From patchwork Thu Apr 9 20:04:13 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Agner X-Patchwork-Id: 459819 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 6003314016A for ; Fri, 10 Apr 2015 06:09:12 +1000 (AEST) Authentication-Results: ozlabs.org; dkim=fail reason="verification failed; unprotected key" header.d=agner.ch header.i=@agner.ch header.b=szWRn5Ff; dkim-adsp=none (unprotected policy); dkim-atps=neutral Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933332AbbDIUHk (ORCPT ); Thu, 9 Apr 2015 16:07:40 -0400 Received: from mail.kmu-office.ch ([178.209.48.109]:51423 "EHLO mail.kmu-office.ch" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933460AbbDIUEY (ORCPT ); Thu, 9 Apr 2015 16:04:24 -0400 Received: from trochilidae.agner.local (195-226-23-137.pool.cyberlink.ch [195.226.23.137]) by mail.kmu-office.ch (Postfix) with ESMTPSA id 89C6F5C0CEE; Thu, 9 Apr 2015 22:03:27 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=agner.ch; s=dkim; t=1428609807; bh=FbGF5XwyFT5FZ3W8sz/9mIXfCZvkt/3CZ0O0HelkbQU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=szWRn5FfP1x3q4pCZrhukhHv6O/iDXyvMbsiRvvx3ic6CF2WfipsDpDTYRZP80kQd Xkx8CSzBijIDvjaCBN999A8SS4UOPI6vrBLBbB7TVBY/ZanmuQcdlkLdNrVLAk7M+i hmACEioLUEwW3fI/Mgo6spKZRH3NFS/m5NLjQPj8= From: Stefan Agner To: shawn.guo@linaro.org, kernel@pengutronix.de, linux@arm.linux.org.uk, u.kleine-koenig@pengutronix.de, jason@lakedaemon.net, olof@lixom.net, arnd@arndb.de, daniel.lezcano@linaro.org, tglx@linutronix.de, mark.rutland@arm.com, pawel.moll@arm.com, robh+dt@kernel.org, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, marc.zyngier@arm.com, mcoquelin.stm32@gmail.com Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Stefan Agner Subject: [PATCH v5 09/11] ARM: vf610: enable Cortex-M4 configuration on Vybrid SoC Date: Thu, 9 Apr 2015 22:04:13 +0200 Message-Id: <1428609855-27657-10-git-send-email-stefan@agner.ch> X-Mailer: git-send-email 2.3.5 In-Reply-To: <1428609855-27657-1-git-send-email-stefan@agner.ch> References: <1428609855-27657-1-git-send-email-stefan@agner.ch> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org This patch allows to build the Kernel for Vybrid (VF6xx) SoC when ARMv7-M CPU is selected. The resulting image runs on the secondary Cortex-M4 core. This core has equally access to all peripherals as the main Cortex-A5 core. However, there is no resource control mechanism, hence when both cores are used simultaneously, orthogonal device tree's are required. The boot CPU is dependent on the SoC variant. The available boards use mostly variants where the Cortex-A5 is the primary and hence the boot CPU. Booting the secondary Cortex-M4 CPU needs SoC specific registers written. There is no in kernel support for this right now, a external userspace utility called "m4boot" can be used to boot the kernel: m4boot xipImage initramfs.cpio.lzo vf610m4-colibri.dtb Signed-off-by: Stefan Agner --- Documentation/devicetree/bindings/arm/fsl.txt | 3 +++ arch/arm/Kconfig.debug | 2 +- arch/arm/mach-imx/Kconfig | 38 ++++++++++++++++----------- arch/arm/mach-imx/Makefile.boot | 0 arch/arm/mach-imx/mach-vf610.c | 1 + 5 files changed, 28 insertions(+), 16 deletions(-) create mode 100644 arch/arm/mach-imx/Makefile.boot diff --git a/Documentation/devicetree/bindings/arm/fsl.txt b/Documentation/devicetree/bindings/arm/fsl.txt index a5462b6..2a3ba73 100644 --- a/Documentation/devicetree/bindings/arm/fsl.txt +++ b/Documentation/devicetree/bindings/arm/fsl.txt @@ -81,12 +81,15 @@ Freescale Vybrid Platform Device Tree Bindings For the Vybrid SoC familiy all variants with DDR controller are supported, which is the VF5xx and VF6xx series. Out of historical reasons, in most places the kernel uses vf610 to refer to the whole familiy. +The compatible string "fsl,vf610m4" is used for the secondary Cortex-M4 +core support. Required root node compatible property (one of them): - compatible = "fsl,vf500"; - compatible = "fsl,vf510"; - compatible = "fsl,vf600"; - compatible = "fsl,vf610"; + - compatible = "fsl,vf610m4"; Freescale LS1021A Platform Device Tree Bindings ------------------------------------------------ diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 970de75..2e55557 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -1573,7 +1573,7 @@ config DEBUG_UNCOMPRESS config UNCOMPRESS_INCLUDE string default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \ - PLAT_SAMSUNG || ARCH_EFM32 + PLAT_SAMSUNG || ARCH_EFM32 || SOC_VF610 default "mach/uncompress.h" config EARLY_PRINTK diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index c8dffce..aa8ad4a 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -1,5 +1,5 @@ menuconfig ARCH_MXC - bool "Freescale i.MX family" if ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7 + bool "Freescale i.MX family" if ARCH_MULTI_V4_V5 || ARCH_MULTI_V6_V7 || ARM_SINGLE_ARMV7M select ARCH_REQUIRE_GPIOLIB select ARM_CPU_SUSPEND if PM select CLKSRC_MMIO @@ -557,9 +557,11 @@ config MACH_VPR200 endif +comment "Device tree only" + if ARCH_MULTI_V7 -comment "Device tree only" +comment "Cortex-A platforms" config SOC_IMX5 bool @@ -629,10 +631,26 @@ config SOC_IMX6SX help This enables support for Freescale i.MX6 SoloX processor. + +config SOC_LS1021A + bool "Freescale LS1021A support" + select ARM_GIC + select HAVE_ARM_ARCH_TIMER + select PCI_DOMAINS if PCI + select ZONE_DMA if ARM_LPAE + + help + This enable support for Freescale LS1021A processor. + +endif + +comment "Cortex-A/Cortex-M asymmetric multiprocessing platforms" + +if ARCH_MULTI_V7 || ARM_SINGLE_ARMV7M + config SOC_VF610 bool "Vybrid Family VF610 support" - select IRQ_DOMAIN_HIERARCHY - select ARM_GIC + select ARM_GIC if ARCH_MULTI_V7 select PINCTRL_VF610 select PL310_ERRATA_769419 if CACHE_L2X0 @@ -645,7 +663,7 @@ choice default VF_USE_ARM_GLOBAL_TIMER config VF_USE_ARM_GLOBAL_TIMER - bool "Use ARM Global Timer" + bool "Use ARM Global Timer" if ARCH_MULTI_V7 select ARM_GLOBAL_TIMER select CLKSRC_ARM_GLOBAL_TIMER_SCHED_CLOCK help @@ -659,16 +677,6 @@ choice endchoice -config SOC_LS1021A - bool "Freescale LS1021A support" - select ARM_GIC - select HAVE_ARM_ARCH_TIMER - select PCI_DOMAINS if PCI - select ZONE_DMA if ARM_LPAE - - help - This enable support for Freescale LS1021A processor. - endif source "arch/arm/mach-imx/devices/Kconfig" diff --git a/arch/arm/mach-imx/Makefile.boot b/arch/arm/mach-imx/Makefile.boot new file mode 100644 index 0000000..e69de29 diff --git a/arch/arm/mach-imx/mach-vf610.c b/arch/arm/mach-imx/mach-vf610.c index 2e7c75b..b20f6c1 100644 --- a/arch/arm/mach-imx/mach-vf610.c +++ b/arch/arm/mach-imx/mach-vf610.c @@ -17,6 +17,7 @@ static const char * const vf610_dt_compat[] __initconst = { "fsl,vf510", "fsl,vf600", "fsl,vf610", + "fsl,vf610m4", NULL, };