Devicetree can provide platform data
Signed-off-by: Sean Nyekjaer <sean.nyekjaer@xxxxxxxxx>
---
Changes since v2:
- removed defines from DT
Still missing check of the valid from DT is valid.
drivers/iio/dac/ad5755.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 85 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c
index e1b6e78..8d264f0 100644
--- a/drivers/iio/dac/ad5755.c
+++ b/drivers/iio/dac/ad5755.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/delay.h>
+#include <linux/of.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/platform_data/ad5755.h>
@@ -556,6 +557,82 @@ static const struct ad5755_platform_data ad5755_default_pdata = {
},
};
+#ifdef CONFIG_OF
+static struct ad5755_platform_data *ad5755_parse_dt(struct device *dev)
+{
+ struct device_node *np = dev->of_node;
+ struct device_node *pp;
+ struct ad5755_platform_data *pdata;
+ unsigned int tmp;
+ unsigned int tmparray[3];
+ int devnr;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ pdata->ext_dc_dc_compenstation_resistor =
+ of_property_read_bool(np, "adi,ext_dc_dc_compenstation_resistor");
+
+ if (!of_property_read_u32(np, "adi,dc_dc_phase", &tmp))
+ pdata->dc_dc_phase = tmp;
+ else
+ pdata->dc_dc_phase = AD5755_DC_DC_PHASE_ALL_SAME_EDGE;
+
+ if (!of_property_read_u32(np, "adi,dc_dc_freq", &tmp))
+ pdata->dc_dc_freq = tmp;
+ else
+ pdata->dc_dc_freq = AD5755_DC_DC_FREQ_410kHZ;
+
+ if (!of_property_read_u32(np, "adi,dc_dc_maxv", &tmp))
+ pdata->dc_dc_maxv = tmp;
+ else
+ pdata->dc_dc_maxv = AD5755_DC_DC_MAXV_23V;
+
+ devnr = 0;
+ for_each_child_of_node(np, pp) {
+ if (devnr > AD5755_NUM_CHANNELS) {
+ dev_err(dev, "There is to many channels defined in DT\n");
+ goto error_out;
+ }
+
+ if (!of_property_read_u32(pp, "adi,mode", &tmp))
+ pdata->dac[devnr].mode = tmp;
+ else
+ pdata->dac[devnr].mode = AD5755_MODE_CURRENT_4mA_20mA;
+
+ pdata->dac[devnr].ext_current_sense_resistor =
+ of_property_read_bool(pp, "adi,ext_current_sense_resistor");
+
+ pdata->dac[devnr].enable_voltage_overrange =
+ of_property_read_bool(pp, "adi,enable_voltage_overrange");
+ if (!of_property_read_u32_array(pp, "adi,slew", tmparray, 3)) {
+ pdata->dac[devnr].slew.enable = tmparray[0];
+ pdata->dac[devnr].slew.rate = tmparray[1];
+ pdata->dac[devnr].slew.step_size = tmparray[2];
+ } else {
+ pdata->dac[devnr].slew.enable = false;
+ pdata->dac[devnr].slew.rate = AD5755_SLEW_RATE_64k;
+ pdata->dac[devnr].slew.step_size = AD5755_SLEW_STEP_SIZE_1;
+ }
+
+ devnr++;
+ }
+
+ return pdata;
+
+error_out:
+ devm_kfree(dev, pdata);
+ return NULL;
+}
+#else
+static
+struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
static int ad5755_probe(struct spi_device *spi)
{
enum ad5755_type type = spi_get_device_id(spi)->driver_data;
@@ -583,8 +660,15 @@ static int ad5755_probe(struct spi_device *spi)
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->num_channels = AD5755_NUM_CHANNELS;
- if (!pdata)
+ if (spi->dev.of_node)
+ pdata = ad5755_parse_dt(&spi->dev);
+ else
+ pdata = spi->dev.platform_data;
+
+ if (!pdata) {
+ dev_warn(&spi->dev, "no platform data? using default\n");
pdata = &ad5755_default_pdata;
+ }
ret = ad5755_init_channels(indio_dev, pdata);
if (ret)
--
2.7.1
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