From mboxrd@z Thu Jan 1 00:00:00 1970 From: thomas.abraham@linaro.org (Thomas Abraham) Date: Wed, 3 Aug 2011 00:08:28 +0100 Subject: [PATCH 3/4] arm: exynos4: Add a new Exynos4 device tree enabled machine In-Reply-To: <1312326509-2723-1-git-send-email-thomas.abraham@linaro.org> References: <1312326509-2723-1-git-send-email-thomas.abraham@linaro.org> Message-ID: <1312326509-2723-4-git-send-email-thomas.abraham@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add a new basic Exynos4 machine with device tree support that can boot on a Exynos4 processor based board and bring up the console. This acts as a stating point to add device tree support for Exynos4 architecture. Signed-off-by: Thomas Abraham --- Documentation/devicetree/bindings/arm/samsung.txt | 8 ++ arch/arm/mach-exynos4/Kconfig | 10 +++ arch/arm/mach-exynos4/Makefile | 1 + arch/arm/mach-exynos4/mach-exynos4-dt.c | 84 +++++++++++++++++++++ 4 files changed, 103 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/samsung.txt create mode 100644 arch/arm/mach-exynos4/mach-exynos4-dt.c diff --git a/Documentation/devicetree/bindings/arm/samsung.txt b/Documentation/devicetree/bindings/arm/samsung.txt new file mode 100644 index 0000000..ce4a1aa --- /dev/null +++ b/Documentation/devicetree/bindings/arm/samsung.txt @@ -0,0 +1,8 @@ +Samsung Exynos4 based SMDKV310 eval board + + SMDKV310 eval board is based on Samsung's Exynos4 processor architecture. + +Required root node properties: + - compatible = "samsung,smdkv310","samsung,exynos4" + (a) "samsung,smdkv310" - for Samsung's SMDKV310 eval board. + (b) "samsung,exynos4" - for boards based on Exynos4 architecture. diff --git a/arch/arm/mach-exynos4/Kconfig b/arch/arm/mach-exynos4/Kconfig index 0c77ab9..c29de4e 100644 --- a/arch/arm/mach-exynos4/Kconfig +++ b/arch/arm/mach-exynos4/Kconfig @@ -218,6 +218,16 @@ config MACH_NURI help Machine support for Samsung Mobile NURI Board. +config MACH_EXYNOS4_DT + bool "Samsung Exynos4 Machine using device tree" + select CPU_EXYNOS4210 + select USE_OF + select S3C_DEV_HSMMC + select S3C_DEV_HSMMC2 + select EXYNOS4_SETUP_SDHCI + help + Machine support for Samsung Exynos4 machine with device tree enabled. + endmenu comment "Configuration for HSMMC bus width" diff --git a/arch/arm/mach-exynos4/Makefile b/arch/arm/mach-exynos4/Makefile index b7fe1d7..d2bf5bf 100644 --- a/arch/arm/mach-exynos4/Makefile +++ b/arch/arm/mach-exynos4/Makefile @@ -30,6 +30,7 @@ obj-$(CONFIG_MACH_SMDKV310) += mach-smdkv310.o obj-$(CONFIG_MACH_ARMLEX4210) += mach-armlex4210.o obj-$(CONFIG_MACH_UNIVERSAL_C210) += mach-universal_c210.o obj-$(CONFIG_MACH_NURI) += mach-nuri.o +obj-$(CONFIG_MACH_EXYNOS4_DT) += mach-exynos4-dt.o # device support diff --git a/arch/arm/mach-exynos4/mach-exynos4-dt.c b/arch/arm/mach-exynos4/mach-exynos4-dt.c new file mode 100644 index 0000000..47c3892 --- /dev/null +++ b/arch/arm/mach-exynos4/mach-exynos4-dt.c @@ -0,0 +1,84 @@ +/* + * Samsung's Exynos4 device tree enabled machine. + * + * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * Copyright (c) 2010-2011 Linaro Ltd. + * www.linaro.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include +#include +#include +#include +#include + +#include +#include + +#include +#include +#include + +#include + +/* + * The following lookup table is used to override device names when devices + * are registered from device tree. This is temporarily added to enable + * device tree support addition for the Exynos4 architecture. + * + * For drivers that require platform data to be provided from the machine + * file, a platform data pointer can also be supplied along with the + * devices names. Usually, the platform data elements that cannot be parsed + * from the device tree by the drivers (example: function pointers) are + * supplied. But it should be noted that this is a temporary mechanism and + * at some point, the drivers should be capable of parsing all the platform + * data from the device tree. + */ +static const struct of_dev_auxdata exynos4_auxdata_lookup[] __initconst = { + OF_DEV_AUXDATA("samsung,s5pv310-uart", S5P_PA_UART0, + "s5pv210-uart.0", NULL), + OF_DEV_AUXDATA("samsung,s5pv310-uart", S5P_PA_UART1, + "s5pv210-uart.1", NULL), + OF_DEV_AUXDATA("samsung,s5pv310-uart", S5P_PA_UART2, + "s5pv210-uart.2", NULL), + OF_DEV_AUXDATA("samsung,s5pv310-uart", S5P_PA_UART3, + "s5pv210-uart.3", NULL), + {}, +}; + +static void __init exynos4_dt_map_io(void) +{ + s5p_init_io(NULL, 0, S5P_VA_CHIPID); + s3c24xx_init_clocks(24000000); +} + +static const struct of_device_id intc_of_match[] __initconst = { + { .compatible = "samsung,exynos4-gic", }, + {}, +}; + +static void __init exynos4_dt_machine_init(void) +{ + irq_domain_generate_simple(intc_of_match, EXYNOS4_PA_GIC_DIST, 0); + of_platform_populate(NULL, of_default_bus_match_table, + exynos4_auxdata_lookup, NULL); +} + +static char const *exynos4_dt_compat[] __initdata = { + "samsung,exynos4", + NULL +}; + +DT_MACHINE_START(SMDKV310, "Samsung Exynos4 DT") + /* Maintainer: Kukjin Kim */ + .init_irq = exynos4_init_irq, + .map_io = exynos4_dt_map_io, + .init_machine = exynos4_dt_machine_init, + .timer = &exynos4_timer, + .dt_compat = exynos4_dt_compat, +MACHINE_END -- 1.7.4.1