diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/1239-mtd-extend-physmap_of-to-let-the-device-tree-specify.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.4/1239-mtd-extend-physmap_of-to-let-the-device-tree-specify.patch | 90 |
1 files changed, 90 insertions, 0 deletions
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 index 0000000000..8254490bb0 --- /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 + |