1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * OMAP2-specific DPLL control functions
 4 *
 5 * Copyright (C) 2011 Nokia Corporation
 6 * Paul Walmsley
 
 
 
 
 7 */
 8
 9#include <linux/kernel.h>
10#include <linux/errno.h>
11#include <linux/clk.h>
12#include <linux/io.h>
13
14#include "clock.h"
15#include "cm2xxx.h"
16#include "cm-regbits-24xx.h"
17
18/* Private functions */
19
20/**
21 * _allow_idle - enable DPLL autoidle bits
22 * @clk: struct clk * of the DPLL to operate on
23 *
24 * Enable DPLL automatic idle control.  The DPLL will enter low-power
25 * stop when its downstream clocks are gated.  No return value.
26 * REVISIT: DPLL can optionally enter low-power bypass by writing 0x1
27 * instead.  Add some mechanism to optionally enter this mode.
28 */
29static void _allow_idle(struct clk_hw_omap *clk)
30{
31	if (!clk || !clk->dpll_data)
32		return;
33
34	omap2xxx_cm_set_dpll_auto_low_power_stop();
35}
36
37/**
38 * _deny_idle - prevent DPLL from automatically idling
39 * @clk: struct clk * of the DPLL to operate on
40 *
41 * Disable DPLL automatic idle control.  No return value.
42 */
43static void _deny_idle(struct clk_hw_omap *clk)
44{
45	if (!clk || !clk->dpll_data)
46		return;
47
48	omap2xxx_cm_set_dpll_disable_autoidle();
49}
50
51
52/* Public data */
53const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll = {
54	.allow_idle	= _allow_idle,
55	.deny_idle	= _deny_idle,
56};

 
 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
17#include "clock.h"
18#include "cm2xxx.h"
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 */
32static void _allow_idle(struct clk_hw_omap *clk)
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 */
46static void _deny_idle(struct clk_hw_omap *clk)
47{
48	if (!clk || !clk->dpll_data)
49		return;
50
51	omap2xxx_cm_set_dpll_disable_autoidle();
52}
53
54
55/* Public data */
56const struct clk_hw_omap_ops clkhwops_omap2xxx_dpll = {
57	.allow_idle	= _allow_idle,
58	.deny_idle	= _deny_idle,
59};