From f1114d891865e70ae1f2ba58844fec11d055ae3a Mon Sep 17 00:00:00 2001 From: Patrick Rudolph Date: Tue, 14 Nov 2017 19:00:20 +0100 Subject: ec/lenovo/h8/acpi: Add BDC interface * Add SSDT generator to add dynamic ACPI code. * Implement GBDC and SBDC for thinkpad_acpi kernel module. Required for BDC power control from userspace. Tested on Lenovo T430: The bluetooth module is detected and can be powercycled using network manager. Change-Id: Ida825196650966194a883945896a038b0790fe45 Signed-off-by: Patrick Rudolph Reviewed-on: https://review.coreboot.org/20985 Tested-by: build bot (Jenkins) Reviewed-by: Alexander Couzens Reviewed-by: Patrick Georgi --- src/ec/lenovo/h8/ssdt.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 src/ec/lenovo/h8/ssdt.c (limited to 'src/ec/lenovo/h8/ssdt.c') diff --git a/src/ec/lenovo/h8/ssdt.c b/src/ec/lenovo/h8/ssdt.c new file mode 100644 index 0000000000..35570b0b72 --- /dev/null +++ b/src/ec/lenovo/h8/ssdt.c @@ -0,0 +1,51 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2017 Patrick Rudolph + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include + +#include "h8.h" +#include "chip.h" + +static char *h8_dsdt_scope(struct device *dev, const char *scope) +{ + static char buf[DEVICE_PATH_MAX] = {}; + const char *path = acpi_device_path(dev); + + memset(buf, 0, sizeof(buf)); + snprintf(buf, sizeof(buf) - 1, "%s.%s", path, scope); + + return buf; +} + +/* + * Generates EC SSDT. + */ +void h8_ssdt_generator(struct device *dev) +{ + if (!acpi_device_path(dev)) + return; + + printk(BIOS_INFO, "ACPI: * H8\n"); + + /* Scope HKEY */ + acpigen_write_scope(h8_dsdt_scope(dev, "HKEY")); + + /* Used by thinkpad_acpi */ + acpigen_write_name_byte("HBDC", h8_has_bdc(dev) ? ONE_OP : ZERO_OP); + + acpigen_pop_len(); /* Scope HKEY */ +} -- cgit v1.2.3