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
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */
#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
#include <device/device.h>
#include <device/path.h>
#include <string.h>
#include "chip.h"
static void gpio_regulator_fill_ssdt_generator(const struct device *dev)
{
struct drivers_generic_gpio_regulator_config *config = dev->chip_info;
const char *scope = acpi_device_scope(dev);
const char *path = acpi_device_path(dev);
struct acpi_dp *dsd;
if (!dev->enabled || !scope || !path || !config->gpio.pin_count)
return;
/* Device */
acpigen_write_scope(scope);
acpigen_write_device(acpi_device_name(dev));
/* _HID is set to PRP0001 */
acpigen_write_name_string("_HID", ACPI_DT_NAMESPACE_HID);
/* Resources - _CRS */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_gpio(&config->gpio);
acpigen_write_resourcetemplate_footer();
/* DSD */
dsd = acpi_dp_new_table("_DSD");
acpi_dp_add_string(dsd, "compatible", "regulator-fixed");
acpi_dp_add_string(dsd, "regulator-name", config->name);
acpi_dp_add_gpio(dsd, "gpio-gpios", path, 0, 0, config->gpio.polarity);
if (config->enabled_on_boot)
acpi_dp_add_string(dsd, "regulator-boot-on", "on");
if (config->gpio.polarity == ACPI_GPIO_ACTIVE_HIGH)
acpi_dp_add_string(dsd, "enable-active-high", "on");
acpi_dp_write(dsd);
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
}
static const char *gpio_regulator_acpi_name(const struct device *dev)
{
struct drivers_generic_gpio_regulator_config *config = dev->chip_info;
static char name[5];
snprintf(name, sizeof(name), "R%03.3X", config->gpio.pins[0]);
name[4] = '\0';
return name;
}
static struct device_operations gpio_regulator_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.acpi_name = gpio_regulator_acpi_name,
.acpi_fill_ssdt = gpio_regulator_fill_ssdt_generator,
};
static void gpio_regulator_enable(struct device *dev)
{
dev->ops = &gpio_regulator_ops;
}
struct chip_operations drivers_generic_gpio_regulator_ops = {
CHIP_NAME("GPIO Regulator")
.enable_dev = gpio_regulator_enable
};
|
