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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> | |
14 | #include <linux/platform_device.h> | |
15 | #include <linux/pm_domain.h> | |
16 | #include <linux/clkdev.h> | |
17 | #include <linux/acpi.h> | |
18 | #include <linux/err.h> | |
92082a88 KX |
19 | #include <linux/pm.h> |
20 | ||
21 | #include "internal.h" | |
22 | ||
23 | ACPI_MODULE_NAME("acpi_apd"); | |
24 | struct apd_private_data; | |
25 | ||
26 | /** | |
27 | * ACPI_APD_SYSFS : add device attributes in sysfs | |
28 | * ACPI_APD_PM : attach power domain to device | |
29 | */ | |
30 | #define ACPI_APD_SYSFS BIT(0) | |
31 | #define ACPI_APD_PM BIT(1) | |
32 | ||
33 | /** | |
34 | * struct apd_device_desc - a descriptor for apd device | |
35 | * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM | |
36 | * @fixed_clk_rate: fixed rate input clock source for acpi device; | |
37 | * 0 means no fixed rate input clock source | |
38 | * @setup: a hook routine to set device resource during create platform device | |
39 | * | |
40 | * Device description defined as acpi_device_id.driver_data | |
41 | */ | |
42 | struct apd_device_desc { | |
43 | unsigned int flags; | |
44 | unsigned int fixed_clk_rate; | |
7ff55d17 | 45 | struct property_entry *properties; |
92082a88 KX |
46 | int (*setup)(struct apd_private_data *pdata); |
47 | }; | |
48 | ||
49 | struct apd_private_data { | |
50 | struct clk *clk; | |
51 | struct acpi_device *adev; | |
52 | const struct apd_device_desc *dev_desc; | |
53 | }; | |
54 | ||
b790eb20 | 55 | #if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64) |
92082a88 KX |
56 | #define APD_ADDR(desc) ((unsigned long)&desc) |
57 | ||
58 | static int acpi_apd_setup(struct apd_private_data *pdata) | |
59 | { | |
60 | const struct apd_device_desc *dev_desc = pdata->dev_desc; | |
61 | struct clk *clk = ERR_PTR(-ENODEV); | |
62 | ||
63 | if (dev_desc->fixed_clk_rate) { | |
64 | clk = clk_register_fixed_rate(&pdata->adev->dev, | |
65 | dev_name(&pdata->adev->dev), | |
cdd9a6b2 | 66 | NULL, 0, dev_desc->fixed_clk_rate); |
92082a88 KX |
67 | clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev)); |
68 | pdata->clk = clk; | |
69 | } | |
70 | ||
71 | return 0; | |
72 | } | |
73 | ||
b790eb20 | 74 | #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE |
a217726a | 75 | static const struct apd_device_desc cz_i2c_desc = { |
92082a88 KX |
76 | .setup = acpi_apd_setup, |
77 | .fixed_clk_rate = 133000000, | |
78 | }; | |
79 | ||
4881f0ba NS |
80 | static const struct apd_device_desc wt_i2c_desc = { |
81 | .setup = acpi_apd_setup, | |
82 | .fixed_clk_rate = 150000000, | |
83 | }; | |
84 | ||
7ff55d17 HK |
85 | static struct property_entry uart_properties[] = { |
86 | PROPERTY_ENTRY_U32("reg-io-width", 4), | |
87 | PROPERTY_ENTRY_U32("reg-shift", 2), | |
88 | PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"), | |
89 | { }, | |
90 | }; | |
91 | ||
a217726a | 92 | static const struct apd_device_desc cz_uart_desc = { |
92082a88 KX |
93 | .setup = acpi_apd_setup, |
94 | .fixed_clk_rate = 48000000, | |
7ff55d17 | 95 | .properties = uart_properties, |
92082a88 | 96 | }; |
b790eb20 LH |
97 | #endif |
98 | ||
99 | #ifdef CONFIG_ARM64 | |
a217726a | 100 | static const struct apd_device_desc xgene_i2c_desc = { |
b790eb20 LH |
101 | .setup = acpi_apd_setup, |
102 | .fixed_clk_rate = 100000000, | |
103 | }; | |
bd2058dc | 104 | |
a217726a | 105 | static const struct apd_device_desc vulcan_spi_desc = { |
bd2058dc KP |
106 | .setup = acpi_apd_setup, |
107 | .fixed_clk_rate = 133000000, | |
108 | }; | |
408abcc1 HG |
109 | |
110 | static const struct apd_device_desc hip07_i2c_desc = { | |
111 | .setup = acpi_apd_setup, | |
112 | .fixed_clk_rate = 200000000, | |
113 | }; | |
114 | ||
115 | static const struct apd_device_desc hip08_i2c_desc = { | |
116 | .setup = acpi_apd_setup, | |
117 | .fixed_clk_rate = 250000000, | |
118 | }; | |
b790eb20 | 119 | #endif |
92082a88 KX |
120 | |
121 | #else | |
122 | ||
123 | #define APD_ADDR(desc) (0UL) | |
124 | ||
125 | #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */ | |
126 | ||
127 | /** | |
128 | * Create platform device during acpi scan attach handle. | |
129 | * Return value > 0 on success of creating device. | |
130 | */ | |
131 | static int acpi_apd_create_device(struct acpi_device *adev, | |
132 | const struct acpi_device_id *id) | |
133 | { | |
134 | const struct apd_device_desc *dev_desc = (void *)id->driver_data; | |
135 | struct apd_private_data *pdata; | |
136 | struct platform_device *pdev; | |
137 | int ret; | |
138 | ||
139 | if (!dev_desc) { | |
1571875b | 140 | pdev = acpi_create_platform_device(adev, NULL); |
92082a88 KX |
141 | return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1; |
142 | } | |
143 | ||
144 | pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); | |
145 | if (!pdata) | |
146 | return -ENOMEM; | |
147 | ||
148 | pdata->adev = adev; | |
149 | pdata->dev_desc = dev_desc; | |
150 | ||
151 | if (dev_desc->setup) { | |
152 | ret = dev_desc->setup(pdata); | |
153 | if (ret) | |
154 | goto err_out; | |
155 | } | |
156 | ||
157 | adev->driver_data = pdata; | |
1571875b | 158 | pdev = acpi_create_platform_device(adev, dev_desc->properties); |
92082a88 KX |
159 | if (!IS_ERR_OR_NULL(pdev)) |
160 | return 1; | |
161 | ||
162 | ret = PTR_ERR(pdev); | |
163 | adev->driver_data = NULL; | |
164 | ||
165 | err_out: | |
166 | kfree(pdata); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | static const struct acpi_device_id acpi_apd_device_ids[] = { | |
171 | /* Generic apd devices */ | |
b790eb20 | 172 | #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE |
92082a88 | 173 | { "AMD0010", APD_ADDR(cz_i2c_desc) }, |
4881f0ba | 174 | { "AMDI0010", APD_ADDR(wt_i2c_desc) }, |
92082a88 | 175 | { "AMD0020", APD_ADDR(cz_uart_desc) }, |
f5eda99e | 176 | { "AMDI0020", APD_ADDR(cz_uart_desc) }, |
92082a88 | 177 | { "AMD0030", }, |
b790eb20 LH |
178 | #endif |
179 | #ifdef CONFIG_ARM64 | |
180 | { "APMC0D0F", APD_ADDR(xgene_i2c_desc) }, | |
bd2058dc | 181 | { "BRCM900D", APD_ADDR(vulcan_spi_desc) }, |
188d29ab HG |
182 | { "HISI02A1", APD_ADDR(hip07_i2c_desc) }, |
183 | { "HISI02A2", APD_ADDR(hip08_i2c_desc) }, | |
b790eb20 | 184 | #endif |
92082a88 KX |
185 | { } |
186 | }; | |
187 | ||
188 | static struct acpi_scan_handler apd_handler = { | |
189 | .ids = acpi_apd_device_ids, | |
190 | .attach = acpi_apd_create_device, | |
191 | }; | |
192 | ||
193 | void __init acpi_apd_init(void) | |
194 | { | |
195 | acpi_scan_add_handler(&apd_handler); | |
196 | } |