iio:adc:mcp3911: Switch to generic firmware properties.

This allows use of the driver with other types of firmware such as ACPI
PRP0001 based probing.

Also part of a general attempt to remove direct use of of_ specific
accessors from IIO.

Added an include for mod_devicetable.h whilst here to cover the
struct of_device_id definition.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Kent Gustavsson <kent@minoris.se>
Reviewed-by: Marcus Folkesson <marcus.folkesson@gmail.com>

diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c
index e573da5..13535f1 100644 (file)
--- a/drivers/iio/adc/mcp3911.c
+++ b/drivers/iio/adc/mcp3911.c
@@ -10,6 +10,8 @@
 #include <linux/err.h>
 #include <linux/iio/iio.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/property.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 
@@ -200,12 +202,13 @@ static const struct iio_info mcp3911_info = {
        .write_raw = mcp3911_write_raw,
 };
 
-static int mcp3911_config(struct mcp3911 *adc, struct device_node *of_node)
+static int mcp3911_config(struct mcp3911 *adc)
 {
+       struct device *dev = &adc->spi->dev;
        u32 configreg;
        int ret;
 
-       of_property_read_u32(of_node, "device-addr", &adc->dev_addr);
+       device_property_read_u32(dev, "device-addr", &adc->dev_addr);
        if (adc->dev_addr > 3) {
                dev_err(&adc->spi->dev,
                        "invalid device address (%i). Must be in range 0-3.\n",
@@ -289,7 +292,7 @@ static int mcp3911_probe(struct spi_device *spi)
                }
        }
 
-       ret = mcp3911_config(adc, spi->dev.of_node);
+       ret = mcp3911_config(adc);
        if (ret)
                goto clk_disable;