layerscape: add ls2088ardb device support

[openwrt/staging/yousong.git] / target / linux / layerscape / patches-4.4 / 1239-mtd-extend-physmap_of-to-let-the-device-tree-specify.patch

diff --git a/target/linux/layerscape/patches-4.4/1239-mtd-extend-physmap_of-to-let-the-device-tree-specify.patch b/target/linux/layerscape/patches-4.4/1239-mtd-extend-physmap_of-to-let-the-device-tree-specify.patch
new file mode 100644 (file)
index 0000000..8254490
--- /dev/null
+++ b/target/linux/layerscape/patches-4.4/1239-mtd-extend-physmap_of-to-let-the-device-tree-specify.patch
@@ -0,0 +1,90 @@
+From 6b54054c4053215fe4add195c67daca9a466ba92 Mon Sep 17 00:00:00 2001
+From: "ying.zhang" <ying.zhang22455@nxp.com>
+Date: Fri, 23 Dec 2016 22:21:22 +0800
+Subject: [PATCH] mtd: extend physmap_of to let the device tree specify the
+ parition probe
+
+This is to support custom partitioning schemes for embedded PPC. To use
+define your own mtd_part_parser and then add something like:
+       linux,part-probe = "my_probe", "cmdlinepart";
+        To the board's dts file.
+
+If linux,part-probe is not specified then this behaves the same as before.
+
+Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
+Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
+---
+ drivers/mtd/maps/physmap_of.c |   46 ++++++++++++++++++++++++++++++++++++++++-
+ 1 file changed, 45 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
+index fef1d1b..e46b4e9 100644
+--- a/drivers/mtd/maps/physmap_of.c
++++ b/drivers/mtd/maps/physmap_of.c
+@@ -112,9 +112,47 @@ static struct mtd_info *obsolete_probe(struct platform_device *dev,
+ static const char * const part_probe_types_def[] = {
+       "cmdlinepart", "RedBoot", "ofpart", "ofoldpart", NULL };
+ 
++static const char * const *of_get_probes(struct device_node *dp)
++{
++      const char *cp;
++      int cplen;
++      unsigned int l;
++      unsigned int count;
++      const char **res;
++
++      cp = of_get_property(dp, "linux,part-probe", &cplen);
++      if (cp == NULL)
++              return part_probe_types_def;
++
++      count = 0;
++      for (l = 0; l != cplen; l++)
++              if (cp[l] == 0)
++                      count++;
++
++      res = kzalloc((count + 1)*sizeof(*res), GFP_KERNEL);
++      if (!res)
++              return NULL;
++      count = 0;
++      while (cplen > 0) {
++              res[count] = cp;
++              l = strlen(cp) + 1;
++              cp += l;
++              cplen -= l;
++              count++;
++      }
++      return res;
++}
++
++static void of_free_probes(const char * const *probes)
++{
++      if (probes != part_probe_types_def)
++              kfree(probes);
++}
++
+ static const struct of_device_id of_flash_match[];
+ static int of_flash_probe(struct platform_device *dev)
+ {
++      const char * const *part_probe_types;
+       const struct of_device_id *match;
+       struct device_node *dp = dev->dev.of_node;
+       struct resource res;
+@@ -273,8 +311,14 @@ static int of_flash_probe(struct platform_device *dev)
+               goto err_out;
+ 
+       ppdata.of_node = dp;
+-      mtd_device_parse_register(info->cmtd, part_probe_types_def, &ppdata,
++      part_probe_types = of_get_probes(dp);
++      if (!part_probe_types) {
++              err = -ENOMEM;
++              goto err_out;
++      }
++      mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
+                       NULL, 0);
++      of_free_probes(part_probe_types);
+ 
+       kfree(mtd_list);
+ 
+-- 
+1.7.9.5
+