iio: light: add support for UVIS25 sensor
add support for STMicroelectronics UVIS25 uv sensor
http://www.st.com/resource/en/datasheet/uvis25.pdf
- continuos mode support
- i2c support
- spi support
- trigger mode support
- system PM support
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
diff --git a/drivers/iio/light/st_uvis25_spi.c b/drivers/iio/light/st_uvis25_spi.c
new file mode 100644
index 0000000..e697e14
--- /dev/null
+++ b/drivers/iio/light/st_uvis25_spi.c
@@ -0,0 +1,68 @@
+/*
+ * STMicroelectronics uvis25 spi driver
+ *
+ * Copyright 2017 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "st_uvis25.h"
+
+#define UVIS25_SENSORS_SPI_READ BIT(7)
+#define UVIS25_SPI_AUTO_INCREMENT BIT(6)
+
+const struct regmap_config st_uvis25_spi_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .read_flag_mask = UVIS25_SENSORS_SPI_READ | UVIS25_SPI_AUTO_INCREMENT,
+ .write_flag_mask = UVIS25_SPI_AUTO_INCREMENT,
+};
+
+static int st_uvis25_spi_probe(struct spi_device *spi)
+{
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_spi(spi, &st_uvis25_spi_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&spi->dev, "Failed to register spi regmap %d\n",
+ (int)PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return st_uvis25_probe(&spi->dev, spi->irq, regmap);
+}
+
+static const struct of_device_id st_uvis25_spi_of_match[] = {
+ { .compatible = "st,uvis25", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, st_uvis25_spi_of_match);
+
+static const struct spi_device_id st_uvis25_spi_id_table[] = {
+ { ST_UVIS25_DEV_NAME },
+ {},
+};
+MODULE_DEVICE_TABLE(spi, st_uvis25_spi_id_table);
+
+static struct spi_driver st_uvis25_driver = {
+ .driver = {
+ .name = "st_uvis25_spi",
+ .pm = &st_uvis25_pm_ops,
+ .of_match_table = of_match_ptr(st_uvis25_spi_of_match),
+ },
+ .probe = st_uvis25_spi_probe,
+ .id_table = st_uvis25_spi_id_table,
+};
+module_spi_driver(st_uvis25_driver);
+
+MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>");
+MODULE_DESCRIPTION("STMicroelectronics uvis25 spi driver");
+MODULE_LICENSE("GPL v2");
