diff options
Diffstat (limited to 'drivers/clocksource/mmio.c')
| -rw-r--r-- | drivers/clocksource/mmio.c | 25 |
1 files changed, 11 insertions, 14 deletions
diff --git a/drivers/clocksource/mmio.c b/drivers/clocksource/mmio.c index c0e25125a55e..9de751531831 100644 --- a/drivers/clocksource/mmio.c +++ b/drivers/clocksource/mmio.c @@ -1,9 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Generic MMIO clocksource support - * - * 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. */ #include <linux/clocksource.h> #include <linux/errno.h> @@ -20,24 +17,24 @@ static inline struct clocksource_mmio *to_mmio_clksrc(struct clocksource *c) return container_of(c, struct clocksource_mmio, clksrc); } -cycle_t clocksource_mmio_readl_up(struct clocksource *c) +u64 clocksource_mmio_readl_up(struct clocksource *c) { - return readl_relaxed(to_mmio_clksrc(c)->reg); + return (u64)readl_relaxed(to_mmio_clksrc(c)->reg); } -cycle_t clocksource_mmio_readl_down(struct clocksource *c) +u64 clocksource_mmio_readl_down(struct clocksource *c) { - return ~readl_relaxed(to_mmio_clksrc(c)->reg); + return ~(u64)readl_relaxed(to_mmio_clksrc(c)->reg) & c->mask; } -cycle_t clocksource_mmio_readw_up(struct clocksource *c) +u64 clocksource_mmio_readw_up(struct clocksource *c) { - return readw_relaxed(to_mmio_clksrc(c)->reg); + return (u64)readw_relaxed(to_mmio_clksrc(c)->reg); } -cycle_t clocksource_mmio_readw_down(struct clocksource *c) +u64 clocksource_mmio_readw_down(struct clocksource *c) { - return ~(unsigned)readw_relaxed(to_mmio_clksrc(c)->reg); + return ~(u64)readw_relaxed(to_mmio_clksrc(c)->reg) & c->mask; } /** @@ -51,11 +48,11 @@ cycle_t clocksource_mmio_readw_down(struct clocksource *c) */ int __init clocksource_mmio_init(void __iomem *base, const char *name, unsigned long hz, int rating, unsigned bits, - cycle_t (*read)(struct clocksource *)) + u64 (*read)(struct clocksource *)) { struct clocksource_mmio *cs; - if (bits > 32 || bits < 16) + if (bits > 64 || bits < 16) return -EINVAL; cs = kzalloc(sizeof(struct clocksource_mmio), GFP_KERNEL); |