Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
42 lines
853 B
C
42 lines
853 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* SH-Mobile Timer
|
|
*
|
|
* Copyright (C) 2010 Magnus Damm
|
|
* Copyright (C) 2002 - 2009 Paul Mundt
|
|
*/
|
|
#include <linux/platform_device.h>
|
|
#include <linux/clocksource.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include "common.h"
|
|
|
|
void __init shmobile_init_delay(void)
|
|
{
|
|
struct device_node *np;
|
|
u32 max_freq = 0;
|
|
|
|
for_each_of_cpu_node(np) {
|
|
u32 freq;
|
|
|
|
if (!of_property_read_u32(np, "clock-frequency", &freq))
|
|
max_freq = max(max_freq, freq);
|
|
}
|
|
|
|
if (!max_freq)
|
|
return;
|
|
|
|
/*
|
|
* Calculate a worst-case loops-per-jiffy value
|
|
* based on maximum cpu core hz setting and the
|
|
* __delay() implementation in arch/arm/lib/delay.S.
|
|
*
|
|
* This will result in a longer delay than expected
|
|
* when the cpu core runs on lower frequencies.
|
|
*/
|
|
|
|
if (!preset_lpj)
|
|
preset_lpj = max_freq / HZ;
|
|
}
|