1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * ADGS1408/ADGS1409 SPI MUX driver
11 #include <linux/mux/driver.h>
36 static int adgs1408_set(struct mux_control *mux, int state)  in adgs1408_set()  argument
38 	struct spi_device *spi = to_spi_device(mux->chip->dev.parent);  in adgs1408_set()
55 	struct device *dev = &spi->dev;  in adgs1408_probe()
58 	struct mux_control *mux;  in adgs1408_probe()  local
64 		chip_id = spi_get_device_id(spi)->driver_data;  in adgs1408_probe()
70 	mux_chip->ops = &adgs1408_ops;  in adgs1408_probe()
76 	ret = device_property_read_u32(dev, "idle-state", (u32 *)&idle_state);  in adgs1408_probe()
80 	mux = mux_chip->mux;  in adgs1408_probe()
83 		mux->states = 8;  in adgs1408_probe()
85 		mux->states = 4;  in adgs1408_probe()
91 		/* adgs1409 supports only 4 states */  in adgs1408_probe()
92 		if (idle_state < mux->states) {  in adgs1408_probe()
93 			mux->idle_state = idle_state;  in adgs1408_probe()
98 		dev_err(dev, "invalid idle-state %d\n", idle_state);  in adgs1408_probe()
99 		return -EINVAL;  in adgs1408_probe()
130 MODULE_DESCRIPTION("Analog Devices ADGS1408 MUX driver");