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[178.255.168.63]) by mx.google.com with ESMTPS id gl11sm28057438wic.8.2013.03.25.06.53.38 (version=TLSv1.1 cipher=RC4-SHA bits=128/128); Mon, 25 Mar 2013 06:53:39 -0700 (PDT) From: Michal Simek To: linux-arm-kernel@lists.infradead.org, monstr@monstr.eu, Josh Cartwright , Steffen Trumtrar Subject: [PATCH 05/10] arm: zynq: Move slcr initialization to separate file Date: Mon, 25 Mar 2013 14:53:11 +0100 Message-Id: <1364219596-4954-5-git-send-email-michal.simek@xilinx.com> X-Mailer: git-send-email 1.7.9.7 In-Reply-To: <1364219596-4954-1-git-send-email-michal.simek@xilinx.com> References: <1364219596-4954-1-git-send-email-michal.simek@xilinx.com> X-Gm-Message-State: ALoCoQlp9zHQSCiUHG8iUUpfbB7ImBshb3+m5KUqzaQtruJkEWKi0FmFaIzQXYvXqcvB45/EKXAv X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130325_095342_098697_F68345A8 X-CRM114-Status: GOOD ( 17.73 ) X-Spam-Score: -1.9 (-) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-1.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Create separate slcr driver instead of pollute common code. Signed-off-by: Michal Simek --- arch/arm/mach-zynq/Makefile | 2 +- arch/arm/mach-zynq/common.c | 10 +------ arch/arm/mach-zynq/common.h | 3 ++ arch/arm/mach-zynq/slcr.c | 69 +++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 74 insertions(+), 10 deletions(-) create mode 100644 arch/arm/mach-zynq/slcr.c diff --git a/arch/arm/mach-zynq/Makefile b/arch/arm/mach-zynq/Makefile index 320faed..13ee09b 100644 --- a/arch/arm/mach-zynq/Makefile +++ b/arch/arm/mach-zynq/Makefile @@ -3,4 +3,4 @@ # # Common support -obj-y := common.o +obj-y := common.o slcr.o diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c index 13f9d8b..2734bd6 100644 --- a/arch/arm/mach-zynq/common.c +++ b/arch/arm/mach-zynq/common.c @@ -61,15 +61,7 @@ static void __init xilinx_init_machine(void) static void __init xilinx_zynq_timer_init(void) { - struct device_node *np; - void __iomem *slcr; - - np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-slcr"); - slcr = of_iomap(np, 0); - WARN_ON(!slcr); - - xilinx_zynq_clocks_init(slcr); - + slcr_init(); clocksource_of_init(); } diff --git a/arch/arm/mach-zynq/common.h b/arch/arm/mach-zynq/common.h index 38727a2..e30898a 100644 --- a/arch/arm/mach-zynq/common.h +++ b/arch/arm/mach-zynq/common.h @@ -17,6 +17,9 @@ #ifndef __MACH_ZYNQ_COMMON_H__ #define __MACH_ZYNQ_COMMON_H__ +extern int slcr_init(void); + +extern void __iomem *zynq_slcr_base; extern void __iomem *scu_base; #endif diff --git a/arch/arm/mach-zynq/slcr.c b/arch/arm/mach-zynq/slcr.c new file mode 100644 index 0000000..1883b70 --- /dev/null +++ b/arch/arm/mach-zynq/slcr.c @@ -0,0 +1,69 @@ +/* + * Xilinx SLCR driver + * + * Copyright (c) 2011-2013 Xilinx Inc. + * + * 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; either version + * 2 of the License, or (at your option) any later version. + * + * 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., 675 Mass Ave, Cambridge, MA + * 02139, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "common.h" + +#define SLCR_UNLOCK_MAGIC 0xDF0D +#define SLCR_UNLOCK 0x8 /* SCLR unlock register */ + +void __iomem *zynq_slcr_base; + +/** + * xslcr_init() + * Returns 0 on success, negative errno otherwise. + * + * Called early during boot from platform code to remap SLCR area. + */ +int __init slcr_init(void) +{ + struct device_node *np; + + np = of_find_compatible_node(NULL, NULL, "xlnx,zynq-slcr"); + if (!np) { + pr_err("%s: no slcr node found\n", __func__); + BUG(); + } + + zynq_slcr_base = of_iomap(np, 0); + if (!zynq_slcr_base) { + pr_err("%s: Unable to map I/O memory\n", __func__); + BUG(); + } + + /* unlock the SLCR so that registers can be changed */ + writel(SLCR_UNLOCK_MAGIC, zynq_slcr_base + SLCR_UNLOCK); + + pr_info("%s mapped to %p\n", np->name, zynq_slcr_base); + + xilinx_zynq_clocks_init(zynq_slcr_base); + + of_node_put(np); + + return 0; +}