Adding Pimidi kernel module.

arch/arm/boot/dts/overlays/Makefile

@@ -203,6 +203,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	pifi-dac-zero.dtbo \
 	pifi-mini-210.dtbo \
 	piglow.dtbo \
+	pimidi.dtbo \
 	pineboards-hat-ai.dtbo \
 	pineboards-hatdrive-poe-plus.dtbo \
 	piscreen.dtbo \

arch/arm/boot/dts/overlays/README

@@ -3701,6 +3701,14 @@ Load:   dtoverlay=piglow
 Params: <None>
 
 
+Name:   pimidi
+Info:   Configures the Blokas Labs Pimidi card
+Load:   dtoverlay=pimidi,<param>=<val>
+Params: sel                     The position used for the sel rotary switch.
+                                Each unit in the stack must be set on a unique
+                                position. If param is omitted, sel=0 is assumed.
+
+
 Name:   pineboards-hat-ai
 Info:   Pineboards Hat Ai! overlay for the Google Coral Edge TPU
 Load:   dtoverlay=pineboards-hat-ai

arch/arm/boot/dts/overlays/pimidi-overlay.dts

@@ -0,0 +1,54 @@
+/*
+ * Pimidi Linux kernel module.
+ * Copyright (C) 2017-2024  Vilniaus Blokas UAB, https://blokas.io/
+ *
+ * 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.
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&i2c_arm>;
+		__overlay__ {
+			status = "okay";
+			clock-frequency=<1000000>;
+
+			pimidi_ctrl: pimidi_ctrl@20 {
+				compatible = "blokaslabs,pimidi";
+
+				reg = <0x20>;
+				status = "okay";
+
+				interrupt-parent = <&gpio>;
+				interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
+				interrupt-names = "data_ready";
+				interrupt-controller;
+				#interrupt-cells = <2>;
+
+				data-ready-gpios = <&gpio 23 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+				reset-gpios = <&gpio 22 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			};
+		};
+	};
+
+	__overrides__ {
+		sel = <&pimidi_ctrl>,"reg:0{0=0x20,1=0x21,2=0x22,3=0x23}",
+			<&pimidi_ctrl>,"data-ready-gpios:4{0=23,1=5,2=6,3=27}",
+			<&pimidi_ctrl>,"interrupts:0{0=23,1=5,2=6,3=27}";
+	};
+};

arch/arm/configs/bcm2709_defconfig

@@ -1058,6 +1058,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_BOSS2_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
 CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
+CONFIG_SND_PIMIDI=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_DACBERRY400=m
 CONFIG_SND_SOC_AD193X_SPI=m

arch/arm/configs/bcm2711_defconfig

@@ -1083,6 +1083,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_BOSS2_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
 CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
+CONFIG_SND_PIMIDI=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_DACBERRY400=m
 CONFIG_SND_SOC_AD193X_SPI=m

arch/arm/configs/bcmrpi_defconfig

@@ -1052,6 +1052,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_BOSS2_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
 CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
+CONFIG_SND_PIMIDI=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_SOC_AD193X_SPI=m
 CONFIG_SND_SOC_AD193X_I2C=m

arch/arm64/configs/bcm2711_defconfig

@@ -1126,6 +1126,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_BOSS2_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
 CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
+CONFIG_SND_PIMIDI=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_DACBERRY400=m
 CONFIG_SND_DESIGNWARE_I2S=m

arch/arm64/configs/bcm2712_defconfig

@@ -1129,6 +1129,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_BOSS2_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
 CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
+CONFIG_SND_PIMIDI=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_DACBERRY400=m
 CONFIG_SND_DESIGNWARE_I2S=m

arch/arm64/configs/bcmrpi3_defconfig

@@ -1025,6 +1025,7 @@ CONFIG_SND_BCM2708_SOC_ALLO_BOSS2_DAC=m
 CONFIG_SND_BCM2708_SOC_ALLO_DIGIONE=m
 CONFIG_SND_BCM2708_SOC_ALLO_KATANA_DAC=m
 CONFIG_SND_BCM2708_SOC_FE_PI_AUDIO=m
+CONFIG_SND_PIMIDI=m
 CONFIG_SND_PISOUND=m
 CONFIG_SND_DACBERRY400=m
 CONFIG_SND_SOC_AD193X_SPI=m

sound/drivers/Kconfig

@@ -263,4 +263,14 @@
 
 	  See SND_AC97_POWER_SAVE for more details.
 
+config SND_PIMIDI
+	tristate "Pimidi driver"
+	depends on SND_SEQUENCER && CRC8
+	select SND_RAWMIDI
+	help
+	  Say Y here to include support for Blokas Pimidi.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-pimidi.
+
 endif	# SND_DRIVERS

sound/drivers/Makefile

@@ -9,6 +9,7 @@ snd-aloop-objs := aloop.o
 snd-mtpav-objs := mtpav.o
 snd-mts64-objs := mts64.o
 snd-pcmtest-objs := pcmtest.o
+snd-pimidi-objs := pimidi.o
 snd-portman2x4-objs := portman2x4.o
 snd-serial-u16550-objs := serial-u16550.o
 snd-serial-generic-objs := serial-generic.o
@@ -23,6 +24,7 @@ obj-$(CONFIG_SND_SERIAL_U16550) += snd-serial-u16550.o
 obj-$(CONFIG_SND_SERIAL_GENERIC) += snd-serial-generic.o
 obj-$(CONFIG_SND_MTPAV) += snd-mtpav.o
 obj-$(CONFIG_SND_MTS64) += snd-mts64.o
+obj-$(CONFIG_SND_PIMIDI) += snd-pimidi.o
 obj-$(CONFIG_SND_PORTMAN2X4) += snd-portman2x4.o
 
 obj-$(CONFIG_SND) += opl3/ opl4/ mpu401/ vx/ pcsp/