diff options
| -rw-r--r-- | drivers/misc/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/misc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/misc/acpi-test.c | 61 |
3 files changed, 68 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 0f736f8bde..b76198b10a 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -35,4 +35,10 @@ config UBOOTVAR While it can be used standalone, it is best when coupled with corresponding filesystem driver. +config ACPI_TEST + bool "ACPI Test driver" + depends on ACPI + help + This is a simple Test driver to test the ACPI bus. + endmenu diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index bc1c01ea4d..4d92465a1e 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_SRAM) += sram.o obj-$(CONFIG_STATE_DRV) += state.o obj-$(CONFIG_DEV_MEM) += mem.o obj-$(CONFIG_UBOOTVAR) += ubootvar.o +obj-$(CONFIG_ACPI_TEST) += acpi-test.o diff --git a/drivers/misc/acpi-test.c b/drivers/misc/acpi-test.c new file mode 100644 index 0000000000..970b435a0e --- /dev/null +++ b/drivers/misc/acpi-test.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 Ahmad Fatoum + */ + +#include <common.h> +#include <init.h> +#include <acpi.h> + +static const char *profiles[] = { + "Unspecified", + "Desktop", + "Mobile", + "Workstation", + "Enterprise Server", + "SOHO Server", + "Applicance PC", + "Performance Server", + "Tablet", +}; + +static int acpi_test_probe(struct device_d *dev) +{ + const char *profile = "reserved"; + u8 *sdt; + u8 profileno; + + dev_dbg(dev, "driver initializing...\n"); + + sdt = (u8 __force *)dev_request_mem_region_by_name(dev, "SDT"); + if (IS_ERR(sdt)) { + dev_err(dev, "no SDT resource available: %s\n", strerrorp(sdt)); + return PTR_ERR(sdt); + } + + dev_dbg(dev, "SDT is at 0x%p\n", sdt); + + profileno = sdt[45]; + + if (profileno < ARRAY_SIZE(profiles)) + profile = profiles[profileno]; + + dev_info(dev, "PM profile is for '%s'\n", profile); + + return 0; +} + +static void acpi_test_remove(struct device_d *dev) +{ + dev_info(dev, "FADT driver removed\n"); +} + +static struct acpi_driver acpi_test_driver = { + .signature = "FACP", + .driver = { + .name = "acpi-test", + .probe = acpi_test_probe, + .remove = acpi_test_remove, + } +}; +device_acpi_driver(acpi_test_driver); |