drivers/clocksource/timer-zevio.c

3  *  linux/drivers/clocksource/zevio-timer.c
64 	struct zevio_timer *timer = container_of(dev, struct zevio_timer,
67 	writel(delta, timer->timer1 + IO_CURRENT_VAL);
69 			timer->timer1 + IO_CONTROL);
76 	struct zevio_timer *timer = container_of(dev, struct zevio_timer,
79 	/* Disable timer interrupts */
80 	writel(0, timer->interrupt_regs + IO_INTR_MSK);
81 	writel(TIMER_INTR_ALL, timer->interrupt_regs + IO_INTR_ACK);
82 	/* Stop timer */
83 	writel(CNTL_STOP_TIMER, timer->timer1 + IO_CONTROL);
89 	struct zevio_timer *timer = container_of(dev, struct zevio_timer,
92 	/* Enable timer interrupts */
93 	writel(TIMER_INTR_MSK, timer->interrupt_regs + IO_INTR_MSK);
94 	writel(TIMER_INTR_ALL, timer->interrupt_regs + IO_INTR_ACK);
100 	struct zevio_timer *timer = dev_id;
103 	intr = readl(timer->interrupt_regs + IO_INTR_ACK);
107 	writel(TIMER_INTR_MSK, timer->interrupt_regs + IO_INTR_ACK);
108 	writel(CNTL_STOP_TIMER, timer->timer1 + IO_CONTROL);
110 	if (timer->clkevt.event_handler)
111 		timer->clkevt.event_handler(&timer->clkevt);
118 	struct zevio_timer *timer;
122 	timer = kzalloc(sizeof(*timer), GFP_KERNEL);
123 	if (!timer)
126 	timer->base = of_iomap(node, 0);
127 	if (!timer->base) {
131 	timer->timer1 = timer->base + IO_TIMER1;
132 	timer->timer2 = timer->base + IO_TIMER2;
134 	timer->clk = of_clk_get(node, 0);
135 	if (IS_ERR(timer->clk)) {
136 		ret = PTR_ERR(timer->clk);
141 	timer->interrupt_regs = of_iomap(node, 1);
145 	scnprintf(timer->clocksource_name, sizeof(timer->clocksource_name),
149 	scnprintf(timer->clockevent_name, sizeof(timer->clockevent_name),
153 	if (timer->interrupt_regs && irqnr) {
154 		timer->clkevt.name		= timer->clockevent_name;
155 		timer->clkevt.set_next_event	= zevio_timer_set_event;
156 		timer->clkevt.set_state_shutdown = zevio_timer_shutdown;
157 		timer->clkevt.set_state_oneshot = zevio_timer_set_oneshot;
158 		timer->clkevt.tick_resume	= zevio_timer_set_oneshot;
159 		timer->clkevt.rating		= 200;
160 		timer->clkevt.cpumask		= cpu_possible_mask;
161 		timer->clkevt.features		= CLOCK_EVT_FEAT_ONESHOT;
162 		timer->clkevt.irq		= irqnr;
164 		writel(CNTL_STOP_TIMER, timer->timer1 + IO_CONTROL);
165 		writel(0, timer->timer1 + IO_DIVIDER);
167 		/* Start with timer interrupts disabled */
168 		writel(0, timer->interrupt_regs + IO_INTR_MSK);
169 		writel(TIMER_INTR_ALL, timer->interrupt_regs + IO_INTR_ACK);
171 		/* Interrupt to occur when timer value matches 0 */
172 		writel(0, timer->base + IO_MATCH(TIMER_MATCH));
176 				timer->clockevent_name, timer)) {
178 			       timer->clockevent_name);
181 		clockevents_config_and_register(&timer->clkevt,
182 				clk_get_rate(timer->clk), 0x0001, 0xffff);
183 		pr_info("Added %s as clockevent\n", timer->clockevent_name);
186 	writel(CNTL_STOP_TIMER, timer->timer2 + IO_CONTROL);
187 	writel(0, timer->timer2 + IO_CURRENT_VAL);
188 	writel(0, timer->timer2 + IO_DIVIDER);
190 			timer->timer2 + IO_CONTROL);
192 	clocksource_mmio_init(timer->timer2 + IO_CURRENT_VAL,
193 			timer->clocksource_name,
194 			clk_get_rate(timer->clk),
198 	pr_info("Added %s as clocksource\n", timer->clocksource_name);
202 	iounmap(timer->base);
204 	kfree(timer);
213 TIMER_OF_DECLARE(zevio_timer, "lsi,zevio-timer", zevio_timer_init);