1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
36  * copyright (C) 2005-2006 Texas Instruments, Inc.
78 /* Each TWL device typically has more than one I2C address */
84 /* The TWL devices typically use 4 I2C address for the different internal
85  * register sets, plus one SmartReflex I2C address.
112 #define TWL_LOCK(_sc)             mtx_lock(&(_sc)->sc_mtx)
113 #define	TWL_UNLOCK(_sc)           mtx_unlock(&(_sc)->sc_mtx)
115 	mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->sc_dev), \
117 #define TWL_LOCK_DESTROY(_sc)     mtx_destroy(&_sc->sc_mtx);
118 #define TWL_ASSERT_LOCKED(_sc)    mtx_assert(&_sc->sc_mtx, MA_OWNED);
119 #define TWL_ASSERT_UNLOCKED(_sc)  mtx_assert(&_sc->sc_mtx, MA_NOTOWNED);
122  *	twl_is_4030 - returns true if the device is TWL4030
123  *	twl_is_6025 - returns true if the device is TWL6025
124  *	twl_is_6030 - returns true if the device is TWL6030
127  *	Returns a non-zero value if the device matches.
130  *	Returns a non-zero value if the device matches, otherwise zero.
136 	return (sc->sc_type == TWL_DEVICE_4030);  in twl_is_4030()
143 	return (sc->sc_type == TWL_DEVICE_6025);  in twl_is_6025()
150 	return (sc->sc_type == TWL_DEVICE_6030);  in twl_is_6030()
154  *	twl_read - read one or more registers from the TWL device
156  *	@nsub: the sub-module to read from
171 	uint8_t addr;  in twl_read()  local
177 	addr = sc->sc_subaddr_map[nsub];  in twl_read()
180 	if (addr == TWL_INVALID_CHIP_ID)  in twl_read()
184 	msg[0].slave = addr;  in twl_read()
189 	msg[1].slave = addr;  in twl_read()
197 		              addr, reg);  in twl_read()
205  *	twl_write - writes one or more registers to the TWL device
207  *	@nsub: the sub-module to read from
222 	uint8_t addr;  in twl_write()  local
236 	addr = sc->sc_subaddr_map[nsub];  in twl_write()
239 	if (addr == TWL_INVALID_CHIP_ID)  in twl_write()
243 	msg.slave = addr;  in twl_write()
250 		device_printf(sc->sc_dev, "iicbus write failed (adr:0x%02x, reg:0x%02x)\n",  in twl_write()
251 		              addr, reg);  in twl_write()
259  *	twl_test_present - checks if a device with given address is present
261  *	@addr: the address of the device to scan for
270 twl_test_present(struct twl_softc *sc, uint8_t addr)  in twl_test_present()  argument
276 	msg.slave = addr;  in twl_test_present()
281 	if (iicbus_transfer(sc->sc_dev, &msg, 1) != 0)  in twl_test_present()
288  *	twl_scan - scans the i2c bus for sub modules
291  *	TWL devices don't just have one i2c slave address, rather they have up to
293  *	function scans the bus for 4 possible sub-devices and stores the info
315 			device_printf(sc->sc_dev, "Found (sub)device at 0x%02x\n", (base + i));  in twl_scan()
320 	memcpy(sc->sc_subaddr_map, devs, TWL_MAX_SUBADDRS);  in twl_scan()
324 	config_intrhook_disestablish(&sc->sc_scan_hook);  in twl_scan()
328  *	twl_probe - 
357 	sc->sc_dev = dev;  in twl_probe()
358 	sc->sc_type = TWL_DEVICE_UNKNOWN;  in twl_probe()
362 			sc->sc_type = TWL_DEVICE_6030;  in twl_probe()
364 			sc->sc_type = TWL_DEVICE_6025;  in twl_probe()
366 			sc->sc_type = TWL_DEVICE_4030;  in twl_probe()
368 		if (sc->sc_type != TWL_DEVICE_UNKNOWN)  in twl_probe()
371 		/* Slide to the next sub-string. */  in twl_probe()
374 		len -= l;  in twl_probe()
377 	switch (sc->sc_type) {  in twl_probe()
401 	sc->sc_dev = dev;  in twl_attach()
405 	/* We have to wait until interrupts are enabled. I2C read and write  in twl_attach()
408 	sc->sc_scan_hook.ich_func = twl_scan;  in twl_attach()
409 	sc->sc_scan_hook.ich_arg = dev;  in twl_attach()
411 	if (config_intrhook_establish(&sc->sc_scan_hook) != 0)  in twl_attach()
415 	if ((sc->sc_vreg = device_add_child(dev, "twl_vreg", -1)) == NULL)  in twl_attach()
417 	if ((sc->sc_clks = device_add_child(dev, "twl_clks", -1)) == NULL)  in twl_attach()