void __iomem *mtu_base; /* Assigned by machine code */
-/*
- * Kernel assumes that sched_clock can be called early
- * but the MTU may not yet be initialized.
- */
-static cycle_t nmdk_read_timer_dummy(struct clocksource *cs)
-{
- return 0;
-}
-
-/* clocksource: MTU decrements, so we negate the value being read. */
-static cycle_t nmdk_read_timer(struct clocksource *cs)
-{
- return -readl(mtu_base + MTU_VAL(0));
-}
-
-static struct clocksource nmdk_clksrc = {
- .name = "mtu_0",
- .rating = 200,
- .read = nmdk_read_timer_dummy,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
/*
* Override the global weak sched_clock symbol with this
* local implementation which uses the clocksource to get some
writel(0, mtu_base + MTU_BGLR(0));
writel(cr | MTU_CRn_ENA, mtu_base + MTU_CR(0));
- /* Now the clock source is ready */
- nmdk_clksrc.read = nmdk_read_timer;
-
- if (clocksource_register_hz(&nmdk_clksrc, rate))
+ if (clocksource_mmio_init(mtu_base + MTU_VAL(0), "mtu_0",
+ rate, 200, 32, clocksource_mmio_readl_down))
pr_err("timer: failed to initialize clock source %s\n",
- nmdk_clksrc.name);
+ "mtu_0");
init_sched_clock(&cd, nomadik_update_sched_clock, 32, rate);