platforms/8xx/m8xx_setup.c

1 // SPDX-License-Identifier: GPL-2.0
42 /* per-board overridable init_internal_rtc() function. */
49 	clrbits16(&sys_tmr->sit_rtcsc, (RTCSC_SIE | RTCSC_ALE));  in init_internal_rtc()
52 	setbits16(&sys_tmr->sit_rtcsc, (RTCSC_RTF | RTCSC_RTE));  in init_internal_rtc()
62 	/* The cpu node should have timebase and clock frequency properties */  in get_freq()
78 /* The decrementer counts at the system (internal) clock frequency divided by
94 	out_be32(&clk_r1->cark_sccrk, ~KAPWR_KEY);  in mpc8xx_calibrate_decr()
95 	out_be32(&clk_r1->cark_sccrk, KAPWR_KEY);  in mpc8xx_calibrate_decr()
100 	setbits32(&clk_r2->car_sccr, 0x02000000);  in mpc8xx_calibrate_decr()
103 	/* Processor frequency is MHz.  in mpc8xx_calibrate_decr()
106 	if (!get_freq("clock-frequency", &ppc_proc_freq))  in mpc8xx_calibrate_decr()
107 		printk(KERN_ERR "WARNING: Estimating processor frequency "  in mpc8xx_calibrate_decr()
111 	printk("Decrementer Frequency = 0x%lx\n", ppc_tb_freq);  in mpc8xx_calibrate_decr()
113 	/* Perform some more timer/timebase initialization.  This used  in mpc8xx_calibrate_decr()
129 	out_be32(&sys_tmr1->sitk_tbscrk, ~KAPWR_KEY);  in mpc8xx_calibrate_decr()
130 	out_be32(&sys_tmr1->sitk_rtcsck, ~KAPWR_KEY);  in mpc8xx_calibrate_decr()
131 	out_be32(&sys_tmr1->sitk_tbk, ~KAPWR_KEY);  in mpc8xx_calibrate_decr()
132 	out_be32(&sys_tmr1->sitk_tbscrk, KAPWR_KEY);  in mpc8xx_calibrate_decr()
133 	out_be32(&sys_tmr1->sitk_rtcsck, KAPWR_KEY);  in mpc8xx_calibrate_decr()
134 	out_be32(&sys_tmr1->sitk_tbk, KAPWR_KEY);  in mpc8xx_calibrate_decr()
139 	/* Enabling the decrementer also enables the timebase interrupts  in mpc8xx_calibrate_decr()
141 	 * we have to enable the timebase).  The decrementer interrupt  in mpc8xx_calibrate_decr()
150 	out_be16(&sys_tmr2->sit_tbscr, ((1 << (7 - (irq/2))) << 8) |  in mpc8xx_calibrate_decr()
161  * modify, and re-lock.
174 	out_be32(&sys_tmr1->sitk_rtck, KAPWR_KEY);  in mpc8xx_set_rtc_time()
175 	out_be32(&sys_tmr2->sit_rtc, (u32)time);  in mpc8xx_set_rtc_time()
176 	out_be32(&sys_tmr1->sitk_rtck, ~KAPWR_KEY);  in mpc8xx_set_rtc_time()
189 	data = in_be32(&sys_tmr->sit_rtc);  in mpc8xx_get_rtc_time()
202 	setbits32(&clk_r->car_plprcr, 0x00000080);  in mpc8xx_restart()
207 	in_8(&clk_r->res[0]);  in mpc8xx_restart()