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
|
diff --git a/drivers/platform/x86/up_board_leds.c b/drivers/platform/x86/up_board_leds.c
new file mode 100644
index 0000000..4186475
--- /dev/null
+++ b/drivers/platform/x86/up_board_leds.c
@@ -0,0 +1,85 @@
+/*
+ * UP Board CPLD LEDs driver.
+ *
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Javier Arteaga <javier@emutex.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+
+#include "up_board_leds.h"
+
+/* Internal context information for this driver */
+struct up_board_led {
+ struct up_board_leds_pdata *pdata;
+ unsigned int offset;
+ const char *name;
+ struct led_classdev cdev;
+};
+
+static void up_led_brightness_set(struct led_classdev *cdev,
+ enum led_brightness value)
+{
+ struct up_board_led *led = container_of(cdev,
+ struct up_board_led,
+ cdev);
+ struct up_board_cpld_info *cpld_info = &led->pdata->cpld_info;
+
+ cpld_info->reg_set_bit(cpld_info->cpld, led->offset, value != LED_OFF);
+}
+
+static int up_board_leds_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct up_board_leds_pdata *pdata = dev_get_platdata(dev);
+ struct up_board_led *up_led;
+ int ret = 0;
+ size_t i;
+
+ for (i = 0; i < pdata->nled; i++) {
+ struct up_board_led_info *led_info = &pdata->leds[i];
+
+ up_led = devm_kzalloc(dev, sizeof(*up_led), GFP_KERNEL);
+ if (!up_led)
+ return -ENOMEM;
+
+ up_led->pdata = pdata;
+ up_led->offset = led_info->cpld_offset;
+ up_led->cdev.brightness_set = up_led_brightness_set;
+ up_led->cdev.name = led_info->name;
+
+ ret = devm_led_classdev_register(dev, &up_led->cdev);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver up_board_leds_driver = {
+ .driver.name = "up-board-leds",
+ .driver.owner = THIS_MODULE,
+ .probe = up_board_leds_probe,
+};
+
+module_platform_driver(up_board_leds_driver);
+
+MODULE_AUTHOR("Javier Arteaga <javier@emutex.com>");
+MODULE_DESCRIPTION("UP Board LEDs driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:up-board-leds");
diff --git a/drivers/platform/x86/up_board_leds.h b/drivers/platform/x86/up_board_leds.h
new file mode 100644
index 0000000..473b1ad
--- /dev/null
+++ b/drivers/platform/x86/up_board_leds.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2016, Emutex Ltd. All rights reserved.
+ *
+ * Author: Dan O'Donovan <dan@emutex.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _UP_BOARD_LED_H_
+#define _UP_BOARD_LED_H_
+
+#include "up_board_cpld.h"
+
+/**
+ * struct up_board_led_info - information for an UP Board LED
+ * @name: LED name
+ * @cpld_offset: CPLD register bit offset for LED control
+ *
+ * Information for a single CPLD-controlled LED on the UP Board.
+ */
+struct up_board_led_info {
+ const char *name;
+ unsigned int cpld_offset;
+};
+
+/**
+ * struct up_board_leds_pdata - platform driver data
+ * @cpld_info: CPLD configuration interface information
+ * @leds: Array of LED information structures
+ * @nled: Number of entries in leds array
+ *
+ * Platform data provided to UP Board CPLD LEDs platform device driver.
+ * Provides information for each CPLD-controlled LED on the UP Board.
+ */
+struct up_board_leds_pdata {
+ struct up_board_cpld_info cpld_info;
+ struct up_board_led_info *leds;
+ size_t nled;
+};
+
+#endif /* _UP_BOARD_LED_H_ */
|