1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
40 #include <dev/iicbus/iiconf.h>
56 #define	AD7418_VOLT	4	/* ADC aka Voltage (r/o) */
69 static int ad7418_read_1(device_t dev, int reg);
70 static int ad7418_write_1(device_t dev, int reg, int v);
73 ad7418_probe(device_t dev)  in ad7418_probe()  argument
76 	device_set_desc(dev, "Analog Devices AD7418 ADC");  in ad7418_probe()
86 	sx_xlock(&sc->sc_lock);  in ad7418_sysctl_temp()
88 	temp = (sc->sc_curtemp / 64) * 25;  in ad7418_sysctl_temp()
89 	sx_xunlock(&sc->sc_lock);  in ad7418_sysctl_temp()
99 	sx_xlock(&sc->sc_lock);  in ad7418_sysctl_voltage()
101 	volt = (sc->sc_curvolt >> 6) * 564 / 10;  in ad7418_sysctl_voltage()
102 	sx_xunlock(&sc->sc_lock);  in ad7418_sysctl_voltage()
107 ad7418_attach(device_t dev)  in ad7418_attach()  argument
109 	struct ad7418_softc *sc = device_get_softc(dev);  in ad7418_attach()
110 	struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);  in ad7418_attach()
111 	struct sysctl_oid *tree = device_get_sysctl_tree(dev);  in ad7418_attach()
114 	sc->sc_dev = dev;  in ad7418_attach()
115 	sc->sc_lastupdate = ticks - hz;  in ad7418_attach()
117 	sx_init(&sc->sc_lock, "ad7418");  in ad7418_attach()
127 	conf = ad7418_read_1(dev, AD7418_CONF);  in ad7418_attach()
129 		ad7418_write_1(dev, AD7418_CONF, conf &~ AD7418_CONF_SHUTDOWN);  in ad7418_attach()
135 ad7418_read_1(device_t dev, int reg)   in ad7418_read_1()  argument
143 	return iicbus_transfer(dev, msgs, 2) != 0 ? -1 : data[0];  in ad7418_read_1()
147 ad7418_write_1(device_t dev, int reg, int v)   in ad7418_write_1()  argument
156 	return iicbus_transfer(dev, msgs, 1);  in ad7418_write_1()
162 	if (sc->sc_curchan == chan)  in ad7418_set_channel()
164 	ad7418_write_1(sc->sc_dev, AD7418_CONF,   in ad7418_set_channel()
165 	    (ad7418_read_1(sc->sc_dev, AD7418_CONF) &~ AD7418_CONF_CHAN)|chan);  in ad7418_set_channel()
166 	sc->sc_curchan = chan;  in ad7418_set_channel()
179 ad7418_read_2(device_t dev, int reg)   in ad7418_read_2()  argument
188 	return iicbus_transfer(dev, msgs, 2) != 0 ?  in ad7418_read_2()
189 		-1 : ((data[0] << 8) | data[1]);  in ad7418_read_2()
197 	sx_assert(&sc->sc_lock, SA_XLOCKED);  in ad7418_update()
199 	if (ticks - sc->sc_lastupdate > hz) {  in ad7418_update()
201 		v = ad7418_read_2(sc->sc_dev, AD7418_TEMP);  in ad7418_update()
203 			sc->sc_curtemp = v;  in ad7418_update()
205 		v = ad7418_read_2(sc->sc_dev, AD7418_VOLT);  in ad7418_update()
207 			sc->sc_curvolt = v;  in ad7418_update()
208 		sc->sc_lastupdate = ticks;  in ad7418_update()