summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpi_apd.c
blob: ddf598ae8b6b4c311683d3da5159d66214ed31c2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
/*
 * AMD ACPI support for ACPI2platform device.
 *
 * Copyright (c) 2014,2015 AMD Corporation.
 * Authors: Ken Xue <Ken.Xue@amd.com>
 *	Wu, Jeff <Jeff.Wu@amd.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/clk-provider.h>
#include <linux/platform_data/clk-st.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/clkdev.h>
#include <linux/acpi.h>
#include <linux/err.h>
#include <linux/pm.h>

#include "internal.h"

ACPI_MODULE_NAME("acpi_apd");
struct apd_private_data;

/**
 * ACPI_APD_SYSFS : add device attributes in sysfs
 * ACPI_APD_PM : attach power domain to device
 */
#define ACPI_APD_SYSFS	BIT(0)
#define ACPI_APD_PM	BIT(1)

/**
 * struct apd_device_desc - a descriptor for apd device
 * @flags: device flags like %ACPI_APD_SYSFS, %ACPI_APD_PM
 * @fixed_clk_rate: fixed rate input clock source for acpi device;
 *			0 means no fixed rate input clock source
 * @setup: a hook routine to set device resource during create platform device
 *
 * Device description defined as acpi_device_id.driver_data
 */
struct apd_device_desc {
	unsigned int flags;
	unsigned int fixed_clk_rate;
	struct property_entry *properties;
	int (*setup)(struct apd_private_data *pdata);
};

struct apd_private_data {
	struct clk *clk;
	struct acpi_device *adev;
	const struct apd_device_desc *dev_desc;
};

#if defined(CONFIG_X86_AMD_PLATFORM_DEVICE) || defined(CONFIG_ARM64)
#define APD_ADDR(desc)	((unsigned long)&desc)

static int acpi_apd_setup(struct apd_private_data *pdata)
{
	const struct apd_device_desc *dev_desc = pdata->dev_desc;
	struct clk *clk = ERR_PTR(-ENODEV);

	if (dev_desc->fixed_clk_rate) {
		clk = clk_register_fixed_rate(&pdata->adev->dev,
					dev_name(&pdata->adev->dev),
					NULL, 0, dev_desc->fixed_clk_rate);
		clk_register_clkdev(clk, NULL, dev_name(&pdata->adev->dev));
		pdata->clk = clk;
	}

	return 0;
}

#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE

static int misc_check_res(struct acpi_resource *ares, void *data)
{
	struct resource res;

	return !acpi_dev_resource_memory(ares, &res);
}

static int st_misc_setup(struct apd_private_data *pdata)
{
	struct acpi_device *adev = pdata->adev;
	struct platform_device *clkdev;
	struct st_clk_data *clk_data;
	struct resource_entry *rentry;
	struct list_head resource_list;
	int ret;

	clk_data = devm_kzalloc(&adev->dev, sizeof(*clk_data), GFP_KERNEL);
	if (!clk_data)
		return -ENOMEM;

	INIT_LIST_HEAD(&resource_list);
	ret = acpi_dev_get_resources(adev, &resource_list, misc_check_res,
				     NULL);
	if (ret < 0)
		return -ENOENT;

	list_for_each_entry(rentry, &resource_list, node) {
		clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
					      resource_size(rentry->res));
		break;
	}

	acpi_dev_free_resource_list(&resource_list);

	clkdev = platform_device_register_data(&adev->dev, "clk-st",
					       PLATFORM_DEVID_NONE, clk_data,
					       sizeof(*clk_data));
	return PTR_ERR_OR_ZERO(clkdev);
}

static const struct apd_device_desc cz_i2c_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 133000000,
};

static const struct apd_device_desc wt_i2c_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 150000000,
};

static struct property_entry uart_properties[] = {
	PROPERTY_ENTRY_U32("reg-io-width", 4),
	PROPERTY_ENTRY_U32("reg-shift", 2),
	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
	{ },
};

static const struct apd_device_desc cz_uart_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 48000000,
	.properties = uart_properties,
};

static const struct apd_device_desc st_misc_desc = {
	.setup = st_misc_setup,
};
#endif

#ifdef CONFIG_ARM64
static const struct apd_device_desc xgene_i2c_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 100000000,
};

static const struct apd_device_desc vulcan_spi_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 133000000,
};

static const struct apd_device_desc hip07_i2c_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 200000000,
};

static const struct apd_device_desc hip08_i2c_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 250000000,
};
static const struct apd_device_desc thunderx2_i2c_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 125000000,
};

static const struct apd_device_desc hip08_spi_desc = {
	.setup = acpi_apd_setup,
	.fixed_clk_rate = 250000000,
};
#endif

#else

#define APD_ADDR(desc) (0UL)

#endif /* CONFIG_X86_AMD_PLATFORM_DEVICE */

/**
* Create platform device during acpi scan attach handle.
* Return value > 0 on success of creating device.
*/
static int acpi_apd_create_device(struct acpi_device *adev,
				   const struct acpi_device_id *id)
{
	const struct apd_device_desc *dev_desc = (void *)id->driver_data;
	struct apd_private_data *pdata;
	struct platform_device *pdev;
	int ret;

	if (!dev_desc) {
		pdev = acpi_create_platform_device(adev, NULL);
		return IS_ERR_OR_NULL(pdev) ? PTR_ERR(pdev) : 1;
	}

	pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return -ENOMEM;

	pdata->adev = adev;
	pdata->dev_desc = dev_desc;

	if (dev_desc->setup) {
		ret = dev_desc->setup(pdata);
		if (ret)
			goto err_out;
	}

	adev->driver_data = pdata;
	pdev = acpi_create_platform_device(adev, dev_desc->properties);
	if (!IS_ERR_OR_NULL(pdev))
		return 1;

	ret = PTR_ERR(pdev);
	adev->driver_data = NULL;

 err_out:
	kfree(pdata);
	return ret;
}

static const struct acpi_device_id acpi_apd_device_ids[] = {
	/* Generic apd devices */
#ifdef CONFIG_X86_AMD_PLATFORM_DEVICE
	{ "AMD0010", APD_ADDR(cz_i2c_desc) },
	{ "AMDI0010", APD_ADDR(wt_i2c_desc) },
	{ "AMD0020", APD_ADDR(cz_uart_desc) },
	{ "AMDI0020", APD_ADDR(cz_uart_desc) },
	{ "AMD0030", },
	{ "AMD0040", APD_ADDR(st_misc_desc)},
#endif
#ifdef CONFIG_ARM64
	{ "APMC0D0F", APD_ADDR(xgene_i2c_desc) },
	{ "BRCM900D", APD_ADDR(vulcan_spi_desc) },
	{ "CAV900D",  APD_ADDR(vulcan_spi_desc) },
	{ "CAV9007",  APD_ADDR(thunderx2_i2c_desc) },
	{ "HISI02A1", APD_ADDR(hip07_i2c_desc) },
	{ "HISI02A2", APD_ADDR(hip08_i2c_desc) },
	{ "HISI0173", APD_ADDR(hip08_spi_desc) },
#endif
	{ }
};

static struct acpi_scan_handler apd_handler = {
	.ids = acpi_apd_device_ids,
	.attach = acpi_apd_create_device,
};

void __init acpi_apd_init(void)
{
	acpi_scan_add_handler(&apd_handler);
}