1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Intel LPSS ACPI support.
4 *
5 * Copyright (C) 2015, Intel Corporation
6 *
7 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
8 *          Mika Westerberg <mika.westerberg@linux.intel.com>
9 */
10
11#include <linux/acpi.h>
12#include <linux/ioport.h>
13#include <linux/kernel.h>
14#include <linux/module.h>
15#include <linux/pm_runtime.h>
16#include <linux/platform_device.h>
17#include <linux/property.h>
18#include <linux/pxa2xx_ssp.h>
19
20#include "intel-lpss.h"
21
22static const struct property_entry spt_spi_properties[] = {
23	PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
24	{ }
25};
26
27static const struct software_node spt_spi_node = {
28	.properties = spt_spi_properties,
29};
30
31static const struct intel_lpss_platform_info spt_info = {
32	.clk_rate = 120000000,
33	.swnode = &spt_spi_node,
34};
35
36static const struct property_entry spt_i2c_properties[] = {
37	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
38	{ },
39};
40
41static const struct software_node spt_i2c_node = {
42	.properties = spt_i2c_properties,
43};
44
45static const struct intel_lpss_platform_info spt_i2c_info = {
46	.clk_rate = 120000000,
47	.swnode = &spt_i2c_node,
48};
49
50static const struct property_entry uart_properties[] = {
51	PROPERTY_ENTRY_U32("reg-io-width", 4),
52	PROPERTY_ENTRY_U32("reg-shift", 2),
53	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
54	{ },
55};
56
57static const struct software_node uart_node = {
58	.properties = uart_properties,
59};
60
61static const struct intel_lpss_platform_info spt_uart_info = {
62	.clk_rate = 120000000,
63	.clk_con_id = "baudclk",
64	.swnode = &uart_node,
65};
66
67static const struct property_entry bxt_spi_properties[] = {
68	PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
69	{ }
70};
71
72static const struct software_node bxt_spi_node = {
73	.properties = bxt_spi_properties,
74};
75
76static const struct intel_lpss_platform_info bxt_info = {
77	.clk_rate = 100000000,
78	.swnode = &bxt_spi_node,
79};
80
81static const struct property_entry bxt_i2c_properties[] = {
82	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
83	PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
84	PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
85	{ },
86};
87
88static const struct software_node bxt_i2c_node = {
89	.properties = bxt_i2c_properties,
90};
91
92static const struct intel_lpss_platform_info bxt_i2c_info = {
93	.clk_rate = 133000000,
94	.swnode = &bxt_i2c_node,
95};
96
97static const struct property_entry apl_i2c_properties[] = {
98	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
99	PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
100	PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
101	{ },
102};
103
104static const struct software_node apl_i2c_node = {
105	.properties = apl_i2c_properties,
106};
107
108static const struct intel_lpss_platform_info apl_i2c_info = {
109	.clk_rate = 133000000,
110	.swnode = &apl_i2c_node,
111};
112
113static const struct property_entry cnl_spi_properties[] = {
114	PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
115	{ }
116};
117
118static const struct software_node cnl_spi_node = {
119	.properties = cnl_spi_properties,
120};
121
122static const struct intel_lpss_platform_info cnl_info = {
123	.clk_rate = 120000000,
124	.swnode = &cnl_spi_node,
125};
126
127static const struct intel_lpss_platform_info cnl_i2c_info = {
128	.clk_rate = 216000000,
129	.swnode = &spt_i2c_node,
130};
131
132static const struct acpi_device_id intel_lpss_acpi_ids[] = {
133	/* SPT */
134	{ "INT3440", (kernel_ulong_t)&spt_info },
135	{ "INT3441", (kernel_ulong_t)&spt_info },
136	{ "INT3442", (kernel_ulong_t)&spt_i2c_info },
137	{ "INT3443", (kernel_ulong_t)&spt_i2c_info },
138	{ "INT3444", (kernel_ulong_t)&spt_i2c_info },
139	{ "INT3445", (kernel_ulong_t)&spt_i2c_info },
140	{ "INT3446", (kernel_ulong_t)&spt_i2c_info },
141	{ "INT3447", (kernel_ulong_t)&spt_i2c_info },
142	{ "INT3448", (kernel_ulong_t)&spt_uart_info },
143	{ "INT3449", (kernel_ulong_t)&spt_uart_info },
144	{ "INT344A", (kernel_ulong_t)&spt_uart_info },
145	/* CNL */
146	{ "INT34B0", (kernel_ulong_t)&cnl_info },
147	{ "INT34B1", (kernel_ulong_t)&cnl_info },
148	{ "INT34B2", (kernel_ulong_t)&cnl_i2c_info },
149	{ "INT34B3", (kernel_ulong_t)&cnl_i2c_info },
150	{ "INT34B4", (kernel_ulong_t)&cnl_i2c_info },
151	{ "INT34B5", (kernel_ulong_t)&cnl_i2c_info },
152	{ "INT34B6", (kernel_ulong_t)&cnl_i2c_info },
153	{ "INT34B7", (kernel_ulong_t)&cnl_i2c_info },
154	{ "INT34B8", (kernel_ulong_t)&spt_uart_info },
155	{ "INT34B9", (kernel_ulong_t)&spt_uart_info },
156	{ "INT34BA", (kernel_ulong_t)&spt_uart_info },
157	{ "INT34BC", (kernel_ulong_t)&cnl_info },
158	/* BXT */
159	{ "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
160	{ "80860ABC", (kernel_ulong_t)&bxt_info },
161	{ "80860AC2", (kernel_ulong_t)&bxt_info },
162	/* APL */
163	{ "80865AAC", (kernel_ulong_t)&apl_i2c_info },
164	{ "80865ABC", (kernel_ulong_t)&bxt_info },
165	{ "80865AC2", (kernel_ulong_t)&bxt_info },
166	{ }
167};
168MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
169
170static int intel_lpss_acpi_probe(struct platform_device *pdev)
171{
172	struct intel_lpss_platform_info *info;
173	const struct acpi_device_id *id;
174	int ret;
175
176	id = acpi_match_device(intel_lpss_acpi_ids, &pdev->dev);
177	if (!id)
178		return -ENODEV;
179
180	info = devm_kmemdup(&pdev->dev, (void *)id->driver_data, sizeof(*info),
181			    GFP_KERNEL);
182	if (!info)
183		return -ENOMEM;
184
185	info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
186	if (!info->mem)
187		return -ENODEV;
188
189	info->irq = platform_get_irq(pdev, 0);
190
191	ret = intel_lpss_probe(&pdev->dev, info);
192	if (ret)
193		return ret;
194
195	pm_runtime_set_active(&pdev->dev);
196	pm_runtime_enable(&pdev->dev);
197
198	return 0;
199}
200
201static int intel_lpss_acpi_remove(struct platform_device *pdev)
202{
203	intel_lpss_remove(&pdev->dev);
204	pm_runtime_disable(&pdev->dev);
205
206	return 0;
207}
208
209static INTEL_LPSS_PM_OPS(intel_lpss_acpi_pm_ops);
210
211static struct platform_driver intel_lpss_acpi_driver = {
212	.probe = intel_lpss_acpi_probe,
213	.remove = intel_lpss_acpi_remove,
214	.driver = {
215		.name = "intel-lpss",
216		.acpi_match_table = intel_lpss_acpi_ids,
217		.pm = &intel_lpss_acpi_pm_ops,
218	},
219};
220
221module_platform_driver(intel_lpss_acpi_driver);
222
223MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
224MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
225MODULE_DESCRIPTION("Intel LPSS ACPI driver");
226MODULE_LICENSE("GPL v2");
227