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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
#include <console/console.h>
#include <device/i2c_simple.h>
#include <device/device.h>
#include <device/path.h>
#include "chip.h"
#define MAX98396_ACPI_HID "ADS8396"
static void max98396_fill_ssdt(const struct device *dev)
{
struct drivers_i2c_max98396_config *config = dev->chip_info;
const char *scope = acpi_device_scope(dev);
struct acpi_i2c i2c = {
.address = dev->path.i2c.device,
.mode_10bit = dev->path.i2c.mode_10bit,
.speed = config->bus_speed ? : I2C_SPEED_FAST,
.resource = scope,
};
struct acpi_dp *dp;
const char *path = acpi_device_path(dev);
if (!scope) {
printk(BIOS_ERR, "%s: dev not enabled\n", __func__);
return;
}
/* Device */
acpigen_write_scope(scope);
acpigen_write_device(acpi_device_name(dev));
acpigen_write_name_string("_HID", MAX98396_ACPI_HID);
acpigen_write_name_integer("_UID", config->uid);
if (config->desc)
acpigen_write_name_string("_DDN", config->desc);
acpigen_write_STA(acpi_device_status(dev));
/* Resources */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_i2c(&i2c);
if (config->reset_gpio.pin_count)
acpi_device_write_gpio(&config->reset_gpio);
acpigen_write_resourcetemplate_footer();
/* Device Properties */
dp = acpi_dp_new_table("_DSD");
acpi_dp_add_integer(dp, "adi,vmon-slot-no", config->vmon_slot_no);
acpi_dp_add_integer(dp, "adi,imon-slot-no", config->imon_slot_no);
acpi_dp_add_integer(dp, "adi,spkfb-slot-no", config->spkfb_slot_no);
if (config->reset_gpio.pin_count)
acpi_dp_add_gpio(dp, "reset-gpios", path,
0, /* Index = 0 */
0, /* Pin = 0 */
config->reset_gpio.active_low);
acpi_dp_write(dp);
acpigen_write_device_end();
acpigen_write_scope_end();
printk(BIOS_INFO, "%s: %s address 0%xh\n", acpi_device_path(dev),
dev->chip_ops->name, dev->path.i2c.device);
}
static const char *max98396_acpi_name(const struct device *dev)
{
struct drivers_i2c_max98396_config *config = dev->chip_info;
static char name[ACPI_NAME_BUFFER_SIZE];
if (config->name && strlen(config->name) == 4)
return config->name;
snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
return name;
}
static struct device_operations max98396_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.acpi_name = max98396_acpi_name,
.acpi_fill_ssdt = max98396_fill_ssdt,
};
static void max98396_enable(struct device *dev)
{
struct drivers_i2c_max98396_config *config = dev->chip_info;
dev->ops = &max98396_ops;
if (config->desc)
dev->name = config->desc;
}
struct chip_operations drivers_i2c_max98396_ops = {
CHIP_NAME("Maxim MAX98396 Codec")
.enable_dev = max98396_enable
};
|
