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- --- a/drivers/mtd/parsers/ofpart.c
- +++ b/drivers/mtd/parsers/ofpart.c
- @@ -21,6 +21,38 @@ static bool node_has_compatible(struct d
- return of_get_property(pp, "compatible", NULL);
- }
-
- +static uint8_t * brnboot_get_selected_root_part(struct mtd_info *master,
- + loff_t offset)
- +{
- + static uint8_t root_id;
- + int err, len;
- +
- + err = mtd_read(master, offset, 0x01, &len, &root_id);
- +
- + if (mtd_is_bitflip(err) || !err)
- + return &root_id;
- +
- + return NULL;
- +}
- +
- +static void brnboot_set_active_root_part(struct mtd_partition *pparts,
- + struct device_node **part_nodes,
- + int nr_parts,
- + uint8_t *root_id)
- +{
- + int i;
- +
- + for (i = 0; i < nr_parts; i++) {
- + int part_root_id;
- +
- + if (!of_property_read_u32(part_nodes[i], "brnboot,root-id", &part_root_id)
- + && part_root_id == *root_id) {
- + pparts[i].name = "firmware";
- + break;
- + }
- + }
- +}
- +
- static int parse_fixed_partitions(struct mtd_info *master,
- const struct mtd_partition **pparts,
- struct mtd_part_parser_data *data)
- @@ -32,7 +64,8 @@ static int parse_fixed_partitions(struct
- struct device_node *pp;
- int nr_parts, i, ret = 0;
- bool dedicated = true;
- -
- + uint8_t *proot_id = NULL;
- + struct device_node **part_nodes;
-
- /* Pull of_node from the master device node */
- mtd_node = mtd_get_of_node(master);
- @@ -68,7 +101,9 @@ static int parse_fixed_partitions(struct
- return 0;
-
- parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
- - if (!parts)
- + part_nodes = kcalloc(nr_parts, sizeof(*part_nodes), GFP_KERNEL);
- +
- + if (!parts || !part_nodes)
- return -ENOMEM;
-
- i = 0;
- @@ -117,12 +152,22 @@ static int parse_fixed_partitions(struct
- if (of_get_property(pp, "lock", &len))
- parts[i].mask_flags |= MTD_POWERUP_LOCK;
-
- + if (!proot_id && of_device_is_compatible(pp, "brnboot,root-selector"))
- + proot_id = brnboot_get_selected_root_part(master, parts[i].offset);
- +
- + part_nodes[i] = pp;
- +
- i++;
- }
-
- if (!nr_parts)
- goto ofpart_none;
-
- + if (proot_id)
- + brnboot_set_active_root_part(parts, part_nodes, nr_parts, proot_id);
- +
- + kfree(part_nodes);
- +
- *pparts = parts;
- return nr_parts;
-
- @@ -133,6 +178,7 @@ ofpart_fail:
- ofpart_none:
- of_node_put(pp);
- kfree(parts);
- + kfree(part_nodes);
- return ret;
- }
-
|
