struct apd_device_desc hip08_i2c_desc = {
160 .setup = acpi_apd_setup,
161 .fixed_clk_rate = 250000000,
162 };
163
164 static const struct apd_device_desc thunderx2_i2c_desc = {
165 .setup = acpi_apd_setup,
166 .fixed_clk_rate = 125000000,
167 };
168
169 static const struct apd_device_desc nxp_i2c_desc = {
170 .setup = acpi_apd_setup,
171 .fixed_clk_rate = 350000000,
172 };
173
174 static const struct apd_device_desc hip08_spi_desc = {
175 .setup = acpi_apd_setup,
176 .fixed_clk_rate = 250000000,
177 };
178 #endif
179
180 #else
181
182 #define APD_ADDR(desc) (0UL)
183
184 #endif
185
186
187
188
189
190 static int acpi_apd_create_device(struct acpi_device *adev,
191 const struct acpi_device_id *id)
192 {
193 const struct apd_device_desc *dev_desc = (void *)id->driver_data;
194 struct apd_private_data *pdata;
195 struct platform_device *pdev;
196 int ret;
197
198 if (!dev_desc) {
199 pdev = acpi_create_platform_device(adev, NULL);
200 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
201 }
202
203 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
204 if (!pdata)
205 return -ENOMEM;
206
207 pdata->adev = adev;
208 pdata->dev_desc = dev_desc;
209
210 if (dev_desc->setup) {
211 ret = dev_desc->setup(pdata);
212 if (ret)
213 goto err_out;
214 }
215
216 adev->driver_data = pdata;
217 pdev = acpi_create_platform_device(adev, dev_desc->properties);
218 if (!IS_ERR_OR_NULL(pdev))
219 return 1;
220
221 ret = PTR_ERR(pdev);
222 adev->driver_data = NULL;
223
224 err_out:
225 kfree(pdata);
226 return ret;
227 }
228
229 static const struct acpi_device_id acpi_apd_device_ids[] = {
230
231 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
232 { "AMD0010", APD_ADDR(cz_i2c_desc) },
233 { "AMDI0010", APD_ADDR(wt_i2c_desc) },
234 { "AMD0020", APD_ADDR(cz_uart_desc) },
235 { "AMDI0020", APD_ADDR(cz_uart_desc) },
236 { "AMD0030", },
237 { "AMD0040", APD_ADDR(st_misc_desc)},
238 #endif
239 #ifdef CONFIG_ARM64
240 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
241 { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
242 { "CAV900D", APD_ADDR(vulcan_spi_desc) },
243 { "CAV9007", APD_ADDR(thunderx2_i2c_desc) },
244 { "HISI02A1", APD_ADDR(hip07_i2c_desc) },
245 { "HISI02A2", APD_ADDR(hip08_i2c_desc) },
246 { "HISI0173", APD_ADDR(hip08_spi_desc) },
247 { "NXP0001", APD_ADDR(nxp_i2c_desc) },
248 #endif
249 { }
250 };
251
252 static struct acpi_scan_handler apd_handler = {
253 .ids = acpi_apd_device_ids,
254 .attach = acpi_apd_create_device,
255 };
256
257 void __init acpi_apd_init(void)
258 {
259 acpi_scan_add_handler(&apd_handler);
260 }