[mirror_ubuntu-bionic-kernel.git] / arch / arm / mach-omap2 / clkt2xxx_dpll.c

/*
 * OMAP2-specific DPLL control functions
 *
 * Copyright (C) 2011 Nokia Corporation
 * Paul Walmsley
 *
 * 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/errno.h>
#include <linux/clk.h>
#include <linux/io.h>

#include "clock.h"
#include "cm2xxx.h"
#include "cm-regbits-24xx.h"

/* Private functions */

/**
 * _allow_idle - enable DPLL autoidle bits
 * @clk: struct clk * of the DPLL to operate on
 *
 * Enable DPLL automatic idle control.  The DPLL will enter low-power
 * stop when its downstream clocks are gated.  No return value.
 * REVISIT: DPLL can optionally enter low-power bypass by writing 0x1
 * instead.  Add some mechanism to optionally enter this mode.
 */
static void _allow_idle(struct clk_hw_omap *clk)
{
	if (!clk || !clk->dpll_data)
		return;

	omap2xxx_cm_set_dpll_auto_low_power_stop();
}

/**
 * _deny_idle - prevent DPLL from automatically idling
 * @clk: struct clk * of the DPLL to operate on
 *
 * Disable DPLL automatic idle control.  No return value.
 */
static void _deny_idle(struct clk_hw_omap *clk)
{
	if (!clk || !clk->dpll_data)
		return;

	omap2xxx_cm_set_dpll_disable_autoidle();
}


/* Public data */
const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll = {
	.allow_idle	= _allow_idle,
	.deny_idle	= _deny_idle,
};
Commit	Line	Data
0fd0c21b PW	1	/*
	2	* OMAP2-specific DPLL control functions
	3	*
	4	* Copyright (C) 2011 Nokia Corporation
	5	* Paul Walmsley
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/errno.h>
	14	#include <linux/clk.h>
	15	#include <linux/io.h>
	16
0fd0c21b	17	#include "clock.h"
ff4ae5d9	18	#include "cm2xxx.h"
0fd0c21b PW	19	#include "cm-regbits-24xx.h"
	20
	21	/* Private functions */
	22
	23	/**
	24	* _allow_idle - enable DPLL autoidle bits
	25	* @clk: struct clk * of the DPLL to operate on
	26	*
	27	* Enable DPLL automatic idle control. The DPLL will enter low-power
	28	* stop when its downstream clocks are gated. No return value.
	29	* REVISIT: DPLL can optionally enter low-power bypass by writing 0x1
	30	* instead. Add some mechanism to optionally enter this mode.
	31	*/
ed1ebc49	32	static void _allow_idle(struct clk_hw_omap *clk)
0fd0c21b PW	33	{
	34	if (!clk \|\| !clk->dpll_data)
	35	return;
	36
	37	omap2xxx_cm_set_dpll_auto_low_power_stop();
	38	}
	39
	40	/**
	41	* _deny_idle - prevent DPLL from automatically idling
	42	* @clk: struct clk * of the DPLL to operate on
	43	*
	44	* Disable DPLL automatic idle control. No return value.
	45	*/
ed1ebc49	46	static void _deny_idle(struct clk_hw_omap *clk)
0fd0c21b PW	47	{
	48	if (!clk \|\| !clk->dpll_data)
	49	return;
	50
	51	omap2xxx_cm_set_dpll_disable_autoidle();
	52	}
	53
	54
	55	/* Public data */
ed1ebc49 RN	56	const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll = {
	57	.allow_idle = _allow_idle,
	58	.deny_idle = _deny_idle,
	59	};