---

yaml
---
r: 198294
b: refs/heads/master
c: 6c536e4
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0c53b9fbcca8870e4f4b248f4ed5fdadd43a01b6
+refs/heads/master: 6c536e4ce8edd61fdc4ab68e19ae164a54fc958f

trunk/drivers/misc/Kconfig

@@ -14,11 +14,15 @@ menuconfig MISC_DEVICES
 if MISC_DEVICES
 
 config AD525X_DPOT
-	tristate "Analog Devices AD525x Digital Potentiometers"
-	depends on I2C && SYSFS
+	tristate "Analog Devices Digital Potentiometers"
+	depends on (I2C || SPI) && SYSFS
 	help
 	  If you say yes here, you get support for the Analog Devices
-	  AD5258, AD5259, AD5251, AD5252, AD5253, AD5254 and AD5255
+	  AD5258, AD5259, AD5251, AD5252, AD5253, AD5254, AD5255
+	  AD5160, AD5161, AD5162, AD5165, AD5200, AD5201, AD5203,
+	  AD5204, AD5206, AD5207, AD5231, AD5232, AD5233, AD5235,
+	  AD5260, AD5262, AD5263, AD5290, AD5291, AD5292, AD5293,
+	  AD7376, AD8400, AD8402, AD8403, ADN2850
 	  digital potentiometer chips.
 
 	  See Documentation/misc-devices/ad525x_dpot.txt for the
@@ -27,6 +31,26 @@ config AD525X_DPOT
 	  This driver can also be built as a module.  If so, the module
 	  will be called ad525x_dpot.
 
+config AD525X_DPOT_I2C
+	tristate "support I2C bus connection"
+	depends on AD525X_DPOT && I2C
+	help
+	  Say Y here if you have a digital potentiometers hooked to an I2C bus.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad525x_dpot-i2c.
+
+config AD525X_DPOT_SPI
+	tristate "support SPI bus connection"
+	depends on AD525X_DPOT && SPI_MASTER
+	help
+	  Say Y here if you have a digital potentiometers hooked to an SPI bus.
+
+	  If unsure, say N (but it's safe to say "Y").
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called ad525x_dpot-spi.
+
 config ATMEL_PWM
 	tristate "Atmel AT32/AT91 PWM support"
 	depends on AVR32 || ARCH_AT91SAM9263 || ARCH_AT91SAM9RL || ARCH_AT91CAP9

trunk/drivers/misc/Makefile

@@ -4,6 +4,8 @@
 
 obj-$(CONFIG_IBM_ASM)		+= ibmasm/
 obj-$(CONFIG_AD525X_DPOT)	+= ad525x_dpot.o
+obj-$(CONFIG_AD525X_DPOT_I2C)	+= ad525x_dpot-i2c.o
+obj-$(CONFIG_AD525X_DPOT_SPI)	+= ad525x_dpot-spi.o
 obj-$(CONFIG_ATMEL_PWM)		+= atmel_pwm.o
 obj-$(CONFIG_ATMEL_SSC)		+= atmel-ssc.o
 obj-$(CONFIG_ATMEL_TCLIB)	+= atmel_tclib.o

trunk/drivers/misc/ad525x_dpot-i2c.c

@@ -0,0 +1,119 @@
+/*
+ * Driver for the Analog Devices digital potentiometers (I2C bus)
+ *
+ * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/i2c.h>
+#include <linux/module.h>
+
+#include "ad525x_dpot.h"
+
+/* ------------------------------------------------------------------------- */
+/* I2C bus functions */
+static int write_d8(void *client, u8 val)
+{
+	return i2c_smbus_write_byte(client, val);
+}
+
+static int write_r8d8(void *client, u8 reg, u8 val)
+{
+	return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+static int write_r8d16(void *client, u8 reg, u16 val)
+{
+	return i2c_smbus_write_word_data(client, reg, val);
+}
+
+static int read_d8(void *client)
+{
+	return i2c_smbus_read_byte(client);
+}
+
+static int read_r8d8(void *client, u8 reg)
+{
+	return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int read_r8d16(void *client, u8 reg)
+{
+	return i2c_smbus_read_word_data(client, reg);
+}
+
+static const struct ad_dpot_bus_ops bops = {
+	.read_d8	= read_d8,
+	.read_r8d8	= read_r8d8,
+	.read_r8d16	= read_r8d16,
+	.write_d8	= write_d8,
+	.write_r8d8	= write_r8d8,
+	.write_r8d16	= write_r8d16,
+};
+
+static int __devinit ad_dpot_i2c_probe(struct i2c_client *client,
+				      const struct i2c_device_id *id)
+{
+	struct ad_dpot_bus_data bdata = {
+		.client = client,
+		.bops = &bops,
+	};
+
+	struct ad_dpot_id dpot_id = {
+		.name = (char *) &id->name,
+		.devid = id->driver_data,
+	};
+
+	if (!i2c_check_functionality(client->adapter,
+				     I2C_FUNC_SMBUS_WORD_DATA)) {
+		dev_err(&client->dev, "SMBUS Word Data not Supported\n");
+		return -EIO;
+	}
+
+	return ad_dpot_probe(&client->dev, &bdata, &dpot_id);
+}
+
+static int __devexit ad_dpot_i2c_remove(struct i2c_client *client)
+{
+	return ad_dpot_remove(&client->dev);
+}
+
+static const struct i2c_device_id ad_dpot_id[] = {
+	{"ad5258", AD5258_ID},
+	{"ad5259", AD5259_ID},
+	{"ad5251", AD5251_ID},
+	{"ad5252", AD5252_ID},
+	{"ad5253", AD5253_ID},
+	{"ad5254", AD5254_ID},
+	{"ad5255", AD5255_ID},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, ad_dpot_id);
+
+static struct i2c_driver ad_dpot_i2c_driver = {
+	.driver = {
+		.name	= "ad_dpot",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= ad_dpot_i2c_probe,
+	.remove		= __devexit_p(ad_dpot_i2c_remove),
+	.id_table	= ad_dpot_id,
+};
+
+static int __init ad_dpot_i2c_init(void)
+{
+	return i2c_add_driver(&ad_dpot_i2c_driver);
+}
+module_init(ad_dpot_i2c_init);
+
+static void __exit ad_dpot_i2c_exit(void)
+{
+	i2c_del_driver(&ad_dpot_i2c_driver);
+}
+module_exit(ad_dpot_i2c_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("digital potentiometer I2C bus driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("i2c:ad_dpot");

trunk/drivers/misc/ad525x_dpot-spi.c

@@ -0,0 +1,172 @@
+/*
+ * Driver for the Analog Devices digital potentiometers (SPI bus)
+ *
+ * Copyright (C) 2010 Michael Hennerich, Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/spi/spi.h>
+#include <linux/module.h>
+
+#include "ad525x_dpot.h"
+
+static const struct ad_dpot_id ad_dpot_spi_devlist[] = {
+	{.name = "ad5160", .devid = AD5160_ID},
+	{.name = "ad5161", .devid = AD5161_ID},
+	{.name = "ad5162", .devid = AD5162_ID},
+	{.name = "ad5165", .devid = AD5165_ID},
+	{.name = "ad5200", .devid = AD5200_ID},
+	{.name = "ad5201", .devid = AD5201_ID},
+	{.name = "ad5203", .devid = AD5203_ID},
+	{.name = "ad5204", .devid = AD5204_ID},
+	{.name = "ad5206", .devid = AD5206_ID},
+	{.name = "ad5207", .devid = AD5207_ID},
+	{.name = "ad5231", .devid = AD5231_ID},
+	{.name = "ad5232", .devid = AD5232_ID},
+	{.name = "ad5233", .devid = AD5233_ID},
+	{.name = "ad5235", .devid = AD5235_ID},
+	{.name = "ad5260", .devid = AD5260_ID},
+	{.name = "ad5262", .devid = AD5262_ID},
+	{.name = "ad5263", .devid = AD5263_ID},
+	{.name = "ad5290", .devid = AD5290_ID},
+	{.name = "ad5291", .devid = AD5291_ID},
+	{.name = "ad5292", .devid = AD5292_ID},
+	{.name = "ad5293", .devid = AD5293_ID},
+	{.name = "ad7376", .devid = AD7376_ID},
+	{.name = "ad8400", .devid = AD8400_ID},
+	{.name = "ad8402", .devid = AD8402_ID},
+	{.name = "ad8403", .devid = AD8403_ID},
+	{.name = "adn2850", .devid = ADN2850_ID},
+	{}
+};
+
+/* ------------------------------------------------------------------------- */
+
+/* SPI bus functions */
+static int write8(void *client, u8 val)
+{
+	u8 data = val;
+	return spi_write(client, &data, 1);
+}
+
+static int write16(void *client, u8 reg, u8 val)
+{
+	u8 data[2] = {reg, val};
+	return spi_write(client, data, 1);
+}
+
+static int write24(void *client, u8 reg, u16 val)
+{
+	u8 data[3] = {reg, val >> 8, val};
+	return spi_write(client, data, 1);
+}
+
+static int read8(void *client)
+{
+	int ret;
+	u8 data;
+	ret = spi_read(client, &data, 1);
+	if (ret < 0)
+		return ret;
+
+	return data;
+}
+
+static int read16(void *client, u8 reg)
+{
+	int ret;
+	u8 buf_rx[2];
+
+	write16(client, reg, 0);
+	ret = spi_read(client, buf_rx, 2);
+	if (ret < 0)
+		return ret;
+
+	return (buf_rx[0] << 8) |  buf_rx[1];
+}
+
+static int read24(void *client, u8 reg)
+{
+	int ret;
+	u8 buf_rx[3];
+
+	write24(client, reg, 0);
+	ret = spi_read(client, buf_rx, 3);
+	if (ret < 0)
+		return ret;
+
+	return (buf_rx[1] << 8) |  buf_rx[2];
+}
+
+static const struct ad_dpot_bus_ops bops = {
+	.read_d8	= read8,
+	.read_r8d8	= read16,
+	.read_r8d16	= read24,
+	.write_d8	= write8,
+	.write_r8d8	= write16,
+	.write_r8d16	= write24,
+};
+
+static const struct ad_dpot_id *dpot_match_id(const struct ad_dpot_id *id,
+						char *name)
+{
+	while (id->name && id->name[0]) {
+		if (strcmp(name, id->name) == 0)
+			return id;
+		id++;
+	}
+	return NULL;
+}
+
+static int __devinit ad_dpot_spi_probe(struct spi_device *spi)
+{
+	char *name = spi->dev.platform_data;
+	const struct ad_dpot_id *dpot_id;
+
+	struct ad_dpot_bus_data bdata = {
+		.client = spi,
+		.bops = &bops,
+	};
+
+	dpot_id = dpot_match_id(ad_dpot_spi_devlist, name);
+
+	if (dpot_id == NULL) {
+		dev_err(&spi->dev, "%s not in supported device list", name);
+		return -ENODEV;
+	}
+
+	return ad_dpot_probe(&spi->dev, &bdata, dpot_id);
+}
+
+static int __devexit ad_dpot_spi_remove(struct spi_device *spi)
+{
+	return ad_dpot_remove(&spi->dev);
+}
+
+static struct spi_driver ad_dpot_spi_driver = {
+	.driver = {
+		.name	= "ad_dpot",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= ad_dpot_spi_probe,
+	.remove		= __devexit_p(ad_dpot_spi_remove),
+};
+
+static int __init ad_dpot_spi_init(void)
+{
+	return spi_register_driver(&ad_dpot_spi_driver);
+}
+module_init(ad_dpot_spi_init);
+
+static void __exit ad_dpot_spi_exit(void)
+{
+	spi_unregister_driver(&ad_dpot_spi_driver);
+}
+module_exit(ad_dpot_spi_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("digital potentiometer SPI bus driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("spi:ad_dpot");