mail archive of the barebox mailing list
 help / color / mirror / Atom feed
From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 01/42] state: Make pointing to the backend using a phandle the only supported method
Date: Fri, 31 Mar 2017 09:03:05 +0200	[thread overview]
Message-ID: <20170331070346.26878-2-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20170331070346.26878-1-s.hauer@pengutronix.de>

All other methods are broken for some time already: When starting the
kernel the state code rewrites the state node in the device tree and
replaced the "backend" property with a phandle - even when the target
can't be described as a phandle. Since using phandles is the nicest way
to point to the storage device anyway remove the other methods.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 .../devicetree/bindings/barebox/barebox,state.rst  | 27 ++++++++++++++++------
 common/state/state.c                               | 21 ++++++++---------
 2 files changed, 29 insertions(+), 19 deletions(-)

diff --git a/Documentation/devicetree/bindings/barebox/barebox,state.rst b/Documentation/devicetree/bindings/barebox/barebox,state.rst
index 438cc434a2..e9daa65f1a 100644
--- a/Documentation/devicetree/bindings/barebox/barebox,state.rst
+++ b/Documentation/devicetree/bindings/barebox/barebox,state.rst
@@ -29,7 +29,8 @@ Required properties:
 
 * ``compatible``: should be ``barebox,state``;
 * ``magic``: A 32bit number used as a magic to identify the state
-* ``backend``: describes where the data for this state is stored
+* ``backend``: contains a phandle to the device/partition which holds the
+  actual state data.
 * ``backend-type``: should be ``raw`` or ``dtb``.
 
 Optional properties:
@@ -77,19 +78,31 @@ Example::
   	magic = <0x27031977>;
   	compatible = "barebox,state";
   	backend-type = "raw";
-  	backend = &eeprom, "partname:state";
+  	backend = &state_part;
 
   	foo {
-		reg = <0x00 0x4>;
-		type = "uint32";
+  		reg = <0x00 0x4>;
+  		type = "uint32";
   		default = <0x0>;
   	};
 
   	bar {
-		reg = <0x10 0x4>;
-		type = "enum32";
+  		reg = <0x10 0x4>;
+  		type = "enum32";
   		names = "baz", "qux";
-		default = <1>;
+  		default = <1>;
+  	};
+  };
+
+  &nand_flash {
+  	partitions {
+  		compatible = "fixed-partitions";
+  		#address-cells = <1>;
+  		#size-cells = <1>;
+  		state_part: state@10000 {
+  			label = "state";
+  			reg = <0x10000 0x10000>;
+  		};
   	};
   };
 
diff --git a/common/state/state.c b/common/state/state.c
index 02bb1bb24a..6e6b3a6f08 100644
--- a/common/state/state.c
+++ b/common/state/state.c
@@ -452,19 +452,16 @@ struct state *state_new_from_node(struct device_node *node, char *path,
 	}
 
 	if (!path) {
-		/* guess if of_path is a path, not a phandle */
-		if (of_path[0] == '/' && len > 1) {
-			ret = of_find_path(node, "backend", &path, 0);
-		} else {
-			struct device_node *partition_node;
-
-			partition_node = of_parse_phandle(node, "backend", 0);
-			if (!partition_node)
-				goto out_release_state;
-
-			of_path = partition_node->full_name;
-			ret = of_find_path_by_node(partition_node, &path, 0);
+		struct device_node *partition_node;
+
+		partition_node = of_parse_phandle(node, "backend", 0);
+		if (!partition_node) {
+			dev_err(&state->dev, "Cannot resolve \"backend\" phandle\n");
+			goto out_release_state;
 		}
+
+		of_path = partition_node->full_name;
+		ret = of_find_path_by_node(partition_node, &path, 0);
 		if (ret) {
 			if (ret != -EPROBE_DEFER)
 				dev_err(&state->dev, "state failed to parse path to backend: %s\n",
-- 
2.11.0


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

  reply	other threads:[~2017-03-31  7:04 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-31  7:03 State patches Sascha Hauer
2017-03-31  7:03 ` Sascha Hauer [this message]
2017-05-15  9:18   ` [PATCH 01/42] state: Make pointing to the backend using a phandle the only supported method Jan Remmet
2017-05-15 10:14     ` Jan Remmet
2017-05-16  5:33       ` Sascha Hauer
2017-05-17  9:13         ` Jan Remmet
2017-03-31  7:03 ` [PATCH 02/42] state: Use positive logic Sascha Hauer
2017-03-31  7:03 ` [PATCH 03/42] state: backend: remove .get_packed_len Sascha Hauer
2017-03-31  7:03 ` [PATCH 04/42] state: backend: remove len_hint argument from state_storage_read Sascha Hauer
2017-03-31  7:03 ` [PATCH 05/42] state: Drop backend as extra struct type Sascha Hauer
2017-03-31  7:03 ` [PATCH 06/42] state: merge backend.c into state.c Sascha Hauer
2017-03-31  7:03 ` [PATCH 07/42] state: open code state_backend_init in caller Sascha Hauer
2017-03-31  7:03 ` [PATCH 08/42] state: remove unnecessary argument from state_format_init Sascha Hauer
2017-03-31  7:03 ` [PATCH 09/42] state: pass struct state * to storage functions Sascha Hauer
2017-03-31  7:03 ` [PATCH 10/42] state: storage: initialize variable once outside loop Sascha Hauer
2017-03-31  7:03 ` [PATCH 11/42] state: backend_circular: Read whole PEB Sascha Hauer
2017-04-15  8:40   ` Sam Ravnborg
2017-03-31  7:03 ` [PATCH 12/42] state: drop lazy_init Sascha Hauer
2017-03-31  7:03 ` [PATCH 13/42] state: simplify direct backend Sascha Hauer
2017-03-31  7:03 ` [PATCH 14/42] state: replace len_hint logic Sascha Hauer
2017-03-31  7:03 ` [PATCH 15/42] state: Convert all bufs to void * Sascha Hauer
2017-03-31  7:03 ` [PATCH 16/42] state: Drop cache bucket Sascha Hauer
2017-04-15  8:53   ` Sam Ravnborg
2017-04-19  8:22     ` Sascha Hauer
2017-03-31  7:03 ` [PATCH 17/42] state: backend-direct: Fix max_size Sascha Hauer
2017-03-31  7:03 ` [PATCH 18/42] state: bucket: Make output more informative Sascha Hauer
2017-03-31  7:03 ` [PATCH 19/42] state: backend_bucket_direct: max_size is always given Sascha Hauer
2017-03-31  7:03 ` [PATCH 20/42] state: backend: Add more fields to struct state_backend_storage Sascha Hauer
2017-03-31  7:03 ` [PATCH 21/42] state: backend_circular: remove unnecessary warning Sascha Hauer
2017-03-31  7:03 ` [PATCH 22/42] state: storage: direct: do not close file that is not opened Sascha Hauer
2017-03-31  7:03 ` [PATCH 23/42] state: backend: Add some documentation Sascha Hauer
2017-03-31  7:03 ` [PATCH 24/42] state: backend_circular: default to circular storage Sascha Hauer
2017-03-31  7:03 ` [PATCH 25/42] state: backend_circular: rewrite function doc Sascha Hauer
2017-03-31  7:03 ` [PATCH 26/42] state: backend_storage: Rename variable nr_copies to n_buckets Sascha Hauer
2017-03-31  7:03 ` [PATCH 27/42] state: backend_storage: Rename variable desired_copies to desired_buckets Sascha Hauer
2017-03-31  7:03 ` [PATCH 28/42] state: backend_storage: rewrite function doc Sascha Hauer
2017-03-31  7:03 ` [PATCH 29/42] state: backend_storage: make locally used variable static Sascha Hauer
2017-03-31  7:03 ` [PATCH 30/42] state: backend_storage: rename more variables Sascha Hauer
2017-03-31  7:03 ` [PATCH 31/42] keystore: implement forgetting secrets Sascha Hauer
2017-03-31  7:03 ` [PATCH 32/42] commands: implement keystore command Sascha Hauer
2017-03-31  7:03 ` [PATCH 33/42] commands: state: allow loading state with -l Sascha Hauer
2017-03-31  7:03 ` [PATCH 34/42] crypto: digest: initialize earlier Sascha Hauer
2017-03-31  7:03 ` [PATCH 35/42] state: backend_raw: alloc digest only when needed Sascha Hauer
2017-03-31  7:03 ` [PATCH 36/42] state: backend_circular: Set minumum writesize to 8 Sascha Hauer
2017-03-31  7:03 ` [PATCH 37/42] state: backend bucket circular: Explain metadata Sascha Hauer
2017-03-31  7:03 ` [PATCH 38/42] state: Allow to load without authentification Sascha Hauer
2017-03-31  7:03 ` [PATCH 39/42] state: Update documentation Sascha Hauer
2017-03-31  7:03 ` [PATCH 40/42] state: Do not load state during state_new_from_node Sascha Hauer
2017-03-31  7:03 ` [PATCH 41/42] state: Remove -EUCLEAN check from userspace tool Sascha Hauer
2017-03-31  7:03 ` [PATCH 42/42] state: find device node from device path, not from device node path Sascha Hauer
2017-04-03 20:15 ` State patches Sam Ravnborg
2017-04-04  6:19   ` Sascha Hauer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170331070346.26878-2-s.hauer@pengutronix.de \
    --to=s.hauer@pengutronix.de \
    --cc=barebox@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox