ARM: shmobile: armadillo800eva: Reference DT implementation
Provide alternate board code for the Armadillo800EVA to demonstrate how DT may be used given the current state of driver device tree support. This is intended to act as a reference for mach-shmobile developers. This a rather bare bone version with the following devices supported: - GIC - irqpins - i2c0/1 - touchscreen Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Bastian Hecht
Simon Horman
parent
47016c7186
commit
76b92b4043
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@ -162,6 +162,7 @@ dtb-$(CONFIG_ARCH_U8500) += snowball.dtb \
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dtb-$(CONFIG_ARCH_SHMOBILE) += emev2-kzm9d.dtb \
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r8a7740-armadillo800eva.dtb \
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r8a7778-bockw.dtb \
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r8a7740-armadillo800eva-reference.dtb \
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r8a7779-marzen-reference.dtb \
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r8a7790-lager.dtb \
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sh73a0-kzm9g.dtb \
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@ -0,0 +1,45 @@
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/*
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* Reference Device Tree Source for the armadillo 800 eva board
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*
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* Copyright (C) 2012 Renesas Solutions Corp.
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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/dts-v1/;
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/include/ "r8a7740.dtsi"
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/ {
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model = "armadillo 800 eva reference";
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compatible = "renesas,armadillo800eva-reference", "renesas,r8a7740";
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chosen {
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bootargs = "console=tty0 console=ttySC1,115200 earlyprintk=sh-sci.1,115200 ignore_loglevel root=/dev/nfs ip=dhcp nfsroot=,rsize=4096,wsize=4096 rw";
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};
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memory {
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device_type = "memory";
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reg = <0x40000000 0x20000000>;
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};
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reg_3p3v: regulator@0 {
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compatible = "regulator-fixed";
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regulator-name = "fixed-3.3V";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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regulator-always-on;
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regulator-boot-on;
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};
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};
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&i2c0 {
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touchscreen: st1232@55 {
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compatible = "sitronix,st1232";
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reg = <0x55>;
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interrupt-parent = <&irqpin1>;
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interrupts = <2 0>; /* IRQ10: hwirq 2 on irqpin1 */
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};
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};
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@ -129,6 +129,20 @@ config MACH_ARMADILLO800EVA
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select SND_SOC_WM8978 if SND_SIMPLE_CARD
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select USE_OF
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config MACH_ARMADILLO800EVA_REFERENCE
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bool "Armadillo-800 EVA board - Reference Device Tree Implementation"
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depends on ARCH_R8A7740
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select ARCH_REQUIRE_GPIOLIB
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select REGULATOR_FIXED_VOLTAGE if REGULATOR
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select SND_SOC_WM8978 if SND_SIMPLE_CARD
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select USE_OF
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---help---
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Use reference implementation of Aramdillo800 EVA board support
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which makes a greater use of device tree at the expense
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of not supporting a number of devices.
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This is intended to aid developers
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config MACH_BOCKW
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bool "BOCK-W platform"
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depends on ARCH_R8A7778
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@ -46,6 +46,7 @@ obj-$(CONFIG_MACH_MARZEN) += board-marzen.o
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obj-$(CONFIG_MACH_MARZEN_REFERENCE) += board-marzen-reference.o
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obj-$(CONFIG_MACH_LAGER) += board-lager.o
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obj-$(CONFIG_MACH_ARMADILLO800EVA) += board-armadillo800eva.o
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obj-$(CONFIG_MACH_ARMADILLO800EVA_REFERENCE) += board-armadillo800eva-reference.o
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obj-$(CONFIG_MACH_KZM9D) += board-kzm9d.o
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obj-$(CONFIG_MACH_KZM9G) += board-kzm9g.o
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obj-$(CONFIG_MACH_KZM9G_REFERENCE) += board-kzm9g-reference.o
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@ -0,0 +1,213 @@
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/*
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* armadillo 800 eva board support
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*
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* Copyright (C) 2012 Renesas Solutions Corp.
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* Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/io.h>
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#include <linux/pinctrl/machine.h>
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#include <mach/common.h>
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#include <mach/r8a7740.h>
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#include <asm/mach/arch.h>
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#include <asm/hardware/cache-l2x0.h>
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/*
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* CON1 Camera Module
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* CON2 Extension Bus
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* CON3 HDMI Output
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* CON4 Composite Video Output
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* CON5 H-UDI JTAG
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* CON6 ARM JTAG
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* CON7 SD1
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* CON8 SD2
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* CON9 RTC BackUp
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* CON10 Monaural Mic Input
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* CON11 Stereo Headphone Output
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* CON12 Audio Line Output(L)
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* CON13 Audio Line Output(R)
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* CON14 AWL13 Module
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* CON15 Extension
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* CON16 LCD1
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* CON17 LCD2
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* CON19 Power Input
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* CON20 USB1
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* CON21 USB2
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* CON22 Serial
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* CON23 LAN
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* CON24 USB3
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* LED1 Camera LED(Yellow)
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* LED2 Power LED (Green)
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* ED3-LED6 User LED(Yellow)
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* LED7 LAN link LED(Green)
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* LED8 LAN activity LED(Yellow)
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*/
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/*
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* DipSwitch
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*
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* SW1
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*
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* -12345678-+---------------+----------------------------
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* 1 | boot | hermit
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* 0 | boot | OS auto boot
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* -12345678-+---------------+----------------------------
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* 00 | boot device | eMMC
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* 10 | boot device | SDHI0 (CON7)
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* 01 | boot device | -
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* 11 | boot device | Extension Buss (CS0)
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* -12345678-+---------------+----------------------------
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* 0 | Extension Bus | D8-D15 disable, eMMC enable
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* 1 | Extension Bus | D8-D15 enable, eMMC disable
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* -12345678-+---------------+----------------------------
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* 0 | SDHI1 | COM8 disable, COM14 enable
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* 1 | SDHI1 | COM8 enable, COM14 disable
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* -12345678-+---------------+----------------------------
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* 0 | USB0 | COM20 enable, COM24 disable
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* 1 | USB0 | COM20 disable, COM24 enable
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* -12345678-+---------------+----------------------------
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* 00 | JTAG | SH-X2
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* 10 | JTAG | ARM
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* 01 | JTAG | -
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* 11 | JTAG | Boundary Scan
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*-----------+---------------+----------------------------
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*/
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/*
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* FSI-WM8978
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*
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* this command is required when playback.
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*
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* # amixer set "Headphone" 50
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*
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* this command is required when capture.
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*
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* # amixer set "Input PGA" 15
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* # amixer set "Left Input Mixer MicP" on
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* # amixer set "Left Input Mixer MicN" on
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* # amixer set "Right Input Mixer MicN" on
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* # amixer set "Right Input Mixer MicP" on
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*/
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/*
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* USB function
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*
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* When you use USB Function,
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* set SW1.6 ON, and connect cable to CN24.
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*
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* USBF needs workaround on R8A7740 chip.
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* These are a little bit complex.
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* see
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* usbhsf_power_ctrl()
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*/
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static const struct pinctrl_map eva_pinctrl_map[] = {
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/* SCIFA1 */
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PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.1", "pfc-r8a7740",
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"scifa1_data", "scifa1"),
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};
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static void __init eva_clock_init(void)
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{
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struct clk *system = clk_get(NULL, "system_clk");
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struct clk *xtal1 = clk_get(NULL, "extal1");
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struct clk *usb24s = clk_get(NULL, "usb24s");
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struct clk *fsibck = clk_get(NULL, "fsibck");
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if (IS_ERR(system) ||
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IS_ERR(xtal1) ||
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IS_ERR(usb24s) ||
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IS_ERR(fsibck)) {
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pr_err("armadillo800eva board clock init failed\n");
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goto clock_error;
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}
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/* armadillo 800 eva extal1 is 24MHz */
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clk_set_rate(xtal1, 24000000);
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/* usb24s use extal1 (= system) clock (= 24MHz) */
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clk_set_parent(usb24s, system);
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/* FSIBCK is 12.288MHz, and it is parent of FSI-B */
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clk_set_rate(fsibck, 12288000);
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clock_error:
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if (!IS_ERR(system))
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clk_put(system);
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if (!IS_ERR(xtal1))
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clk_put(xtal1);
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if (!IS_ERR(usb24s))
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clk_put(usb24s);
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if (!IS_ERR(fsibck))
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clk_put(fsibck);
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}
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/*
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* board init
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*/
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static void __init eva_init(void)
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{
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r8a7740_clock_init(MD_CK0 | MD_CK2);
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eva_clock_init();
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pinctrl_register_mappings(eva_pinctrl_map, ARRAY_SIZE(eva_pinctrl_map));
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r8a7740_pinmux_init();
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r8a7740_meram_workaround();
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/*
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* Touchscreen
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* TODO: Move reset GPIO over to .dts when we can reference it
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*/
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gpio_request_one(166, GPIOF_OUT_INIT_HIGH, NULL); /* TP_RST_B */
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#ifdef CONFIG_CACHE_L2X0
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/* Early BRESP enable, Shared attribute override enable, 32K*8way */
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l2x0_init(IOMEM(0xf0002000), 0x40440000, 0x82000fff);
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#endif
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r8a7740_add_standard_devices_dt();
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r8a7740_pm_init();
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}
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#define RESCNT2 IOMEM(0xe6188020)
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static void eva_restart(char mode, const char *cmd)
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{
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/* Do soft power on reset */
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writel((1 << 31), RESCNT2);
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}
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static const char *eva_boards_compat_dt[] __initdata = {
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"renesas,armadillo800eva-reference",
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NULL,
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};
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DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference")
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.map_io = r8a7740_map_io,
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.init_early = r8a7740_init_delay,
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.init_irq = r8a7740_init_irq_of,
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.init_machine = eva_init,
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.init_time = shmobile_timer_init,
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.init_late = shmobile_init_late,
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.dt_compat = eva_boards_compat_dt,
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.restart = eva_restart,
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MACHINE_END
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