drivers/clocksource/timer-pistachio.c

1 // SPDX-License-Identifier: GPL-2.0
3  * Pistachio clocksource based on general-purpose timers
10 #include <linux/clk.h>
80 	raw_spin_lock_irqsave(&pcs->lock, flags);  in pistachio_clocksource_read_cycles()
81 	overflow = gpt_readl(pcs->base, TIMER_CURRENT_OVERFLOW_VALUE, 0);  in pistachio_clocksource_read_cycles()
82 	counter = gpt_readl(pcs->base, TIMER_CURRENT_VALUE, 0);  in pistachio_clocksource_read_cycles()
83 	raw_spin_unlock_irqrestore(&pcs->lock, flags);  in pistachio_clocksource_read_cycles()
99 	val = gpt_readl(pcs->base, TIMER_CFG, timeridx);  in pistachio_clksrc_set_mode()
105 	gpt_writel(pcs->base, val, TIMER_CFG, timeridx);  in pistachio_clksrc_set_mode()
114 	gpt_writel(pcs->base, RELOAD_VALUE, TIMER_RELOAD_VALUE, timeridx);  in pistachio_clksrc_enable()
151 	struct clk *sys_clk, *fast_clk;  in pistachio_clksrc_of_init()
159 		return -ENXIO;  in pistachio_clksrc_of_init()
162 	periph_regs = syscon_regmap_lookup_by_phandle(node, "img,cr-periph");  in pistachio_clksrc_of_init()
169 	/* Switch to using the fast counter clock */  in pistachio_clksrc_of_init()
181 	fast_clk = of_clk_get_by_name(node, "fast");  in pistachio_clksrc_of_init()
215 TIMER_OF_DECLARE(pistachio_gptimer, "img,pistachio-gptimer",