1 // SPDX-License-Identifier: GPL-2.0-only
3 * AMD ACPI support for ACPI2platform device.
5 * Copyright (c) 2014,2015 AMD Corporation.
6 * Authors: Ken Xue <Ken.Xue@amd.com>
7 * Wu, Jeff <Jeff.Wu@amd.com>
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>
22 ACPI_MODULE_NAME("acpi_apd");
23 struct apd_private_data;
26 * ACPI_APD_SYSFS : add device attributes in sysfs
27 * ACPI_APD_PM : attach power domain to device
29 #define ACPI_APD_SYSFS BIT(0)
30 #define ACPI_APD_PM BIT(1)
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
39 * Device description defined as acpi_device_id.driver_data
41 struct apd_device_desc {
43 unsigned int fixed_clk_rate;
44 struct property_entry *properties;
45 int (*setup)(struct apd_private_data *pdata);
48 struct apd_private_data {
50 struct acpi_device *adev;
51 const struct apd_device_desc *dev_desc;
54 #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
55 #define APD_ADDR(desc) ((unsigned long)&desc)
57 static int acpi_apd_setup(struct apd_private_data *pdata)
59 const struct apd_device_desc *dev_desc = pdata->dev_desc;
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));
73 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
75 static int misc_check_res(struct acpi_resource *ares, void *data)
79 return !acpi_dev_resource_memory(ares, &res);
82 static int fch_misc_setup(struct apd_private_data *pdata)
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;
92 clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
96 INIT_LIST_HEAD(&resource_list);
97 ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
102 if (!acpi_dev_get_property(adev, "is-rv", ACPI_TYPE_INTEGER, &obj))
103 clk_data->is_rv = obj->integer.value;
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));
111 acpi_dev_free_resource_list(&resource_list);
113 clkdev = platform_device_register_data(&adev->dev, "clk-fch",
114 PLATFORM_DEVID_NONE, clk_data,
116 return PTR_ERR_OR_ZERO(clkdev);
119 static const struct apd_device_desc cz_i2c_desc = {
120 .setup = acpi_apd_setup,
121 .fixed_clk_rate = 133000000,
124 static const struct apd_device_desc wt_i2c_desc = {
125 .setup = acpi_apd_setup,
126 .fixed_clk_rate = 150000000,
129 static 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"),
136 static const struct apd_device_desc cz_uart_desc = {
137 .setup = acpi_apd_setup,
138 .fixed_clk_rate = 48000000,
139 .properties = uart_properties,
142 static const struct apd_device_desc fch_misc_desc = {
143 .setup = fch_misc_setup,
148 static const struct apd_device_desc xgene_i2c_desc = {
149 .setup = acpi_apd_setup,
150 .fixed_clk_rate = 100000000,
153 static const struct apd_device_desc vulcan_spi_desc = {
154 .setup = acpi_apd_setup,
155 .fixed_clk_rate = 133000000,
158 static const struct apd_device_desc hip07_i2c_desc = {
159 .setup = acpi_apd_setup,
160 .fixed_clk_rate = 200000000,
163 static const struct apd_device_desc hip08_i2c_desc = {
164 .setup = acpi_apd_setup,
165 .fixed_clk_rate = 250000000,
168 static const struct apd_device_desc hip08_lite_i2c_desc = {
169 .setup = acpi_apd_setup,
170 .fixed_clk_rate = 125000000,
173 static const struct apd_device_desc thunderx2_i2c_desc = {
174 .setup = acpi_apd_setup,
175 .fixed_clk_rate = 125000000,
178 static const struct apd_device_desc nxp_i2c_desc = {
179 .setup = acpi_apd_setup,
180 .fixed_clk_rate = 350000000,
183 static const struct apd_device_desc hip08_spi_desc = {
184 .setup = acpi_apd_setup,
185 .fixed_clk_rate = 250000000,
191 #define APD_ADDR(desc) (0UL)
193 #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
196 * Create platform device during acpi scan attach handle.
197 * Return value > 0 on success of creating device.
199 static int acpi_apd_create_device(struct acpi_device *adev,
200 const struct acpi_device_id *id)
202 const struct apd_device_desc *dev_desc = (void *)id->driver_data;
203 struct apd_private_data *pdata;
204 struct platform_device *pdev;
208 pdev = acpi_create_platform_device(adev, NULL);
209 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
212 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
217 pdata->dev_desc = dev_desc;
219 if (dev_desc->setup) {
220 ret = dev_desc->setup(pdata);
225 adev->driver_data = pdata;
226 pdev = acpi_create_platform_device(adev, dev_desc->properties);
227 if (!IS_ERR_OR_NULL(pdev))
231 adev->driver_data = NULL;
238 static 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) },
246 { "AMD0040", APD_ADDR(fch_misc_desc)},
247 { "HYGO0010", APD_ADDR(wt_i2c_desc) },
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) },
263 static struct acpi_scan_handler apd_handler = {
264 .ids = acpi_apd_device_ids,
265 .attach = acpi_apd_create_device,
268 void __init acpi_apd_init(void)
270 acpi_scan_add_handler(&apd_handler);