1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
62 	{"i2c-gpio",  true}, /* Standard devicetree compat string */
83 	node = ofw_bus_get_node(sc->dev);  in gpioiic_setup_fdt_pins()
87 	 * property.  The modern bindings specify separate scl-gpios and  in gpioiic_setup_fdt_pins()
88 	 * sda-gpios properties.  We cope with whichever is present.  in gpioiic_setup_fdt_pins()
91 		if ((err = gpio_pin_get_by_ofw_idx(sc->dev, node,  in gpioiic_setup_fdt_pins()
92 		    GPIOIIC_SCL_DFLT, &sc->sclpin)) != 0) {  in gpioiic_setup_fdt_pins()
93 			device_printf(sc->dev, "invalid gpios property\n");  in gpioiic_setup_fdt_pins()
96 		if ((err = gpio_pin_get_by_ofw_idx(sc->dev, node,  in gpioiic_setup_fdt_pins()
97 		    GPIOIIC_SDA_DFLT, &sc->sdapin)) != 0) {  in gpioiic_setup_fdt_pins()
98 			device_printf(sc->dev, "ivalid gpios property\n");  in gpioiic_setup_fdt_pins()
102 		if ((err = gpio_pin_get_by_ofw_property(sc->dev, node,  in gpioiic_setup_fdt_pins()
103 		    "scl-gpios", &sc->sclpin)) != 0) {  in gpioiic_setup_fdt_pins()
104 			device_printf(sc->dev, "missing scl-gpios property\n");  in gpioiic_setup_fdt_pins()
107 		if ((err = gpio_pin_get_by_ofw_property(sc->dev, node,  in gpioiic_setup_fdt_pins()
108 		    "sda-gpios", &sc->sdapin)) != 0) {  in gpioiic_setup_fdt_pins()
109 			device_printf(sc->dev, "missing sda-gpios property\n");  in gpioiic_setup_fdt_pins()
124 	devname = device_get_name(sc->dev);  in gpioiic_setup_hinted_pins()
125 	unit = device_get_unit(sc->dev);  in gpioiic_setup_hinted_pins()
126 	busdev = device_get_parent(sc->dev);  in gpioiic_setup_hinted_pins()
139 	/* Make sure there were hints for at least two pins. */  in gpioiic_setup_hinted_pins()
140 	numpins = gpiobus_get_npins(sc->dev);  in gpioiic_setup_hinted_pins()
151 		device_printf(sc->dev,   in gpioiic_setup_hinted_pins()
152 		    "invalid pins hint; it must contain at least %d pins\n",  in gpioiic_setup_hinted_pins()
158 	 * Our parent bus has already parsed the pins hint and it will use that  in gpioiic_setup_hinted_pins()
160 	 * handle the scl/sda index hints that tell us which of the two pins is  in gpioiic_setup_hinted_pins()
164 	if ((err = resource_int_value(devname, unit, "scl", &sclnum)) != 0)  in gpioiic_setup_hinted_pins()
167 		device_printf(sc->dev, "invalid scl hint %d\n", sclnum);  in gpioiic_setup_hinted_pins()
170 	if ((err = resource_int_value(devname, unit, "sda", &sdanum)) != 0)  in gpioiic_setup_hinted_pins()
173 		device_printf(sc->dev, "invalid sda hint %d\n", sdanum);  in gpioiic_setup_hinted_pins()
177 	/* Allocate gpiobus_pin structs for the pins we found above. */  in gpioiic_setup_hinted_pins()
178 	if ((err = gpio_pin_get_by_child_index(sc->dev, sclnum,  in gpioiic_setup_hinted_pins()
179 	    &sc->sclpin)) != 0)  in gpioiic_setup_hinted_pins()
181 	if ((err = gpio_pin_get_by_child_index(sc->dev, sdanum,  in gpioiic_setup_hinted_pins()
182 	    &sc->sdapin)) != 0)  in gpioiic_setup_hinted_pins()
194 		gpio_pin_setflags(sc->sdapin, GPIO_PIN_INPUT);  in gpioiic_setsda()
196 		gpio_pin_setflags(sc->sdapin,  in gpioiic_setsda()
198 		gpio_pin_set_active(sc->sdapin, 0);  in gpioiic_setsda()
208 		gpio_pin_setflags(sc->sclpin, GPIO_PIN_INPUT);  in gpioiic_setscl()
210 		gpio_pin_setflags(sc->sclpin,  in gpioiic_setscl()
212 		gpio_pin_set_active(sc->sclpin, 0);  in gpioiic_setscl()
222 	gpio_pin_setflags(sc->sclpin, GPIO_PIN_INPUT);  in gpioiic_getscl()
223 	gpio_pin_is_active(sc->sclpin, &val);  in gpioiic_getscl()
233 	gpio_pin_setflags(sc->sdapin, GPIO_PIN_INPUT);  in gpioiic_getsda()
234 	gpio_pin_is_active(sc->sdapin, &val);  in gpioiic_getsda()
243 	/* Stop driving the bus pins. */  in gpioiic_reset()
244 	gpio_pin_setflags(sc->sdapin, GPIO_PIN_INPUT);  in gpioiic_reset()
245 	gpio_pin_setflags(sc->sclpin, GPIO_PIN_INPUT);  in gpioiic_reset()
255 	device_delete_children(sc->dev);  in gpioiic_cleanup()
257 	if (sc->sclpin != NULL)  in gpioiic_cleanup()
258 		gpio_pin_release(sc->sclpin);  in gpioiic_cleanup()
260 	if (sc->sdapin != NULL)  in gpioiic_cleanup()
261 		gpio_pin_release(sc->sdapin);  in gpioiic_cleanup()
278 	    ofw_bus_search_compatible(dev, compat_data)->ocd_data)  in gpioiic_probe()
293 	sc->dev = dev;  in gpioiic_attach()
295 	/* Acquire our gpio pins. */  in gpioiic_attach()
302 		device_printf(sc->dev, "no pins configured\n");  in gpioiic_attach()
311 	 * that can provide our pins.  in gpioiic_attach()
313 	device_printf(dev, "SCL pin: %s:%d, SDA pin: %s:%d\n",  in gpioiic_attach()
315 	    device_get_nameunit(GPIO_GET_BUS(sc->sclpin->dev)), sc->sclpin->pin,  in gpioiic_attach()
316 	    device_get_nameunit(GPIO_GET_BUS(sc->sdapin->dev)), sc->sdapin->pin);  in gpioiic_attach()
318 	    device_get_nameunit(device_get_parent(dev)), sc->sclpin->pin,  in gpioiic_attach()
319 	    device_get_nameunit(device_get_parent(dev)), sc->sdapin->pin);  in gpioiic_attach()
323 	device_add_child(sc->dev, "iicbb", DEVICE_UNIT_ANY);  in gpioiic_attach()