From: Rafał Miłecki Date: Tue, 18 Oct 2022 20:12:27 +0000 (+0200) Subject: kernel: mtd: backport extended dynamic partitions support X-Git-Tag: v21.02.6~148 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3e8a713bc4f623afba5afc1f6e323251ad395690;p=openwrt%2Fstaging%2Fpepe2k.git kernel: mtd: backport extended dynamic partitions support This gets rid of "nvmem-cells" limitation. Dynamic partitions can be defined for any (sub)partitions layout. Signed-off-by: Rafał Miłecki (cherry picked from commit 4eda414b09c790344e47c1cebe78e5433b4dc10d) --- diff --git a/target/linux/generic/backport-5.4/417-v6.2-0001-mtd-core-simplify-a-bit-code-find-partition-matching.patch b/target/linux/generic/backport-5.4/417-v6.2-0001-mtd-core-simplify-a-bit-code-find-partition-matching.patch new file mode 100644 index 0000000000..4f5befbde7 --- /dev/null +++ b/target/linux/generic/backport-5.4/417-v6.2-0001-mtd-core-simplify-a-bit-code-find-partition-matching.patch @@ -0,0 +1,65 @@ +From 63db0cb35e1cb3b3c134906d1062f65513fdda2d Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Tue, 4 Oct 2022 10:37:09 +0200 +Subject: [PATCH] mtd: core: simplify (a bit) code find partition-matching + dynamic OF node +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +1. Don't hardcode "partition-" string twice +2. Use simpler logic & use ->name to avoid of_property_read_string() +3. Use mtd_get_of_node() helper + +Cc: Christian Marangi +Signed-off-by: Rafał Miłecki +Signed-off-by: Miquel Raynal +Link: https://lore.kernel.org/linux-mtd/20221004083710.27704-1-zajec5@gmail.com +--- + drivers/mtd/mtdcore.c | 16 +++++++--------- + 1 file changed, 7 insertions(+), 9 deletions(-) + +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -594,18 +594,16 @@ static void mtd_check_of_node(struct mtd + struct device_node *partitions, *parent_dn, *mtd_dn = NULL; + const char *pname, *prefix = "partition-"; + int plen, mtd_name_len, offset, prefix_len; +- struct mtd_info *parent; + bool found = false; + + /* Check if MTD already has a device node */ +- if (dev_of_node(&mtd->dev)) ++ if (mtd_get_of_node(mtd)) + return; + + /* Check if a partitions node exist */ + if (!mtd_is_partition(mtd)) + return; +- parent = mtd_get_master(mtd); +- parent_dn = of_node_get(dev_of_node(&parent->dev)); ++ parent_dn = of_node_get(mtd_get_of_node(mtd_get_master(mtd))); + if (!parent_dn) + return; + +@@ -618,15 +616,15 @@ static void mtd_check_of_node(struct mtd + + /* Search if a partition is defined with the same name */ + for_each_child_of_node(partitions, mtd_dn) { +- offset = 0; +- + /* Skip partition with no/wrong prefix */ +- if (!of_node_name_prefix(mtd_dn, "partition-")) ++ if (!of_node_name_prefix(mtd_dn, prefix)) + continue; + + /* Label have priority. Check that first */ +- if (of_property_read_string(mtd_dn, "label", &pname)) { +- of_property_read_string(mtd_dn, "name", &pname); ++ if (!of_property_read_string(mtd_dn, "label", &pname)) { ++ offset = 0; ++ } else { ++ pname = mtd_dn->name; + offset = prefix_len; + } + diff --git a/target/linux/generic/backport-5.4/417-v6.2-0002-mtd-core-try-to-find-OF-node-for-every-MTD-partition.patch b/target/linux/generic/backport-5.4/417-v6.2-0002-mtd-core-try-to-find-OF-node-for-every-MTD-partition.patch new file mode 100644 index 0000000000..366492f4c5 --- /dev/null +++ b/target/linux/generic/backport-5.4/417-v6.2-0002-mtd-core-try-to-find-OF-node-for-every-MTD-partition.patch @@ -0,0 +1,84 @@ +From ddb8cefb7af288950447ca6eeeafb09977dab56f Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Tue, 4 Oct 2022 10:37:10 +0200 +Subject: [PATCH] mtd: core: try to find OF node for every MTD partition +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +So far this feature was limited to the top-level "nvmem-cells" node. +There are multiple parsers creating partitions and subpartitions +dynamically. Extend that code to handle them too. + +This allows finding partition-* node for every MTD (sub)partition. + +Random example: + +partitions { + compatible = "brcm,bcm947xx-cfe-partitions"; + + partition-firmware { + compatible = "brcm,trx"; + + partition-loader { + }; + }; +}; + +Cc: Christian Marangi +Signed-off-by: Rafał Miłecki +Signed-off-by: Miquel Raynal +Link: https://lore.kernel.org/linux-mtd/20221004083710.27704-2-zajec5@gmail.com +--- + drivers/mtd/mtdcore.c | 18 ++++++------------ + 1 file changed, 6 insertions(+), 12 deletions(-) + +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -594,20 +594,22 @@ static void mtd_check_of_node(struct mtd + struct device_node *partitions, *parent_dn, *mtd_dn = NULL; + const char *pname, *prefix = "partition-"; + int plen, mtd_name_len, offset, prefix_len; +- bool found = false; + + /* Check if MTD already has a device node */ + if (mtd_get_of_node(mtd)) + return; + +- /* Check if a partitions node exist */ + if (!mtd_is_partition(mtd)) + return; ++ + parent_dn = of_node_get(mtd_get_of_node(mtd_get_master(mtd))); + if (!parent_dn) + return; + +- partitions = of_get_child_by_name(parent_dn, "partitions"); ++ if (mtd_is_partition(mtd_get_master(mtd))) ++ partitions = of_node_get(parent_dn); ++ else ++ partitions = of_get_child_by_name(parent_dn, "partitions"); + if (!partitions) + goto exit_parent; + +@@ -631,19 +633,11 @@ static void mtd_check_of_node(struct mtd + plen = strlen(pname) - offset; + if (plen == mtd_name_len && + !strncmp(mtd->name, pname + offset, plen)) { +- found = true; ++ mtd_set_of_node(mtd, mtd_dn); + break; + } + } + +- if (!found) +- goto exit_partitions; +- +- /* Set of_node only for nvmem */ +- if (of_device_is_compatible(mtd_dn, "nvmem-cells")) +- mtd_set_of_node(mtd, mtd_dn); +- +-exit_partitions: + of_node_put(partitions); + exit_parent: + of_node_put(parent_dn); diff --git a/target/linux/generic/pending-5.4/480-mtd-set-rootfs-to-be-root-dev.patch b/target/linux/generic/pending-5.4/480-mtd-set-rootfs-to-be-root-dev.patch index 2544fa4b69..53894df69a 100644 --- a/target/linux/generic/pending-5.4/480-mtd-set-rootfs-to-be-root-dev.patch +++ b/target/linux/generic/pending-5.4/480-mtd-set-rootfs-to-be-root-dev.patch @@ -20,7 +20,7 @@ Signed-off-by: Gabor Juhos #include #include -@@ -762,6 +763,15 @@ int add_mtd_device(struct mtd_info *mtd) +@@ -754,6 +755,15 @@ int add_mtd_device(struct mtd_info *mtd) of this try_ nonsense, and no bitching about it either. :) */ __module_get(THIS_MODULE); diff --git a/target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch b/target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch index ada1415853..1b726c3345 100644 --- a/target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch +++ b/target/linux/generic/pending-5.4/495-mtd-core-add-get_mtd_device_by_node.patch @@ -17,7 +17,7 @@ Reviewed-by: Miquel Raynal --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -1144,6 +1144,44 @@ out_unlock: +@@ -1136,6 +1136,44 @@ out_unlock: } EXPORT_SYMBOL_GPL(get_mtd_device_nm); diff --git a/target/linux/pistachio/patches-5.4/401-mtd-nor-support-mtd-name-from-device-tree.patch b/target/linux/pistachio/patches-5.4/401-mtd-nor-support-mtd-name-from-device-tree.patch index 7a1dd8be1d..b86e4ee014 100644 --- a/target/linux/pistachio/patches-5.4/401-mtd-nor-support-mtd-name-from-device-tree.patch +++ b/target/linux/pistachio/patches-5.4/401-mtd-nor-support-mtd-name-from-device-tree.patch @@ -34,7 +34,7 @@ Signed-off-by: Abhimanyu Vishwakarma mtd->type = MTD_NORFLASH; --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -842,6 +842,17 @@ out_error: +@@ -834,6 +834,17 @@ out_error: */ static void mtd_set_dev_defaults(struct mtd_info *mtd) {