1 // SPDX-License-Identifier: GPL-2.0
11 #include <linux/clk.h>
27 	struct clocksource cs;  member
42 	o1 = ioread8(p->mapcommon + TISRC) & p->ovf;  in timer16_get_counter()
47 		v1 = ioread16be(p->mapbase + TCNT);  in timer16_get_counter()
48 		v2 = ioread16be(p->mapbase + TCNT);  in timer16_get_counter()
49 		v3 = ioread16be(p->mapbase + TCNT);  in timer16_get_counter()
50 		o1 = ioread8(p->mapcommon + TISRC) & p->ovf;  in timer16_get_counter()
65 	bclr(p->ovf, p->mapcommon + TISRC);  in timer16_interrupt()
66 	p->total_cycles += 0x10000;  in timer16_interrupt()
71 static inline struct timer16_priv *cs_to_priv(struct clocksource *cs)  in cs_to_priv()  argument
73 	return container_of(cs, struct timer16_priv, cs);  in cs_to_priv()
76 static u64 timer16_clocksource_read(struct clocksource *cs)  in timer16_clocksource_read()  argument
78 	struct timer16_priv *p = cs_to_priv(cs);  in timer16_clocksource_read()
81 	value = p->total_cycles;  in timer16_clocksource_read()
87 static int timer16_enable(struct clocksource *cs)  in timer16_enable()  argument
89 	struct timer16_priv *p = cs_to_priv(cs);  in timer16_enable()
91 	WARN_ON(p->cs_enabled);  in timer16_enable()
93 	p->total_cycles = 0;  in timer16_enable()
94 	iowrite16be(0x0000, p->mapbase + TCNT);  in timer16_enable()
95 	iowrite8(0x83, p->mapbase + TCR);  in timer16_enable()
96 	bset(p->ovie, p->mapcommon + TISRC);  in timer16_enable()
97 	bset(p->enb, p->mapcommon + TSTR);  in timer16_enable()
99 	p->cs_enabled = true;  in timer16_enable()
103 static void timer16_disable(struct clocksource *cs)  in timer16_disable()  argument
105 	struct timer16_priv *p = cs_to_priv(cs);  in timer16_disable()
107 	WARN_ON(!p->cs_enabled);  in timer16_disable()
109 	bclr(p->ovie, p->mapcommon + TISRC);  in timer16_disable()
110 	bclr(p->enb, p->mapcommon + TSTR);  in timer16_disable()
112 	p->cs_enabled = false;  in timer16_disable()
116 	.cs = {
135 	struct clk *clk;  in h8300_16timer_init()  local
137 	clk = of_clk_get(node, 0);  in h8300_16timer_init()
138 	if (IS_ERR(clk)) {  in h8300_16timer_init()
139 		pr_err("failed to get clock for clocksource\n");  in h8300_16timer_init()
140 		return PTR_ERR(clk);  in h8300_16timer_init()
143 	ret = -ENXIO;  in h8300_16timer_init()
146 		pr_err("failed to map registers for clocksource\n");  in h8300_16timer_init()
152 		pr_err("failed to map registers for clocksource\n");  in h8300_16timer_init()
156 	ret = -EINVAL;  in h8300_16timer_init()
159 		pr_err("failed to get irq for clockevent\n");  in h8300_16timer_init()
172 			  IRQF_TIMER, timer16_priv.cs.name, &timer16_priv);  in h8300_16timer_init()
174 		pr_err("failed to request irq %d of clocksource\n", irq);  in h8300_16timer_init()
178 	clocksource_register_hz(&timer16_priv.cs,  in h8300_16timer_init()
179 				clk_get_rate(clk) / 8);  in h8300_16timer_init()
187 	clk_put(clk);  in h8300_16timer_init()
191 TIMER_OF_DECLARE(h8300_16bit, "renesas,16bit-timer",