From: "Patil, Rachna" <rachna@xxxxxx>
Add DT support for client ADC driver.
[ panto@xxxxxxxxxxxxxxxxxxxxxxx : use of_get_child_by_name
instead of of_find_node_by_name ]
Signed-off-by: Pantelis Antoniou <panto@xxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Patil, Rachna <rachna@xxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
[bigeasy: shift the code to the left]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
drivers/iio/adc/ti_am335x_adc.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 5f9a7e7..e657709 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -22,6 +22,8 @@
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/iio/iio.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/mfd/ti_am335x_tscadc.h>
#include <linux/platform_data/ti_am335x_adc.h>
@@ -141,11 +143,12 @@ static int tiadc_probe(struct platform_device *pdev)
struct iio_dev *indio_dev;
struct tiadc_device *adc_dev;
struct ti_tscadc_dev *tscadc_dev = pdev->dev.platform_data;
- struct mfd_tscadc_board *pdata;
+ struct mfd_tscadc_board *pdata = tscadc_dev->dev->platform_data;
+ struct device_node *node = tscadc_dev->dev->of_node;
int err;
+ u32 val32;
- pdata = tscadc_dev->dev->platform_data;
- if (!pdata || !pdata->adc_init) {
+ if (!pdata && !node) {
dev_err(&pdev->dev, "Could not find platform data\n");
return -EINVAL;
}
@@ -159,7 +162,19 @@ static int tiadc_probe(struct platform_device *pdev)
adc_dev = iio_priv(indio_dev);
adc_dev->mfd_tscadc = tscadc_dev;
- adc_dev->channels = pdata->adc_init->adc_channels;
+
+ if (pdata)
+ adc_dev->channels = pdata->adc_init->adc_channels;
+ else {
+ node = of_get_child_by_name(node, "adc");
+ if (!node)
+ return -EINVAL;
+ err = of_property_read_u32(node,
+ "ti,adc-channels", &val32);
+ if (err < 0)
+ goto err_free_device;
+ adc_dev->channels = val32;
+ }
indio_dev->dev.parent = &pdev->dev;
indio_dev->name = dev_name(&pdev->dev);
--
1.7.10.4
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