From fa6e2eec15a58ce6a47ad7e8a3ccf3ef917cca35 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 1 Oct 2014 09:29:22 +0200 Subject: [PATCH] ARM: realview: basic device tree implementation This implements basic device tree boot support for the RealView platforms, with a basic device tree for ARM PB1176 as an example. The implementation is done with a new DT-specific board file using only pre-existing bindings for the basic IRQ, timer and serial port drivers. A new compatible type is added to the GIC for the ARM1176. This implementation uses the MFD syscon handle from day one to access the system controller registers, and register the devices using the SoC bus. Cc: Arnd Bergmann Cc: Rob Herring Acked-by: Jason Cooper Signed-off-by: Linus Walleij --- arch/arm/mach-realview/Kconfig | 13 +++++++++++ arch/arm/mach-realview/Makefile | 1 + arch/arm/mach-realview/realview-dt.c | 32 ++++++++++++++++++++++++++++ drivers/irqchip/irq-gic.c | 2 ++ 4 files changed, 48 insertions(+) create mode 100644 arch/arm/mach-realview/realview-dt.c diff --git a/arch/arm/mach-realview/Kconfig b/arch/arm/mach-realview/Kconfig index 9db2029aa632..565925f37dc5 100644 --- a/arch/arm/mach-realview/Kconfig +++ b/arch/arm/mach-realview/Kconfig @@ -1,6 +1,19 @@ menu "RealView platform type" depends on ARCH_REALVIEW +config REALVIEW_DT + bool "Support RealView(R) Device Tree based boot" + select ARM_GIC + select MFD_SYSCON + select POWER_RESET + select POWER_RESET_VERSATILE + select POWER_SUPPLY + select SOC_REALVIEW + select USE_OF + help + Include support for booting the ARM(R) RealView(R) evaluation + boards using a device tree machine description. + config MACH_REALVIEW_EB bool "Support RealView(R) Emulation Baseboard" select ARM_GIC diff --git a/arch/arm/mach-realview/Makefile b/arch/arm/mach-realview/Makefile index 541fa4c109ef..e07fdf7ae8a7 100644 --- a/arch/arm/mach-realview/Makefile +++ b/arch/arm/mach-realview/Makefile @@ -3,6 +3,7 @@ # obj-y := core.o +obj-$(CONFIG_REALVIEW_DT) += realview-dt.o obj-$(CONFIG_MACH_REALVIEW_EB) += realview_eb.o obj-$(CONFIG_MACH_REALVIEW_PB11MP) += realview_pb11mp.o obj-$(CONFIG_MACH_REALVIEW_PB1176) += realview_pb1176.o diff --git a/arch/arm/mach-realview/realview-dt.c b/arch/arm/mach-realview/realview-dt.c new file mode 100644 index 000000000000..cc28b89dd48f --- /dev/null +++ b/arch/arm/mach-realview/realview-dt.c @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2014 Linaro Ltd. + * + * Author: Linus Walleij + * + * 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 "core.h" + +static const char *realview_dt_platform_compat[] __initconst = { + "arm,realview-eb", + "arm,realview-pb1176", + "arm,realview-pb11mp", + "arm,realview-pba8", + "arm,realview-pbx", + NULL, +}; + +DT_MACHINE_START(REALVIEW_DT, "ARM RealView Machine (Device Tree Support)") +#ifdef CONFIG_ZONE_DMA + .dma_zone_size = SZ_256M, +#endif + .dt_compat = realview_dt_platform_compat, + .l2c_aux_val = 0x0, + .l2c_aux_mask = ~0x0, +MACHINE_END diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c index 38493ff28fa5..7f9be0785c6a 100644 --- a/drivers/irqchip/irq-gic.c +++ b/drivers/irqchip/irq-gic.c @@ -1041,6 +1041,8 @@ gic_of_init(struct device_node *node, struct device_node *parent) return 0; } IRQCHIP_DECLARE(gic_400, "arm,gic-400", gic_of_init); +IRQCHIP_DECLARE(arm11mp_gic, "arm,arm11mp-gic", gic_of_init); +IRQCHIP_DECLARE(arm1176jzf_dc_gic, "arm,arm1176jzf-devchip-gic", gic_of_init); IRQCHIP_DECLARE(cortex_a15_gic, "arm,cortex-a15-gic", gic_of_init); IRQCHIP_DECLARE(cortex_a9_gic, "arm,cortex-a9-gic", gic_of_init); IRQCHIP_DECLARE(cortex_a7_gic, "arm,cortex-a7-gic", gic_of_init);