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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 | ||
7ff55d17 HK |
80 | static struct property_entry uart_properties[] = { |
81 | PROPERTY_ENTRY_U32("reg-io-width", 4), | |
82 | PROPERTY_ENTRY_U32("reg-shift", 2), | |
83 | PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"), | |
84 | { }, | |
85 | }; | |
86 | ||
a217726a | 87 | static const struct apd_device_desc cz_uart_desc = { |
92082a88 KX |
88 | .setup = acpi_apd_setup, |
89 | .fixed_clk_rate = 48000000, | |
7ff55d17 | 90 | .properties = uart_properties, |
92082a88 | 91 | }; |
b790eb20 LH |
92 | #endif |
93 | ||
94 | #ifdef CONFIG_ARM64 | |
a217726a | 95 | static const struct apd_device_desc xgene_i2c_desc = { |
b790eb20 LH |
96 | .setup = acpi_apd_setup, |
97 | .fixed_clk_rate = 100000000, | |
98 | }; | |
bd2058dc | 99 | |
a217726a | 100 | static const struct apd_device_desc vulcan_spi_desc = { |
bd2058dc KP |
101 | .setup = acpi_apd_setup, |
102 | .fixed_clk_rate = 133000000, | |
103 | }; | |
b790eb20 | 104 | #endif |
92082a88 KX |
105 | |
106 | #else | |
107 | ||
108 | #define APD_ADDR(desc) (0UL) | |
109 | ||
110 | #endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */ | |
111 | ||
112 | /** | |
113 | * Create platform device during acpi scan attach handle. | |
114 | * Return value > 0 on success of creating device. | |
115 | */ | |
116 | static int acpi_apd_create_device(struct acpi_device *adev, | |
117 | const struct acpi_device_id *id) | |
118 | { | |
119 | const struct apd_device_desc *dev_desc = (void *)id->driver_data; | |
120 | struct apd_private_data *pdata; | |
121 | struct platform_device *pdev; | |
122 | int ret; | |
123 | ||
124 | if (!dev_desc) { | |
125 | pdev = acpi_create_platform_device(adev); | |
126 | return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1; | |
127 | } | |
128 | ||
129 | pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); | |
130 | if (!pdata) | |
131 | return -ENOMEM; | |
132 | ||
133 | pdata->adev = adev; | |
134 | pdata->dev_desc = dev_desc; | |
135 | ||
136 | if (dev_desc->setup) { | |
137 | ret = dev_desc->setup(pdata); | |
138 | if (ret) | |
139 | goto err_out; | |
140 | } | |
141 | ||
7ff55d17 HK |
142 | if (dev_desc->properties) { |
143 | ret = device_add_properties(&adev->dev, dev_desc->properties); | |
144 | if (ret) | |
145 | goto err_out; | |
146 | } | |
147 | ||
92082a88 KX |
148 | adev->driver_data = pdata; |
149 | pdev = acpi_create_platform_device(adev); | |
150 | if (!IS_ERR_OR_NULL(pdev)) | |
151 | return 1; | |
152 | ||
153 | ret = PTR_ERR(pdev); | |
154 | adev->driver_data = NULL; | |
155 | ||
156 | err_out: | |
157 | kfree(pdata); | |
158 | return ret; | |
159 | } | |
160 | ||
161 | static const struct acpi_device_id acpi_apd_device_ids[] = { | |
162 | /* Generic apd devices */ | |
b790eb20 | 163 | #ifdef CONFIG_X86_AMD_PLATFORM_DEVICE |
92082a88 | 164 | { "AMD0010", APD_ADDR(cz_i2c_desc) }, |
e4e666ba | 165 | { "AMDI0010", APD_ADDR(cz_i2c_desc) }, |
92082a88 | 166 | { "AMD0020", APD_ADDR(cz_uart_desc) }, |
f5eda99e | 167 | { "AMDI0020", APD_ADDR(cz_uart_desc) }, |
92082a88 | 168 | { "AMD0030", }, |
b790eb20 LH |
169 | #endif |
170 | #ifdef CONFIG_ARM64 | |
171 | { "APMC0D0F", APD_ADDR(xgene_i2c_desc) }, | |
bd2058dc | 172 | { "BRCM900D", APD_ADDR(vulcan_spi_desc) }, |
b790eb20 | 173 | #endif |
92082a88 KX |
174 | { } |
175 | }; | |
176 | ||
177 | static struct acpi_scan_handler apd_handler = { | |
178 | .ids = acpi_apd_device_ids, | |
179 | .attach = acpi_apd_create_device, | |
180 | }; | |
181 | ||
182 | void __init acpi_apd_init(void) | |
183 | { | |
184 | acpi_scan_add_handler(&apd_handler); | |
185 | } |