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https://github.com/torvalds/linux.git
synced 2026-09-25 21:21:09 -04:00
Saravana Kannan
7a3768c206
The commit4f41fe386a("clocksource/drivers/timer-probe: Avoid creating dead devices") broke the handling of arm,vexpress-sysreg [1]. The arm,vexpress-sysreg device is handled by both timer-versatile.c and drivers/mfd/vexpress-sysreg.c. While the timer driver doesn't use the device, the mfd driver still needs a device to probe. So, this patch clears the OF_POPULATED flag to continue creating the device. [1] - https://lore.kernel.org/lkml/[email protected]/ Fixes:4f41fe386a("clocksource/drivers/timer-probe: Avoid creating dead devices") Signed-off-by: Saravana Kannan <[email protected]> Signed-off-by: Daniel Lezcano <[email protected]> Link: https://lore.kernel.org/r/[email protected]
41 lines
866 B
C
41 lines
866 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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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.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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of_node_clear_flag(node, OF_POPULATED);
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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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TIMER_OF_DECLARE(vexpress, "arm,vexpress-sysreg",
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versatile_sched_clock_init);
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TIMER_OF_DECLARE(versatile, "arm,versatile-sysreg",
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versatile_sched_clock_init);
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