OpenWrt – Rev 1
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From 0222de711db11507773604084e20ad6d6960d30b Mon Sep 17 00:00:00 2001
From: wavelet2 <a3d35232@btinternet.com>
Date: Mon, 26 Mar 2018 21:05:10 +0100
Subject: [PATCH 264/454] Add overlay for JEDEC SPI NOR flash
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 9 +
.../dts/overlays/jedec-spi-nor-overlay.dts | 309 ++++++++++++++++++
3 files changed, 319 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/jedec-spi-nor-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -55,6 +55,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
iqaudio-dac.dtbo \
iqaudio-dacplus.dtbo \
iqaudio-digi-wm8804-audio.dtbo \
+ jedec-spi-nor.dtbo \
justboom-dac.dtbo \
justboom-digi.dtbo \
lirc-rpi.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -939,6 +939,15 @@ Params: card_name Override
dai stream name.
+Name: jedec-spi-nor
+Info: Adds support for JEDEC-compliant SPI NOR flash devices. (Note: The
+ "jedec,spi-nor" kernel driver was formerly known as "m25p80".)
+Load: dtoverlay=jedec-spi-nor,<param>=<val>
+Params: flash-spi<n>-<m> Enables flash device on SPI<n>, CS#<m>.
+ flash-fastr-spi<n>-<m> Enables flash device with fast read capability
+ on SPI<n>, CS#<m>.
+
+
Name: justboom-dac
Info: Configures the JustBoom DAC HAT, Amp HAT, DAC Zero and Amp Zero audio
cards
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/jedec-spi-nor-overlay.dts
@@ -0,0 +1,309 @@
+// Overlay for JEDEC SPI-NOR Flash Devices (aka m25p80)
+
+// dtparams:
+// flash-spi<n>-<m> - Enables flash device on SPI<n>, CS#<m>.
+// flash-fastr-spi<n>-<m> - Enables flash device with fast read capability on SPI<n>, CS#<m>.
+//
+// If devices are present on SPI1 or SPI2, those interfaces must be enabled with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
+//
+// Example: A single flash device with fast read capability on SPI0, CS#0:
+// dtoverlay=jedec-spi-nor:flash-fastr-spi0-0
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
+
+ // disable spi-dev on spi0.0
+ fragment@0 {
+ target = <&spidev0>;
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // disable spi-dev on spi0.1
+ fragment@1 {
+ target = <&spidev1>;
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // disable spi-dev on spi1.0
+ fragment@2 {
+ target-path = "spi1/spidev@0";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // disable spi-dev on spi1.1
+ fragment@3 {
+ target-path = "spi1/spidev@1";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // disable spi-dev on spi1.2
+ fragment@4 {
+ target-path = "spi1/spidev@2";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // disable spi-dev on spi2.0
+ fragment@5 {
+ target-path = "spi2/spidev@0";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // disable spi-dev on spi2.1
+ fragment@6 {
+ target-path = "spi2/spidev@1";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // disable spi-dev on spi2.2
+ fragment@7 {
+ target-path = "spi2/spidev@2";
+ __dormant__ {
+ status = "disabled";
+ };
+ };
+
+ // enable flash on spi0.0
+ fragment@8 {
+ target = <&spi0>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_00: spi_nor@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // enable flash on spi0.1
+ fragment@9 {
+ target = <&spi0>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_01: spi_nor@1 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <1>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // enable flash on spi1.0
+ fragment@10 {
+ target = <&spi1>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_10: spi_nor@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // enable flash on spi1.1
+ fragment@11 {
+ target = <&spi1>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_11: spi_nor@1 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <1>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // enable flash on spi1.2
+ fragment@12 {
+ target = <&spi1>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_12: spi_nor@2 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <2>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // enable flash on spi2.0
+ fragment@13 {
+ target = <&spi2>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_20: spi_nor@0 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <0>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // enable flash on spi2.1
+ fragment@14 {
+ target = <&spi2>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_21: spi_nor@1 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <1>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // enable flash on spi2.2
+ fragment@15 {
+ target = <&spi2>;
+ __dormant__ {
+ status = "okay";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ spi_nor_22: spi_nor@2 {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "jedec,spi-nor";
+ reg = <2>;
+ spi-max-frequency = <500000>;
+ };
+ };
+ };
+
+ // Enable fast read for device on spi0.0.
+ // Use default active low interrupt signalling.
+ fragment@16 {
+ target = <&spi_nor_00>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ // Enable fast read for device on spi0.1.
+ // Use default active low interrupt signalling.
+ fragment@17 {
+ target = <&spi_nor_01>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ // Enable fast read for device on spi1.0.
+ // Use default active low interrupt signalling.
+ fragment@18 {
+ target = <&spi_nor_10>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ // Enable fast read for device on spi1.1.
+ // Use default active low interrupt signalling.
+ fragment@19 {
+ target = <&spi_nor_11>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ // Enable fast read for device on spi1.2.
+ // Use default active low interrupt signalling.
+ fragment@20 {
+ target = <&spi_nor_12>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ // Enable fast read for device on spi2.0.
+ // Use default active low interrupt signalling.
+ fragment@21 {
+ target = <&spi_nor_20>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ // Enable fast read for device on spi2.1.
+ // Use default active low interrupt signalling.
+ fragment@22 {
+ target = <&spi_nor_21>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ // Enable fast read for device on spi2.2.
+ // Use default active low interrupt signalling.
+ fragment@23 {
+ target = <&spi_nor_22>;
+ __dormant__ {
+ m25p,fast-read;
+ };
+ };
+
+ __overrides__ {
+ flash-spi0-0 = <0>,"+0+8";
+ flash-spi0-1 = <0>,"+1+9";
+ flash-spi1-0 = <0>,"+2+10";
+ flash-spi1-1 = <0>,"+3+11";
+ flash-spi1-2 = <0>,"+4+12";
+ flash-spi2-0 = <0>,"+5+13";
+ flash-spi2-1 = <0>,"+6+14";
+ flash-spi2-2 = <0>,"+7+15";
+ flash-fastr-spi0-0 = <0>,"+0+8+16";
+ flash-fastr-spi0-1 = <0>,"+1+9+17";
+ flash-fastr-spi1-0 = <0>,"+2+10+18";
+ flash-fastr-spi1-1 = <0>,"+3+11+19";
+ flash-fastr-spi1-2 = <0>,"+4+12+20";
+ flash-fastr-spi2-0 = <0>,"+5+13+21";
+ flash-fastr-spi2-1 = <0>,"+6+14+22";
+ flash-fastr-spi2-2 = <0>,"+7+15+23";
+ };
+};
+
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