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

[Sergei Ianovich <ynvich@gmail.com>]

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@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
CC: Daniel Mack <zonque@gmail.com>
CC: Robert Jarzmik <robert.jarzmik@free.fr>
CC: Arnd Bergmann <arnd@arndb.de>
---
   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