1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * ADLX345/346 Three-Axis Digital Accelerometers (SPI Interface)
12 #include <linux/spi/spi.h>
26 static int adxl34x_spi_read(struct device *dev, unsigned char reg)  in adxl34x_spi_read()
28 	struct spi_device *spi = to_spi_device(dev);  in adxl34x_spi_read()  local
33 	return spi_w8r8(spi, cmd);  in adxl34x_spi_read()
36 static int adxl34x_spi_write(struct device *dev,  in adxl34x_spi_write()
39 	struct spi_device *spi = to_spi_device(dev);  in adxl34x_spi_write()  local
45 	return spi_write(spi, buf, sizeof(buf));  in adxl34x_spi_write()
48 static int adxl34x_spi_read_block(struct device *dev,  in adxl34x_spi_read_block()
52 	struct spi_device *spi = to_spi_device(dev);  in adxl34x_spi_read_block()  local
56 	status = spi_write_then_read(spi, &reg, 1, buf, count);  in adxl34x_spi_read_block()
68 static int adxl34x_spi_probe(struct spi_device *spi)  in adxl34x_spi_probe()  argument
72 	/* don't exceed max specified SPI CLK frequency */  in adxl34x_spi_probe()
73 	if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) {  in adxl34x_spi_probe()
74 		dev_err(&spi->dev, "SPI CLK %d Hz too fast\n", spi->max_speed_hz);  in adxl34x_spi_probe()
75 		return -EINVAL;  in adxl34x_spi_probe()
78 	ac = adxl34x_probe(&spi->dev, spi->irq,  in adxl34x_spi_probe()
79 			   spi->max_speed_hz > MAX_FREQ_NO_FIFODELAY,  in adxl34x_spi_probe()
85 	spi_set_drvdata(spi, ac);  in adxl34x_spi_probe()
90 static int adxl34x_spi_remove(struct spi_device *spi)  in adxl34x_spi_remove()  argument
92 	struct adxl34x *ac = spi_get_drvdata(spi);  in adxl34x_spi_remove()
97 static int __maybe_unused adxl34x_spi_suspend(struct device *dev)  in adxl34x_spi_suspend()
99 	struct spi_device *spi = to_spi_device(dev);  in adxl34x_spi_suspend()  local
100 	struct adxl34x *ac = spi_get_drvdata(spi);  in adxl34x_spi_suspend()
107 static int __maybe_unused adxl34x_spi_resume(struct device *dev)  in adxl34x_spi_resume()
109 	struct spi_device *spi = to_spi_device(dev);  in adxl34x_spi_resume()  local
110 	struct adxl34x *ac = spi_get_drvdata(spi);  in adxl34x_spi_resume()
132 MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer SPI Bus Driver");