1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <acpi/acpi_device.h>
4 #include <acpi/acpigen.h>
5 #include <console/console.h>
6 #include <device/device.h>
7 #include <gpio.h>
8 #include "chip.h"
9
10 const char *nauhid[MAX_HID] = {"NVTN2010", "NVTN2012"};
11
nau8315_fill_ssdt(const struct device * dev)12 static void nau8315_fill_ssdt(const struct device *dev)
13 {
14 struct drivers_generic_nau8315_config *config = dev->chip_info;
15 const char *path;
16 struct acpi_dp *dp;
17
18 if (!dev->enabled || !config)
19 return;
20
21 const char *scope = acpi_device_scope(dev);
22 const char *name = acpi_device_name(dev);
23 if (!scope || !name)
24 return;
25
26 /* Device */
27 acpigen_write_scope(scope);
28 acpigen_write_device(name);
29
30 acpigen_write_name_string("_HID", nauhid[config->hid]);
31 acpigen_write_name_integer("_UID", 0);
32 acpigen_write_name_string("_DDN", dev->chip_ops->name);
33 acpigen_write_STA(acpi_device_status(dev));
34
35 /* Resources */
36 acpigen_write_name("_CRS");
37 acpigen_write_resourcetemplate_header();
38 acpi_device_write_gpio(&config->enable_gpio);
39 acpigen_write_resourcetemplate_footer();
40
41 /* _DSD for devicetree properties */
42 /* This points to the first pin in the first gpio entry in _CRS */
43 path = acpi_device_path(dev);
44 dp = acpi_dp_new_table("_DSD");
45 acpi_dp_add_gpio(dp, "enable-gpios", path, 0, 0,
46 config->enable_gpio.active_low);
47 acpi_dp_write(dp);
48
49 acpigen_pop_len(); /* Device */
50 acpigen_pop_len(); /* Scope */
51
52 printk(BIOS_INFO, "%s: %s\n", path, dev->chip_ops->name);
53 }
54
nau8315_acpi_name(const struct device * dev)55 static const char *nau8315_acpi_name(const struct device *dev)
56 {
57 return "NVTN";
58 }
59
60 static struct device_operations nau8315_ops = {
61 .read_resources = noop_read_resources,
62 .set_resources = noop_set_resources,
63 .acpi_name = nau8315_acpi_name,
64 .acpi_fill_ssdt = nau8315_fill_ssdt,
65 };
66
nau8315_enable(struct device * dev)67 static void nau8315_enable(struct device *dev)
68 {
69 dev->ops = &nau8315_ops;
70 }
71
72 struct chip_operations drivers_generic_nau8315_ops = {
73 .name = "Nuvoton NAU8315 Amplifier",
74 .enable_dev = nau8315_enable
75 };
76