| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <acpi/acpi_device.h> |
| #include <acpi/acpigen.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/path.h> |
| #include <string.h> |
| #include "chip.h" |
| |
| #define CROS_EC_I2C_TUNNEL_HID "GOOG0012" |
| #define CROS_EC_I2C_TUNNEL_DDN "Cros EC I2C Tunnel" |
| |
| static void crosec_i2c_tunnel_fill_ssdt(const struct device *dev) |
| { |
| const char *scope = acpi_device_scope(dev); |
| struct ec_google_chromeec_i2c_tunnel_config *cfg = dev->chip_info; |
| struct acpi_dp *dsd; |
| |
| if (!scope || !cfg) |
| return; |
| |
| acpigen_write_scope(scope); |
| |
| acpigen_write_device(acpi_device_name(dev)); |
| acpigen_write_name_string("_HID", CROS_EC_I2C_TUNNEL_HID); |
| acpigen_write_name_integer("_UID", cfg->uid); |
| acpigen_write_name_string("_DDN", CROS_EC_I2C_TUNNEL_DDN); |
| acpigen_write_STA(acpi_device_status(dev)); |
| |
| dsd = acpi_dp_new_table("_DSD"); |
| acpi_dp_add_integer(dsd, "google,remote-bus", cfg->remote_bus); |
| acpi_dp_write(dsd); |
| |
| acpigen_pop_len(); /* Device */ |
| acpigen_pop_len(); /* Scope */ |
| |
| printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), CROS_EC_I2C_TUNNEL_DDN, |
| dev_path(dev)); |
| } |
| |
| static const char *crosec_i2c_tunnel_acpi_name(const struct device *dev) |
| { |
| struct ec_google_chromeec_i2c_tunnel_config *cfg = dev->chip_info; |
| static char name[5]; |
| |
| if (cfg->name) |
| return cfg->name; |
| |
| snprintf(name, sizeof(name), "TUN%X", dev->path.generic.id); |
| return name; |
| } |
| |
| static struct device_operations crosec_i2c_tunnel_ops = { |
| .read_resources = noop_read_resources, |
| .set_resources = noop_set_resources, |
| .acpi_name = crosec_i2c_tunnel_acpi_name, |
| .acpi_fill_ssdt = crosec_i2c_tunnel_fill_ssdt, |
| .scan_bus = scan_static_bus, |
| }; |
| |
| static void crosec_i2c_tunnel_enable(struct device *dev) |
| { |
| dev->ops = &crosec_i2c_tunnel_ops; |
| } |
| |
| struct chip_operations ec_google_chromeec_i2c_tunnel_ops = { |
| .name = "CrosEC I2C Tunnel Device", |
| .enable_dev = crosec_i2c_tunnel_enable |
| }; |