1 // SPDX-License-Identifier: GPL-2.0-only
3  * arch/arm/mach-pxa/time.c
5  * PXA clocksource, clockevents, and OST interrupt handlers.
14 #include <linux/interrupt.h>
15 #include <linux/clk.h>
34 #define OIER		0x1C	/* OS Timer Interrupt Enable Register */
41 #define OIER_E0		(1 << 0)	/* Interrupt enable channel 0 */
73 	c->event_handler(c);  in pxa_ost0_interrupt()
88 	return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0;  in pxa_osmr0_set_next_event()
117 	 * the one-shot timer interrupt.  We adjust OSMR0 in preference  in pxa_timer_resume()
120 	if (osmr[0] - oscr < MIN_OSCR_DELTA)  in pxa_timer_resume()
179 	struct clk *clk;  in pxa_timer_dt_init()  local
186 		return -ENXIO;  in pxa_timer_dt_init()
189 	clk = of_clk_get(np, 0);  in pxa_timer_dt_init()
190 	if (IS_ERR(clk)) {  in pxa_timer_dt_init()
191 		pr_crit("%pOFn: unable to get clk\n", np);  in pxa_timer_dt_init()
192 		return PTR_ERR(clk);  in pxa_timer_dt_init()
195 	ret = clk_prepare_enable(clk);  in pxa_timer_dt_init()
201 	/* we are only interested in OS-timer0 irq */  in pxa_timer_dt_init()
204 		pr_crit("%pOFn: unable to parse OS-timer0 irq\n", np);  in pxa_timer_dt_init()
205 		return -EINVAL;  in pxa_timer_dt_init()
208 	return pxa_timer_common_init(irq, clk_get_rate(clk));  in pxa_timer_dt_init()
210 TIMER_OF_DECLARE(pxa_timer, "marvell,pxa-timer", pxa_timer_dt_init);
213  * Legacy timer init for non device-tree boards.
217 	struct clk *clk;  in pxa_timer_nodt_init()  local
220 	clk = clk_get(NULL, "OSTIMER0");  in pxa_timer_nodt_init()
221 	if (clk && !IS_ERR(clk)) {  in pxa_timer_nodt_init()
222 		clk_prepare_enable(clk);  in pxa_timer_nodt_init()
223 		pxa_timer_common_init(irq, clk_get_rate(clk));  in pxa_timer_nodt_init()
225 		pr_crit("%s: unable to get clk\n", __func__);  in pxa_timer_nodt_init()