Devicetree can provide platform data
Signed-off-by: Sean Nyekjaer <sean.nyekjaer@xxxxxxxxx>
---
Changes since v1:
- this patch added
I'm adding dt bindings header file with the same info as, the platform data as
the devicetree can't understand enums.
Please give an idea to work around this :-)
drivers/iio/dac/ad5755.c | 87 +++++++++++++++++++++++++++++++++++-
include/dt-bindings/iio/adi,ad5755.h | 66 +++++++++++++++++++++++++++
2 files changed, 152 insertions(+), 1 deletion(-)
create mode 100644 include/dt-bindings/iio/adi,ad5755.h
diff --git a/drivers/iio/dac/ad5755.c b/drivers/iio/dac/ad5755.c
index e1b6e78..c1e2546 100644
--- a/drivers/iio/dac/ad5755.c
+++ b/drivers/iio/dac/ad5755.c
@@ -14,9 +14,11 @@
#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>
+#include <dt-bindings/iio/adi,ad5755.h>
#define AD5755_NUM_CHANNELS 4
@@ -556,6 +558,82 @@ 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 +661,15 @@ 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)
diff --git a/include/dt-bindings/iio/adi,ad5755.h b/include/dt-bindings/iio/adi,ad5755.h
new file mode 100644
index 0000000..117466b
--- /dev/null
+++ b/include/dt-bindings/iio/adi,ad5755.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _DT_BINDINGS_AD5755_H
+#define _DT_BINDINGS_AD5755_H
+
+#define AD5755_MODE_VOLTAGE_0V_5V 0
+#define AD5755_MODE_VOLTAGE_0V_10V 1
+#define AD5755_MODE_VOLTAGE_PLUSMINUS_5V 2
+#define AD5755_MODE_VOLTAGE_PLUSMINUS_10V 3
+#define AD5755_MODE_CURRENT_4mA_20mA 4
+#define AD5755_MODE_CURRENT_0mA_20mA 5
+#define AD5755_MODE_CURRENT_0mA_24mA 6
+
+#define AD5755_DC_DC_PHASE_ALL_SAME_EDGE 0
+#define AD5755_DC_DC_PHASE_A_B_SAME_EDGE_C_D_OPP_EDGE 1
+#define AD5755_DC_DC_PHASE_A_C_SAME_EDGE_B_D_OPP_EDGE 2
+#define AD5755_DC_DC_PHASE_90_DEGREE 3
+
+#define AD5755_DC_DC_FREQ_250kHZ 0
+#define AD5755_DC_DC_FREQ_410kHZ 1
+#define AD5755_DC_DC_FREQ_650kHZ 2
+
+#define AD5755_DC_DC_MAXV_23V 0
+#define AD5755_DC_DC_MAXV_24V5 1
+#define AD5755_DC_DC_MAXV_27V 2
+#define AD5755_DC_DC_MAXV_29V5 3
+
+#define AD5755_SLEW_RATE_64k 0
+#define AD5755_SLEW_RATE_32k 1
+#define AD5755_SLEW_RATE_16k 2
+#define AD5755_SLEW_RATE_8k 3
+#define AD5755_SLEW_RATE_4k 4
+#define AD5755_SLEW_RATE_2k 5
+#define AD5755_SLEW_RATE_1k 6
+#define AD5755_SLEW_RATE_500 7
+#define AD5755_SLEW_RATE_250 8
+#define AD5755_SLEW_RATE_125 9
+#define AD5755_SLEW_RATE_64 10
+#define AD5755_SLEW_RATE_32 11
+#define AD5755_SLEW_RATE_16 12
+#define AD5755_SLEW_RATE_8 13
+#define AD5755_SLEW_RATE_4 14
+#define AD5755_SLEW_RATE_0_5 15
+
+#define AD5755_SLEW_STEP_SIZE_1 0
+#define AD5755_SLEW_STEP_SIZE_2 1
+#define AD5755_SLEW_STEP_SIZE_4 2
+#define AD5755_SLEW_STEP_SIZE_8 3
+#define AD5755_SLEW_STEP_SIZE_16 4
+#define AD5755_SLEW_STEP_SIZE_32 5
+#define AD5755_SLEW_STEP_SIZE_64 6
+#define AD5755_SLEW_STEP_SIZE_128 7
+#define AD5755_SLEW_STEP_SIZE_256 8
+
+#endif /* _DT_BINDINGS_AD5755_H */
--
2.7.0
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