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/acpi.h>
11 #include <linux/clkdev.h>
12 #include <linux/clk-provider.h>
13 #include <linux/err.h>
15 #include <linux/platform_data/clk-fch.h>
16 #include <linux/platform_device.h>
20 struct apd_private_data;
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
29 * Device description defined as acpi_device_id.driver_data
31 struct apd_device_desc {
32 unsigned int fixed_clk_rate;
33 struct property_entry *properties;
34 int (*setup)(struct apd_private_data *pdata);
37 struct apd_private_data {
39 struct acpi_device *adev;
40 const struct apd_device_desc *dev_desc;
43 #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
44 #define APD_ADDR(desc) ((unsigned long)&desc)
46 static int acpi_apd_setup(struct apd_private_data *pdata)
48 const struct apd_device_desc *dev_desc = pdata->dev_desc;
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));
62 #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
63 static int misc_check_res(struct acpi_resource *ares, void *data)
67 return !acpi_dev_resource_memory(ares, &res);
70 static int fch_misc_setup(struct apd_private_data *pdata)
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;
80 clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
84 INIT_LIST_HEAD(&resource_list);
85 ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
90 if (!acpi_dev_get_property(adev, "clk-name", ACPI_TYPE_STRING, &obj)) {
91 clk_data->name = devm_kzalloc(&adev->dev, obj->string.length,
94 strcpy(clk_data->name, obj->string.pointer);
96 /* Set default name to mclk if entry missing in firmware */
97 clk_data->name = "mclk";
100 list_for_each_entry(rentry, &resource_list, node) {
101 clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
102 resource_size(rentry->res));
106 acpi_dev_free_resource_list(&resource_list);
108 clkdev = platform_device_register_data(&adev->dev, "clk-fch",
109 PLATFORM_DEVID_NONE, clk_data,
111 return PTR_ERR_OR_ZERO(clkdev);
114 static const struct apd_device_desc cz_i2c_desc = {
115 .setup = acpi_apd_setup,
116 .fixed_clk_rate = 133000000,
119 static const struct apd_device_desc wt_i2c_desc = {
120 .setup = acpi_apd_setup,
121 .fixed_clk_rate = 150000000,
124 static struct property_entry uart_properties[] = {
125 PROPERTY_ENTRY_U32("reg-io-width", 4),
126 PROPERTY_ENTRY_U32("reg-shift", 2),
127 PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
131 static const struct apd_device_desc cz_uart_desc = {
132 .setup = acpi_apd_setup,
133 .fixed_clk_rate = 48000000,
134 .properties = uart_properties,
137 static const struct apd_device_desc fch_misc_desc = {
138 .setup = fch_misc_setup,
140 #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */
143 static const struct apd_device_desc xgene_i2c_desc = {
144 .setup = acpi_apd_setup,
145 .fixed_clk_rate = 100000000,
148 static const struct apd_device_desc vulcan_spi_desc = {
149 .setup = acpi_apd_setup,
150 .fixed_clk_rate = 133000000,
153 static const struct apd_device_desc hip07_i2c_desc = {
154 .setup = acpi_apd_setup,
155 .fixed_clk_rate = 200000000,
158 static const struct apd_device_desc hip08_i2c_desc = {
159 .setup = acpi_apd_setup,
160 .fixed_clk_rate = 250000000,
163 static const struct apd_device_desc hip08_lite_i2c_desc = {
164 .setup = acpi_apd_setup,
165 .fixed_clk_rate = 125000000,
168 static const struct apd_device_desc thunderx2_i2c_desc = {
169 .setup = acpi_apd_setup,
170 .fixed_clk_rate = 125000000,
173 static const struct apd_device_desc nxp_i2c_desc = {
174 .setup = acpi_apd_setup,
175 .fixed_clk_rate = 350000000,
178 static const struct apd_device_desc hip08_spi_desc = {
179 .setup = acpi_apd_setup,
180 .fixed_clk_rate = 250000000,
182 #endif /* CONFIG_ARM64 */
187 * Create platform device during acpi scan attach handle.
188 * Return value > 0 on success of creating device.
190 static int acpi_apd_create_device(struct acpi_device *adev,
191 const struct acpi_device_id *id)
193 const struct apd_device_desc *dev_desc = (void *)id->driver_data;
194 struct apd_private_data *pdata;
195 struct platform_device *pdev;
199 pdev = acpi_create_platform_device(adev, NULL);
200 return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
203 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
208 pdata->dev_desc = dev_desc;
210 if (dev_desc->setup) {
211 ret = dev_desc->setup(pdata);
216 adev->driver_data = pdata;
217 pdev = acpi_create_platform_device(adev, dev_desc->properties);
218 if (!IS_ERR_OR_NULL(pdev))
222 adev->driver_data = NULL;
229 static const struct acpi_device_id acpi_apd_device_ids[] = {
230 /* Generic apd devices */
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 { "AMDI0022", APD_ADDR(cz_uart_desc) },
238 { "AMD0040", APD_ADDR(fch_misc_desc)},
239 { "HYGO0010", APD_ADDR(wt_i2c_desc) },
242 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
243 { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
244 { "CAV900D", APD_ADDR(vulcan_spi_desc) },
245 { "CAV9007", APD_ADDR(thunderx2_i2c_desc) },
246 { "HISI02A1", APD_ADDR(hip07_i2c_desc) },
247 { "HISI02A2", APD_ADDR(hip08_i2c_desc) },
248 { "HISI02A3", APD_ADDR(hip08_lite_i2c_desc) },
249 { "HISI0173", APD_ADDR(hip08_spi_desc) },
250 { "NXP0001", APD_ADDR(nxp_i2c_desc) },
255 static struct acpi_scan_handler apd_handler = {
256 .ids = acpi_apd_device_ids,
257 .attach = acpi_apd_create_device,
260 void __init acpi_apd_init(void)
262 acpi_scan_add_handler(&apd_handler);