diff options
Diffstat (limited to 'target/linux/generic/patches-3.18/140-mtd-part-add-generic-parsing-of-linux-part-probe.patch')
| -rw-r--r-- | target/linux/generic/patches-3.18/140-mtd-part-add-generic-parsing-of-linux-part-probe.patch | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/140-mtd-part-add-generic-parsing-of-linux-part-probe.patch b/target/linux/generic/patches-3.18/140-mtd-part-add-generic-parsing-of-linux-part-probe.patch new file mode 100644 index 0000000..bd34f96 --- /dev/null +++ b/target/linux/generic/patches-3.18/140-mtd-part-add-generic-parsing-of-linux-part-probe.patch @@ -0,0 +1,175 @@ +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; + } + |