[net-next-2.6.git] / arch / arm / mach-omap2 / clkt2xxx_osc.c

/*
 * OMAP2xxx osc_clk-specific clock code
 *
 * Copyright (C) 2005-2008 Texas Instruments, Inc.
 * Copyright (C) 2004-2010 Nokia Corporation
 *
 * Contacts:
 * Richard Woodruff <r-woodruff2@ti.com>
 * Paul Walmsley
 *
 * Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
 * Gordon McNutt and RidgeRun, Inc.
 *
 * 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.
 */
#undef DEBUG

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/clk.h>
#include <linux/io.h>

#include <plat/clock.h>

#include "clock.h"
#include "clock2xxx.h"
#include "prm.h"
#include "prm-regbits-24xx.h"

static int omap2_enable_osc_ck(struct clk *clk)
{
	u32 pcc;

	pcc = __raw_readl(prcm_clksrc_ctrl);

	__raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);

	return 0;
}

static void omap2_disable_osc_ck(struct clk *clk)
{
	u32 pcc;

	pcc = __raw_readl(prcm_clksrc_ctrl);

	__raw_writel(pcc | OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);
}

const struct clkops clkops_oscck = {
	.enable		= omap2_enable_osc_ck,
	.disable	= omap2_disable_osc_ck,
};

unsigned long omap2_osc_clk_recalc(struct clk *clk)
{
	return omap2xxx_get_apll_clkin() * omap2xxx_get_sysclkdiv();
}
Commit	Line	Data
87a1b26c PW	1	/*
	2	* OMAP2xxx osc_clk-specific clock code
	3	*
	4	* Copyright (C) 2005-2008 Texas Instruments, Inc.
	5	* Copyright (C) 2004-2010 Nokia Corporation
	6	*
	7	* Contacts:
	8	* Richard Woodruff <r-woodruff2@ti.com>
	9	* Paul Walmsley
	10	*
	11	* Based on earlier work by Tuukka Tikkanen, Tony Lindgren,
	12	* Gordon McNutt and RidgeRun, Inc.
	13	*
	14	* This program is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License version 2 as
	16	* published by the Free Software Foundation.
	17	*/
	18	#undef DEBUG
	19
	20	#include <linux/module.h>
	21	#include <linux/kernel.h>
	22	#include <linux/errno.h>
	23	#include <linux/clk.h>
	24	#include <linux/io.h>
	25
	26	#include <plat/clock.h>
	27
	28	#include "clock.h"
	29	#include "clock2xxx.h"
	30	#include "prm.h"
	31	#include "prm-regbits-24xx.h"
	32
	33	static int omap2_enable_osc_ck(struct clk *clk)
	34	{
	35	u32 pcc;
	36
	37	pcc = __raw_readl(prcm_clksrc_ctrl);
	38
	39	__raw_writel(pcc & ~OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);
	40
	41	return 0;
	42	}
	43
	44	static void omap2_disable_osc_ck(struct clk *clk)
	45	{
	46	u32 pcc;
	47
	48	pcc = __raw_readl(prcm_clksrc_ctrl);
	49
	50	__raw_writel(pcc \| OMAP_AUTOEXTCLKMODE_MASK, prcm_clksrc_ctrl);
	51	}
	52
	53	const struct clkops clkops_oscck = {
	54	.enable = omap2_enable_osc_ck,
	55	.disable = omap2_disable_osc_ck,
	56	};
	57
	58	unsigned long omap2_osc_clk_recalc(struct clk *clk)
	59	{
	60	return omap2xxx_get_apll_clkin() * omap2xxx_get_sysclkdiv();
	61	}
	62