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9d15baee6b
This commit adds headers to the patches, so they can be applied with the
git am command.
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
(cherry picked from commit 5d51079fd0)
104 lines
2.7 KiB
Diff
104 lines
2.7 KiB
Diff
From 2c82524000cca691c89c9fda251b55ef04eabcb6 Mon Sep 17 00:00:00 2001
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From: Mathias Kresin <openwrt@kresin.me>
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Date: Mon, 2 May 2016 18:50:00 +0000
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Subject: [PATCH] find active root
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Signed-off-by: Mathias Kresin <openwrt@kresin.me>
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---
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drivers/mtd/parsers/ofpart_core.c | 49 ++++++++++++++++++++++++++++++-
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1 file changed, 48 insertions(+), 1 deletion(-)
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--- a/drivers/mtd/parsers/ofpart_core.c
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+++ b/drivers/mtd/parsers/ofpart_core.c
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@@ -38,6 +38,38 @@ static bool node_has_compatible(struct d
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return of_get_property(pp, "compatible", NULL);
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}
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+static uint8_t * brnboot_get_selected_root_part(struct mtd_info *master,
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+ loff_t offset)
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+{
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+ static uint8_t root_id;
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+ int err, len;
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+
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+ err = mtd_read(master, offset, 0x01, &len, &root_id);
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+
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+ if (mtd_is_bitflip(err) || !err)
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+ return &root_id;
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+
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+ return NULL;
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+}
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+
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+static void brnboot_set_active_root_part(struct mtd_partition *pparts,
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+ struct device_node **part_nodes,
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+ int nr_parts,
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+ uint8_t *root_id)
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+{
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+ int i;
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+
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+ for (i = 0; i < nr_parts; i++) {
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+ int part_root_id;
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+
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+ if (!of_property_read_u32(part_nodes[i], "brnboot,root-id", &part_root_id)
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+ && part_root_id == *root_id) {
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+ pparts[i].name = "firmware";
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+ break;
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+ }
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+ }
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+}
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+
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static int parse_fixed_partitions(struct mtd_info *master,
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const struct mtd_partition **pparts,
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struct mtd_part_parser_data *data)
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@@ -51,6 +83,8 @@ static int parse_fixed_partitions(struct
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struct device_node *pp;
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int nr_parts, i, ret = 0;
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bool dedicated = true;
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+ uint8_t *proot_id = NULL;
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+ struct device_node **part_nodes;
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/* Pull of_node from the master device node */
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mtd_node = mtd_get_of_node(master);
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@@ -95,7 +129,9 @@ static int parse_fixed_partitions(struct
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return 0;
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parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
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- if (!parts)
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+ part_nodes = kcalloc(nr_parts, sizeof(*part_nodes), GFP_KERNEL);
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+
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+ if (!parts || !part_nodes)
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return -ENOMEM;
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i = 0;
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@@ -147,6 +183,11 @@ static int parse_fixed_partitions(struct
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if (of_property_read_bool(pp, "slc-mode"))
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parts[i].add_flags |= MTD_SLC_ON_MLC_EMULATION;
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+ if (!proot_id && of_device_is_compatible(pp, "brnboot,root-selector"))
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+ proot_id = brnboot_get_selected_root_part(master, parts[i].offset);
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+
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+ part_nodes[i] = pp;
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+
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i++;
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}
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@@ -156,6 +197,11 @@ static int parse_fixed_partitions(struct
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if (quirks && quirks->post_parse)
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quirks->post_parse(master, parts, nr_parts);
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+ if (proot_id)
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+ brnboot_set_active_root_part(parts, part_nodes, nr_parts, proot_id);
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+
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+ kfree(part_nodes);
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+
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*pparts = parts;
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return nr_parts;
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@@ -166,6 +212,7 @@ ofpart_fail:
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ofpart_none:
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of_node_put(pp);
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kfree(parts);
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+ kfree(part_nodes);
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return ret;
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}
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