drivers/clocksource/nomadik-mtu.c

1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2010 Linus Walleij for ST-Ericsson
25  * registers. These are register names.
33 /* per-timer registers take 0..3 as argument */
36 #define MTU_CR(x)	(0x10 + 0x10 * (x) + 0x08)	/* Control reg */
41 #define MTU_CRn_PERIODIC	0x40	/* if 0 = free-running */
66 static u32 nmdk_cycle;		/* write-once */
79 	return -readl(mtu_base + MTU_VAL(0));  in nomadik_read_sched_clock()
87 /* Clockevent device: use one-shot mode */
103 		/* Timer: configure load and background-load, and fire it up */  in nmdk_clkevt_reset()
145 	/* ClockSource: configure load and background-load, and fire it up */  in nmdk_clksrc_reset()
179 	writel(1 << 1, mtu_base + MTU_ICR); /* Interrupt clear reg */  in nmdk_timer_interrupt()
180 	evdev->event_handler(evdev);  in nmdk_timer_interrupt()
200 	 * Use a divide-by-16 counter if the tick rate is more than 32MHz.  in nmdk_timer_init()
202 	 * to wake-up at a max 127s a head in time. Dividing a 2.4 MHz timer  in nmdk_timer_init()
259 		return -ENXIO;  in nmdk_timer_of_init()
277 		return -EINVAL;  in nmdk_timer_of_init()
282 TIMER_OF_DECLARE(nomadik_mtu, "st,nomadik-mtu",