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Ken Xue92082a82015-02-06 08:27:51 +08001/*
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>
Ken Xue92082a82015-02-06 08:27:51 +080019#include <linux/pm.h>
20
21#include "internal.h"
22
23ACPI_MODULE_NAME("acpi_apd");
24struct 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 */
42struct apd_device_desc {
43 unsigned int flags;
44 unsigned int fixed_clk_rate;
Heikki Krogerus7ff55d172016-08-23 11:33:26 +030045 struct property_entry *properties;
Ken Xue92082a82015-02-06 08:27:51 +080046 int (*setup)(struct apd_private_data *pdata);
47};
48
49struct apd_private_data {
50 struct clk *clk;
51 struct acpi_device *adev;
52 const struct apd_device_desc *dev_desc;
53};
54
Loc Hob790eb22015-12-10 14:19:16 -070055#if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
Ken Xue92082a82015-02-06 08:27:51 +080056#define APD_ADDR(desc) ((unsigned long)&desc)
57
58static 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),
Stephen Boydcdd9a6b2016-04-19 18:27:46 -070066 NULL, 0, dev_desc->fixed_clk_rate);
Ken Xue92082a82015-02-06 08:27:51 +080067 clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
68 pdata->clk = clk;
69 }
70
71 return 0;
72}
73
Loc Hob790eb22015-12-10 14:19:16 -070074#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
Julia Lawalla2177262016-09-11 15:06:06 +020075static const struct apd_device_desc cz_i2c_desc = {
Ken Xue92082a82015-02-06 08:27:51 +080076 .setup = acpi_apd_setup,
77 .fixed_clk_rate = 133000000,
78};
79
Heikki Krogerus7ff55d172016-08-23 11:33:26 +030080static 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
Julia Lawalla2177262016-09-11 15:06:06 +020087static const struct apd_device_desc cz_uart_desc = {
Ken Xue92082a82015-02-06 08:27:51 +080088 .setup = acpi_apd_setup,
89 .fixed_clk_rate = 48000000,
Heikki Krogerus7ff55d172016-08-23 11:33:26 +030090 .properties = uart_properties,
Ken Xue92082a82015-02-06 08:27:51 +080091};
Loc Hob790eb22015-12-10 14:19:16 -070092#endif
93
94#ifdef CONFIG_ARM64
Julia Lawalla2177262016-09-11 15:06:06 +020095static const struct apd_device_desc xgene_i2c_desc = {
Loc Hob790eb22015-12-10 14:19:16 -070096 .setup = acpi_apd_setup,
97 .fixed_clk_rate = 100000000,
98};
Kamlakant Patelbd2058d2016-08-09 19:35:21 +053099
Julia Lawalla2177262016-09-11 15:06:06 +0200100static const struct apd_device_desc vulcan_spi_desc = {
Kamlakant Patelbd2058d2016-08-09 19:35:21 +0530101 .setup = acpi_apd_setup,
102 .fixed_clk_rate = 133000000,
103};
Loc Hob790eb22015-12-10 14:19:16 -0700104#endif
Ken Xue92082a82015-02-06 08:27:51 +0800105
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*/
116static 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
Heikki Krogerus7ff55d172016-08-23 11:33:26 +0300142 if (dev_desc->properties) {
143 ret = device_add_properties(&adev->dev, dev_desc->properties);
144 if (ret)
145 goto err_out;
146 }
147
Ken Xue92082a82015-02-06 08:27:51 +0800148 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
161static const struct acpi_device_id acpi_apd_device_ids[] = {
162 /* Generic apd devices */
Loc Hob790eb22015-12-10 14:19:16 -0700163#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
Ken Xue92082a82015-02-06 08:27:51 +0800164 { "AMD0010", APD_ADDR(cz_i2c_desc) },
Xiangliang Yue4e666b2016-03-10 19:34:52 +0800165 { "AMDI0010", APD_ADDR(cz_i2c_desc) },
Ken Xue92082a82015-02-06 08:27:51 +0800166 { "AMD0020", APD_ADDR(cz_uart_desc) },
Wang Hongchengf5eda992016-03-11 17:28:23 +0800167 { "AMDI0020", APD_ADDR(cz_uart_desc) },
Ken Xue92082a82015-02-06 08:27:51 +0800168 { "AMD0030", },
Loc Hob790eb22015-12-10 14:19:16 -0700169#endif
170#ifdef CONFIG_ARM64
171 { "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
Kamlakant Patelbd2058d2016-08-09 19:35:21 +0530172 { "BRCM900D", APD_ADDR(vulcan_spi_desc) },
Loc Hob790eb22015-12-10 14:19:16 -0700173#endif
Ken Xue92082a82015-02-06 08:27:51 +0800174 { }
175};
176
177static struct acpi_scan_handler apd_handler = {
178 .ids = acpi_apd_device_ids,
179 .attach = acpi_apd_create_device,
180};
181
182void __init acpi_apd_init(void)
183{
184 acpi_scan_add_handler(&apd_handler);
185}