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/device.h>
12#include <linux/gfp_types.h>
13#include <linux/ioport.h>
14#include <linux/mod_devicetable.h>
15#include <linux/module.h>
16#include <linux/pm.h>
17#include <linux/pm_runtime.h>
18#include <linux/platform_device.h>
19#include <linux/property.h>
20
21#include <linux/pxa2xx_ssp.h>
22
23#include <asm/errno.h>
24
25#include "intel-lpss.h"
26
27static const struct property_entry spt_spi_properties[] = {
28	PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
29	{ }
30};
31
32static const struct software_node spt_spi_node = {
33	.properties = spt_spi_properties,
34};
35
36static const struct intel_lpss_platform_info spt_info = {
37	.clk_rate = 120000000,
38	.swnode = &spt_spi_node,
39};
40
41static const struct property_entry spt_i2c_properties[] = {
42	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
43	{ },
44};
45
46static const struct software_node spt_i2c_node = {
47	.properties = spt_i2c_properties,
48};
49
50static const struct intel_lpss_platform_info spt_i2c_info = {
51	.clk_rate = 120000000,
52	.swnode = &spt_i2c_node,
53};
54
55static const struct property_entry uart_properties[] = {
56	PROPERTY_ENTRY_U32("reg-io-width", 4),
57	PROPERTY_ENTRY_U32("reg-shift", 2),
58	PROPERTY_ENTRY_BOOL("snps,uart-16550-compatible"),
59	{ },
60};
61
62static const struct software_node uart_node = {
63	.properties = uart_properties,
64};
65
66static const struct intel_lpss_platform_info spt_uart_info = {
67	.clk_rate = 120000000,
68	.clk_con_id = "baudclk",
69	.swnode = &uart_node,
70};
71
72static const struct property_entry bxt_spi_properties[] = {
73	PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
74	{ }
75};
76
77static const struct software_node bxt_spi_node = {
78	.properties = bxt_spi_properties,
79};
80
81static const struct intel_lpss_platform_info bxt_info = {
82	.clk_rate = 100000000,
83	.swnode = &bxt_spi_node,
84};
85
86static const struct property_entry bxt_i2c_properties[] = {
87	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 42),
88	PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
89	PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
90	{ },
91};
92
93static const struct software_node bxt_i2c_node = {
94	.properties = bxt_i2c_properties,
95};
96
97static const struct intel_lpss_platform_info bxt_i2c_info = {
98	.clk_rate = 133000000,
99	.swnode = &bxt_i2c_node,
100};
101
102static const struct property_entry apl_i2c_properties[] = {
103	PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 207),
104	PROPERTY_ENTRY_U32("i2c-sda-falling-time-ns", 171),
105	PROPERTY_ENTRY_U32("i2c-scl-falling-time-ns", 208),
106	{ },
107};
108
109static const struct software_node apl_i2c_node = {
110	.properties = apl_i2c_properties,
111};
112
113static const struct intel_lpss_platform_info apl_i2c_info = {
114	.clk_rate = 133000000,
115	.swnode = &apl_i2c_node,
116};
117
118static const struct property_entry cnl_spi_properties[] = {
119	PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
120	{ }
121};
122
123static const struct software_node cnl_spi_node = {
124	.properties = cnl_spi_properties,
125};
126
127static const struct intel_lpss_platform_info cnl_info = {
128	.clk_rate = 120000000,
129	.swnode = &cnl_spi_node,
130};
131
132static const struct intel_lpss_platform_info cnl_i2c_info = {
133	.clk_rate = 216000000,
134	.swnode = &spt_i2c_node,
135};
136
137static const struct acpi_device_id intel_lpss_acpi_ids[] = {
138	/* SPT */
139	{ "INT3440", (kernel_ulong_t)&spt_info },
140	{ "INT3441", (kernel_ulong_t)&spt_info },
141	{ "INT3442", (kernel_ulong_t)&spt_i2c_info },
142	{ "INT3443", (kernel_ulong_t)&spt_i2c_info },
143	{ "INT3444", (kernel_ulong_t)&spt_i2c_info },
144	{ "INT3445", (kernel_ulong_t)&spt_i2c_info },
145	{ "INT3446", (kernel_ulong_t)&spt_i2c_info },
146	{ "INT3447", (kernel_ulong_t)&spt_i2c_info },
147	{ "INT3448", (kernel_ulong_t)&spt_uart_info },
148	{ "INT3449", (kernel_ulong_t)&spt_uart_info },
149	{ "INT344A", (kernel_ulong_t)&spt_uart_info },
150	/* CNL */
151	{ "INT34B0", (kernel_ulong_t)&cnl_info },
152	{ "INT34B1", (kernel_ulong_t)&cnl_info },
153	{ "INT34B2", (kernel_ulong_t)&cnl_i2c_info },
154	{ "INT34B3", (kernel_ulong_t)&cnl_i2c_info },
155	{ "INT34B4", (kernel_ulong_t)&cnl_i2c_info },
156	{ "INT34B5", (kernel_ulong_t)&cnl_i2c_info },
157	{ "INT34B6", (kernel_ulong_t)&cnl_i2c_info },
158	{ "INT34B7", (kernel_ulong_t)&cnl_i2c_info },
159	{ "INT34B8", (kernel_ulong_t)&spt_uart_info },
160	{ "INT34B9", (kernel_ulong_t)&spt_uart_info },
161	{ "INT34BA", (kernel_ulong_t)&spt_uart_info },
162	{ "INT34BC", (kernel_ulong_t)&cnl_info },
163	/* BXT */
164	{ "80860AAC", (kernel_ulong_t)&bxt_i2c_info },
165	{ "80860ABC", (kernel_ulong_t)&bxt_info },
166	{ "80860AC2", (kernel_ulong_t)&bxt_info },
167	/* APL */
168	{ "80865AAC", (kernel_ulong_t)&apl_i2c_info },
169	{ "80865ABC", (kernel_ulong_t)&bxt_info },
170	{ "80865AC2", (kernel_ulong_t)&bxt_info },
171	{ }
172};
173MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
174
175static int intel_lpss_acpi_probe(struct platform_device *pdev)
176{
177	const struct intel_lpss_platform_info *data;
178	struct intel_lpss_platform_info *info;
179	int ret;
180
181	data = device_get_match_data(&pdev->dev);
182	if (!data)
183		return -ENODEV;
184
185	info = devm_kmemdup(&pdev->dev, data, sizeof(*info), GFP_KERNEL);
186	if (!info)
187		return -ENOMEM;
188
189	/* No need to check mem and irq here as intel_lpss_probe() does it for us */
190	info->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
191	info->irq = platform_get_irq(pdev, 0);
192
193	ret = intel_lpss_probe(&pdev->dev, info);
194	if (ret)
195		return ret;
196
197	pm_runtime_set_active(&pdev->dev);
198	pm_runtime_enable(&pdev->dev);
199
200	return 0;
201}
202
203static void intel_lpss_acpi_remove(struct platform_device *pdev)
204{
205	intel_lpss_remove(&pdev->dev);
206	pm_runtime_disable(&pdev->dev);
207}
208
209static struct platform_driver intel_lpss_acpi_driver = {
210	.probe = intel_lpss_acpi_probe,
211	.remove_new = intel_lpss_acpi_remove,
212	.driver = {
213		.name = "intel-lpss",
214		.acpi_match_table = intel_lpss_acpi_ids,
215		.pm = pm_ptr(&intel_lpss_pm_ops),
216	},
217};
218
219module_platform_driver(intel_lpss_acpi_driver);
220
221MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
222MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
223MODULE_DESCRIPTION("Intel LPSS ACPI driver");
224MODULE_LICENSE("GPL v2");
225MODULE_IMPORT_NS(INTEL_LPSS);
226