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/* 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 <string.h>
#include "chip.h"
#define I2C_SX9310_ACPI_ID "STH9310"
#define I2C_SX9310_ACPI_NAME "Semtech SX9310"
static const char * const i2c_sx9310_resolution[] = {
[SX9310_COARSEST] = "coarsest",
[SX9310_VERY_COARSE] = "very-coarse",
[SX9310_COARSE] = "coarse",
[SX9310_MEDIUM_COARSE] = "medium-coarse",
[SX9310_MEDIUM] = "medium",
[SX9310_FINE] = "fine",
[SX9310_VERY_FINE] = "very-fine",
[SX9310_FINEST] = "finest",
};
static void i2c_sx9310_fill_ssdt(const struct device *dev)
{
struct drivers_i2c_sx9310_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 = I2C_SPEED_FAST,
.resource = scope,
};
struct acpi_dp *dsd;
struct acpi_dp *combined_sensors;
if (!scope || !config)
return;
if (config->speed)
i2c.speed = config->speed;
/* Device */
acpigen_write_scope(scope);
acpigen_write_device(acpi_device_name(dev));
acpigen_write_name_string("_HID", I2C_SX9310_ACPI_ID);
acpigen_write_name_integer("_UID", config->uid);
acpigen_write_name_string("_DDN", config->desc);
acpigen_write_STA(ACPI_STATUS_DEVICE_HIDDEN_ON);
/* Resources */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_i2c(&i2c);
if (config->irq_gpio.pin_count)
acpi_device_write_gpio(&config->irq_gpio);
else
acpi_device_write_interrupt(&config->irq);
acpigen_write_resourcetemplate_footer();
/* DSD */
dsd = acpi_dp_new_table("_DSD");
/*
* Format describe in linux kernel documentation. See
* https://www.kernel.org/doc/Documentation/devicetree/bindings/iio/proximity/semtech%2Csx9310.yaml
*/
acpi_dp_add_integer(dsd, "semtech,cs0-ground", config->cs0_ground);
acpi_dp_add_integer(dsd, "semtech,startup-sensor",
config->startup_sensor);
acpi_dp_add_integer(dsd, "semtech,proxraw-strength",
config->proxraw_strength);
acpi_dp_add_integer(dsd, "semtech,avg-pos-strength",
config->avg_pos_strength);
/* Add combined_sensors package */
if (config->combined_sensors_count > 0) {
combined_sensors = acpi_dp_new_table("semtech,combined-sensors");
for (int i = 0;
i < config->combined_sensors_count &&
i < MAX_COMBINED_SENSORS_ENTRIES; ++i) {
acpi_dp_add_integer(combined_sensors, NULL,
config->combined_sensors[i]);
}
acpi_dp_add_array(dsd, combined_sensors);
}
if (config->resolution && config->resolution < ARRAY_SIZE(i2c_sx9310_resolution))
acpi_dp_add_string(dsd, "semtech,resolution",
i2c_sx9310_resolution[config->resolution]);
acpi_dp_write(dsd);
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev),
config->desc ? : dev->chip_ops->name, dev_path(dev));
}
static const char *i2c_sx9310_acpi_name(const struct device *dev)
{
static char name[5];
snprintf(name, sizeof(name), "D%03.3X", dev->path.i2c.device);
return name;
}
static struct device_operations i2c_sx9310_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.acpi_name = i2c_sx9310_acpi_name,
.acpi_fill_ssdt = i2c_sx9310_fill_ssdt,
};
static void i2c_sx9310_enable(struct device *dev)
{
struct drivers_i2c_sx9310_config *config = dev->chip_info;
if (!config) {
dev->enabled = 0;
return;
}
dev->ops = &i2c_sx9310_ops;
if (config->desc)
dev->name = config->desc;
}
struct chip_operations drivers_i2c_sx9310_ops = {
.name = I2C_SX9310_ACPI_NAME,
.enable_dev = i2c_sx9310_enable
};
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