mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-07-23 05:07:37 -04:00
2423405880
The next changes will bring the module support on the timer drivers. Those use the API exported by the mmio clocksource which are not exporting their symbols. Fix that by adding EXPORT_SYMBOL_GPL(). Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org> Acked-by: John Stultz <jstultz@google.com> Link: https://patch.msgid.link/20260327180600.8150-3-daniel.lezcano@kernel.org
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Generic MMIO clocksource support
|
|
*/
|
|
#include <linux/clocksource.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/slab.h>
|
|
|
|
struct clocksource_mmio {
|
|
void __iomem *reg;
|
|
struct clocksource clksrc;
|
|
};
|
|
|
|
static inline struct clocksource_mmio *to_mmio_clksrc(struct clocksource *c)
|
|
{
|
|
return container_of(c, struct clocksource_mmio, clksrc);
|
|
}
|
|
|
|
u64 clocksource_mmio_readl_up(struct clocksource *c)
|
|
{
|
|
return (u64)readl_relaxed(to_mmio_clksrc(c)->reg);
|
|
}
|
|
EXPORT_SYMBOL_GPL(clocksource_mmio_readl_up);
|
|
|
|
u64 clocksource_mmio_readl_down(struct clocksource *c)
|
|
{
|
|
return ~(u64)readl_relaxed(to_mmio_clksrc(c)->reg) & c->mask;
|
|
}
|
|
EXPORT_SYMBOL_GPL(clocksource_mmio_readl_down);
|
|
|
|
u64 clocksource_mmio_readw_up(struct clocksource *c)
|
|
{
|
|
return (u64)readw_relaxed(to_mmio_clksrc(c)->reg);
|
|
}
|
|
EXPORT_SYMBOL_GPL(clocksource_mmio_readw_up);
|
|
|
|
u64 clocksource_mmio_readw_down(struct clocksource *c)
|
|
{
|
|
return ~(u64)readw_relaxed(to_mmio_clksrc(c)->reg) & c->mask;
|
|
}
|
|
EXPORT_SYMBOL_GPL(clocksource_mmio_readw_down);
|
|
|
|
/**
|
|
* clocksource_mmio_init - Initialize a simple mmio based clocksource
|
|
* @base: Virtual address of the clock readout register
|
|
* @name: Name of the clocksource
|
|
* @hz: Frequency of the clocksource in Hz
|
|
* @rating: Rating of the clocksource
|
|
* @bits: Number of valid bits
|
|
* @read: One of clocksource_mmio_read*() above
|
|
*/
|
|
int clocksource_mmio_init(void __iomem *base, const char *name,
|
|
unsigned long hz, int rating, unsigned bits,
|
|
u64 (*read)(struct clocksource *))
|
|
{
|
|
struct clocksource_mmio *cs;
|
|
|
|
if (bits > 64 || bits < 16)
|
|
return -EINVAL;
|
|
|
|
cs = kzalloc_obj(struct clocksource_mmio);
|
|
if (!cs)
|
|
return -ENOMEM;
|
|
|
|
cs->reg = base;
|
|
cs->clksrc.name = name;
|
|
cs->clksrc.rating = rating;
|
|
cs->clksrc.read = read;
|
|
cs->clksrc.mask = CLOCKSOURCE_MASK(bits);
|
|
cs->clksrc.flags = CLOCK_SOURCE_IS_CONTINUOUS;
|
|
|
|
return clocksource_register_hz(&cs->clksrc, hz);
|
|
}
|
|
EXPORT_SYMBOL_GPL(clocksource_mmio_init);
|