1 files changed, 126 insertions, 0 deletions
diff --git a/drivers/staging/iio/adc/ad7606_spi.c b/drivers/staging/iio/adc/ad7606_spi.c
new file mode 100644
index 000000000000..d738491222f2
--- /dev/null
+++ b/drivers/staging/iio/adc/ad7606_spi.c
@@ -0,0 +1,126 @@
+/*
+ * AD7606 SPI ADC driver
+ *
+ * Copyright 2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/spi/spi.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include "ad7606.h"
+
+#define MAX_SPI_FREQ_HZ		23500000	/* VDRIVE above 4.75 V */
+
+static int ad7606_spi_read_block(struct device *dev,
+				 int count, void *buf)
+{
+	struct spi_device *spi = to_spi_device(dev);
+	int i, ret;
+	unsigned short *data = buf;
+
+	ret = spi_read(spi, (u8 *)buf, count * 2);
+	if (ret < 0) {
+		dev_err(&spi->dev, "SPI read error\n");
+		return ret;
+	}
+
+	for (i = 0; i < count; i++)
+		data[i] = be16_to_cpu(data[i]);
+
+	return 0;
+}
+
+static const struct ad7606_bus_ops ad7606_spi_bops = {
+	.read_block	= ad7606_spi_read_block,
+};
+
+static int __devinit ad7606_spi_probe(struct spi_device *spi)
+{
+	struct ad7606_state *st;
+
+	st = ad7606_probe(&spi->dev, spi->irq, NULL,
+			   spi_get_device_id(spi)->driver_data,
+			   &ad7606_spi_bops);
+
+	if (IS_ERR(st))
+		return PTR_ERR(st);
+
+	spi_set_drvdata(spi, st);
+
+	return 0;
+}
+
+static int __devexit ad7606_spi_remove(struct spi_device *spi)
+{
+	struct ad7606_state *st = dev_get_drvdata(&spi->dev);
+
+	return ad7606_remove(st);
+}
+
+#ifdef CONFIG_PM
+static int ad7606_spi_suspend(struct device *dev)
+{
+	struct ad7606_state *st = dev_get_drvdata(dev);
+
+	ad7606_suspend(st);
+
+	return 0;
+}
+
+static int ad7606_spi_resume(struct device *dev)
+{
+	struct ad7606_state *st = dev_get_drvdata(dev);
+
+	ad7606_resume(st);
+
+	return 0;
+}
+
+static const struct dev_pm_ops ad7606_pm_ops = {
+	.suspend = ad7606_spi_suspend,
+	.resume  = ad7606_spi_resume,
+};
+#define AD7606_SPI_PM_OPS (&ad7606_pm_ops)
+
+#else
+#define AD7606_SPI_PM_OPS NULL
+#endif
+
+static const struct spi_device_id ad7606_id[] = {
+	{"ad7606-8", ID_AD7606_8},
+	{"ad7606-6", ID_AD7606_6},
+	{"ad7606-4", ID_AD7606_4},
+	{}
+};
+
+static struct spi_driver ad7606_driver = {
+	.driver = {
+		.name = "ad7606",
+		.bus = &spi_bus_type,
+		.owner = THIS_MODULE,
+		.pm    = AD7606_SPI_PM_OPS,
+	},
+	.probe = ad7606_spi_probe,
+	.remove = __devexit_p(ad7606_spi_remove),
+	.id_table = ad7606_id,
+};
+
+static int __init ad7606_spi_init(void)
+{
+	return spi_register_driver(&ad7606_driver);
+}
+module_init(ad7606_spi_init);
+
+static void __exit ad7606_spi_exit(void)
+{
+	spi_unregister_driver(&ad7606_driver);
+}
+module_exit(ad7606_spi_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:ad7606_spi");