From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from relay5-d.mail.gandi.net ([217.70.183.197]) by casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1icVKT-0007Gl-9c for barebox@lists.infradead.org; Wed, 04 Dec 2019 14:08:35 +0000 Received: from geraet.pengutronix.de (hazel.nat.pengutronix.de [85.220.165.66]) (Authenticated sender: ahmad@a3f.at) by relay5-d.mail.gandi.net (Postfix) with ESMTPSA id 781AD1C0011 for ; Wed, 4 Dec 2019 14:07:27 +0000 (UTC) From: Ahmad Fatoum Date: Wed, 4 Dec 2019 15:07:21 +0100 Message-Id: <20191204140721.20299-3-ahmad@a3f.at> In-Reply-To: <20191204140721.20299-1-ahmad@a3f.at> References: <20191204140721.20299-1-ahmad@a3f.at> MIME-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 2/2] misc: add ACPI test driver To: barebox@lists.infradead.org We have a bus driver for ACPI, but no drivers yet. Add a simple (rather useless) driver that exercises the API, which future drivers can be based on. As soon as we have proper ACPI drivers, this driver could be removed again. Signed-off-by: Ahmad Fatoum --- drivers/misc/Kconfig | 6 ++++ drivers/misc/Makefile | 1 + drivers/misc/acpi-test.c | 61 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 68 insertions(+) create mode 100644 drivers/misc/acpi-test.c diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 0f736f8bded3..b76198b10af5 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 bc1c01ea4d67..4d92465a1e5e 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 000000000000..970b435a0eec --- /dev/null +++ b/drivers/misc/acpi-test.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 Ahmad Fatoum + */ + +#include +#include +#include + +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); -- 2.20.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox