From d4f495a881476b557394607665a4deda7158b8c7 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Mon, 17 Nov 2014 15:29:11 +0100
Subject: [PATCH] fdt_support: Add a fdt_setup_simplefb_node helper function
Add a generic helper to fill and enable simplefb nodes.
The first user of this will be the sunxi display code.
lcd_dt_simplefb_configure_node is also a good candidate to be converted
to use this, but that requires someone to run some tests first, as
lcd_dt_simplefb_configure_node does not honor #address-cells and #size-cells,
but simply assumes 1 and 1 for both.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Simon Glass <sjg@chromium.org>
---
common/fdt_support.c | 62 +++++++++++++++++++++++++++++++++++++++++++
include/fdt_support.h | 3 +++
2 files changed, 65 insertions(+)
diff --git a/common/fdt_support.c b/common/fdt_support.c
index 2d3c3870b1..2a20147286 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -1524,3 +1524,65 @@ int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
return 0;
}
+
+/**
+ * fdt_setup_simplefb_node - Fill and enable a simplefb node
+ *
+ * @fdt: ptr to device tree
+ * @node: offset of the simplefb node
+ * @base_address: framebuffer base address
+ * @width: width in pixels
+ * @height: height in pixels
+ * @stride: bytes per line
+ * @format: pixel format string
+ *
+ * Convenience function to fill and enable a simplefb node.
+ */
+int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
+ u32 height, u32 stride, const char *format)
+{
+ char name[32];
+ fdt32_t cells[4];
+ int i, addrc, sizec, ret;
+
+ of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
+ &addrc, &sizec);
+ i = 0;
+ if (addrc == 2)
+ cells[i++] = cpu_to_fdt32(base_address >> 32);
+ cells[i++] = cpu_to_fdt32(base_address);
+ if (sizec == 2)
+ cells[i++] = 0;
+ cells[i++] = cpu_to_fdt32(height * stride);
+
+ ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
+ if (ret < 0)
+ return ret;
+
+ snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
+ ret = fdt_set_name(fdt, node, name);
+ if (ret < 0)
+ return ret;
+
+ ret = fdt_setprop_u32(fdt, node, "width", width);
+ if (ret < 0)
+ return ret;
+
+ ret = fdt_setprop_u32(fdt, node, "height", height);
+ if (ret < 0)
+ return ret;
+
+ ret = fdt_setprop_u32(fdt, node, "stride", stride);
+ if (ret < 0)
+ return ret;
+
+ ret = fdt_setprop_string(fdt, node, "format", format);
+ if (ret < 0)
+ return ret;
+
+ ret = fdt_setprop_string(fdt, node, "status", "okay");
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
diff --git a/include/fdt_support.h b/include/fdt_support.h
index 55cef94358..d5e09e658c 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -147,6 +147,9 @@ void of_bus_default_count_cells(void *blob, int parentoffset,
int ft_verify_fdt(void *fdt);
int arch_fixup_memory_node(void *blob);
+int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
+ u32 height, u32 stride, const char *format);
+
#endif /* ifdef CONFIG_OF_LIBFDT */
#ifdef USE_HOSTCC
--
2.39.5