1 // SPDX-License-Identifier: GPL-2.0
4  * x9250.c  --  Renesas X9250 potentiometers IIO driver
12 #include <linux/gpio/consumer.h>
13 #include <linux/iio/iio.h>
16 #include <linux/regulator/consumer.h>
43 	return spi_write_then_read(x9250->spi, txbuf, ARRAY_SIZE(txbuf), NULL, 0);  in x9250_write8()
53 	return spi_write_then_read(x9250->spi, txbuf, ARRAY_SIZE(txbuf), val, 1);  in x9250_read8()
77 	int ch = chan->channel;  in x9250_read_raw()
90 		*val = 1000 * x9250->cfg->kohms;  in x9250_read_raw()
95 	return -EINVAL;  in x9250_read_raw()
111 	return -EINVAL;  in x9250_read_avail()
118 	int ch = chan->channel;  in x9250_write_raw()
122 		return -EINVAL;  in x9250_write_raw()
125 		return -EINVAL;  in x9250_write_raw()
127 	gpiod_set_value_cansleep(x9250->wp_gpio, 0);  in x9250_write_raw()
129 	gpiod_set_value_cansleep(x9250->wp_gpio, 1);  in x9250_write_raw()
162 	ret = devm_regulator_bulk_get_enable(&spi->dev, ARRAY_SIZE(x9250_regulator_names),  in x9250_probe()
165 		return dev_err_probe(&spi->dev, ret, "Failed to get regulators\n");  in x9250_probe()
168 	 * The x9250 needs a 5ms maximum delay after the power-supplies are set  in x9250_probe()
173 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*x9250));  in x9250_probe()
175 		return -ENOMEM;  in x9250_probe()
178 	x9250->spi = spi;  in x9250_probe()
179 	x9250->cfg = spi_get_device_match_data(spi);  in x9250_probe()
180 	x9250->wp_gpio = devm_gpiod_get_optional(&spi->dev, "wp", GPIOD_OUT_LOW);  in x9250_probe()
181 	if (IS_ERR(x9250->wp_gpio))  in x9250_probe()
182 		return dev_err_probe(&spi->dev, PTR_ERR(x9250->wp_gpio),  in x9250_probe()
185 	indio_dev->info = &x9250_info;  in x9250_probe()
186 	indio_dev->channels = x9250_channels;  in x9250_probe()
187 	indio_dev->num_channels = ARRAY_SIZE(x9250_channels);  in x9250_probe()
188 	indio_dev->name = x9250->cfg->name;  in x9250_probe()
190 	return devm_iio_device_register(&spi->dev, indio_dev);  in x9250_probe()