Lines Matching refs:rt
37 static inline void rt_timer_w32(struct rt_timer *rt, u8 reg, u32 val)
39 __raw_writel(val, rt->membase + reg);
42 static inline u32 rt_timer_r32(struct rt_timer *rt, u8 reg)
44 return __raw_readl(rt->membase + reg);
49 struct rt_timer *rt = (struct rt_timer *) _rt;
51 rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div);
52 rt_timer_w32(rt, TIMER_REG_TMRSTAT, TMRSTAT_TMR0INT);
58 static int rt_timer_request(struct rt_timer *rt)
60 int err = request_irq(rt->irq, rt_timer_irq, 0,
61 dev_name(rt->dev), rt);
63 dev_err(rt->dev, "failed to request irq\n");
66 rt_timer_w32(rt, TIMER_REG_TMR0CTL, t);
71 static int rt_timer_config(struct rt_timer *rt, unsigned long divisor)
73 if (rt->timer_freq < divisor)
74 rt->timer_div = rt->timer_freq;
76 rt->timer_div = divisor;
78 rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div);
83 static int rt_timer_enable(struct rt_timer *rt)
87 rt_timer_w32(rt, TIMER_REG_TMR0LOAD, rt->timer_freq / rt->timer_div);
89 t = rt_timer_r32(rt, TIMER_REG_TMR0CTL);
91 rt_timer_w32(rt, TIMER_REG_TMR0CTL, t);
98 struct rt_timer *rt;
101 rt = devm_kzalloc(&pdev->dev, sizeof(*rt), GFP_KERNEL);
102 if (!rt) {
107 rt->irq = platform_get_irq(pdev, 0);
108 if (rt->irq < 0)
109 return rt->irq;
111 rt->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
112 if (IS_ERR(rt->membase))
113 return PTR_ERR(rt->membase);
121 rt->timer_freq = clk_get_rate(clk) / TMR0CTL_PRESCALE_DIV;
122 if (!rt->timer_freq)
125 rt->dev = &pdev->dev;
126 platform_set_drvdata(pdev, rt);
128 rt_timer_request(rt);
129 rt_timer_config(rt, 2);
130 rt_timer_enable(rt);
132 dev_info(&pdev->dev, "maximum frequency is %luHz\n", rt->timer_freq);
145 .name = "rt-timer",