This one was inspired by a serie of commits published on Emcraft git repo: https://github.com/EmcraftSystems/linux-emcraft.git Entry commit: f014da1df860ad702d923c95cb97e068bd302cb0 RT75957. twr-k70f120m: basic support by: Alexander Potashev <aspotashev@xxxxxxxxxxx> Signed-off-by: Paul Osmialowski <pawelo@xxxxxxxxxxx> --- Documentation/devicetree/bindings/arm/fsl.txt | 6 +++++ arch/arm/Kconfig | 9 ++++++- arch/arm/Kconfig-nommu | 1 + arch/arm/Makefile | 1 + arch/arm/boot/dts/kinetis-twr-k70f120m.dts | 16 +++++++++++++ arch/arm/boot/dts/kinetis.dtsi | 5 ++++ arch/arm/mach-kinetis/Makefile | 5 ++++ arch/arm/mach-kinetis/Makefile.boot | 3 +++ arch/arm/mach-kinetis/idle.c | 27 +++++++++++++++++++++ arch/arm/mach-kinetis/kinetis.c | 34 +++++++++++++++++++++++++++ arch/arm/mm/Kconfig | 1 + 11 files changed, 107 insertions(+), 1 deletion(-) create mode 100644 arch/arm/boot/dts/kinetis-twr-k70f120m.dts create mode 100644 arch/arm/boot/dts/kinetis.dtsi create mode 100644 arch/arm/mach-kinetis/Makefile create mode 100644 arch/arm/mach-kinetis/Makefile.boot create mode 100644 arch/arm/mach-kinetis/idle.c create mode 100644 arch/arm/mach-kinetis/kinetis.c diff --git a/Documentation/devicetree/bindings/arm/fsl.txt b/Documentation/devicetree/bindings/arm/fsl.txt index 2a3ba73..36179fd 100644 --- a/Documentation/devicetree/bindings/arm/fsl.txt +++ b/Documentation/devicetree/bindings/arm/fsl.txt @@ -135,3 +135,9 @@ LS2085A ARMv8 based Simulator model Required root node properties: - compatible = "fsl,ls2085a-simu", "fsl,ls2085a"; +Freescale Kinetis SoC Device Tree Bindings +------------------------------------------ + +TWR-K70F120M Kinetis K70 based development board. +Required root node compatible properties: + - compatible = "fsl,kinetis-twr-k70f120m" diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index a750c14..9c89bdc 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -964,6 +964,13 @@ config ARCH_EFM32 Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko processors. +config ARCH_KINETIS + bool "Freescale Kinetis MCU" + depends on ARM_SINGLE_ARMV7M + select ARMV7M_SYSTICK + help + This enables support for the Freescale Kinetis MCUs + config ARCH_LPC18XX bool "NXP LPC18xx/LPC43xx" depends on ARM_SINGLE_ARMV7M @@ -1733,7 +1740,7 @@ source "mm/Kconfig" config FORCE_MAX_ZONEORDER int "Maximum zone order" if ARCH_SHMOBILE_LEGACY range 11 64 if ARCH_SHMOBILE_LEGACY - default "12" if SOC_AM33XX + default "12" if SOC_AM33XX || ARCH_KINETIS default "9" if SA1111 || ARCH_EFM32 default "11" help diff --git a/arch/arm/Kconfig-nommu b/arch/arm/Kconfig-nommu index d081fcb..4b9aab3 100644 --- a/arch/arm/Kconfig-nommu +++ b/arch/arm/Kconfig-nommu @@ -65,6 +65,7 @@ config ARM_MPU config COPY_VECTOR_TABLE_TO_SRAM_ADDR hex 'If non-zero, copy Vector Table to this SRAM Address' if CPU_V7M + default 0x20000000 if ARCH_KINETIS default 0x00000000 depends on CPU_V7M help diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 07ab3d2..e71fc01 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -170,6 +170,7 @@ machine-$(CONFIG_ARCH_IOP32X) += iop32x machine-$(CONFIG_ARCH_IOP33X) += iop33x machine-$(CONFIG_ARCH_IXP4XX) += ixp4xx machine-$(CONFIG_ARCH_KEYSTONE) += keystone +machine-$(CONFIG_ARCH_KINETIS) += kinetis machine-$(CONFIG_ARCH_KS8695) += ks8695 machine-$(CONFIG_ARCH_LPC18XX) += lpc18xx machine-$(CONFIG_ARCH_LPC32XX) += lpc32xx diff --git a/arch/arm/boot/dts/kinetis-twr-k70f120m.dts b/arch/arm/boot/dts/kinetis-twr-k70f120m.dts new file mode 100644 index 0000000..edccf37 --- /dev/null +++ b/arch/arm/boot/dts/kinetis-twr-k70f120m.dts @@ -0,0 +1,16 @@ +/* + * Device tree for TWR-K70F120M development board. + * + */ + +/dts-v1/; +#include "kinetis.dtsi" + +/ { + model = "Freescale TWR-K70F120M Development Kit"; + compatible = "fsl,kinetis-twr-k70f120m"; + + memory { + reg = <0x8000000 0x8000000>; + }; +}; diff --git a/arch/arm/boot/dts/kinetis.dtsi b/arch/arm/boot/dts/kinetis.dtsi new file mode 100644 index 0000000..93d2a8a --- /dev/null +++ b/arch/arm/boot/dts/kinetis.dtsi @@ -0,0 +1,5 @@ +/* + * Device tree for Freescale Kinetis SoC. + * + */ +#include "armv7-m.dtsi" diff --git a/arch/arm/mach-kinetis/Makefile b/arch/arm/mach-kinetis/Makefile new file mode 100644 index 0000000..e759d9e --- /dev/null +++ b/arch/arm/mach-kinetis/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Freescale Kinetis platform files +# + +obj-y += kinetis.o idle.o diff --git a/arch/arm/mach-kinetis/Makefile.boot b/arch/arm/mach-kinetis/Makefile.boot new file mode 100644 index 0000000..3b442ab --- /dev/null +++ b/arch/arm/mach-kinetis/Makefile.boot @@ -0,0 +1,3 @@ + zreladdr-y := 0x08008000 +params_phys-y := 0x08000100 +initrd_phys-y := 0x08100000 diff --git a/arch/arm/mach-kinetis/idle.c b/arch/arm/mach-kinetis/idle.c new file mode 100644 index 0000000..79d2e1c --- /dev/null +++ b/arch/arm/mach-kinetis/idle.c @@ -0,0 +1,27 @@ +/* + * arch/arm/mach-kinetis/idle.c + */ + +#include <linux/init.h> +#include <linux/io.h> +#include <asm/system_misc.h> +#include <asm/proc-fns.h> + +static void kinetis_idle(void) +{ + asm volatile ("wfi"); + + /* + * This is a dirty hack that invalidates the I/D bus cache + * on Kinetis K70. This must be done after idle. + */ + writel(readl(IOMEM(0xe0082000)) | 0x85000000, IOMEM(0xe0082000)); +} + +static int __init kinetis_idle_init(void) +{ + arm_pm_idle = kinetis_idle; + return 0; +} + +arch_initcall(kinetis_idle_init); diff --git a/arch/arm/mach-kinetis/kinetis.c b/arch/arm/mach-kinetis/kinetis.c new file mode 100644 index 0000000..45e15c6 --- /dev/null +++ b/arch/arm/mach-kinetis/kinetis.c @@ -0,0 +1,34 @@ +/* + * kinetis.c - Freescale Kinetis K70F120M Development Board + * + * Based on legacy pre-OF code by Alexander Potashev <aspotashev@xxxxxxxxxxx> + * + * (C) Copyright 2011, 2012 + * Emcraft Systems, <www.emcraft.com> + * Alexander Potashev <aspotashev@xxxxxxxxxxx> + * + * Copyright (C) 2015 Paul Osmialowski <pawelo@xxxxxxxxxxx> + * + * 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 <linux/kernel.h> +#include <linux/init.h> +#include <linux/of_platform.h> +#include <asm/v7m.h> +#include <asm/mach/arch.h> + +static const char *const kinetis_compat[] __initconst = { + "fsl,kinetis-twr-k70f120m", + NULL +}; + +/* + * Freescale Kinetis platform machine description + */ +DT_MACHINE_START(KINETIS, "Freescale Kinetis") + .dt_compat = kinetis_compat, + .restart = armv7m_restart, +MACHINE_END diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 7c6b976..121b580 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -609,6 +609,7 @@ config CPU_V7M_NUM_IRQ depends on CPU_V7M default 90 if ARCH_STM32 default 38 if ARCH_EFM32 + default 106 if ARCH_KINETIS default 112 if SOC_VF610 default 240 help -- 2.3.6 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
