108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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#include <acpi/acpi_device.h>
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#include <acpi/acpigen.h>
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#include <console/console.h>
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#include <device/i2c_simple.h>
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#include <device/device.h>
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#include <device/path.h>
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#include <string.h>
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#include "chip.h"
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#define I2C_SX9360_ACPI_ID "STH9360"
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#define I2C_SX9360_CHIP_NAME "Semtech SX9360"
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static void i2c_sx9360_fill_ssdt(const struct device *dev)
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{
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struct drivers_i2c_sx9360_config *config = dev->chip_info;
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const char *scope = acpi_device_scope(dev);
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struct acpi_i2c i2c = {
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.address = dev->path.i2c.device,
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.mode_10bit = dev->path.i2c.mode_10bit,
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.speed = I2C_SPEED_FAST,
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.resource = scope,
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};
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struct acpi_dp *dsd;
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if (!scope || !config)
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return;
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if (config->speed)
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i2c.speed = config->speed;
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/* Device */
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acpigen_write_scope(scope);
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acpigen_write_device(acpi_device_name(dev));
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acpigen_write_name_string("_HID", I2C_SX9360_ACPI_ID);
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acpigen_write_name_integer("_UID", config->uid);
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acpigen_write_name_string("_DDN", config->desc);
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acpigen_write_STA(acpi_device_status(dev));
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/* Resources */
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acpigen_write_name("_CRS");
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acpigen_write_resourcetemplate_header();
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acpi_device_write_i2c(&i2c);
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if (config->irq_gpio.pin_count)
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acpi_device_write_gpio(&config->irq_gpio);
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else
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acpi_device_write_interrupt(&config->irq);
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acpigen_write_resourcetemplate_footer();
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/* DSD */
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dsd = acpi_dp_new_table("_DSD");
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/*
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* Format described in linux kernel documentation. See
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* https://www.kernel.org/doc/Documentation/devicetree/bindings/iio/proximity/semtech%2Csx9360.yaml
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*/
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acpi_dp_add_integer(dsd, "semtech,proxraw-strength",
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config->proxraw_strength);
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acpi_dp_add_integer(dsd, "semtech,avg-pos-strength",
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config->avg_pos_strength);
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acpi_dp_add_integer(dsd, "semtech,resolution",
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config->resolution);
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acpi_dp_write(dsd);
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acpigen_pop_len(); /* Device */
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acpigen_pop_len(); /* Scope */
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printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev),
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config->desc ? : dev->chip_ops->name, dev_path(dev));
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}
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static const char *i2c_sx9360_acpi_name(const struct device *dev)
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{
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static char name[5];
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snprintf(name, sizeof(name), "SX%02.2X", dev->path.i2c.device);
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return name;
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}
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static struct device_operations i2c_sx9360_ops = {
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.read_resources = noop_read_resources,
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.set_resources = noop_set_resources,
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.acpi_name = i2c_sx9360_acpi_name,
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.acpi_fill_ssdt = i2c_sx9360_fill_ssdt,
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};
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static void i2c_sx9360_enable(struct device *dev)
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{
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struct drivers_i2c_sx9360_config *config = config_of(dev);
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if (!is_dev_enabled(dev))
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return;
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dev->ops = &i2c_sx9360_ops;
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if (config->desc)
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dev->name = config->desc;
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}
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struct chip_operations drivers_i2c_sx9360_ops = {
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CHIP_NAME(I2C_SX9360_CHIP_NAME)
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.enable_dev = i2c_sx9360_enable
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};
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