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author | Tobias Diedrich <ranma+coreboot@tdiedrich.de> | 2015-06-13 13:29:50 +0200 |
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committer | Patrick Georgi <pgeorgi@google.com> | 2015-06-17 12:00:20 +0200 |
commit | 2a38551bb72765d37946c6f89fd48c0e9eec4580 (patch) | |
tree | 3fdb68f6516cb4baeb7ba56e9122aa17f3fffa32 /src/mainboard/pcengines/apu1/acpi/leds.asl | |
parent | 69139e0e2a55660d443e1a650ea0198361abe07b (diff) | |
download | coreboot-2a38551bb72765d37946c6f89fd48c0e9eec4580.tar.xz |
pcengines/apu1: Add ACPI led, button and GPIO devices.
Provide ACPI devices with devicetree-compatible annotations for the
three leds and the button of the APU1, as well as the GPIO driver.
This will cause the Linux kernel to automatically load the following
modules:
leds_gpio (CONFIG_LEDS_GPIO)
gpio_keys_polled (CONFIG_KEYBOARD_GPIO_POLLED)
gpio_sb8xx (CONFIG_GPIO_SB8XX)
See
http://events.linuxfoundation.org/sites/events/files/slides/ACPI_vs_DT.pdf
and https://lwn.net/Articles/612062/ for some more information on how
the PRP0001 HID works.
To make this usable a Linux GPIO driver for the AMD chipset is also
required, which I am currently working on, but have not submitted
upstream yet.
Leds have been named after the convention in
Documentation/leds/leds-class.txt:
LED Device Naming
=================
Is currently of the form:
"devicename:colour:function"
For comparison, on an OpenWRT device:
GPIOs 0-21, ath79:
gpio-1 (tp-link:green:usb ) out hi
gpio-2 (tp-link:green:system) out lo
gpio-3 (reset ) in hi
gpio-5 (tp-link:green:qss ) out lo
gpio-7 (qss ) in hi
gpio-9 (tp-link:green:wlan ) out lo
gpio-18 (rtl8366rb ) in hi
gpio-19 (rtl8366rb ) in hi
On the apu1:
GPIOs 288-511, platform/PRP0001:00, AMD SB8XX/SB9XX/A5X/A8X GPIO driver:
gpio-475 (switch1 ) in hi
gpio-477 (apu1:green:led1 ) out hi
gpio-478 (apu1:green:led2 ) out hi
gpio-479 (apu1:green:led3 ) out hi
Change-Id: I956ee92d9d98ef27a83ccb30d314543bd8634f2c
Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Reviewed-on: http://review.coreboot.org/10540
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Diffstat (limited to 'src/mainboard/pcengines/apu1/acpi/leds.asl')
-rw-r--r-- | src/mainboard/pcengines/apu1/acpi/leds.asl | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/mainboard/pcengines/apu1/acpi/leds.asl b/src/mainboard/pcengines/apu1/acpi/leds.asl new file mode 100644 index 0000000000..ce4a0c878b --- /dev/null +++ b/src/mainboard/pcengines/apu1/acpi/leds.asl @@ -0,0 +1,80 @@ +/* + * This file is part of the coreboot project. + * + * Based on the example of Mika Westerberg: https://lwn.net/Articles/612062/ + * + * Copyright (C) 2015 Tobias Diedrich, Mika Westerberg + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc. + */ + +Scope (\_SB.PCI0.SBUS) +{ + Device (LEDS) + { + Name (_HID, "PRP0001") + + Name (_CRS, ResourceTemplate () { + GpioIo (Exclusive, PullUp, 0, 0, IoRestrictionOutputOnly, + "\\_SB.PCI0.SBUS.GPIO", 0, ResourceConsumer) {189, 190, 191} + }) + + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"compatible", Package () {"gpio-leds"}}, + } + }) + + Device (LED1) + { + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + /* + * From Linux Documentation/leds/leds-class.txt: + * LED Device Naming + * Is currently of the form: + * "devicename:colour:function" + */ + Package () {"label", "apu1:green:led1"}, + Package () {"gpios", Package () {^^LEDS, 0, 0, 1 /* low-active */}}, + Package () {"default-state", "keep"}, + } }) } + + Device (LED2) + { + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"label", "apu1:green:led2"}, + Package () {"gpios", Package () {^^LEDS, 0, 1, 1 /* low-active */}}, + Package () {"default-state", "keep"}, + } + }) + } + + Device (LED3) + { + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package () {"label", "apu1:green:led3"}, + Package () {"gpios", Package () {^^LEDS, 0, 2, 1 /* low-active */}}, + Package () {"default-state", "keep"}, + } + }) + } + } +} |