diff options
Diffstat (limited to 'target/linux/generic/backport-4.9')
3 files changed, 318 insertions, 0 deletions
diff --git a/target/linux/generic/backport-4.9/067-v4.17-0001-mtd-partitions-add-of_match_table-parser-matching-fo.patch b/target/linux/generic/backport-4.9/067-v4.17-0001-mtd-partitions-add-of_match_table-parser-matching-fo.patch new file mode 100644 index 0000000000..60eace2a34 --- /dev/null +++ b/target/linux/generic/backport-4.9/067-v4.17-0001-mtd-partitions-add-of_match_table-parser-matching-fo.patch @@ -0,0 +1,200 @@ +From 5b644aa012f67fd211138a067b9f351f30bdcc60 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Wed, 14 Mar 2018 13:10:42 +0100 +Subject: [PATCH] mtd: partitions: add of_match_table parser matching for the + "ofpart" type +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +In order to properly support compatibility strings as described in the +bindings/mtd/partition.txt "ofpart" type should be treated as an +indication for looking into OF. MTD should check "compatible" property +and search for a matching parser rather than blindly trying the one +supporting "fixed-partitions". + +It also means that existing "fixed-partitions" parser should get renamed +to use a more meaningful name. + +This commit achievies that aim by introducing a new mtd_part_of_parse(). +It works by looking for a matching parser for every string in the +"compatibility" property (starting with the most specific one). + +Please note that driver-specified parsers still take a precedence. It's +assumed that driver providing a parser type has a good reason for that +(e.g. having platform data with device-specific info). Also doing +otherwise could break existing setups. The same applies to using default +parsers (including "cmdlinepart") as some overwrite DT data with cmdline +argument. + +Partition parsers can now provide an of_match_table to enable +flash<-->parser matching via device tree as documented in the +mtd/partition.txt. + +This support is currently limited to built-in parsers as it uses +request_module() and friends. This should be sufficient for most cases +though as compiling parsers as modules isn't a common choice. + +Signed-off-by: Brian Norris <computersforpeace@gmail.com> +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Tested-by: Peter Rosin <peda@axentia.se> +Reviewed-by: Richard Weinberger <richard@nod.at> +Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> +--- + drivers/mtd/mtdpart.c | 116 +++++++++++++++++++++++++++++++++++++---- + include/linux/mtd/partitions.h | 1 + + 2 files changed, 108 insertions(+), 9 deletions(-) + +--- a/drivers/mtd/mtdpart.c ++++ b/drivers/mtd/mtdpart.c +@@ -30,6 +30,7 @@ + #include <linux/mtd/mtd.h> + #include <linux/mtd/partitions.h> + #include <linux/err.h> ++#include <linux/of.h> + + #include "mtdcore.h" + +@@ -886,6 +887,92 @@ static int mtd_part_do_parse(struct mtd_ + } + + /** ++ * mtd_part_get_compatible_parser - find MTD parser by a compatible string ++ * ++ * @compat: compatible string describing partitions in a device tree ++ * ++ * MTD parsers can specify supported partitions by providing a table of ++ * compatibility strings. This function finds a parser that advertises support ++ * for a passed value of "compatible". ++ */ ++static struct mtd_part_parser *mtd_part_get_compatible_parser(const char *compat) ++{ ++ struct mtd_part_parser *p, *ret = NULL; ++ ++ spin_lock(&part_parser_lock); ++ ++ list_for_each_entry(p, &part_parsers, list) { ++ const struct of_device_id *matches; ++ ++ matches = p->of_match_table; ++ if (!matches) ++ continue; ++ ++ for (; matches->compatible[0]; matches++) { ++ if (!strcmp(matches->compatible, compat) && ++ try_module_get(p->owner)) { ++ ret = p; ++ break; ++ } ++ } ++ ++ if (ret) ++ break; ++ } ++ ++ spin_unlock(&part_parser_lock); ++ ++ return ret; ++} ++ ++static int mtd_part_of_parse(struct mtd_info *master, ++ struct mtd_partitions *pparts) ++{ ++ struct mtd_part_parser *parser; ++ struct device_node *np; ++ struct property *prop; ++ const char *compat; ++ const char *fixed = "ofpart"; ++ int ret, err = 0; ++ ++ np = of_get_child_by_name(mtd_get_of_node(master), "partitions"); ++ of_property_for_each_string(np, "compatible", prop, compat) { ++ parser = mtd_part_get_compatible_parser(compat); ++ if (!parser) ++ continue; ++ ret = mtd_part_do_parse(parser, master, pparts, NULL); ++ if (ret > 0) { ++ of_node_put(np); ++ return ret; ++ } ++ mtd_part_parser_put(parser); ++ if (ret < 0 && !err) ++ err = ret; ++ } ++ of_node_put(np); ++ ++ /* ++ * For backward compatibility we have to try the "ofpart" ++ * parser. It supports old DT format with partitions specified as a ++ * direct subnodes of a flash device DT node without any compatibility ++ * specified we could match. ++ */ ++ parser = mtd_part_parser_get(fixed); ++ if (!parser && !request_module("%s", fixed)) ++ parser = mtd_part_parser_get(fixed); ++ if (parser) { ++ ret = mtd_part_do_parse(parser, master, pparts, NULL); ++ if (ret > 0) ++ return ret; ++ mtd_part_parser_put(parser); ++ if (ret < 0 && !err) ++ err = ret; ++ } ++ ++ return err; ++} ++ ++/** + * parse_mtd_partitions - parse MTD partitions + * @master: the master partition (describes whole MTD device) + * @types: names of partition parsers to try or %NULL +@@ -917,19 +1004,30 @@ int parse_mtd_partitions(struct mtd_info + types = default_mtd_part_types; + + for ( ; *types; types++) { +- pr_debug("%s: parsing partitions %s\n", master->name, *types); +- parser = mtd_part_parser_get(*types); +- if (!parser && !request_module("%s", *types)) ++ /* ++ * ofpart is a special type that means OF partitioning info ++ * should be used. It requires a bit different logic so it is ++ * handled in a separated function. ++ */ ++ if (!strcmp(*types, "ofpart")) { ++ ret = mtd_part_of_parse(master, pparts); ++ } else { ++ pr_debug("%s: parsing partitions %s\n", master->name, ++ *types); + parser = mtd_part_parser_get(*types); +- pr_debug("%s: got parser %s\n", master->name, +- parser ? parser->name : NULL); +- if (!parser) +- continue; +- ret = mtd_part_do_parse(parser, master, pparts, data); ++ if (!parser && !request_module("%s", *types)) ++ parser = mtd_part_parser_get(*types); ++ pr_debug("%s: got parser %s\n", master->name, ++ parser ? parser->name : NULL); ++ if (!parser) ++ continue; ++ ret = mtd_part_do_parse(parser, master, pparts, data); ++ if (ret <= 0) ++ mtd_part_parser_put(parser); ++ } + /* Found partitions! */ + if (ret > 0) + return 0; +- mtd_part_parser_put(parser); + /* + * Stash the first error we see; only report it if no parser + * succeeds +--- a/include/linux/mtd/partitions.h ++++ b/include/linux/mtd/partitions.h +@@ -77,6 +77,7 @@ struct mtd_part_parser { + struct list_head list; + struct module *owner; + const char *name; ++ const struct of_device_id *of_match_table; + int (*parse_fn)(struct mtd_info *, const struct mtd_partition **, + struct mtd_part_parser_data *); + void (*cleanup)(const struct mtd_partition *pparts, int nr_parts); diff --git a/target/linux/generic/backport-4.9/067-v4.17-0002-mtd-rename-ofpart-parser-to-fixed-partitions-as-it-f.patch b/target/linux/generic/backport-4.9/067-v4.17-0002-mtd-rename-ofpart-parser-to-fixed-partitions-as-it-f.patch new file mode 100644 index 0000000000..59f53df101 --- /dev/null +++ b/target/linux/generic/backport-4.9/067-v4.17-0002-mtd-rename-ofpart-parser-to-fixed-partitions-as-it-f.patch @@ -0,0 +1,74 @@ +From c0faf43482e7f7dfb6d61847cb93d17748560b24 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Wed, 14 Mar 2018 13:10:43 +0100 +Subject: [PATCH] mtd: rename "ofpart" parser to "fixed-partitions" as it fits + it better +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Type "ofpart" means that OF should be used to get partitioning info and +this driver supports "fixed-partitions" binding only. Renaming it should +lead to less confusion especially when parsers for new compatibility +strings start to appear. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Reviewed-by: Richard Weinberger <richard@nod.at> +Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> +--- + drivers/mtd/mtdpart.c | 4 ++-- + drivers/mtd/ofpart.c | 11 ++++++----- + 2 files changed, 8 insertions(+), 7 deletions(-) + +--- a/drivers/mtd/mtdpart.c ++++ b/drivers/mtd/mtdpart.c +@@ -932,7 +932,7 @@ static int mtd_part_of_parse(struct mtd_ + struct device_node *np; + struct property *prop; + const char *compat; +- const char *fixed = "ofpart"; ++ const char *fixed = "fixed-partitions"; + int ret, err = 0; + + np = of_get_child_by_name(mtd_get_of_node(master), "partitions"); +@@ -952,7 +952,7 @@ static int mtd_part_of_parse(struct mtd_ + of_node_put(np); + + /* +- * For backward compatibility we have to try the "ofpart" ++ * For backward compatibility we have to try the "fixed-partitions" + * parser. It supports old DT format with partitions specified as a + * direct subnodes of a flash device DT node without any compatibility + * specified we could match. +--- a/drivers/mtd/ofpart.c ++++ b/drivers/mtd/ofpart.c +@@ -25,9 +25,9 @@ static bool node_has_compatible(struct d + return of_get_property(pp, "compatible", NULL); + } + +-static int parse_ofpart_partitions(struct mtd_info *master, +- const struct mtd_partition **pparts, +- struct mtd_part_parser_data *data) ++static int parse_fixed_partitions(struct mtd_info *master, ++ const struct mtd_partition **pparts, ++ struct mtd_part_parser_data *data) + { + struct mtd_partition *parts; + struct device_node *mtd_node; +@@ -141,8 +141,8 @@ ofpart_none: + } + + static struct mtd_part_parser ofpart_parser = { +- .parse_fn = parse_ofpart_partitions, +- .name = "ofpart", ++ .parse_fn = parse_fixed_partitions, ++ .name = "fixed-partitions", + }; + + static int parse_ofoldpart_partitions(struct mtd_info *master, +@@ -230,4 +230,5 @@ MODULE_AUTHOR("Vitaly Wool, David Gibson + * with the same name. Since we provide the ofoldpart parser, we should have + * the corresponding alias. + */ ++MODULE_ALIAS("fixed-partitions"); + MODULE_ALIAS("ofoldpart"); diff --git a/target/linux/generic/backport-4.9/067-v4.17-0003-mtd-ofpart-add-of_match_table-with-fixed-partitions.patch b/target/linux/generic/backport-4.9/067-v4.17-0003-mtd-ofpart-add-of_match_table-with-fixed-partitions.patch new file mode 100644 index 0000000000..d6958c3eac --- /dev/null +++ b/target/linux/generic/backport-4.9/067-v4.17-0003-mtd-ofpart-add-of_match_table-with-fixed-partitions.patch @@ -0,0 +1,44 @@ +From 97b0c7c0df3efd7048ed39d7e2dee34cafd55887 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl> +Date: Wed, 14 Mar 2018 13:10:44 +0100 +Subject: [PATCH] mtd: ofpart: add of_match_table with "fixed-partitions" +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This allows using this parser with any flash driver that takes care of +setting of_node (using mtd_set_of_node helper) correctly. Up to now +support for "fixed-partitions" DT compatibility string was working only +with flash drivers that were specifying "ofpart" (manually or by letting +mtd use the default set of parsers). + +This matches existing bindings documentation. + +Signed-off-by: Rafał Miłecki <rafal@milecki.pl> +Reviewed-by: Brian Norris <computersforpeace@gmail.com> +Tested-by: Brian Norris <computersforpeace@gmail.com> +Reviewed-by: Richard Weinberger <richard@nod.at> +Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> +--- + drivers/mtd/ofpart.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +--- a/drivers/mtd/ofpart.c ++++ b/drivers/mtd/ofpart.c +@@ -140,9 +140,16 @@ ofpart_none: + return ret; + } + ++static const struct of_device_id parse_ofpart_match_table[] = { ++ { .compatible = "fixed-partitions" }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, parse_ofpart_match_table); ++ + static struct mtd_part_parser ofpart_parser = { + .parse_fn = parse_fixed_partitions, + .name = "fixed-partitions", ++ .of_match_table = parse_ofpart_match_table, + }; + + static int parse_ofoldpart_partitions(struct mtd_info *master, |