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Commit 64b889b3 authored by Michal Simek's avatar Michal Simek
Browse files

arm: zynq: Move slcr initialization to separate file 



Create separate slcr driver instead of polluting common code.

Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
parent 732078c3

arch/arm/mach-zynq/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -3,4 +3,4 @@ 
#



# Common support

obj-y				:= common.o
 
obj-y				:= common.o slcr.o

arch/arm/mach-zynq/common.c

+1 −9
Original line number Diff line number Diff line
@@ -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);



	zynq_slcr_init();

	clocksource_of_init();

}

arch/arm/mach-zynq/common.h

+3 −0
Original line number Diff line number Diff line
@@ -17,6 +17,9 @@ 
#ifndef __MACH_ZYNQ_COMMON_H__

#define __MACH_ZYNQ_COMMON_H__



extern int zynq_slcr_init(void);



extern void __iomem *zynq_slcr_base;

extern void __iomem *zynq_scu_base;



#endif

arch/arm/mach-zynq/slcr.c

0 → 100644
+69 −0
Original line number Diff line number Diff line 
/*

 * 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 <linux/export.h>

#include <linux/io.h>

#include <linux/fs.h>

#include <linux/interrupt.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of_address.h>

#include <linux/uaccess.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

#include <linux/string.h>

#include <linux/clk/zynq.h>

#include "common.h"



#define SLCR_UNLOCK_MAGIC		0xDF0D

#define SLCR_UNLOCK			0x8   /* SCLR unlock register */



void __iomem *zynq_slcr_base;



/**

 * zynq_slcr_init

 * Returns 0 on success, negative errno otherwise.

 *

 * Called early during boot from platform code to remap SLCR area.

 */

int __init zynq_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;

}