linux-kernel - [PATCH v2 3/8] media: i2c: ds90ub913: Use v4l2_fwnode_endpoint

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Message-Id: <20230720-fpdlink-additions-v2-3-b91b1eca2ad3@ideasonboard.com>
Date:   Thu, 20 Jul 2023 13:30:34 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Luca Ceresoli <luca.ceresoli@...tlin.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil@...all.nl>,
        Satish Nagireddy <satish.nagireddy@...cruise.com>,
        Matti Vaittinen <mazziesaccount@...il.com>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: [PATCH v2 3/8] media: i2c: ds90ub913: Use
 v4l2_fwnode_endpoint_parse()

Use v4l2_fwnode_endpoint_parse() to parse the sink endpoint parameters.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
---
 drivers/media/i2c/ds90ub913.c | 32 ++++++++++++++++++++------------
 1 file changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/media/i2c/ds90ub913.c b/drivers/media/i2c/ds90ub913.c
index 4dae5afa9fa9..cb53b0654a43 100644
--- a/drivers/media/i2c/ds90ub913.c
+++ b/drivers/media/i2c/ds90ub913.c
@@ -21,6 +21,8 @@
 #include <linux/regmap.h>
 
 #include <media/i2c/ds90ub9xx.h>
+#include <media/v4l2-fwnode.h>
+#include <media/v4l2-mediabus.h>
 #include <media/v4l2-subdev.h>
 
 #define UB913_PAD_SINK			0
@@ -83,7 +85,7 @@ struct ub913_data {
 
 	struct ds90ub9xx_platform_data *plat_data;
 
-	u32			pclk_polarity;
+	u32			pclk_polarity_rising;
 };
 
 static inline struct ub913_data *sd_to_ub913(struct v4l2_subdev *sd)
@@ -675,25 +677,31 @@ static int ub913_add_i2c_adapter(struct ub913_data *priv)
 static int ub913_parse_dt(struct ub913_data *priv)
 {
 	struct device *dev = &priv->client->dev;
+	struct v4l2_fwnode_endpoint vep = {};
 	struct fwnode_handle *ep_fwnode;
 	int ret;
 
 	ep_fwnode = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev),
 						    UB913_PAD_SINK, 0, 0);
-	if (!ep_fwnode) {
-		dev_err_probe(dev, -ENOENT, "No sink endpoint\n");
-		return -ENOENT;
-	}
+	if (!ep_fwnode)
+		return dev_err_probe(dev, -ENOENT, "No sink endpoint\n");
 
-	ret = fwnode_property_read_u32(ep_fwnode, "pclk-sample",
-				       &priv->pclk_polarity);
+	vep.bus_type = V4L2_MBUS_PARALLEL;
+	ret = v4l2_fwnode_endpoint_parse(ep_fwnode, &vep);
 
 	fwnode_handle_put(ep_fwnode);
 
-	if (ret) {
-		dev_err_probe(dev, ret, "failed to parse 'pclk-sample'\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "failed to parse sink endpoint data\n");
+
+	if (vep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
+		priv->pclk_polarity_rising = true;
+	else if (vep.bus.parallel.flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+		priv->pclk_polarity_rising = false;
+	else
+		return dev_err_probe(dev, -EINVAL,
+				     "bad value for 'pclk-sample'\n");
 
 	return 0;
 }
@@ -726,7 +734,7 @@ static int ub913_hw_init(struct ub913_data *priv)
 
 	ub913_read(priv, UB913_REG_GENERAL_CFG, &v);
 	v &= ~UB913_REG_GENERAL_CFG_PCLK_RISING;
-	v |= priv->pclk_polarity ? UB913_REG_GENERAL_CFG_PCLK_RISING : 0;
+	v |= priv->pclk_polarity_rising ? UB913_REG_GENERAL_CFG_PCLK_RISING : 0;
 	ub913_write(priv, UB913_REG_GENERAL_CFG, v);
 
 	return 0;

-- 
2.34.1