mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-24 07:46:48 +00:00
fc153aa8d9
Similar to supporting nvmem-layouts on MTD devices, also allow referencing UBI and MMC devices in DT. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
78 lines
2.3 KiB
Diff
78 lines
2.3 KiB
Diff
From 614f4f6fdda09e30ecf7ef6c8091579db15018cb Mon Sep 17 00:00:00 2001
|
|
From: Daniel Golle <daniel@makrotopia.org>
|
|
Date: Fri, 21 Jul 2023 17:51:03 +0100
|
|
Subject: [PATCH 09/15] block: partitions: populate fwnode
|
|
|
|
Let block partitions to be represented by a firmware node and hence
|
|
allow them to being referenced e.g. for use with blk-nvmem.
|
|
|
|
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
|
|
---
|
|
block/partitions/core.c | 41 +++++++++++++++++++++++++++++++++++++++++
|
|
1 file changed, 41 insertions(+)
|
|
|
|
--- a/block/partitions/core.c
|
|
+++ b/block/partitions/core.c
|
|
@@ -10,6 +10,8 @@
|
|
#include <linux/ctype.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/raid/detect.h>
|
|
+#include <linux/property.h>
|
|
+
|
|
#include "check.h"
|
|
|
|
static int (*check_part[])(struct parsed_partitions *) = {
|
|
@@ -298,6 +300,43 @@ static ssize_t whole_disk_show(struct de
|
|
}
|
|
static DEVICE_ATTR(whole_disk, 0444, whole_disk_show, NULL);
|
|
|
|
+static struct fwnode_handle *find_partition_fwnode(struct block_device *bdev)
|
|
+{
|
|
+ struct fwnode_handle *fw_parts, *fw_part;
|
|
+ struct device *ddev = disk_to_dev(bdev->bd_disk);
|
|
+ const char *partname, *uuid;
|
|
+ u32 partno;
|
|
+
|
|
+ fw_parts = device_get_named_child_node(ddev, "partitions");
|
|
+ if (!fw_parts)
|
|
+ fw_parts = device_get_named_child_node(ddev->parent, "partitions");
|
|
+
|
|
+ if (!fw_parts)
|
|
+ return NULL;
|
|
+
|
|
+ fwnode_for_each_child_node(fw_parts, fw_part) {
|
|
+ if (!fwnode_property_read_string(fw_part, "uuid", &uuid) &&
|
|
+ (!bdev->bd_meta_info || strncmp(uuid,
|
|
+ bdev->bd_meta_info->uuid,
|
|
+ PARTITION_META_INFO_UUIDLTH)))
|
|
+ continue;
|
|
+
|
|
+ if (!fwnode_property_read_string(fw_part, "partname", &partname) &&
|
|
+ (!bdev->bd_meta_info || strncmp(partname,
|
|
+ bdev->bd_meta_info->volname,
|
|
+ PARTITION_META_INFO_VOLNAMELTH)))
|
|
+ continue;
|
|
+
|
|
+ if (!fwnode_property_read_u32(fw_part, "partno", &partno) &&
|
|
+ bdev->bd_partno != partno)
|
|
+ continue;
|
|
+
|
|
+ return fw_part;
|
|
+ }
|
|
+
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
/*
|
|
* Must be called either with open_mutex held, before a disk can be opened or
|
|
* after all disk users are gone.
|
|
@@ -380,6 +419,8 @@ static struct block_device *add_partitio
|
|
goto out_put;
|
|
}
|
|
|
|
+ device_set_node(pdev, find_partition_fwnode(bdev));
|
|
+
|
|
/* delay uevent until 'holders' subdir is created */
|
|
dev_set_uevent_suppress(pdev, 1);
|
|
err = device_add(pdev);
|