1 // SPDX-License-Identifier: GPL-2.0-only
3  * Rockchip timer support
44 	struct rk_timer timer;  member
52 	return &container_of(ce, struct rk_clkevt, ce)->timer;  in rk_timer()
55 static inline void rk_timer_disable(struct rk_timer *timer)  in rk_timer_disable()  argument
57 	writel_relaxed(TIMER_DISABLE, timer->ctrl);  in rk_timer_disable()
60 static inline void rk_timer_enable(struct rk_timer *timer, u32 flags)  in rk_timer_enable()  argument
62 	writel_relaxed(TIMER_ENABLE | flags, timer->ctrl);  in rk_timer_enable()
66 				    struct rk_timer *timer)  in rk_timer_update_counter()  argument
68 	writel_relaxed(cycles, timer->base + TIMER_LOAD_COUNT0);  in rk_timer_update_counter()
69 	writel_relaxed(0, timer->base + TIMER_LOAD_COUNT1);  in rk_timer_update_counter()
72 static void rk_timer_interrupt_clear(struct rk_timer *timer)  in rk_timer_interrupt_clear()  argument
74 	writel_relaxed(1, timer->base + TIMER_INT_STATUS);  in rk_timer_interrupt_clear()
80 	struct rk_timer *timer = rk_timer(ce);  in rk_timer_set_next_event()  local
82 	rk_timer_disable(timer);  in rk_timer_set_next_event()
83 	rk_timer_update_counter(cycles, timer);  in rk_timer_set_next_event()
84 	rk_timer_enable(timer, TIMER_MODE_USER_DEFINED_COUNT |  in rk_timer_set_next_event()
91 	struct rk_timer *timer = rk_timer(ce);  in rk_timer_shutdown()  local
93 	rk_timer_disable(timer);  in rk_timer_shutdown()
99 	struct rk_timer *timer = rk_timer(ce);  in rk_timer_set_periodic()  local
101 	rk_timer_disable(timer);  in rk_timer_set_periodic()
102 	rk_timer_update_counter(timer->freq / HZ - 1, timer);  in rk_timer_set_periodic()
103 	rk_timer_enable(timer, TIMER_MODE_FREE_RUNNING | TIMER_INT_UNMASK);  in rk_timer_set_periodic()
110 	struct rk_timer *timer = rk_timer(ce);  in rk_timer_interrupt()  local
112 	rk_timer_interrupt_clear(timer);  in rk_timer_interrupt()
115 		rk_timer_disable(timer);  in rk_timer_interrupt()
117 	ce->event_handler(ce);  in rk_timer_interrupt()
124 	return ~readl_relaxed(rk_clksrc->base + TIMER_CURRENT_VALUE0);  in rk_timer_sched_read()
128 rk_timer_probe(struct rk_timer *timer, struct device_node *np)  in rk_timer_probe()  argument
132 	int ret = -EINVAL, irq;  in rk_timer_probe()
135 	timer->base = of_iomap(np, 0);  in rk_timer_probe()
136 	if (!timer->base) {  in rk_timer_probe()
138 		return -ENXIO;  in rk_timer_probe()
141 	if (of_device_is_compatible(np, "rockchip,rk3399-timer"))  in rk_timer_probe()
144 	timer->ctrl = timer->base + ctrl_reg;  in rk_timer_probe()
158 	timer->pclk = pclk;  in rk_timer_probe()
160 	timer_clk = of_clk_get_by_name(np, "timer");  in rk_timer_probe()
163 		pr_err("Failed to get timer clock for '%s'\n", TIMER_NAME);  in rk_timer_probe()
169 		pr_err("Failed to enable timer clock\n");  in rk_timer_probe()
172 	timer->clk = timer_clk;  in rk_timer_probe()
174 	timer->freq = clk_get_rate(timer_clk);  in rk_timer_probe()
178 		ret = -EINVAL;  in rk_timer_probe()
182 	timer->irq = irq;  in rk_timer_probe()
184 	rk_timer_interrupt_clear(timer);  in rk_timer_probe()
185 	rk_timer_disable(timer);  in rk_timer_probe()
193 	iounmap(timer->base);  in rk_timer_probe()
198 static void __init rk_timer_cleanup(struct rk_timer *timer)  in rk_timer_cleanup()  argument
200 	clk_disable_unprepare(timer->clk);  in rk_timer_cleanup()
201 	clk_disable_unprepare(timer->pclk);  in rk_timer_cleanup()
202 	iounmap(timer->base);  in rk_timer_cleanup()
208 	int ret = -EINVAL;  in rk_clkevt_init()
212 		ret = -ENOMEM;  in rk_clkevt_init()
216 	ret = rk_timer_probe(&rk_clkevt->timer, np);  in rk_clkevt_init()
220 	ce = &rk_clkevt->ce;  in rk_clkevt_init()
221 	ce->name = TIMER_NAME;  in rk_clkevt_init()
222 	ce->features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT |  in rk_clkevt_init()
224 	ce->set_next_event = rk_timer_set_next_event;  in rk_clkevt_init()
225 	ce->set_state_shutdown = rk_timer_shutdown;  in rk_clkevt_init()
226 	ce->set_state_periodic = rk_timer_set_periodic;  in rk_clkevt_init()
227 	ce->irq = rk_clkevt->timer.irq;  in rk_clkevt_init()
228 	ce->cpumask = cpu_possible_mask;  in rk_clkevt_init()
229 	ce->rating = 250;  in rk_clkevt_init()
231 	ret = request_irq(rk_clkevt->timer.irq, rk_timer_interrupt, IRQF_TIMER,  in rk_clkevt_init()
239 	clockevents_config_and_register(&rk_clkevt->ce,  in rk_clkevt_init()
240 					rk_clkevt->timer.freq, 1, UINT_MAX);  in rk_clkevt_init()
244 	rk_timer_cleanup(&rk_clkevt->timer);  in rk_clkevt_init()
255 	int ret = -EINVAL;  in rk_clksrc_init()
259 		ret = -ENOMEM;  in rk_clksrc_init()
270 	ret = clocksource_mmio_init(rk_clksrc->base + TIMER_CURRENT_VALUE0,  in rk_clksrc_init()
271 		TIMER_NAME, rk_clksrc->freq, 250, 32,  in rk_clksrc_init()
278 	sched_clock_register(rk_timer_sched_read, 32, rk_clksrc->freq);  in rk_clksrc_init()
299 	pr_err("Too many timer definitions for '%s'\n", TIMER_NAME);  in rk_timer_init()
300 	return -EINVAL;  in rk_timer_init()
303 TIMER_OF_DECLARE(rk3288_timer, "rockchip,rk3288-timer", rk_timer_init);
304 TIMER_OF_DECLARE(rk3399_timer, "rockchip,rk3399-timer", rk_timer_init);