From: Steffen Trumtrar <s.trumtrar@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Subject: [PATCH 5/8] of: of_path: find device via partuuid
Date: Wed, 5 Jul 2017 12:56:34 +0200 [thread overview]
Message-ID: <20170705105637.4484-5-s.trumtrar@pengutronix.de> (raw)
In-Reply-To: <20170705105637.4484-1-s.trumtrar@pengutronix.de>
When a node is compatible to a fixed-partitions, support searching the
corresponding device via the partuuid, if it is specified in the devicetree.
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
---
drivers/of/of_path.c | 17 ++++++++++++++++-
1 file changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/of/of_path.c b/drivers/of/of_path.c
index 334eab841a01..e53041b0a16c 100644
--- a/drivers/of/of_path.c
+++ b/drivers/of/of_path.c
@@ -56,11 +56,26 @@ static int __of_find_path(struct device_node *node, const char *part, char **out
dev = of_find_device_by_node_path(node->full_name);
if (!dev) {
+ int ret;
+ const char *uuid;
struct device_node *devnode = node->parent;
- if (of_device_is_compatible(devnode, "fixed-partitions"))
+ if (of_device_is_compatible(devnode, "fixed-partitions")) {
devnode = devnode->parent;
+ /* when partuuid is specified short-circuit the search for the cdev */
+ ret = of_property_read_string(node, "partuuid", &uuid);
+ if (!ret) {
+ cdev = cdev_by_partuuid(uuid);
+ if (!cdev)
+ return -ENODEV;
+
+ *outpath = basprintf("/dev/%s", cdev->name);
+
+ return 0;
+ }
+ }
+
dev = of_find_device_by_node_path(devnode->full_name);
if (!dev)
return -ENODEV;
--
2.11.0
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next prev parent reply other threads:[~2017-07-05 10:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-05 10:56 [PATCH 1/8] state: fix compile warnings for dev_err expansion Steffen Trumtrar
2017-07-05 10:56 ` [PATCH 2/8] common: efi: do not use undefined kconfig option Steffen Trumtrar
2017-07-05 11:05 ` Lucas Stach
2017-07-06 7:31 ` Michael Olbrich
2017-07-05 10:56 ` [PATCH 3/8] fs: efi: return with correct error code in efifs_stat Steffen Trumtrar
2017-07-05 10:56 ` [PATCH 4/8] devfs-core: add function to find cdev by partuuid Steffen Trumtrar
2017-07-05 10:56 ` Steffen Trumtrar [this message]
2017-07-05 10:56 ` [PATCH 6/8] efi: efi: load state from devicetree Steffen Trumtrar
2017-07-05 12:38 ` Lucas Stach
2017-07-05 10:56 ` [PATCH 7/8] blspec: skip all devicetree tests if entry doesn't specify one Steffen Trumtrar
2017-07-05 10:56 ` [PATCH 8/8] efi: efi: register barebox-update handler Steffen Trumtrar
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