控制ACPI表的Intel Edison GPIO问题

问题描述

我对ACPI表有一些疑问。我想在启动时控制Intel Edison默认GPIO，因此我使ACPI表对其进行控制。但是没有引起任何变化。这是我的ASL代码：

Device (DEV)
{
    Name (_HID,"PRP0001")
    Name (_DDN,"GPIO LEDs device")

    Name (_CRS,ResourceTemplate()
    {
            GpioIo (Shared,PullNone,0x0000,IoRestrictionOutputOnly,"\\_SB.PCI0.GPI0",0x00,ResourceConsumer,){12,13}
    })

    Name (_DSD,Package () {
        ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),Package () {
            Package () { "compatible",Package() { "gpio-leds" } },},ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),Package () {
            Package () {"led-0","LED0"},Package () {"led-1","LED1"},}
    })

    /*
     * For more information about these bindings see:
     * Documentation/devicetree/bindings/leds/common.yaml,* Documentation/devicetree/bindings/leds/leds-gpio.yaml and
     * Documentation/firmware-guide/acpi/gpio-properties.rst.
     */
     Name (LED0,Package () {
            ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),Package () {
                Package () {"label","green"},Package () {"default-state","off"},Package () {"gpios",Package () {^LEDS,0}},Package () {"retain-state-suspended",1},}
        })

     Name (LED1,"red"},1,}
        })
}

好像已加载了leds_test.aml。 这是我的/ sys / kernel / debug / gpio：

root@:~# cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-191,parent: pci/0000:00:0c.0,0000:00:0c.0:
gpio-47  (                    |?                   ) out hi
gpio-71  (                    |shutdown            ) out hi
gpio-77  (                    |sd_cd               ) in  hi IRQ
gpio-96  (                    |ACPI:OpRegion       ) out hi
gpio-110 (                    |cs                  ) out hi
gpio-111 (                    |cs                  ) out hi
gpio-112 (                    |cs                  ) out lo
gpio-113 (                    |cs                  ) out lo
gpio-184 (                    |device-wakeup       ) out lo
gpio-185 (                    |host-wakeup         ) in  lo IRQ


root@:~# dmesg | grep ACPI
[    0.002615] ACPI: Early table checksum verification disabled
[    0.002631] ACPI: RSDP 0x00000000000E4500 000024 (v02 U-BOOT)
[    0.002655] ACPI: XSDT 0x00000000000E45E0 00004C (v01 U-BOOT U-BOOTBL 20200909 INTL 00000000)
[    0.002688] ACPI: FACP 0x00000000000E5310 0000F4 (v06 U-BOOT U-BOOTBL 20200909 INTL 00000000)
[    0.002724] ACPI: DSDT 0x00000000000E4780 000A8A (v02 U-BOOT U-BOOTBL 00010000 INTL 20190215)
[    0.002749] ACPI: APIC 0x00000000000E5410 000048 (v04 U-BOOT U-BOOTBL 20200909 INTL 00000000)
[    0.002772] ACPI: MCFG 0x00000000000E5460 00003C (v01 U-BOOT U-BOOTBL 20200909 INTL 00000000)
[    0.002794] ACPI: CSRT 0x00000000000E54A0 000058 (v00 U-BOOT U-BOOTBL 20200909 INTL 00000000)
[    0.002817] ACPI: SPCR 0x00000000000E5500 000050 (v02 U-BOOT U-BOOTBL 20200909 INTL 00000000)
[    0.002866] ACPI: Local APIC address 0xfee00000
[    0.035260] ACPI: no legacy devices present
[    0.035266] ACPI: probing for VGA not safe
[    0.035281] ACPI: Local APIC address 0xfee00000
[    0.035303] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[    0.035315] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x02] enabled)
[    0.035338] ACPI: IOAPIC (id[0x02] address[0xfec00000] gsi_base[0])
[    0.035385] Using ACPI (MADT) for SMP configuration information
[    0.035400] ACPI: SPCR: console: uart,mmio,0xff010180
[    1.158446] ACPI: Core revision 20191018
[    1.182930] ACPI FADT declares the system doesn't support PCIe ASPM,so disable it
[    1.182938] ACPI: bus type PCI registered
[    1.215373] ACPI: Added _OSI(Module Device)
[    1.215771] ACPI: Added _OSI(Processor Device)
[    1.215778] ACPI: Added _OSI(3.0 _SCP Extensions)
[    1.215784] ACPI: Added _OSI(Processor Aggregator Device)
[    1.215793] ACPI: Added _OSI(Linux-Dell-Video)
[    1.215801] ACPI: Added _OSI(Linux-Lenovo-NV-HDMI-Audio)
[    1.215808] ACPI: Added _OSI(Linux-HPI-Hybrid-Graphics)
[    1.220700] ACPI: 1 ACPI AML tables successfully acquired and loaded
[    1.222647] ACPI: Interpreter enabled
[    1.222705] ACPI: (supports S0)
[    1.222740] ACPI: Using IOAPIC for interrupt routing
[    1.222853] PCI: Using host bridge windows from ACPI; if necessary,use "pci=nocrs" and report a bug
[    1.236360] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    1.266154] ACPI: bus type USB registered
[    2.126336] pnp: PnP ACPI init
[    2.126853] pnp 00:00: Plug and Play ACPI device,IDs PNP0b00 (active)
[    2.127373] system 00:01: Plug and Play ACPI device,IDs PNP0c02 (active)
[    2.128692] pnp: PnP ACPI: found 2 devices
[    3.028011] ACPI: Host-directed Dynamic ACPI Table Load:
[    3.028045] ACPI: SSDT 0xFFFF8B1279103A80 0000A6 (v05        SPIDEV   00000001 INTL 20190215)
[    3.059576] ACPI: Host-directed Dynamic ACPI Table Load:
[    3.059611] ACPI: SSDT 0xFFFF8B12792C4C00 00016D (v05        LEDS     00000001 INTL 20190215)
[    3.112334] ACPI: Host-directed Dynamic ACPI Table Load:
[    3.112367] ACPI: SSDT 0xFFFF8B12793D6B00 0000E5 (v05        i2c      00000001 INTL 20190215)

但是我还没有打开我的LED，并且我还要确保在我的内核配置和构建内核中确保CONFIG_LEDS_GPIO = y和CONFIG_LEDS_CLASS = y。

解决方法

遵循此leds.asli并尝试创建现在可以使用的测试示例。

示例：

Device (DEV)
{
    Name (_HID,"PRP0001")
    Name (_DDN,"GPIO LEDs device")

    Name (_CRS,ResourceTemplate()
    {
            GpioIo (Shared,PullNone,0x0000,IoRestrictionOutputOnly,"\\_SB.PCI0.GPI0",0x00,ResourceConsumer,){12,13}
    })

    Name (_DSD,Package () {
        ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),Package () {
            Package () { "compatible",Package() { "gpio-leds" } },},ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),Package () {
            Package () {"led-0","LED0"},Package () {"led-1","LED1"},}
    })

    /*
     * For more information about these bindings see:
     * Documentation/devicetree/bindings/leds/common.yaml,* Documentation/devicetree/bindings/leds/leds-gpio.yaml and
     * Documentation/firmware-guide/acpi/gpio-properties.rst.
     */
     Name (LED0,Package () {
            ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),Package () {
                Package () {"label","green"},Package () {"default-state","off"},Package () {"gpios",Package () {^LEDS,0}},Package () {"retain-state-suspended",1},}
        })

     Name (LED1,"red"},1,}
        })
}

/ sys / kernel / debug / gpio：

root@:~# cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-191,parent: pci/0000:00:0c.0,0000:00:0c.0:
gpio-12  (                    |green               ) out lo
gpio-13  (                    |red                 ) out lo
gpio-71  (                    |shutdown            ) out hi
gpio-77  (                    |sd_cd               ) in  hi IRQ
gpio-96  (                    |ACPI:OpRegion       ) out hi
gpio-110 (                    |cs                  ) out hi
gpio-111 (                    |cs                  ) out hi
gpio-112 (                    |cs                  ) out lo
gpio-113 (                    |cs                  ) out lo
gpio-184 (                    |device-wakeup       ) out lo
gpio-185 (                    |host-wakeup         ) in  lo IRQ