1 // SPDX-License-Identifier: GPL-2.0-only
15 #include "timer-of.h"
27  * The Otto platform provides multiple 28 bit timers/counters with the following
28  * operating logic. If enabled the timer counts up. Per timer one can set a
29  * maximum counter value as an end marker. If end marker is reached the timer
30  * fires an interrupt. If the timer "overflows" by reaching the end marker or
32  * the timer is in operating mode COUNTER it stops. In mode TIMER it will
100 	pr_debug("------------- %d %p\n",	\
108 	rttm_ack_irq(to->of_base.base);  in rttm_timer_interrupt()
109 	RTTM_DEBUG(to->of_base.base);  in rttm_timer_interrupt()
110 	clkevt->event_handler(clkevt);  in rttm_timer_interrupt()
123 	rttm_set_counter(to->of_base.base, 0);  in rttm_start_timer()
124 	rttm_enable_timer(to->of_base.base, mode, to->of_clk.rate / RTTM_TICKS_PER_SEC);  in rttm_start_timer()
131 	RTTM_DEBUG(to->of_base.base);  in rttm_next_event()
132 	rttm_stop_timer(to->of_base.base);  in rttm_next_event()
133 	rttm_set_period(to->of_base.base, delta);  in rttm_next_event()
143 	RTTM_DEBUG(to->of_base.base);  in rttm_state_oneshot()
144 	rttm_stop_timer(to->of_base.base);  in rttm_state_oneshot()
145 	rttm_set_period(to->of_base.base, RTTM_TICKS_PER_SEC / HZ);  in rttm_state_oneshot()
155 	RTTM_DEBUG(to->of_base.base);  in rttm_state_periodic()
156 	rttm_stop_timer(to->of_base.base);  in rttm_state_periodic()
157 	rttm_set_period(to->of_base.base, RTTM_TICKS_PER_SEC / HZ);  in rttm_state_periodic()
167 	RTTM_DEBUG(to->of_base.base);  in rttm_state_shutdown()
168 	rttm_stop_timer(to->of_base.base);  in rttm_state_shutdown()
184 	return rttm_get_counter(rcs->to.of_base.base);  in rttm_read_clocksource()
208 	rttm_disable_irq(rcs->to.of_base.base);  in rttm_enable_clocksource()
209 	rttm_setup_timer(rcs->to.of_base.base);  in rttm_enable_clocksource()
210 	rttm_enable_timer(rcs->to.of_base.base, RTTM_CTRL_TIMER,  in rttm_enable_clocksource()
211 			  rcs->to.of_clk.rate / RTTM_TICKS_PER_SEC);  in rttm_enable_clocksource()
238 	RTTM_DEBUG(to->of_base.base);  in rttm_cpu_starting()
239 	to->clkevt.cpumask = cpumask_of(cpu);  in rttm_cpu_starting()
240 	irq_force_affinity(to->of_irq.irq, to->clkevt.cpumask);  in rttm_cpu_starting()
241 	clockevents_config_and_register(&to->clkevt, RTTM_TICKS_PER_SEC,  in rttm_cpu_starting()
243 	rttm_enable_irq(to->of_base.base);  in rttm_cpu_starting()
257 		to->of_irq.index = to->of_base.index = cpu;  in rttm_probe()
259 			pr_err("setup of timer %d failed\n", cpu);  in rttm_probe()
262 		rttm_setup_timer(to->of_base.base);  in rttm_probe()
265 	/* Activate the n'th + 1 timer as a stable CPU clocksource. */  in rttm_probe()
267 	to->of_base.index = clkidx;  in rttm_probe()
274 		pr_err(" setup of timer %d as clocksource failed", clkidx);  in rttm_probe()
277 				"timer/realtek:online",  in rttm_probe()
280 	pr_err("timer registration failed\n");  in rttm_probe()
288 	return -EINVAL;  in rttm_probe()
291 TIMER_OF_DECLARE(otto_timer, "realtek,otto-timer", rttm_probe);