diff options
Diffstat (limited to 'target/linux/generic/hack-5.4/421-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch')
| -rw-r--r-- | target/linux/generic/hack-5.4/421-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/target/linux/generic/hack-5.4/421-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch b/target/linux/generic/hack-5.4/421-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch deleted file mode 100644 index 26a1796d9a..0000000000 --- a/target/linux/generic/hack-5.4/421-drivers-mtd-parsers-add-nvmem-support-to-cmdlinepart.patch +++ /dev/null @@ -1,120 +0,0 @@ -From 6fa9e3678eb002246df1280322b6a024853950a5 Mon Sep 17 00:00:00 2001 -From: Ansuel Smith <ansuelsmth@gmail.com> -Date: Mon, 11 Oct 2021 00:53:14 +0200 -Subject: [PATCH] drivers: mtd: parsers: add nvmem support to cmdlinepart - -Assuming cmdlinepart is only one level deep partition scheme and that -static partition are also defined in DTS, we can assign an of_node for -partition declared from bootargs. cmdlinepart have priority than -fiexed-partition parser so in this specific case the parser doesn't -assign an of_node. Fix this by searching a defined of_node using a -similar fixed_partition parser and if a partition is found with the same -label, check that it has the same offset and size and return the DT -of_node to correctly use NVMEM cells. - -Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> ---- - drivers/mtd/parsers/cmdlinepart.c | 71 +++++++++++++++++++++++++++++++ - 1 file changed, 71 insertions(+) - ---- a/drivers/mtd/parsers/cmdlinepart.c -+++ b/drivers/mtd/parsers/cmdlinepart.c -@@ -43,6 +43,7 @@ - #include <linux/mtd/partitions.h> - #include <linux/module.h> - #include <linux/err.h> -+#include <linux/of.h> - - /* debug macro */ - #if 0 -@@ -315,6 +316,68 @@ static int mtdpart_setup_real(char *s) - return 0; - } - -+static int search_fixed_partition(struct mtd_info *master, -+ struct mtd_partition *target_part, -+ struct mtd_partition *fixed_part) -+{ -+ struct device_node *mtd_node; -+ struct device_node *ofpart_node; -+ struct device_node *pp; -+ struct mtd_partition part; -+ const char *partname; -+ -+ mtd_node = mtd_get_of_node(master); -+ if (!mtd_node) -+ return -EINVAL; -+ -+ ofpart_node = of_get_child_by_name(mtd_node, "partitions"); -+ -+ for_each_child_of_node(ofpart_node, pp) { -+ const __be32 *reg; -+ int len; -+ int a_cells, s_cells; -+ -+ reg = of_get_property(pp, "reg", &len); -+ if (!reg) { -+ pr_debug("%s: ofpart partition %pOF (%pOF) missing reg property.\n", -+ master->name, pp, -+ mtd_node); -+ continue; -+ } -+ -+ a_cells = of_n_addr_cells(pp); -+ s_cells = of_n_size_cells(pp); -+ if (len / 4 != a_cells + s_cells) { -+ pr_debug("%s: ofpart partition %pOF (%pOF) error parsing reg property.\n", -+ master->name, pp, -+ mtd_node); -+ continue; -+ } -+ -+ part.offset = of_read_number(reg, a_cells); -+ part.size = of_read_number(reg + a_cells, s_cells); -+ part.of_node = pp; -+ -+ partname = of_get_property(pp, "label", &len); -+ if (!partname) -+ partname = of_get_property(pp, "name", &len); -+ part.name = partname; -+ -+ if (!strncmp(target_part->name, part.name, len)) { -+ if (part.offset != target_part->offset) -+ return -EINVAL; -+ -+ if (part.size != target_part->size) -+ return -EINVAL; -+ -+ memcpy(fixed_part, &part, sizeof(struct mtd_partition)); -+ return 0; -+ } -+ } -+ -+ return -EINVAL; -+} -+ - /* - * Main function to be called from the MTD mapping driver/device to - * obtain the partitioning information. At this point the command line -@@ -330,6 +393,7 @@ static int parse_cmdline_partitions(stru - int i, err; - struct cmdline_mtd_partition *part; - const char *mtd_id = master->name; -+ struct mtd_partition fixed_part; - - /* parse command line */ - if (!cmdline_parsed) { -@@ -374,6 +438,13 @@ static int parse_cmdline_partitions(stru - sizeof(*part->parts) * (part->num_parts - i)); - i--; - } -+ -+ err = search_fixed_partition(master, &part->parts[i], &fixed_part); -+ if (!err) { -+ part->parts[i].of_node = fixed_part.of_node; -+ pr_info("Found partition defined in DT for %s. Assigning OF node to support nvmem.", -+ part->parts[i].name); -+ } - } - - *pparts = kmemdup(part->parts, sizeof(*part->parts) * part->num_parts, |