52e042ea55
This adds the upstream Broadcom nand driver and makes use of it. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> SVN-Revision: 46131
175 lines
4.9 KiB
Diff
175 lines
4.9 KiB
Diff
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
|
|
@@ -112,45 +112,9 @@ 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;
|
|
@@ -310,10 +274,8 @@ 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/magic.h>
|
|
#include <linux/err.h>
|
|
#include <linux/kconfig.h>
|
|
@@ -992,6 +993,40 @@ 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!
|
|
*/
|
|
@@ -1027,6 +1062,13 @@ 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;
|
|
@@ -1045,6 +1087,7 @@ int parse_mtd_partitions(struct mtd_info
|
|
break;
|
|
}
|
|
}
|
|
+ kfree(types_of);
|
|
return ret;
|
|
}
|
|
|