| /* 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_device_status(dev)); |
| |
| /* 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 = { |
| CHIP_NAME(I2C_SX9310_ACPI_NAME) |
| .enable_dev = i2c_sx9310_enable |
| }; |