From: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
Implement support for initialization of the lm3533 als driver from
Device Tree.
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxx>
---
Note that this patch can be merged independently of the other patches in the
series, pending approval of the DT binding.
Changes since v4:
- None
Changes since v3:
- Moved als DT parsing from mfd driver
- Gave driver its own compatible
drivers/iio/light/lm3533-als.c | 40 +++++++++++++++++++++++++++++++++++++++-
1 file changed, 39 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
index f409c2047c05..eef9f06eb0b1 100644
--- a/drivers/iio/light/lm3533-als.c
+++ b/drivers/iio/light/lm3533-als.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
@@ -831,6 +832,32 @@ static const struct iio_info lm3533_als_info = {
.read_raw = &lm3533_als_read_raw,
};
+static struct lm3533_als_platform_data *lm3533_als_of_parse(struct device *dev)
+{
+ struct lm3533_als_platform_data *als_pdata;
+ struct device_node *node = dev->of_node;
+ int ret;
+ u32 val;
+
+ als_pdata = devm_kzalloc(dev, sizeof(*als_pdata), GFP_KERNEL);
+ if (!als_pdata)
+ return NULL;
+
+ als_pdata->pwm_mode = of_property_read_bool(node, "ti,pwm-mode");
+
+ ret = of_property_read_u32(node, "ti,als-resistance-ohm", &val);
+ if (ret < 0 && ret != -EINVAL) {
+ dev_err(dev, "unable to read ti,als-resistance-ohm");
+ return NULL;
+ }
+
+ /* Leave at high-Z, if the property was omitted or specified as 0 */
+ if (!ret && val != 0)
+ als_pdata->r_select = 200000 / val;
+
+ return als_pdata;
+}
+
static int lm3533_als_probe(struct platform_device *pdev)
{
struct lm3533 *lm3533;
@@ -843,7 +870,11 @@ static int lm3533_als_probe(struct platform_device *pdev)
if (!lm3533)
return -EINVAL;
- pdata = pdev->dev.platform_data;
+ if (pdev->dev.of_node)
+ pdata = lm3533_als_of_parse(&pdev->dev);
+ else
+ pdata = pdev->dev.platform_data;
+
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
@@ -914,9 +945,16 @@ static int lm3533_als_remove(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id lm3533_als_of_match[] = {
+ { .compatible = "ti,lm3533-als", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, lm3533_als_of_match);
+
static struct platform_driver lm3533_als_driver = {
.driver = {
.name = "lm3533-als",
+ .of_match_table = lm3533_als_of_match,
},
.probe = lm3533_als_probe,
.remove = lm3533_als_remove,
--
2.11.0
--
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