1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
30  *  - ISL1209 = 2B sram, tamper/event timestamp
31  *  - ISL1218 = 8B sram, DS13xx pin compatible (but not software compatible)
32  *  - ISL1219 = 2B sram, tamper/event timestamp
33  *  - ISL1220 = 8B sram, separate Fout
34  *  - ISL1221 = 2B sram, separate Fout, tamper/event timestamp
63  * in 'B' that stands for "bar" and it is an active-low signal; something named
64  * "EVENB" implies 1=event-disable, 0=event-enable.
70 #define	  ISL12XX_SR_ARST	  (1u << 7)	/*   Auto-reset on status read */
109 #define	ISL12XX_24HR_FLAG	(1u << 7)	/* Hours register 24-hr mode */
110 #define	ISL12XX_PM_FLAG		(1u << 5)	/* Hours register PM flag */
111 #define	ISL12xx_12HR_MASK	0x1f		/* Hours mask in AM/PM mode */
112 #define	ISL12xx_24HR_MASK	0x3f		/* Hours mask in 24-hr mode */
143  * iicbus_acquire_bus() calls with a non-recursive wait at the entry of our API
153 	return (iicdev_readfrom(sc->dev, reg, data, 1, WAITFLAGS));  in isl12xx_read1()
160 	return (iicdev_writeto(sc->dev, reg, &val, 1, WAITFLAGS));  in isl12xx_write1()
169 	config_intrhook_disestablish(&sc->init_hook);  in isl12xx_init()
172 	 * Check the clock-stopped/power-fail bit, just so we can report it to  in isl12xx_init()
177 		device_printf(sc->dev,  in isl12xx_init()
184 	clock_register_flags(sc->dev, 1000000, CLOCKF_SETTIME_NO_ADJ);  in isl12xx_init()
185 	clock_schedule(sc->dev, 1);  in isl12xx_init()
196 	if (ofw_bus_search_compatible(dev, compat_data)->ocd_data != 0) {  in isl12xx_probe()
209 	sc->dev = dev;  in isl12xx_attach()
210 	sc->busdev = device_get_parent(sc->dev);  in isl12xx_attach()
216 	sc->init_hook.ich_func = isl12xx_init;  in isl12xx_attach()
217 	sc->init_hook.ich_arg = sc;  in isl12xx_attach()
218 	if (config_intrhook_establish(&sc->init_hook) != 0)  in isl12xx_attach()
244 	if ((err = iicbus_request_bus(sc->busdev, sc->dev, IIC_WAIT)) == 0) {  in isl12xx_gettime()
246 			err = iicdev_readfrom(sc->dev, ISL12XX_SC_REG, &tregs,  in isl12xx_gettime()
249 		iicbus_release_bus(sc->busdev, sc->dev);  in isl12xx_gettime()
258 	/* If chip is in AM/PM mode remember that for when we set time. */  in isl12xx_gettime()
262 		sc->use_ampm = true;  in isl12xx_gettime()
275 	clock_dbgprint_bcd(sc->dev, CLOCK_DBG_READ, &bct);   in isl12xx_gettime()
276 	return (clock_bcd_to_ts(&bct, ts, sc->use_ampm));  in isl12xx_gettime()
289 	 * We request a timespec with no resolution-adjustment.  That also  in isl12xx_settime()
292 	ts->tv_sec -= utc_offset();  in isl12xx_settime()
293 	ts->tv_nsec = 0;  in isl12xx_settime()
294 	clock_ts_to_bcd(ts, &bct, sc->use_ampm);  in isl12xx_settime()
295 	clock_dbgprint_bcd(sc->dev, CLOCK_DBG_WRITE, &bct);   in isl12xx_settime()
297 	/* If the chip is in AM/PM mode, set flags as needed. */  in isl12xx_settime()
298 	if (!sc->use_ampm)  in isl12xx_settime()
316 	 * write a 1, so just always OR-in all the W0C bits to be sure we never  in isl12xx_settime()
318 	 * whole read-modify-write sequence.  in isl12xx_settime()
320 	if ((err = iicbus_request_bus(sc->busdev, sc->dev, IIC_WAIT)) != 0)  in isl12xx_settime()
325 			err = iicdev_writeto(sc->dev, ISL12XX_SC_REG, &tregs,  in isl12xx_settime()
331 	iicbus_release_bus(sc->busdev, sc->dev);  in isl12xx_settime()