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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
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29
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
63static 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
70static 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
107static const struct apd_device_desc cz_i2c_desc = {
108 .setup = acpi_apd_setup,
109 .fixed_clk_rate = 133000000,
110};
111
112static const struct apd_device_desc wt_i2c_desc = {
113 .setup = acpi_apd_setup,
114 .fixed_clk_rate = 150000000,
115};
116
117static 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
124static const struct apd_device_desc cz_uart_desc = {
125 .setup = acpi_apd_setup,
126 .fixed_clk_rate = 48000000,
127 .properties = uart_properties,
128};
129
130static const struct apd_device_desc fch_misc_desc = {
131 .setup = fch_misc_setup,
132};
133#endif
134
135#ifdef CONFIG_ARM64
136static const struct apd_device_desc xgene_i2c_desc = {
137 .setup = acpi_apd_setup,
138 .fixed_clk_rate = 100000000,
139};
140
141static const struct apd_device_desc vulcan_spi_desc = {
142 .setup = acpi_apd_setup,
143 .fixed_clk_rate = 133000000,
144};
145
146static const struct apd_device_desc hip07_i2c_desc = {
147 .setup = acpi_apd_setup,
148 .fixed_clk_rate = 200000000,
149};
150
151static const struct apd_device_desc hip08_i2c_desc = {
152 .setup = acpi_apd_setup,
153 .fixed_clk_rate = 250000000,
154};
155
156static const struct apd_device_desc hip08_lite_i2c_desc = {
157 .setup = acpi_apd_setup,
158 .fixed_clk_rate = 125000000,
159};
160
161static const struct apd_device_desc thunderx2_i2c_desc = {
162 .setup = acpi_apd_setup,
163 .fixed_clk_rate = 125000000,
164};
165
166static const struct apd_device_desc nxp_i2c_desc = {
167 .setup = acpi_apd_setup,
168 .fixed_clk_rate = 350000000,
169};
170
171static const struct apd_device_desc hip08_spi_desc = {
172 .setup = acpi_apd_setup,
173 .fixed_clk_rate = 250000000,
174};
175#endif
176
177#endif
178
179
180
181
182
183static 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
222static const struct acpi_device_id acpi_apd_device_ids[] = {
223
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
247static struct acpi_scan_handler apd_handler = {
248 .ids = acpi_apd_device_ids,
249 .attach = acpi_apd_create_device,
250};
251
252void __init acpi_apd_init(void)
253{
254 acpi_scan_add_handler(&apd_handler);
255}
256
