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/i2c_simple.h>
7 #include <device/device.h>
8 #include <stdio.h>
9
10 #include "chip.h"
11
12 #define I2C_SX9324_ACPI_ID "STH9324"
13 #define I2C_SX9324_CHIP_NAME "Semtech SX9324"
14
15 #define REGISTER(NAME) acpi_dp_add_integer(dsd, \
16 I2C_SX9324_ACPI_ID "," #NAME, \
17 config->NAME)
18
i2c_sx9324_fill_ssdt(const struct device * dev)19 static void i2c_sx9324_fill_ssdt(const struct device *dev)
20 {
21 struct drivers_i2c_sx9324_config *config = dev->chip_info;
22 const char *scope = acpi_device_scope(dev);
23 struct acpi_i2c i2c = {
24 .address = dev->path.i2c.device,
25 .mode_10bit = dev->path.i2c.mode_10bit,
26 .speed = I2C_SPEED_FAST,
27 .resource = scope,
28 };
29 struct acpi_dp *dsd;
30
31 if (!scope || !config)
32 return;
33
34 if (config->speed)
35 i2c.speed = config->speed;
36
37 /* Device */
38 acpigen_write_scope(scope);
39 acpigen_write_device(acpi_device_name(dev));
40 acpigen_write_name_string("_HID", I2C_SX9324_ACPI_ID);
41 acpigen_write_name_integer("_UID", config->uid);
42 acpigen_write_name_string("_DDN", config->desc);
43 acpigen_write_STA(acpi_device_status(dev));
44
45 /* Resources */
46 acpigen_write_name("_CRS");
47 acpigen_write_resourcetemplate_header();
48 acpi_device_write_i2c(&i2c);
49
50 if (config->irq_gpio.pin_count)
51 acpi_device_write_gpio(&config->irq_gpio);
52 else
53 acpi_device_write_interrupt(&config->irq);
54
55 acpigen_write_resourcetemplate_footer();
56
57 /* DSD */
58 dsd = acpi_dp_new_table("_DSD");
59 acpi_dp_add_integer_array(dsd, "semtech,ph0-pin", config->ph0_pin, ARRAY_SIZE(config->ph0_pin));
60 acpi_dp_add_integer_array(dsd, "semtech,ph1-pin", config->ph1_pin, ARRAY_SIZE(config->ph1_pin));
61 acpi_dp_add_integer_array(dsd, "semtech,ph2-pin", config->ph2_pin, ARRAY_SIZE(config->ph2_pin));
62 acpi_dp_add_integer_array(dsd, "semtech,ph3-pin", config->ph3_pin, ARRAY_SIZE(config->ph3_pin));
63 acpi_dp_add_integer(dsd, "semtech,ph01-resolution", config->ph01_resolution);
64 acpi_dp_add_integer(dsd, "semtech,ph23-resolution", config->ph23_resolution);
65 acpi_dp_add_integer(dsd, "semtech,startup-sensor", config->startup_sensor);
66 acpi_dp_add_integer(dsd, "semtech,ph01-proxraw-strength", config->ph01_proxraw_strength);
67 acpi_dp_add_integer(dsd, "semtech,ph23-proxraw-strength", config->ph23_proxraw_strength);
68 acpi_dp_add_integer(dsd, "semtech,avg-pos-strength", config->avg_pos_strength);
69 acpi_dp_add_integer(dsd, "semtech,input-precharge-resistor-ohms", config->input_precharge_resistor_ohms);
70 acpi_dp_add_integer(dsd, "semtech,input-analog-gain", config->input_analog_gain);
71 acpi_dp_add_string(dsd, "semtech,cs-idle-sleep", config->cs_idle_sleep);
72 acpi_dp_add_string(dsd, "semtech,int-comp-resistor", config->int_comp_resistor);
73 #if CONFIG(DRIVERS_I2C_SX9324_SUPPORT_LEGACY_LINUX_DRIVER)
74 #include "registers.h"
75 #endif
76 acpi_dp_write(dsd);
77
78 acpigen_pop_len(); /* Device */
79 acpigen_pop_len(); /* Scope */
80
81 printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev),
82 config->desc ? : dev->chip_ops->name, dev_path(dev));
83 }
84
85 #undef REGISTER
86
i2c_sx9324_acpi_name(const struct device * dev)87 static const char *i2c_sx9324_acpi_name(const struct device *dev)
88 {
89 static char name[5];
90
91 snprintf(name, sizeof(name), "SX%02.2X", dev->path.i2c.device);
92 return name;
93 }
94
95 static struct device_operations i2c_sx9324_ops = {
96 .read_resources = noop_read_resources,
97 .set_resources = noop_set_resources,
98 .acpi_name = i2c_sx9324_acpi_name,
99 .acpi_fill_ssdt = i2c_sx9324_fill_ssdt,
100 };
101
i2c_sx9324_enable(struct device * dev)102 static void i2c_sx9324_enable(struct device *dev)
103 {
104 struct drivers_i2c_sx9324_config *config = dev->chip_info;
105
106 if (!config) {
107 dev->enabled = 0;
108 return;
109 }
110
111 dev->ops = &i2c_sx9324_ops;
112
113 if (config->desc)
114 dev->name = config->desc;
115 }
116
117 struct chip_operations drivers_i2c_sx9324_ops = {
118 .name = I2C_SX9324_CHIP_NAME,
119 .enable_dev = i2c_sx9324_enable
120 };
121