[RFC PATCH 12/12] platform/x86/of: add support for PC Engines APU v2/3/4 boards

Enrico Weigelt, metux IT consult
2021-02-08T22:28:13Z

Add oftree based support for PC Engines APUv2/3/4 board family.
This is entirely separate from the existing pcengines-apuv2 driver.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
---
drivers/platform/of/Kconfig | 15 ++++++++
drivers/platform/of/Makefile | 2 +
drivers/platform/of/apu2x.dts | 86 +++++++++++++++++++++++++++++++++++++++++++
drivers/platform/of/init.c | 7 ++++
4 files changed, 110 insertions(+)
create mode 100644 drivers/platform/of/apu2x.dts

diff --git a/drivers/platform/of/Kconfig b/drivers/platform/of/Kconfig
index a0b5a641a7c6..e13b6ee8c316 100644
--- a/drivers/platform/of/Kconfig
+++ b/drivers/platform/of/Kconfig
@@ -38,4 +38,19 @@ config PLATFORM_OF_DRV_SYSFS_DT
Say Y here to enable exposing device tree nodes at
/sys/firmware/devicetree.

+config PLATFORM_OF_DRV_PCENGINES_APU2
+ bool "Support PC Engines APU2/3/4 mainboards"
+ depends on INPUT
+ depends on GPIOLIB
+ depends on X86
+ select GPIO_AMD_FCH
+ select KEYBOARD_GPIO_POLLED
+ select LEDS_GPIO
+ select INPUT_KEYBOARD
+ help
+ Say Y to enable devicetree based support for PC Engines APU2/3/4
+ mainboards. This supersedes the older pcengines-apu2 driver.
+
+ Supports Gpios, front panel LEDs and front button.
+
endif # PLATFORM_OF_DRV
diff --git a/drivers/platform/of/Makefile b/drivers/platform/of/Makefile
index 84cf3003c500..dd4a13c18f16 100644
--- a/drivers/platform/of/Makefile
+++ b/drivers/platform/of/Makefile
@@ -2,4 +2,6 @@

ofboard-y := init.o drv.o

+ofboard-$(CONFIG_PLATFORM_OF_DRV_PCENGINES_APU2) += apu2x.dtb.o
+
obj-$(CONFIG_PLATFORM_OF_DRV) += ofboard.o
diff --git a/drivers/platform/of/apu2x.dts b/drivers/platform/of/apu2x.dts
new file mode 100644
index 000000000000..c16a59eb2a0e
--- /dev/null
+++ b/drivers/platform/of/apu2x.dts
@@ -0,0 +1,86 @@
+/dts-v1/;
+
+#include <dt-bindings/leds/common.h>
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+#include <dt-bindings/gpio/amd-fch-gpio.h>
+
+/ {
+ apu2x {
+ compatible = "virtual,dmi-board";
+ dmi-sys-vendor = "PC engines";
+ dmi-board-name =
+ "APU2",
+ "apu2",
+ "PC engines apu2",
+ "APU3",
+ "apu3",
+ "PC engines apu3",
+ "APU4",
+ "apu4",
+ "PC engines apu4";
+ unbind {
+ acpi = "PNP0076:00", "PNP0B00:00";
+ platform = "platform-framebuffer.0", "PNP0103:00";
+ };
+ devices {
+ gpio1: gpio1 {
+ compatible = "amd,fch-gpio";
+ gpio-controller;
+ status = "okay";
+ ngpios=<7>;
+ #gpio-cells=<2>;
+ gpio-regs = <
+ AMD_FCH_GPIO_REG_GPIO57 // led1
+ AMD_FCH_GPIO_REG_GPIO58 // led2
+ AMD_FCH_GPIO_REG_GPIO59_DEVSLP1 // led3
+ AMD_FCH_GPIO_REG_GPIO32_GE1 // modesw
+ AMD_FCH_GPIO_REG_GPIO33_GE2 // simawap
+ AMD_FCH_GPIO_REG_GPIO55_DEVSLP0 // mpcie2
+ AMD_FCH_GPIO_REG_GPIO51 // mpcie3
+ >;
+ gpio-line-names =
+ "front-led1",
+ "front-led2",
+ "front-led3",
+ "front-button",
+ "simswap",
+ "mpcie2_reset",
+ "mpcie3_reset";
+ };
+ front-leds {
+ compatible = "gpio-leds";
+ led@0 {
+ gpios = <&gpio1 0 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ default-state = "keep";
+ label = "apu:green:1";
+ };
+ led@1 {
+ gpios = <&gpio1 1 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ default-state = "keep";
+ label = "apu:green:2";
+ };
+ led@2 {
+ gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
+ color = <LED_COLOR_ID_GREEN>;
+ default-state = "keep";
+ label = "apu:green:3";
+ };
+ };
+ front-keys {
+ compatible = "gpio-keys-polled";
+ address-cells = <1>;
+ size-cells = <0>;
+ poll-interval = <100>;
+ button@1 {
+ linux,code = <KEY_RESTART>;
+ label = "front button";
+ debounce-interval = <10>;
+ gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
+ };
+ };
+ };
+ };
+};
diff --git a/drivers/platform/of/init.c b/drivers/platform/of/init.c
index 3b8373cda77a..195120dad26d 100644
--- a/drivers/platform/of/init.c
+++ b/drivers/platform/of/init.c
@@ -47,7 +47,14 @@ static ssize_t fdt_image_raw_read(struct file *filep, struct kobject *kobj,
return count;
}

+#ifdef CONFIG_PLATFORM_OF_DRV_PCENGINES_APU2
+DECLARE_FDT_EXTERN(apu2x);
+#endif
+
static struct fdt_image fdt[] = {
+#ifdef CONFIG_PLATFORM_OF_DRV_PCENGINES_APU2
+ FDT_IMAGE_ENT(apu2x)
+#endif
};

static int __init ofdrv_init_sysfs(struct fdt_image *image)
--
2.11.0