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86de962823
The init functions do not return any error. They behave as the following:
- panic, thus leading to a kernel crash while another timer may work and
make the system boot up correctly
or
- print an error and let the caller unaware if the state of the system
Change that by converting the init functions to return an error conforming
to the CLOCKSOURCE_OF_RET prototype.
Proper error handling (rollback, errno value) will be changed later case
by case, thus this change just return back an error or success in the init
function.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
45 lines
1.2 KiB
C
45 lines
1.2 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Copyright (C) 2014 ARM Limited
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*/
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#include <linux/clocksource.h>
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#include <linux/io.h>
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#include <linux/of_address.h>
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#include <linux/sched_clock.h>
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#define SYS_24MHZ 0x05c
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static void __iomem *versatile_sys_24mhz;
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static u64 notrace versatile_sys_24mhz_read(void)
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{
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return readl(versatile_sys_24mhz);
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}
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static int __init versatile_sched_clock_init(struct device_node *node)
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{
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void __iomem *base = of_iomap(node, 0);
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if (!base)
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return -ENXIO;
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versatile_sys_24mhz = base + SYS_24MHZ;
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sched_clock_register(versatile_sys_24mhz_read, 32, 24000000);
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return 0;
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}
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CLOCKSOURCE_OF_DECLARE_RET(vexpress, "arm,vexpress-sysreg",
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versatile_sched_clock_init);
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CLOCKSOURCE_OF_DECLARE_RET(versatile, "arm,versatile-sysreg",
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versatile_sched_clock_init);
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