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10
11#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12
13#include <linux/dmi.h>
14#include <linux/err.h>
15#include <linux/kernel.h>
16#include <linux/leds.h>
17#include <linux/module.h>
18#include <linux/platform_device.h>
19#include <linux/gpio_keys.h>
20#include <linux/gpio/machine.h>
21#include <linux/input.h>
22#include <linux/platform_data/gpio/gpio-amd-fch.h>
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29
30#define APU2_GPIO_REG_LED1 AMD_FCH_GPIO_REG_GPIO57
31#define APU2_GPIO_REG_LED2 AMD_FCH_GPIO_REG_GPIO58
32#define APU2_GPIO_REG_LED3 AMD_FCH_GPIO_REG_GPIO59_DEVSLP1
33#define APU2_GPIO_REG_MODESW AMD_FCH_GPIO_REG_GPIO32_GE1
34#define APU2_GPIO_REG_SIMSWAP AMD_FCH_GPIO_REG_GPIO33_GE2
35
36
37#define APU2_GPIO_LINE_LED1 0
38#define APU2_GPIO_LINE_LED2 1
39#define APU2_GPIO_LINE_LED3 2
40#define APU2_GPIO_LINE_MODESW 3
41#define APU2_GPIO_LINE_SIMSWAP 4
42
43
44
45static int apu2_gpio_regs[] = {
46 [APU2_GPIO_LINE_LED1] = APU2_GPIO_REG_LED1,
47 [APU2_GPIO_LINE_LED2] = APU2_GPIO_REG_LED2,
48 [APU2_GPIO_LINE_LED3] = APU2_GPIO_REG_LED3,
49 [APU2_GPIO_LINE_MODESW] = APU2_GPIO_REG_MODESW,
50 [APU2_GPIO_LINE_SIMSWAP] = APU2_GPIO_REG_SIMSWAP,
51};
52
53static const char * const apu2_gpio_names[] = {
54 [APU2_GPIO_LINE_LED1] = "front-led1",
55 [APU2_GPIO_LINE_LED2] = "front-led2",
56 [APU2_GPIO_LINE_LED3] = "front-led3",
57 [APU2_GPIO_LINE_MODESW] = "front-button",
58 [APU2_GPIO_LINE_SIMSWAP] = "simswap",
59};
60
61static const struct amd_fch_gpio_pdata board_apu2 = {
62 .gpio_num = ARRAY_SIZE(apu2_gpio_regs),
63 .gpio_reg = apu2_gpio_regs,
64 .gpio_names = apu2_gpio_names,
65};
66
67
68
69static const struct gpio_led apu2_leds[] = {
70 { .name = "apu:green:1" },
71 { .name = "apu:green:2" },
72 { .name = "apu:green:3" }
73};
74
75static const struct gpio_led_platform_data apu2_leds_pdata = {
76 .num_leds = ARRAY_SIZE(apu2_leds),
77 .leds = apu2_leds,
78};
79
80static struct gpiod_lookup_table gpios_led_table = {
81 .dev_id = "leds-gpio",
82 .table = {
83 GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED1,
84 NULL, 0, GPIO_ACTIVE_LOW),
85 GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED2,
86 NULL, 1, GPIO_ACTIVE_LOW),
87 GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_LED3,
88 NULL, 2, GPIO_ACTIVE_LOW),
89 }
90};
91
92
93
94static struct gpio_keys_button apu2_keys_buttons[] = {
95 {
96 .code = KEY_RESTART,
97 .active_low = 1,
98 .desc = "front button",
99 .type = EV_KEY,
100 .debounce_interval = 10,
101 .value = 1,
102 },
103};
104
105static const struct gpio_keys_platform_data apu2_keys_pdata = {
106 .buttons = apu2_keys_buttons,
107 .nbuttons = ARRAY_SIZE(apu2_keys_buttons),
108 .poll_interval = 100,
109 .rep = 0,
110 .name = "apu2-keys",
111};
112
113static struct gpiod_lookup_table gpios_key_table = {
114 .dev_id = "gpio-keys-polled",
115 .table = {
116 GPIO_LOOKUP_IDX(AMD_FCH_GPIO_DRIVER_NAME, APU2_GPIO_LINE_MODESW,
117 NULL, 0, GPIO_ACTIVE_LOW),
118 }
119};
120
121
122
123
124static const struct dmi_system_id apu_gpio_dmi_table[] __initconst = {
125
126
127 {
128 .ident = "apu2",
129 .matches = {
130 DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
131 DMI_MATCH(DMI_BOARD_NAME, "APU2")
132 },
133 .driver_data = (void *)&board_apu2,
134 },
135
136 {
137 .ident = "apu2",
138 .matches = {
139 DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
140 DMI_MATCH(DMI_BOARD_NAME, "apu2")
141 },
142 .driver_data = (void *)&board_apu2,
143 },
144
145 {
146 .ident = "apu2",
147 .matches = {
148 DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
149 DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu2")
150 },
151 .driver_data = (void *)&board_apu2,
152 },
153
154
155 {
156 .ident = "apu3",
157 .matches = {
158 DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
159 DMI_MATCH(DMI_BOARD_NAME, "APU3")
160 },
161 .driver_data = (void *)&board_apu2,
162 },
163
164 {
165 .ident = "apu3",
166 .matches = {
167 DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
168 DMI_MATCH(DMI_BOARD_NAME, "apu3")
169 },
170 .driver_data = (void *)&board_apu2,
171 },
172
173 {
174 .ident = "apu3",
175 .matches = {
176 DMI_MATCH(DMI_SYS_VENDOR, "PC Engines"),
177 DMI_MATCH(DMI_BOARD_NAME, "PC Engines apu3")
178 },
179 .driver_data = (void *)&board_apu2,
180 },
181 {}
182};
183
184static struct platform_device *apu_gpio_pdev;
185static struct platform_device *apu_leds_pdev;
186static struct platform_device *apu_keys_pdev;
187
188static struct platform_device * __init apu_create_pdev(
189 const char *name,
190 const void *pdata,
191 size_t sz)
192{
193 struct platform_device *pdev;
194
195 pdev = platform_device_register_resndata(NULL,
196 name,
197 PLATFORM_DEVID_NONE,
198 NULL,
199 0,
200 pdata,
201 sz);
202
203 if (IS_ERR(pdev))
204 pr_err("failed registering %s: %ld\n", name, PTR_ERR(pdev));
205
206 return pdev;
207}
208
209static int __init apu_board_init(void)
210{
211 const struct dmi_system_id *id;
212
213 id = dmi_first_match(apu_gpio_dmi_table);
214 if (!id) {
215 pr_err("failed to detect apu board via dmi\n");
216 return -ENODEV;
217 }
218
219 gpiod_add_lookup_table(&gpios_led_table);
220 gpiod_add_lookup_table(&gpios_key_table);
221
222 apu_gpio_pdev = apu_create_pdev(
223 AMD_FCH_GPIO_DRIVER_NAME,
224 id->driver_data,
225 sizeof(struct amd_fch_gpio_pdata));
226
227 apu_leds_pdev = apu_create_pdev(
228 "leds-gpio",
229 &apu2_leds_pdata,
230 sizeof(apu2_leds_pdata));
231
232 apu_keys_pdev = apu_create_pdev(
233 "gpio-keys-polled",
234 &apu2_keys_pdata,
235 sizeof(apu2_keys_pdata));
236
237 return 0;
238}
239
240static void __exit apu_board_exit(void)
241{
242 gpiod_remove_lookup_table(&gpios_led_table);
243 gpiod_remove_lookup_table(&gpios_key_table);
244
245 platform_device_unregister(apu_keys_pdev);
246 platform_device_unregister(apu_leds_pdev);
247 platform_device_unregister(apu_gpio_pdev);
248}
249
250module_init(apu_board_init);
251module_exit(apu_board_exit);
252
253MODULE_AUTHOR("Enrico Weigelt, metux IT consult <info@metux.net>");
254MODULE_DESCRIPTION("PC Engines APUv2/APUv3 board GPIO/LED/keys driver");
255MODULE_LICENSE("GPL");
256MODULE_DEVICE_TABLE(dmi, apu_gpio_dmi_table);
257MODULE_ALIAS("platform:pcengines-apuv2");
258MODULE_SOFTDEP("pre: platform:" AMD_FCH_GPIO_DRIVER_NAME " platform:leds-gpio platform:gpio_keys_polled");
259
