From: Guennadi Liakhovetski g.liakhovet...@gmx.de
Add a V4L2 OF parser, implementing bindings, documented in
Documentation/devicetree/bindings/media/video-interfaces.txt.
Signed-off-by: Guennadi Liakhovetski g.liakhovet...@gmx.de
Signed-off-by: Sylwester Nawrocki s.nawro...@samsung.com
---
Changes since previous version:
- merged into this one all my fixup patches from this series [1]:
v4l2-of: Support variable length of data-lanes property
v4l2-of: Add v4l2_of_parse_data_lanes() function
v4l2-of: Corrected v4l2_of_parse_link() function declaration
v4l2_of_parse_link() return value type is int, not void.
v4l2-of: Replace remote property with remote-endpoint
[1] https://lkml.org/lkml/2012/12/10/464
---
drivers/media/v4l2-core/Makefile |3 +
drivers/media/v4l2-core/v4l2-of.c | 249 +
include/media/v4l2-of.h | 79
3 files changed, 331 insertions(+)
create mode 100644 drivers/media/v4l2-core/v4l2-of.c
create mode 100644 include/media/v4l2-of.h
diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile
index c2d61d4..00f64d6 100644
--- a/drivers/media/v4l2-core/Makefile
+++ b/drivers/media/v4l2-core/Makefile
@@ -9,6 +9,9 @@ videodev-objs := v4l2-dev.o v4l2-ioctl.o v4l2-device.o
v4l2-fh.o \
ifeq ($(CONFIG_COMPAT),y)
videodev-objs += v4l2-compat-ioctl32.o
endif
+ifeq ($(CONFIG_OF),y)
+ videodev-objs += v4l2-of.o
+endif
obj-$(CONFIG_VIDEO_DEV) += videodev.o v4l2-int-device.o
obj-$(CONFIG_VIDEO_V4L2) += v4l2-common.o
diff --git a/drivers/media/v4l2-core/v4l2-of.c
b/drivers/media/v4l2-core/v4l2-of.c
new file mode 100644
index 000..cdac04b
--- /dev/null
+++ b/drivers/media/v4l2-core/v4l2-of.c
@@ -0,0 +1,249 @@
+/*
+ * V4L2 OF binding parsing library
+ *
+ * Copyright (C) 2012 Renesas Electronics Corp.
+ * Author: Guennadi Liakhovetski g.liakhovet...@gmx.de
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ */
+#include linux/kernel.h
+#include linux/module.h
+#include linux/of.h
+#include linux/slab.h
+#include linux/types.h
+
+#include media/v4l2-of.h
+
+/**
+ * v4l2_of_parse_mipi_csi2() - parse MIPI CSI-2 bus properties
+ * @node: pointer to endpoint device_node
+ * @endpoint: pointer to v4l2_of_endpoint data structure
+ *
+ * Return: 0 on success or negative error value otherwise.
+ */
+int v4l2_of_parse_mipi_csi2(const struct device_node *node,
+ struct v4l2_of_endpoint *endpoint)
+{
+ struct v4l2_of_mipi_csi2 *mipi_csi2 = endpoint-mipi_csi_2;
+ u32 data_lanes[ARRAY_SIZE(mipi_csi2-data_lanes)];
+ struct property *prop;
+ const __be32 *lane = NULL;
+ u32 v;
+ int i = 0;
+
+ prop = of_find_property(node, data-lanes, NULL);
+ if (!prop)
+ return -EINVAL;
+ do {
+ lane = of_prop_next_u32(prop, lane, data_lanes[i]);
+ } while (lane i++ ARRAY_SIZE(data_lanes));
+
+ mipi_csi2-num_data_lanes = i;
+ while (i--)
+ mipi_csi2-data_lanes[i] = data_lanes[i];
+
+ if (!of_property_read_u32(node, clock-lanes, v))
+ mipi_csi2-clock_lane = v;
+
+ if (of_get_property(node, clock-noncontinuous, v))
+ endpoint-mbus_flags |= V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK;
+
+ return 0;
+}
+
+/**
+ * v4l2_of_parse_parallel_bus() - parse parallel bus properties
+ * @node: pointer to endpoint device_node
+ * @endpoint: pointer to v4l2_of_endpoint data structure
+ */
+void v4l2_of_parse_parallel_bus(const struct device_node *node,
+ struct v4l2_of_endpoint *endpoint)
+{
+ unsigned int flags = 0;
+ u32 v;
+
+ if (WARN_ON(!endpoint))
+ return;
+
+ if (!of_property_read_u32(node, hsync-active, v))
+ flags |= v ? V4L2_MBUS_HSYNC_ACTIVE_HIGH :
+ V4L2_MBUS_HSYNC_ACTIVE_LOW;
+
+ if (!of_property_read_u32(node, vsync-active, v))
+ flags |= v ? V4L2_MBUS_VSYNC_ACTIVE_HIGH :
+ V4L2_MBUS_VSYNC_ACTIVE_LOW;
+
+ if (!of_property_read_u32(node, pclk-sample, v))
+ flags |= v ? V4L2_MBUS_PCLK_SAMPLE_RISING :
+ V4L2_MBUS_PCLK_SAMPLE_FALLING;
+
+ if (!of_property_read_u32(node, field-even-active, v))
+ flags |= v ? V4L2_MBUS_FIELD_EVEN_HIGH :
+ V4L2_MBUS_FIELD_EVEN_LOW;
+ if (flags)
+ endpoint-mbus_type = V4L2_MBUS_PARALLEL;
+ else
+ endpoint-mbus_type = V4L2_MBUS_BT656;
+
+ if (!of_property_read_u32(node, data-active, v))
+ flags |= v ? V4L2_MBUS_DATA_ACTIVE_HIGH :
+ V4L2_MBUS_DATA_ACTIVE_LOW;
+
+ if (of_get_property(node, slave-mode, v))
+ flags |= V4L2_MBUS_SLAVE;
+
+ if
