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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 10/17] overlay: Add of_overlay_apply_file()
Date: Wed, 23 Jun 2021 07:16:25 +0200	[thread overview]
Message-ID: <20210623051632.30253-11-s.hauer@pengutronix.de> (raw)
In-Reply-To: <20210623051632.30253-1-s.hauer@pengutronix.de>

A shortcut to of_overlay_apply_tree() which takes a filename rather than
an unflattened device tree.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/of/overlay.c | 35 +++++++++++++++++++++++++++++++++++
 include/of.h         |  7 +++++++
 2 files changed, 42 insertions(+)

diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index d7738c08a0..754af0f57f 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -14,6 +14,8 @@
 #include <globalvar.h>
 #include <magicvar.h>
 #include <string.h>
+#include <libfile.h>
+#include <fs.h>
 
 static struct device_node *find_target(struct device_node *root,
 				       struct device_node *fragment)
@@ -227,6 +229,39 @@ int of_overlay_apply_tree(struct device_node *root,
 	return err;
 }
 
+int of_overlay_apply_file(struct device_node *root, const char *filename)
+{
+	void *fdt;
+	struct device_node *ovl;
+	size_t size;
+	int ret;
+
+	ret = read_file_2(filename, &size, &fdt, FILESIZE_MAX);
+	if (ret)
+		return ret;
+
+	ovl = of_unflatten_dtb(fdt, size);
+
+	free(fdt);
+
+	if (IS_ERR(ovl)) {
+		pr_err("Failed to unflatten %s: %pe\n", filename, ovl);
+		return PTR_ERR(ovl);
+	}
+
+	ret = of_overlay_apply_tree(root, ovl);
+	if (ret == -ENODEV)
+		pr_debug("Not applied %s (not compatible)\n", filename);
+	else if (ret)
+		pr_err("Cannot apply %s: %s\n", filename, strerror(-ret));
+	else
+		pr_info("Applied %s\n", filename);
+
+	of_delete_node(ovl);
+
+	return ret;
+}
+
 static int of_overlay_fixup(struct device_node *root, void *data)
 {
 	struct device_node *overlay = data;
diff --git a/include/of.h b/include/of.h
index cdf01d5b4d..c58d8de600 100644
--- a/include/of.h
+++ b/include/of.h
@@ -1026,6 +1026,7 @@ struct device_node *of_resolve_phandles(struct device_node *root,
 					const struct device_node *overlay);
 int of_overlay_apply_tree(struct device_node *root,
 			  struct device_node *overlay);
+int of_overlay_apply_file(struct device_node *root, const char *filename);
 int of_register_overlay(struct device_node *overlay);
 int of_process_overlay(struct device_node *root,
 		    struct device_node *overlay,
@@ -1047,6 +1048,12 @@ static inline int of_overlay_apply_tree(struct device_node *root,
 	return -ENOSYS;
 }
 
+static inline int of_overlay_apply_file(struct device_node *root,
+					const char *filename)
+{
+	return -ENOSYS;
+}
+
 static inline int of_register_overlay(struct device_node *overlay)
 {
 	return -ENOSYS;
-- 
2.29.2


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  parent reply	other threads:[~2021-06-23  5:19 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-23  5:16 [PATCH v2 00/17] Apply device tree overlays to kernel tree Sascha Hauer
2021-06-23  5:16 ` [PATCH 01/17] fdt: Check blob size during unflattening Sascha Hauer
2021-06-23  5:16 ` [PATCH 02/17] firmware: make device_node argument non const Sascha Hauer
2021-06-23  5:16 ` [PATCH 03/17] libbb: Add find_path function Sascha Hauer
2021-06-23  5:16 ` [PATCH 04/17] firmware: consolidate ifdefs Sascha Hauer
2021-06-23  5:16 ` [PATCH 05/17] firmware: Add search path Sascha Hauer
2021-06-23  5:16 ` [PATCH 06/17] firmware: Fix device_node matching Sascha Hauer
2021-06-23  5:16 ` [PATCH 07/17] firmware: recognize by reproducible name Sascha Hauer
2021-06-23  5:16 ` [PATCH 08/17] blspec: Set firmware searchpath Sascha Hauer
2021-06-23  5:16 ` [PATCH 09/17] overlay: only apply compatible trees Sascha Hauer
2021-06-23  5:16 ` Sascha Hauer [this message]
2021-06-23  5:16 ` [PATCH 11/17] firmware: Load from global search path Sascha Hauer
2021-06-23  5:16 ` [PATCH 12/17] blspec: Rework firmware load Sascha Hauer
2021-06-23  5:16 ` [PATCH 13/17] of_overlay: apply overlays during booting Sascha Hauer
2021-06-23  5:16 ` [PATCH 14/17] blspec: Apply overlays from rootfs Sascha Hauer
2021-06-23  5:16 ` [PATCH 15/17] doc: devicetree: Refer to internal device tree also as live tree Sascha Hauer
2021-06-23  5:16 ` [PATCH 16/17] Documentation: Add documentation for device tree overlays Sascha Hauer
2021-06-23  6:13   ` Ahmad Fatoum
2021-06-23 19:37     ` Trent Piepho
2021-06-24  8:48       ` Sascha Hauer
2021-06-23  5:16 ` [PATCH 17/17] of_firmware: Fix handling of firmware-name property Sascha Hauer
  -- strict thread matches above, loose matches on Subject: below --
2021-03-10 13:28 [PATCH 00/17] Apply device tree overlays to kernel tree Sascha Hauer
2021-03-10 13:28 ` [PATCH 10/17] overlay: Add of_overlay_apply_file() Sascha Hauer

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