// 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; }