iio: potentiometer: mcp4531: Add device tree binding

This patch adds the necessary device tree binding to allow DT probing of
currently supported parts.

Signed-off-by: Florian Vaussard <florian.vaussard@heig-vd.ch>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/potentiometer/mcp4531.c b/drivers/iio/potentiometer/mcp4531.c
index 2251173153c113481f3c94a6f0e2c40f3d9af134..13b6ae2fcf7b2cda84553ec95372cfc38020fcfc 100644 (file)
--- a/drivers/iio/potentiometer/mcp4531.c
+++ b/drivers/iio/potentiometer/mcp4531.c
@@ -31,6 +31,8 @@
 #include <linux/module.h>
 #include <linux/i2c.h>
 #include <linux/err.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include <linux/iio/iio.h>
 
@@ -188,12 +190,89 @@ static const struct iio_info mcp4531_info = {
        .driver_module = THIS_MODULE,
 };
 
+#ifdef CONFIG_OF
+
+#define MCP4531_COMPATIBLE(of_compatible, cfg) {       \
+                       .compatible = of_compatible,    \
+                       .data = &mcp4531_cfg[cfg],      \
+}
+
+static const struct of_device_id mcp4531_of_match[] = {
+       MCP4531_COMPATIBLE("microchip,mcp4531-502", MCP453x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4531-103", MCP453x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4531-503", MCP453x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4531-104", MCP453x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4532-502", MCP453x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4532-103", MCP453x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4532-503", MCP453x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4532-104", MCP453x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4541-502", MCP454x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4541-103", MCP454x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4541-503", MCP454x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4541-104", MCP454x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4542-502", MCP454x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4542-103", MCP454x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4542-503", MCP454x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4542-104", MCP454x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4551-502", MCP455x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4551-103", MCP455x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4551-503", MCP455x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4551-104", MCP455x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4552-502", MCP455x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4552-103", MCP455x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4552-503", MCP455x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4552-104", MCP455x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4561-502", MCP456x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4561-103", MCP456x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4561-503", MCP456x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4561-104", MCP456x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4562-502", MCP456x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4562-103", MCP456x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4562-503", MCP456x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4562-104", MCP456x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4631-502", MCP463x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4631-103", MCP463x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4631-503", MCP463x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4631-104", MCP463x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4632-502", MCP463x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4632-103", MCP463x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4632-503", MCP463x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4632-104", MCP463x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4641-502", MCP464x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4641-103", MCP464x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4641-503", MCP464x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4641-104", MCP464x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4642-502", MCP464x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4642-103", MCP464x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4642-503", MCP464x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4642-104", MCP464x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4651-502", MCP465x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4651-103", MCP465x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4651-503", MCP465x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4651-104", MCP465x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4652-502", MCP465x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4652-103", MCP465x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4652-503", MCP465x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4652-104", MCP465x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4661-502", MCP466x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4661-103", MCP466x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4661-503", MCP466x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4661-104", MCP466x_104),
+       MCP4531_COMPATIBLE("microchip,mcp4662-502", MCP466x_502),
+       MCP4531_COMPATIBLE("microchip,mcp4662-103", MCP466x_103),
+       MCP4531_COMPATIBLE("microchip,mcp4662-503", MCP466x_503),
+       MCP4531_COMPATIBLE("microchip,mcp4662-104", MCP466x_104),
+       { /* sentinel */ }
+};
+#endif
+
 static int mcp4531_probe(struct i2c_client *client,
                         const struct i2c_device_id *id)
 {
        struct device *dev = &client->dev;
        struct mcp4531_data *data;
        struct iio_dev *indio_dev;
+       const struct of_device_id *match;
 
        if (!i2c_check_functionality(client->adapter,
                                     I2C_FUNC_SMBUS_WORD_DATA)) {
@@ -207,7 +286,12 @@ static int mcp4531_probe(struct i2c_client *client,
        data = iio_priv(indio_dev);
        i2c_set_clientdata(client, indio_dev);
        data->client = client;
-       data->cfg = &mcp4531_cfg[id->driver_data];
+
+       match = of_match_device(of_match_ptr(mcp4531_of_match), dev);
+       if (match)
+               data->cfg = of_device_get_match_data(dev);
+       else
+               data->cfg = &mcp4531_cfg[id->driver_data];
 
        indio_dev->dev.parent = dev;
        indio_dev->info = &mcp4531_info;
@@ -290,6 +374,7 @@ MODULE_DEVICE_TABLE(i2c, mcp4531_id);
 static struct i2c_driver mcp4531_driver = {
        .driver = {
                .name   = "mcp4531",
+               .of_match_table = of_match_ptr(mcp4531_of_match),
        },
        .probe          = mcp4531_probe,
        .id_table       = mcp4531_id,