1 // SPDX-License-Identifier: GPL-2.0
3  * Analog Devices AD7091R8 12-bit SAR ADC driver
15 #include "ad7091r-base.h"
31 	/* AD7091R-2/-4/-8 don't set sample/command/autocycle mode in conf reg */  in ad7091r8_set_mode()
32 	st->mode = mode;  in ad7091r8_set_mode()
43 	.channels = ad7091r##_n##_channels,				\
44 	.num_channels = ARRAY_SIZE(ad7091r##_n##_channels),		\
52 	.channels = ad7091r##_n##_channels_irq,				\
53 	.num_channels = ARRAY_SIZE(ad7091r##_n##_channels_irq),		\
91 	AD7091R_CHANNEL(4, 12, NULL, 0),
102 	AD7091R_CHANNEL(4, 12, ad7091r_events, ARRAY_SIZE(ad7091r_events)),
110 	gpiod_set_value_cansleep(st->convst_gpio, 1);  in ad7091r_pulse_convst()
111 	gpiod_set_value_cansleep(st->convst_gpio, 0);  in ad7091r_pulse_convst()
118 	struct spi_device *spi = container_of(st->dev, struct spi_device, dev);  in ad7091r_regmap_bus_reg_read()
123 			.tx_buf = &st->tx_buf,  in ad7091r_regmap_bus_reg_read()
127 			.rx_buf = &st->rx_buf,  in ad7091r_regmap_bus_reg_read()
135 	st->tx_buf = cpu_to_be16(reg << 11);  in ad7091r_regmap_bus_reg_read()
141 	*val = be16_to_cpu(st->rx_buf);  in ad7091r_regmap_bus_reg_read()
149 	struct spi_device *spi = container_of(st->dev, struct spi_device, dev);  in ad7091r_regmap_bus_reg_write()
152 	 * AD7091R-2/-4/-8 protocol (datasheet page 31) is to do a single SPI  in ad7091r_regmap_bus_reg_write()
155 	st->tx_buf = cpu_to_be16(FIELD_PREP(AD7091R8_REG_DATA_MSK, val) |  in ad7091r_regmap_bus_reg_write()
159 	return spi_write(spi, &st->tx_buf, 2);  in ad7091r_regmap_bus_reg_write()
170 	[AD7091R2_INFO] = AD7091R_SPI_CHIP_INFO(2, "ad7091r-2"),
171 	[AD7091R4_INFO] = AD7091R_SPI_CHIP_INFO(4, "ad7091r-4"),
172 	[AD7091R4_INFO_IRQ] = AD7091R_SPI_CHIP_INFO_IRQ(4, "ad7091r-4"),
173 	[AD7091R8_INFO] = AD7091R_SPI_CHIP_INFO(8, "ad7091r-8"),
174 	[AD7091R8_INFO_IRQ] = AD7091R_SPI_CHIP_INFO_IRQ(8, "ad7091r-8")
178 static const struct regmap_config ad7091r4_reg_conf = AD7091R_SPI_REGMAP_CONFIG(4);
184 	st->map = devm_regmap_init(st->dev, &ad7091r8_regmap_bus, st,  in ad7091r8_regmap_init()
190 	st->convst_gpio = devm_gpiod_get(st->dev, "convst", GPIOD_OUT_LOW);  in ad7091r8_gpio_setup()
191 	if (IS_ERR(st->convst_gpio))  in ad7091r8_gpio_setup()
192 		return dev_err_probe(st->dev, PTR_ERR(st->convst_gpio),  in ad7091r8_gpio_setup()
195 	st->reset_gpio = devm_gpiod_get_optional(st->dev, "reset",  in ad7091r8_gpio_setup()
197 	if (IS_ERR(st->reset_gpio))  in ad7091r8_gpio_setup()
198 		return dev_err_probe(st->dev, PTR_ERR(st->reset_gpio),  in ad7091r8_gpio_setup()
201 	if (st->reset_gpio) {  in ad7091r8_gpio_setup()
203 		gpiod_set_value_cansleep(st->reset_gpio, 0);  in ad7091r8_gpio_setup()
238 		return -EINVAL;  in ad7091r8_spi_probe()
240 	return ad7091r_probe(&spi->dev, init_info, spi->irq);  in ad7091r8_spi_probe()