[PATCH v5 2/2] arm: pxa27x: support for ICP DAS LP-8x4x w/ DT

From: Sergei Ianovich
Date: Tue Dec 15 2015 - 11:28:32 EST

ICP DAS calls LP-8x4x 'programmable automation controller'. It is
an industrial computer based on PXA270 SoC. They ship it with a 2.6.19
kernel and proprietary kernel module and userspace library to access
its industrial IO.

This patch allows to boot a modern kernel with device tree on
the device. It adds support for:
* MMC card interface on PXA270
* USB 1.1 port on PXA270
* 2 NOR flash devices
* 2 onboard ethernet Davicom DM9000 devices
* 3 serial UART ports on PXA270
* front panel red LED
* 64bit 1-wire system ID chip
* 16 kiB EEPROM (reading)

Support for these devices will be added in separate patches, since
they are not currently supported by the kernel:
* DS1302 RTC
* 512kiB SRAM
* FPGA irq chip
* 3 built-in 16550A serial UART ports
* industrial IO parallel bus
* 10 position rotary switch
* 8 pin DIP switch
* 16 kiB EEPROM (writing)
* serial interface for digital and analog industrial IO modules on
parallel bus (all I-87xxx modules)
* digital and analog industrial IO modules for parallel bus:
** I-8024 4 port analog output
** I-8041 32 port digital output
** I-8042 16 port digital output/16 port digital input

Not supported for now:
* VGA interface on PXA270 for lack of dts binding
* the rest of parallel bus (I-8xxx) modules for lack of hardware
* GPIO reset for lack of relevance (watchdog reset is working)

Newer LP-8x4x devices have twice as much flash and a different
partition structure otherwise being the same. When each device
is provided with a correct device tree, all of them can be booted
using the same kernel.

Signed-off-by: Sergei Ianovich <ynvich@xxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
CC: Daniel Mack <zonque@xxxxxxxxx>
CC: Robert Jarzmik <robert.jarzmik@xxxxxxx>
CC: Arnd Bergmann <arnd@xxxxxxxx>
---
v4..v5
fixes to apply Rob Herring's "Acked-by":
* provide board compatible string
* remove unused include directive in pxa27x-lp8x4x.dts

v3..v4
* support for newer flavor w/ 96Mb flash memory
* use 'partitions' subnodes
* move device-specific tweaking to device .dts file and drop
patches to pxa27x.dtsi

v2..v3
* added extbus which maps synchronous, static, and variable-latency
I/O (VLIO) interfaces of PXA27x SoC as suggested by Arnd Bergmann
* map is placed into platform include
* configured existing kernel drivers to support:
- front panel LED using gpio-leds
- 64bit 1-wire system ID chip using w1-gpio
- 16 kiB EEPROM using at24 over i2c-gpio
* number change (06/16 -> 08/21)

v1..v2
* drop left-over extern declaration
* use of_have_populated_dt() instead of a static variable
* drop wildcards in compatible
* drop machine-special machine description
* number changed from 9 to 6 (dropped patches)

.../devicetree/bindings/vendor-prefixes.txt | 1 +
arch/arm/boot/dts/Makefile | 3 +
arch/arm/boot/dts/pxa27x-lp8x4x-i105.dts | 50 ++++
arch/arm/boot/dts/pxa27x-lp8x4x.dts | 259 +++++++++++++++++++++
arch/arm/configs/lp8x4x_defconfig | 176 ++++++++++++++
5 files changed, 489 insertions(+)
create mode 100644 arch/arm/boot/dts/pxa27x-lp8x4x-i105.dts
create mode 100644 arch/arm/boot/dts/pxa27x-lp8x4x.dts
create mode 100644 arch/arm/configs/lp8x4x_defconfig

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index 55df1d4..2f1b078 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -109,6 +109,7 @@ honeywell Honeywell
hp Hewlett Packard
i2se I2SE GmbH
ibm International Business Machines (IBM)
+icpdas ICP DAS CO., LTD.
idt Integrated Device Technologies, Inc.
iom Iomega Corporation
img Imagination Technologies Ltd.
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 30bbc37..ed182ea 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -499,6 +499,9 @@ dtb-$(CONFIG_ARCH_ORION5X) += \
orion5x-rd88f5182-nas.dtb
dtb-$(CONFIG_ARCH_PRIMA2) += \
prima2-evb.dtb
+dtb-$(CONFIG_MACH_PXA27X_DT) += \
+ pxa27x-lp8x4x.dtb \
+ pxa27x-lp8x4x-i105.dtb
dtb-$(CONFIG_ARCH_QCOM) += \
qcom-apq8064-cm-qs600.dtb \
qcom-apq8064-ifc6410.dtb \
diff --git a/arch/arm/boot/dts/pxa27x-lp8x4x-i105.dts b/arch/arm/boot/dts/pxa27x-lp8x4x-i105.dts
new file mode 100644
index 0000000..903f5c7
--- /dev/null
+++ b/arch/arm/boot/dts/pxa27x-lp8x4x-i105.dts
@@ -0,0 +1,50 @@
+/* Device tree for ICP DAS LP-8x4x i105 flavor */
+
+#include "pxa27x-lp8x4x.dts"
+
+/ {
+ extbus {
+ flash@0 {
+ compatible = "cfi-flash";
+ reg = <0 0 0x04000000>;
+ bank-width = <4>;
+ device-width = <2>;
+
+ partitions {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ fs@0 {
+ label = "u-boot";
+ reg = <0 0x40000>;
+ };
+ fs@40000 {
+ label = "settings";
+ reg = <0x40000 0x40000>;
+ };
+ fs@80000 {
+ label = "device_tree";
+ reg = <0x80000 0x40000>;
+ };
+ fs@c0000 {
+ label = "kernel";
+ reg = <0xc0000 0x2c0000>;
+ };
+ fs@300000 {
+ label = "root_fs";
+ reg = <0x380000 0x3c80000>;
+ };
+ };
+ };
+
+ flash@1 {
+ compatible = "cfi-flash";
+ reg = <1 0x0 0x02000000>;
+ bank-width = <2>;
+ device-width = <1>;
+ partitions {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ };
+ };
+ };
+};
diff --git a/arch/arm/boot/dts/pxa27x-lp8x4x.dts b/arch/arm/boot/dts/pxa27x-lp8x4x.dts
new file mode 100644
index 0000000..7f33912c
--- /dev/null
+++ b/arch/arm/boot/dts/pxa27x-lp8x4x.dts
@@ -0,0 +1,259 @@
+/* Device tree for ICP DAS LP-8x4x */
+/dts-v1/;
+
+#include "pxa27x.dtsi"
+
+/ {
+ model = "ICP DAS LP-8x4x programmable automation controller";
+ compatible = "icpdas,lp8x4x", "marvell,pxa270";
+
+ aliases {
+ ethernet0 = &eth0;
+ ethernet1 = &eth1;
+ };
+
+ memory {
+ reg = <0xa0000000 0x08000000>;
+ };
+
+ regulators {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ vmmc: regulator@0 {
+ compatible = "regulator-fixed";
+ reg = <0>;
+ regulator-name = "vmmc";
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-always-on;
+ };
+ };
+
+ pxabus {
+ pxairq: interrupt-controller@40d00000 {
+ marvell,intc-priority;
+ marvell,intc-nr-irqs = <34>;
+ };
+
+ gpio: gpio@40e00000 {
+ interrupts = <8>, <9>, <10>;
+ interrupt-names = "gpio0", "gpio1", "gpio_mux";
+ };
+
+ uart@40100000 {
+ status = "okay";
+ };
+
+ uart@40200000 {
+ status = "okay";
+ };
+
+ uart@40700000 {
+ status = "okay";
+ };
+
+ mmc0: mmc@41100000 {
+ vmmc-supply = <&vmmc>;
+ status = "okay";
+ };
+
+ usb0: ohci@4c000000 {
+ marvell,port-mode = <3>;
+ marvell,oc-mode-perport;
+ marvell,enable-port1;
+ status = "okay";
+ };
+
+ leds {
+ compatible = "gpio-leds";
+
+ status {
+ gpios = <&gpio 84 1>;
+ linux,default-trigger = "heartbeat";
+ };
+ };
+
+ i2c: i2c-gpio {
+ compatible = "i2c-gpio";
+ gpios = <&gpio 22 0 /* sda */
+ &gpio 12 0 /* scl */>;
+ i2c-gpio,delay-us = <1>;
+ i2c-gpio,timeout-ms = <1>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eeprom@50 {
+ compatible = "atmel,24c128";
+ reg = <0x50>;
+ pagesize = <64>;
+ };
+ };
+
+ w1: w1-gpio {
+ compatible = "w1-gpio";
+ gpios = <&gpio 83 0>;
+ };
+ };
+
+ extbus {
+ /*
+ * PXA27x synchrous, static and
+ * variable-latency IO interfaces
+ */
+ compatible = "simple-bus";
+
+ #address-cells = <2>; /* first cell is nCS, second is address */
+ #size-cells = <1>;
+ ranges = <0 0 0 0x04000000
+ 1 0 0x04000000 0x04000000
+ 2 0 0x08000000 0x04000000
+ 3 0 0x0c000000 0x04000000
+ 4 0 0x10000000 0x04000000
+ 5 0 0x14000000 0x04000000>;
+
+ flash@0 {
+ compatible = "cfi-flash";
+ reg = <0 0 0x02000000>;
+ bank-width = <4>;
+ device-width = <2>;
+
+ partitions {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ fs@0 {
+ label = "u-boot";
+ reg = <0 0x40000>;
+ };
+ fs@40000 {
+ label = "settings";
+ reg = <0x40000 0x40000>;
+ };
+ fs@80000 {
+ label = "device_tree";
+ reg = <0x80000 0x40000>;
+ };
+ fs@c0000 {
+ label = "kernel";
+ reg = <0xc0000 0x240000>;
+ };
+ fs@300000 {
+ label = "root_fs";
+ reg = <0x300000 0x1d00000>;
+ };
+ };
+ };
+
+ flash@1 {
+ compatible = "cfi-flash";
+ reg = <1 0x0 0x01000000>;
+ bank-width = <2>;
+ device-width = <1>;
+ partitions {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ };
+ };
+
+ netio@3 {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 3 0 0x02000000>;
+ interrupt-parent = <&gpio>;
+
+ eth0: eth@0 {
+ compatible = "davicom,dm9000";
+ reg = <0x0 0x2
+ 0x4000 0x2>;
+ interrupts = <9 IRQ_TYPE_EDGE_RISING>;
+ status = "okay";
+ };
+
+ eth1: eth@1000000 {
+ compatible = "davicom,dm9000";
+ reg = <0x1000000 0x2
+ 0x1004000 0x2>;
+ interrupts = <82 IRQ_TYPE_EDGE_RISING>;
+ status = "okay";
+ };
+ };
+
+ fpga@5 {
+ compatible = "simple-bus";
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 5 0x3000000 0x10000>;
+ interrupt-parent = <&fpgairq>;
+
+ rtc@901c {
+ compatible = "dallas,rtc-ds1302";
+ reg = <0x901c 0x1>;
+ status = "okay";
+ };
+
+ sram@a000 {
+ compatible = "icpdas,sram-lp8x4x";
+ reg = <0xa000 0x1000
+ 0x901e 0x1>;
+
+ partitions {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ };
+ };
+
+ fpgairq: irq@9006 {
+ compatible = "icpdas,irq-lp8x4x";
+ reg = <0x9006 0x16>;
+ interrupt-parent = <&gpio>;
+ interrupts = <3 IRQ_TYPE_EDGE_FALLING>;
+ #interrupt-cells = <1>;
+ interrupt-controller;
+ status = "okay";
+ };
+
+ uart@9050 {
+ compatible = "icpdas,uart-lp8x4x";
+ reg = <0x9050 0x10
+ 0x9030 0x02>;
+ interrupts = <13>;
+ status = "okay";
+ };
+
+ uart@9060 {
+ compatible = "icpdas,uart-lp8x4x";
+ reg = <0x9060 0x10
+ 0x9032 0x02>;
+ interrupts = <14>;
+ status = "okay";
+ };
+
+ uart@9070 {
+ compatible = "icpdas,uart-lp8x4x";
+ reg = <0x9070 0x10
+ 0x9034 0x02>;
+ interrupts = <15>;
+ status = "okay";
+ };
+
+ backplane {
+ compatible = "icpdas,backplane-lp8x4x";
+ reg = <0x0 0x2
+ 0x1000 0x10
+ 0x2000 0x10
+ 0x3000 0x10
+ 0x4000 0x10
+ 0x5000 0x10
+ 0x6000 0x10
+ 0x7000 0x10
+ 0x8000 0x10
+ 0x9002 0x2
+ 0x9004 0x2
+ 0x9046 0x2>;
+ eeprom-gpios = <&gpio 4 0>;
+ };
+ };
+ };
+};
diff --git a/arch/arm/configs/lp8x4x_defconfig b/arch/arm/configs/lp8x4x_defconfig
new file mode 100644
index 0000000..0eb87df
--- /dev/null
+++ b/arch/arm/configs/lp8x4x_defconfig
@@ -0,0 +1,176 @@
+# CONFIG_LOCALVERSION_AUTO is not set
+# CONFIG_SWAP is not set
+CONFIG_SYSVIPC=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_RCU_BOOST=y
+CONFIG_LOG_BUF_SHIFT=14
+CONFIG_NAMESPACES=y
+# CONFIG_UTS_NS is not set
+# CONFIG_IPC_NS is not set
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+# CONFIG_UID16 is not set
+# CONFIG_SHMEM is not set
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_SLOB=y
+CONFIG_JUMP_LABEL=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_MODVERSIONS=y
+# CONFIG_LBDAF is not set
+CONFIG_BLK_CMDLINE_PARSER=y
+CONFIG_PARTITION_ADVANCED=y
+# CONFIG_EFI_PARTITION is not set
+# CONFIG_IOSCHED_DEADLINE is not set
+CONFIG_ARCH_PXA=y
+CONFIG_MACH_PXA27X_DT=y
+# CONFIG_ARM_THUMB is not set
+CONFIG_PREEMPT=y
+CONFIG_AEABI=y
+# CONFIG_COMPACTION is not set
+# CONFIG_CROSS_MEMORY_ATTACH is not set
+CONFIG_ZBOOT_ROM_TEXT=0x0
+CONFIG_ZBOOT_ROM_BSS=0x0
+CONFIG_CMDLINE="init=/sbin/init root=/dev/mmcblk0p1 rw rootfstype=ext4 console=ttyS0,115200 mem=128M rootwait"
+# CONFIG_SUSPEND is not set
+CONFIG_NET=y
+CONFIG_PACKET=y
+CONFIG_UNIX=y
+CONFIG_INET=y
+CONFIG_IP_PNP=y
+CONFIG_IP_PNP_BOOTP=y
+CONFIG_BRIDGE=m
+CONFIG_BRIDGE_VLAN_FILTERING=y
+CONFIG_VLAN_8021Q=m
+CONFIG_VLAN_8021Q_GVRP=y
+CONFIG_VLAN_8021Q_MVRP=y
+# CONFIG_WIRELESS is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_FW_LOADER is not set
+CONFIG_MTD=y
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_BLOCK=y
+CONFIG_MTD_CFI=y
+CONFIG_MTD_CFI_ADV_OPTIONS=y
+CONFIG_MTD_CFI_GEOMETRY=y
+CONFIG_MTD_CFI_INTELEXT=y
+CONFIG_MTD_PHYSMAP_OF=y
+CONFIG_MTD_SRAM_LP8X4X=y
+CONFIG_PROC_DEVICETREE=y
+CONFIG_BLK_DEV_LOOP=y
+CONFIG_BLK_DEV_LOOP_MIN_COUNT=2
+CONFIG_EEPROM_AT24=m
+CONFIG_LP8X4X_BUS=m
+CONFIG_SCSI=y
+# CONFIG_SCSI_PROC_FS is not set
+CONFIG_BLK_DEV_SD=y
+# CONFIG_SCSI_LOWLEVEL is not set
+CONFIG_NETDEVICES=y
+CONFIG_BONDING=m
+CONFIG_MACVLAN=m
+CONFIG_MACVTAP=m
+CONFIG_TUN=m
+# CONFIG_NET_VENDOR_ARC is not set
+# CONFIG_NET_CADENCE is not set
+# CONFIG_NET_VENDOR_BROADCOM is not set
+# CONFIG_NET_VENDOR_CIRRUS is not set
+CONFIG_DM9000=y
+CONFIG_DM9000_FORCE_SIMPLE_PHY_POLL=y
+# CONFIG_NET_VENDOR_FARADAY is not set
+# CONFIG_NET_VENDOR_INTEL is not set
+# CONFIG_NET_VENDOR_MARVELL is not set
+# CONFIG_NET_VENDOR_MICREL is not set
+# CONFIG_NET_VENDOR_NATSEMI is not set
+# CONFIG_NET_VENDOR_SEEQ is not set
+# CONFIG_NET_VENDOR_SMSC is not set
+# CONFIG_NET_VENDOR_STMICRO is not set
+# CONFIG_NET_VENDOR_VIA is not set
+# CONFIG_NET_VENDOR_WIZNET is not set
+CONFIG_PPP=m
+CONFIG_PPP_BSDCOMP=m
+CONFIG_PPP_DEFLATE=m
+CONFIG_PPPOE=m
+CONFIG_PPP_ASYNC=m
+CONFIG_PPP_SYNC_TTY=m
+CONFIG_SLIP=m
+CONFIG_SLIP_COMPRESSED=y
+# CONFIG_WLAN is not set
+CONFIG_INPUT_MOUSEDEV_SCREEN_X=800
+CONFIG_INPUT_MOUSEDEV_SCREEN_Y=600
+CONFIG_INPUT_EVDEV=y
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_8250=y
+# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_SERIAL_8250_NR_UARTS=40
+CONFIG_SERIAL_8250_RUNTIME_UARTS=40
+CONFIG_SERIAL_8250_EXTENDED=y
+CONFIG_SERIAL_8250_MANY_PORTS=y
+CONFIG_SERIAL_8250_SHARE_IRQ=y
+CONFIG_SERIAL_8250_PXA=y
+CONFIG_SERIAL_8250_LP8X4X=m
+CONFIG_HW_RANDOM=y
+CONFIG_I2C=m
+# CONFIG_I2C_COMPAT is not set
+CONFIG_I2C_GPIO=m
+CONFIG_W1=m
+CONFIG_W1_MASTER_GPIO=m
+CONFIG_W1_SLAVE_SMEM=m
+# CONFIG_HWMON is not set
+CONFIG_WATCHDOG=y
+CONFIG_SA1100_WATCHDOG=m
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+CONFIG_FB=y
+CONFIG_FB_PXA=y
+CONFIG_FRAMEBUFFER_CONSOLE=y
+CONFIG_LOGO=y
+CONFIG_USB=m
+CONFIG_USB_OHCI_HCD=m
+CONFIG_USB_ACM=m
+CONFIG_USB_PRINTER=m
+CONFIG_USB_STORAGE=m
+CONFIG_USB_SERIAL=m
+CONFIG_MMC=y
+CONFIG_MMC_PXA=y
+CONFIG_NEW_LEDS=y
+CONFIG_LEDS_CLASS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_TRIGGERS=y
+CONFIG_LEDS_TRIGGER_HEARTBEAT=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_DRV_DS1302=y
+CONFIG_RTC_DRV_PXA=m
+# CONFIG_IOMMU_SUPPORT is not set
+CONFIG_DMA_ENGINE=y
+CONFIG_DMA_VIRTUAL_CHANNELS=y
+CONFIG_DMA_OF=y
+CONFIG_PXA_DMA=y
+CONFIG_EXT2_FS=m
+CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
+CONFIG_REISERFS_FS=m
+CONFIG_ISO9660_FS=m
+CONFIG_MSDOS_FS=y
+CONFIG_VFAT_FS=y
+CONFIG_NTFS_FS=m
+CONFIG_NTFS_RW=y
+CONFIG_JFFS2_FS=y
+CONFIG_JFFS2_COMPRESSION_OPTIONS=y
+CONFIG_NFS_FS=y
+CONFIG_NFS_V4=y
+CONFIG_ROOT_NFS=y
+CONFIG_CIFS=m
+CONFIG_CIFS_STATS=y
+CONFIG_CODA_FS=m
+CONFIG_NLS_DEFAULT="cp855"
+CONFIG_NLS_CODEPAGE_437=y
+CONFIG_NLS_CODEPAGE_855=y
+CONFIG_NLS_ISO8859_1=y
+CONFIG_NLS_UTF8=y
+CONFIG_PRINTK_TIME=y
--
2.6.2

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