[PATCH] video: simplefb: modernise DT parsing

[Caleb Connolly]

simplefb was using old style FDT parsing which doesn't behave well in
combination with livetree. Update it to use ofnode instead and add a
missing null check for the "format" property.

Standardise the error logging while we're here.

Fixes: 971d7e64245d ("video: simplefb")
Signed-off-by: Caleb Connolly <caleb.conno...@linaro.org>
---
 drivers/video/simplefb.c | 32 ++++++++++++++++++++------------
 1 file changed, 20 insertions(+), 12 deletions(-)

diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c
index 235ec761f70b..3d83bf8f2e88 100644
--- a/drivers/video/simplefb.c
+++ b/drivers/video/simplefb.c
@@ -15,14 +15,14 @@ static int simple_video_probe(struct udevice *dev)
 {
        struct video_uc_plat *plat = dev_get_uclass_plat(dev);
        struct video_priv *uc_priv = dev_get_uclass_priv(dev);
-       const void *blob = gd->fdt_blob;
-       const int node = dev_of_offset(dev);
+       ofnode node = dev_ofnode(dev);
        const char *format;
+       int ret;
        fdt_addr_t base;
        fdt_size_t size;
+       u32 width, height, rot;
 
-       base = fdtdec_get_addr_size_auto_parent(blob, 
dev_of_offset(dev->parent),
-                       node, "reg", 0, &size, false);
+       base = dev_read_addr_size(dev, &size);
        if (base == FDT_ADDR_T_NONE) {
                debug("%s: Failed to decode memory region\n", __func__);
                return -EINVAL;
@@ -41,17 +41,25 @@ static int simple_video_probe(struct udevice *dev)
 
        debug("%s: Query resolution...\n", __func__);
 
-       uc_priv->xsize = fdtdec_get_uint(blob, node, "width", 0);
-       uc_priv->ysize = fdtdec_get_uint(blob, node, "height", 0);
-       uc_priv->rot = fdtdec_get_uint(blob, node, "rot", 0);
-       if (uc_priv->rot > 3) {
-               log_debug("%s: invalid rot\n", __func__);
-               return log_msg_ret("rot", -EINVAL);
+       ret = ofnode_read_u32(node, "width", &width);
+       ret = ret ?: ofnode_read_u32(node, "height", &height);
+       if (ret || !width || !height) {
+               log_err("%s: invalid width or height: %d\n", __func__, ret);
+               return ret;
        }
+       ofnode_read_u32(node, "rot", &rot);
+       uc_priv->rot = rot;
+       uc_priv->xsize = width;
+       uc_priv->ysize = height;
 
-       format = fdt_getprop(blob, node, "format", NULL);
+       format = ofnode_read_string(node, "format");
        debug("%s: %dx%d@%s\n", __func__, uc_priv->xsize, uc_priv->ysize, 
format);
 
+       if (!format) {
+               log_err("%s: please add required property \"format\"\n", 
__func__);
+               return -EINVAL;
+       }
+
        if (strcmp(format, "r5g6b5") == 0) {
                uc_priv->bpix = VIDEO_BPP16;
        } else if (strcmp(format, "a8b8g8r8") == 0 ||
@@ -67,7 +75,7 @@ static int simple_video_probe(struct udevice *dev)
                uc_priv->bpix = VIDEO_BPP32;
                uc_priv->format = VIDEO_X2R10G10B10;
        } else {
-               printf("%s: invalid format: %s\n", __func__, format);
+               log_err("%s: invalid format: %s\n", __func__, format);
                return -EINVAL;
        }
 
-- 
2.43.1