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
27 static const struct property_entry spt_spi_properties[] = {
28 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
29 { }
30 };
31
32 static const struct software_node spt_spi_node = {
33 .properties = spt_spi_properties,
34 };
35
36 static const struct intel_lpss_platform_info spt_info = {
37 .clk_rate = 120000000,
38 .swnode = &spt_spi_node,
39 };
40
41 static const struct property_entry spt_i2c_properties[] = {
42 PROPERTY_ENTRY_U32("i2c-sda-hold-time-ns", 230),
43 { },
44 };
45
46 static const struct software_node spt_i2c_node = {
47 .properties = spt_i2c_properties,
48 };
49
50 static const struct intel_lpss_platform_info spt_i2c_info = {
51 .clk_rate = 120000000,
52 .swnode = &spt_i2c_node,
53 };
54
55 static 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
62 static const struct software_node uart_node = {
63 .properties = uart_properties,
64 };
65
66 static const struct intel_lpss_platform_info spt_uart_info = {
67 .clk_rate = 120000000,
68 .clk_con_id = "baudclk",
69 .swnode = &uart_node,
70 };
71
72 static const struct property_entry bxt_spi_properties[] = {
73 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_BXT_SSP),
74 { }
75 };
76
77 static const struct software_node bxt_spi_node = {
78 .properties = bxt_spi_properties,
79 };
80
81 static const struct intel_lpss_platform_info bxt_info = {
82 .clk_rate = 100000000,
83 .swnode = &bxt_spi_node,
84 };
85
86 static 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
93 static const struct software_node bxt_i2c_node = {
94 .properties = bxt_i2c_properties,
95 };
96
97 static const struct intel_lpss_platform_info bxt_i2c_info = {
98 .clk_rate = 133000000,
99 .swnode = &bxt_i2c_node,
100 };
101
102 static 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
109 static const struct software_node apl_i2c_node = {
110 .properties = apl_i2c_properties,
111 };
112
113 static const struct intel_lpss_platform_info apl_i2c_info = {
114 .clk_rate = 133000000,
115 .swnode = &apl_i2c_node,
116 };
117
118 static const struct property_entry cnl_spi_properties[] = {
119 PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_CNL_SSP),
120 { }
121 };
122
123 static const struct software_node cnl_spi_node = {
124 .properties = cnl_spi_properties,
125 };
126
127 static const struct intel_lpss_platform_info cnl_info = {
128 .clk_rate = 120000000,
129 .swnode = &cnl_spi_node,
130 };
131
132 static const struct intel_lpss_platform_info cnl_i2c_info = {
133 .clk_rate = 216000000,
134 .swnode = &spt_i2c_node,
135 };
136
137 static 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 };
173 MODULE_DEVICE_TABLE(acpi, intel_lpss_acpi_ids);
174
intel_lpss_acpi_probe(struct platform_device * pdev)175 static 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
intel_lpss_acpi_remove(struct platform_device * pdev)203 static void intel_lpss_acpi_remove(struct platform_device *pdev)
204 {
205 intel_lpss_remove(&pdev->dev);
206 pm_runtime_disable(&pdev->dev);
207 }
208
209 static 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
219 module_platform_driver(intel_lpss_acpi_driver);
220
221 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
222 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
223 MODULE_DESCRIPTION("Intel LPSS ACPI driver");
224 MODULE_LICENSE("GPL v2");
225 MODULE_IMPORT_NS(INTEL_LPSS);
226