--- /dev/null
+From 173b0add0cff6558f950c0cb1eacfb729d482711 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke@hauke-m.de>
+Date: Sun, 17 May 2015 18:48:38 +0200
+Subject: [PATCH 4/8] mtd: part: add generic parsing of linux,part-probe
+
+This moves the linux,part-probe device tree parsing code from
+physmap_of.c to mtdpart.c. Now all drivers can use this feature by just
+providing a reference to their device tree node in struct
+mtd_part_parser_data.
+
+Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
+---
+ Documentation/devicetree/bindings/mtd/nand.txt | 16 ++++++++++
+ drivers/mtd/maps/physmap_of.c | 40 +-----------------------
+ drivers/mtd/mtdpart.c | 43 ++++++++++++++++++++++++++
+ 3 files changed, 60 insertions(+), 39 deletions(-)
+
+--- a/Documentation/devicetree/bindings/mtd/nand.txt
++++ b/Documentation/devicetree/bindings/mtd/nand.txt
+@@ -12,6 +12,22 @@
+ - nand-ecc-step-size: integer representing the number of data bytes
+ that are covered by a single ECC step.
+
++- linux,part-probe: list of name as strings of the partition parser
++ which should be used to parse the partition table.
++ They will be tried in the specified ordering and
++ the next one will be used if the previous one
++ failed.
++
++ Example: linux,part-probe = "cmdlinepart", "ofpart";
++
++ This is also the default value, which will be used
++ if this attribute is not specified. It could be
++ that the flash driver in use overwrote the default
++ value and uses some other default.
++
++ Possible values are: bcm47xxpart, afs, ar7part,
++ ofoldpart, ofpart, bcm63xxpart, RedBoot, cmdlinepart
++
+ The ECC strength and ECC step size properties define the correction capability
+ of a controller. Together, they say a controller can correct "{strength} bit
+ errors per {size} bytes".
+--- a/drivers/mtd/maps/physmap_of.c
++++ b/drivers/mtd/maps/physmap_of.c
+@@ -114,45 +114,9 @@ static struct mtd_info *obsolete_probe(s
+ 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);
+- 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 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;
+@@ -302,10 +266,8 @@ static int of_flash_probe(struct platfor
+ goto err_out;
+
+ ppdata.of_node = dp;
+- part_probe_types = of_get_probes(dp);
+- mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
++ mtd_device_parse_register(info->cmtd, part_probe_types_def, &ppdata,
+ NULL, 0);
+- of_free_probes(part_probe_types);
+
+ kfree(mtd_list);
+
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -29,6 +29,7 @@
+ #include <linux/kmod.h>
+ #include <linux/mtd/mtd.h>
+ #include <linux/mtd/partitions.h>
++#include <linux/of.h>
+ #include <linux/err.h>
+
+ #include "mtdcore.h"
+@@ -702,6 +703,40 @@ void deregister_mtd_parser(struct mtd_pa
+ EXPORT_SYMBOL_GPL(deregister_mtd_parser);
+
+ /*
++ * Parses the linux,part-probe device tree property.
++ * When a non null value is returned it has to be freed with kfree() by
++ * the caller.
++ */
++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 NULL;
++
++ count = 0;
++ for (l = 0; l != cplen; l++)
++ if (cp[l] == 0)
++ count++;
++
++ res = kzalloc((count + 1) * sizeof(*res), GFP_KERNEL);
++ count = 0;
++ while (cplen > 0) {
++ res[count] = cp;
++ l = strlen(cp) + 1;
++ cp += l;
++ cplen -= l;
++ count++;
++ }
++ return res;
++}
++
++/*
+ * Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you
+ * are changing this array!
+ */
+@@ -737,6 +772,13 @@ int parse_mtd_partitions(struct mtd_info
+ {
+ struct mtd_part_parser *parser;
+ int ret = 0;
++ const char *const *types_of = NULL;
++
++ if (data && data->of_node) {
++ types_of = of_get_probes(data->of_node);
++ if (types_of != NULL)
++ types = types_of;
++ }
+
+ if (!types)
+ types = default_mtd_part_types;
+@@ -755,6 +797,7 @@ int parse_mtd_partitions(struct mtd_info
+ break;
+ }
+ }
++ kfree(types_of);
+ return ret;
+ }
+
projects / openwrt / staging / wigyori.git / blobdiff