| From 0663fefc701a07b0b066a5b5ad492d30253a6bd3 Mon Sep 17 00:00:00 2001 |
| From: Bastian Hecht <hechtb@gmail.com> |
| Date: Wed, 17 Apr 2013 12:34:06 +0200 |
| Subject: 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> |
| (cherry picked from commit 76b92b4043f2303b443645b5609a8867e8a8b5d7) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| --- |
| arch/arm/boot/dts/Makefile | 1 + |
| .../boot/dts/r8a7740-armadillo800eva-reference.dts | 45 +++++ |
| arch/arm/mach-shmobile/Kconfig | 14 ++ |
| arch/arm/mach-shmobile/Makefile | 1 + |
| .../board-armadillo800eva-reference.c | 213 +++++++++++++++++++++ |
| 5 files changed, 274 insertions(+) |
| create mode 100644 arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts |
| create mode 100644 arch/arm/mach-shmobile/board-armadillo800eva-reference.c |
| |
| diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile |
| index f0895c58..389725e5 100644 |
| --- a/arch/arm/boot/dts/Makefile |
| +++ b/arch/arm/boot/dts/Makefile |
| @@ -162,6 +162,7 @@ dtb-$(CONFIG_ARCH_U8500) += snowball.dtb \ |
| dtb-$(CONFIG_ARCH_SHMOBILE) += emev2-kzm9d.dtb \ |
| r8a7740-armadillo800eva.dtb \ |
| r8a7778-bockw.dtb \ |
| + r8a7740-armadillo800eva-reference.dtb \ |
| r8a7779-marzen-reference.dtb \ |
| r8a7790-lager.dtb \ |
| sh73a0-kzm9g.dtb \ |
| diff --git a/arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts b/arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts |
| new file mode 100644 |
| index 00000000..09ea22c2 |
| --- /dev/null |
| +++ b/arch/arm/boot/dts/r8a7740-armadillo800eva-reference.dts |
| @@ -0,0 +1,45 @@ |
| +/* |
| + * Reference Device Tree Source for the armadillo 800 eva board |
| + * |
| + * Copyright (C) 2012 Renesas Solutions Corp. |
| + * |
| + * This file is licensed under the terms of the GNU General Public License |
| + * version 2. This program is licensed "as is" without any warranty of any |
| + * kind, whether express or implied. |
| + */ |
| + |
| +/dts-v1/; |
| +/include/ "r8a7740.dtsi" |
| + |
| +/ { |
| + model = "armadillo 800 eva reference"; |
| + compatible = "renesas,armadillo800eva-reference", "renesas,r8a7740"; |
| + |
| + chosen { |
| + bootargs = "console=tty0 console=ttySC1,115200 earlyprintk=sh-sci.1,115200 ignore_loglevel root=/dev/nfs ip=dhcp nfsroot=,rsize=4096,wsize=4096 rw"; |
| + }; |
| + |
| + memory { |
| + device_type = "memory"; |
| + reg = <0x40000000 0x20000000>; |
| + }; |
| + |
| + reg_3p3v: regulator@0 { |
| + compatible = "regulator-fixed"; |
| + regulator-name = "fixed-3.3V"; |
| + regulator-min-microvolt = <3300000>; |
| + regulator-max-microvolt = <3300000>; |
| + regulator-always-on; |
| + regulator-boot-on; |
| + }; |
| + |
| +}; |
| + |
| +&i2c0 { |
| + touchscreen: st1232@55 { |
| + compatible = "sitronix,st1232"; |
| + reg = <0x55>; |
| + interrupt-parent = <&irqpin1>; |
| + interrupts = <2 0>; /* IRQ10: hwirq 2 on irqpin1 */ |
| + }; |
| +}; |
| diff --git a/arch/arm/mach-shmobile/Kconfig b/arch/arm/mach-shmobile/Kconfig |
| index 1a517e2f..c6fb9ec8 100644 |
| --- a/arch/arm/mach-shmobile/Kconfig |
| +++ b/arch/arm/mach-shmobile/Kconfig |
| @@ -129,6 +129,20 @@ config MACH_ARMADILLO800EVA |
| select SND_SOC_WM8978 if SND_SIMPLE_CARD |
| select USE_OF |
| |
| +config MACH_ARMADILLO800EVA_REFERENCE |
| + bool "Armadillo-800 EVA board - Reference Device Tree Implementation" |
| + depends on ARCH_R8A7740 |
| + select ARCH_REQUIRE_GPIOLIB |
| + select REGULATOR_FIXED_VOLTAGE if REGULATOR |
| + select SND_SOC_WM8978 if SND_SIMPLE_CARD |
| + select USE_OF |
| + ---help--- |
| + Use reference implementation of Aramdillo800 EVA board support |
| + which makes a greater use of device tree at the expense |
| + of not supporting a number of devices. |
| + |
| + This is intended to aid developers |
| + |
| config MACH_BOCKW |
| bool "BOCK-W platform" |
| depends on ARCH_R8A7778 |
| diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile |
| index 068f1dad..812de045 100644 |
| --- a/arch/arm/mach-shmobile/Makefile |
| +++ b/arch/arm/mach-shmobile/Makefile |
| @@ -46,6 +46,7 @@ obj-$(CONFIG_MACH_MARZEN) += board-marzen.o |
| obj-$(CONFIG_MACH_MARZEN_REFERENCE) += board-marzen-reference.o |
| obj-$(CONFIG_MACH_LAGER) += board-lager.o |
| obj-$(CONFIG_MACH_ARMADILLO800EVA) += board-armadillo800eva.o |
| +obj-$(CONFIG_MACH_ARMADILLO800EVA_REFERENCE) += board-armadillo800eva-reference.o |
| obj-$(CONFIG_MACH_KZM9D) += board-kzm9d.o |
| obj-$(CONFIG_MACH_KZM9G) += board-kzm9g.o |
| obj-$(CONFIG_MACH_KZM9G_REFERENCE) += board-kzm9g-reference.o |
| diff --git a/arch/arm/mach-shmobile/board-armadillo800eva-reference.c b/arch/arm/mach-shmobile/board-armadillo800eva-reference.c |
| new file mode 100644 |
| index 00000000..03b85fec |
| --- /dev/null |
| +++ b/arch/arm/mach-shmobile/board-armadillo800eva-reference.c |
| @@ -0,0 +1,213 @@ |
| +/* |
| + * armadillo 800 eva board support |
| + * |
| + * Copyright (C) 2012 Renesas Solutions Corp. |
| + * Copyright (C) 2012 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| + * |
| + * 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. |
| + * |
| + * You should have received a copy of the GNU General Public License |
| + * along with this program; if not, write to the Free Software |
| + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| + * |
| + */ |
| + |
| +#include <linux/clk.h> |
| +#include <linux/err.h> |
| +#include <linux/kernel.h> |
| +#include <linux/gpio.h> |
| +#include <linux/io.h> |
| +#include <linux/pinctrl/machine.h> |
| +#include <mach/common.h> |
| +#include <mach/r8a7740.h> |
| +#include <asm/mach/arch.h> |
| +#include <asm/hardware/cache-l2x0.h> |
| + |
| +/* |
| + * CON1 Camera Module |
| + * CON2 Extension Bus |
| + * CON3 HDMI Output |
| + * CON4 Composite Video Output |
| + * CON5 H-UDI JTAG |
| + * CON6 ARM JTAG |
| + * CON7 SD1 |
| + * CON8 SD2 |
| + * CON9 RTC BackUp |
| + * CON10 Monaural Mic Input |
| + * CON11 Stereo Headphone Output |
| + * CON12 Audio Line Output(L) |
| + * CON13 Audio Line Output(R) |
| + * CON14 AWL13 Module |
| + * CON15 Extension |
| + * CON16 LCD1 |
| + * CON17 LCD2 |
| + * CON19 Power Input |
| + * CON20 USB1 |
| + * CON21 USB2 |
| + * CON22 Serial |
| + * CON23 LAN |
| + * CON24 USB3 |
| + * LED1 Camera LED(Yellow) |
| + * LED2 Power LED (Green) |
| + * ED3-LED6 User LED(Yellow) |
| + * LED7 LAN link LED(Green) |
| + * LED8 LAN activity LED(Yellow) |
| + */ |
| + |
| +/* |
| + * DipSwitch |
| + * |
| + * SW1 |
| + * |
| + * -12345678-+---------------+---------------------------- |
| + * 1 | boot | hermit |
| + * 0 | boot | OS auto boot |
| + * -12345678-+---------------+---------------------------- |
| + * 00 | boot device | eMMC |
| + * 10 | boot device | SDHI0 (CON7) |
| + * 01 | boot device | - |
| + * 11 | boot device | Extension Buss (CS0) |
| + * -12345678-+---------------+---------------------------- |
| + * 0 | Extension Bus | D8-D15 disable, eMMC enable |
| + * 1 | Extension Bus | D8-D15 enable, eMMC disable |
| + * -12345678-+---------------+---------------------------- |
| + * 0 | SDHI1 | COM8 disable, COM14 enable |
| + * 1 | SDHI1 | COM8 enable, COM14 disable |
| + * -12345678-+---------------+---------------------------- |
| + * 0 | USB0 | COM20 enable, COM24 disable |
| + * 1 | USB0 | COM20 disable, COM24 enable |
| + * -12345678-+---------------+---------------------------- |
| + * 00 | JTAG | SH-X2 |
| + * 10 | JTAG | ARM |
| + * 01 | JTAG | - |
| + * 11 | JTAG | Boundary Scan |
| + *-----------+---------------+---------------------------- |
| + */ |
| + |
| +/* |
| + * FSI-WM8978 |
| + * |
| + * this command is required when playback. |
| + * |
| + * # amixer set "Headphone" 50 |
| + * |
| + * this command is required when capture. |
| + * |
| + * # amixer set "Input PGA" 15 |
| + * # amixer set "Left Input Mixer MicP" on |
| + * # amixer set "Left Input Mixer MicN" on |
| + * # amixer set "Right Input Mixer MicN" on |
| + * # amixer set "Right Input Mixer MicP" on |
| + */ |
| + |
| +/* |
| + * USB function |
| + * |
| + * When you use USB Function, |
| + * set SW1.6 ON, and connect cable to CN24. |
| + * |
| + * USBF needs workaround on R8A7740 chip. |
| + * These are a little bit complex. |
| + * see |
| + * usbhsf_power_ctrl() |
| + */ |
| + |
| +static const struct pinctrl_map eva_pinctrl_map[] = { |
| + /* SCIFA1 */ |
| + PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.1", "pfc-r8a7740", |
| + "scifa1_data", "scifa1"), |
| +}; |
| + |
| +static void __init eva_clock_init(void) |
| +{ |
| + struct clk *system = clk_get(NULL, "system_clk"); |
| + struct clk *xtal1 = clk_get(NULL, "extal1"); |
| + struct clk *usb24s = clk_get(NULL, "usb24s"); |
| + struct clk *fsibck = clk_get(NULL, "fsibck"); |
| + |
| + if (IS_ERR(system) || |
| + IS_ERR(xtal1) || |
| + IS_ERR(usb24s) || |
| + IS_ERR(fsibck)) { |
| + pr_err("armadillo800eva board clock init failed\n"); |
| + goto clock_error; |
| + } |
| + |
| + /* armadillo 800 eva extal1 is 24MHz */ |
| + clk_set_rate(xtal1, 24000000); |
| + |
| + /* usb24s use extal1 (= system) clock (= 24MHz) */ |
| + clk_set_parent(usb24s, system); |
| + |
| + /* FSIBCK is 12.288MHz, and it is parent of FSI-B */ |
| + clk_set_rate(fsibck, 12288000); |
| + |
| +clock_error: |
| + if (!IS_ERR(system)) |
| + clk_put(system); |
| + if (!IS_ERR(xtal1)) |
| + clk_put(xtal1); |
| + if (!IS_ERR(usb24s)) |
| + clk_put(usb24s); |
| + if (!IS_ERR(fsibck)) |
| + clk_put(fsibck); |
| +} |
| + |
| +/* |
| + * board init |
| + */ |
| +static void __init eva_init(void) |
| +{ |
| + |
| + r8a7740_clock_init(MD_CK0 | MD_CK2); |
| + eva_clock_init(); |
| + |
| + pinctrl_register_mappings(eva_pinctrl_map, ARRAY_SIZE(eva_pinctrl_map)); |
| + r8a7740_pinmux_init(); |
| + |
| + r8a7740_meram_workaround(); |
| + |
| + /* |
| + * Touchscreen |
| + * TODO: Move reset GPIO over to .dts when we can reference it |
| + */ |
| + gpio_request_one(166, GPIOF_OUT_INIT_HIGH, NULL); /* TP_RST_B */ |
| + |
| +#ifdef CONFIG_CACHE_L2X0 |
| + /* Early BRESP enable, Shared attribute override enable, 32K*8way */ |
| + l2x0_init(IOMEM(0xf0002000), 0x40440000, 0x82000fff); |
| +#endif |
| + |
| + r8a7740_add_standard_devices_dt(); |
| + r8a7740_pm_init(); |
| +} |
| + |
| +#define RESCNT2 IOMEM(0xe6188020) |
| +static void eva_restart(char mode, const char *cmd) |
| +{ |
| + /* Do soft power on reset */ |
| + writel((1 << 31), RESCNT2); |
| +} |
| + |
| +static const char *eva_boards_compat_dt[] __initdata = { |
| + "renesas,armadillo800eva-reference", |
| + NULL, |
| +}; |
| + |
| +DT_MACHINE_START(ARMADILLO800EVA_DT, "armadillo800eva-reference") |
| + .map_io = r8a7740_map_io, |
| + .init_early = r8a7740_init_delay, |
| + .init_irq = r8a7740_init_irq_of, |
| + .init_machine = eva_init, |
| + .init_time = shmobile_timer_init, |
| + .init_late = shmobile_init_late, |
| + .dt_compat = eva_boards_compat_dt, |
| + .restart = eva_restart, |
| +MACHINE_END |
| -- |
| 1.8.4.3.gca3854a |
| |
