arm/mach-mmp/time.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * linux/arch/arm/mach-mmp/time.c
10  *   2008-04-11: Jason Chagas <Jason.chagas@marvell.com>
11  *   2008-10-08: Bin Yang <bin.yang@marvell.com>
13  * The timers module actually includes three timers, each timer with up to
14  * three match comparators. Timer #0 is used here in free-running mode as
32 #include "regs-timers.h"
33 #include <linux/soc/mmp/cputype.h>
41  * Read the timer through the CVWR register. Delay is required after requesting
52 	while (delay--)  in timer_read()
73 	 * Disable timer 0.  in timer_interrupt()
77 	c->event_handler(c);  in timer_interrupt()
90 	 * Disable timer 0.  in timer_set_next_event()
95 	 * Clear and enable timer match 0 interrupt.  in timer_set_next_event()
101 	 * Setup new clockevent timer value.  in timer_set_next_event()
103 	__raw_writel(delta - 1, mmp_timer_base + TMR_TN_MM(0, 0));  in timer_set_next_event()
106 	 * Enable timer 0.  in timer_set_next_event()
160 	/* set timer 0 to periodic mode, and timer 1 to free-running mode */  in timer_config()
167 	__raw_writel(0x0, mmp_timer_base + TMR_PLCR(1)); /* free-running */  in timer_config()
171 	/* enable timer 1 counter */  in timer_config()
184 			"timer", &ckevt))  in mmp_timer_init()
185 		pr_err("Failed to request irq %d (timer)\n", irq);  in mmp_timer_init()
211 		return -EINVAL;  in mmp_dt_init_timer()
215 		return -ENOMEM;  in mmp_dt_init_timer()
221 TIMER_OF_DECLARE(mmp_timer, "mrvl,mmp-timer", mmp_dt_init_timer);