forked from luck/tmp_suning_uos_patched
f2fa0299d3
The same 24MHz counter is also present on Versatile AB and PB boards, so add the compatible string for them. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> Cc: Liviu Dudau <liviu.dudau@arm.com> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* Copyright (C) 2014 ARM Limited
|
|
*/
|
|
|
|
#include <linux/clocksource.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/sched_clock.h>
|
|
|
|
#define SYS_24MHZ 0x05c
|
|
|
|
static void __iomem *versatile_sys_24mhz;
|
|
|
|
static u64 notrace versatile_sys_24mhz_read(void)
|
|
{
|
|
return readl(versatile_sys_24mhz);
|
|
}
|
|
|
|
static void __init versatile_sched_clock_init(struct device_node *node)
|
|
{
|
|
void __iomem *base = of_iomap(node, 0);
|
|
|
|
if (!base)
|
|
return;
|
|
|
|
versatile_sys_24mhz = base + SYS_24MHZ;
|
|
|
|
sched_clock_register(versatile_sys_24mhz_read, 32, 24000000);
|
|
}
|
|
CLOCKSOURCE_OF_DECLARE(vexpress, "arm,vexpress-sysreg",
|
|
versatile_sched_clock_init);
|
|
CLOCKSOURCE_OF_DECLARE(versatile, "arm,versatile-sysreg",
|
|
versatile_sched_clock_init);
|