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-rw-r--r--recipes-kernel/linux/linux-at91-4.9.87/v5-3-9-OF-DT-Overlay-configfs-interface.diff287
1 files changed, 0 insertions, 287 deletions
diff --git a/recipes-kernel/linux/linux-at91-4.9.87/v5-3-9-OF-DT-Overlay-configfs-interface.diff b/recipes-kernel/linux/linux-at91-4.9.87/v5-3-9-OF-DT-Overlay-configfs-interface.diff
deleted file mode 100644
index 619b888..0000000
--- a/recipes-kernel/linux/linux-at91-4.9.87/v5-3-9-OF-DT-Overlay-configfs-interface.diff
+++ /dev/null
@@ -1,287 +0,0 @@
-Patch from:
-https://lore.kernel.org/patchwork/patch/468129/
-
-This patch will not compile with the 4.9.87 kernel.
-
-ConfigFS overlay
-==================================================================================
-diff -aNru linux-4.9.87.orig/drivers/of/Kconfig linux-4.9.87/drivers/of/Kconfig
---- linux-4.9.87.orig/drivers/of/Kconfig 2018-12-05 10:47:45.348494186 -0600
-+++ linux-4.9.87/drivers/of/Kconfig 2018-12-05 11:05:10.272463251 -0600
-@@ -112,4 +112,11 @@
- config OF_NUMA
- bool
-
-+config OF_CONFIGFS
-+ bool "OpenFirmware Overlay ConfigFS interface"
-+ select CONFIGFS_FS
-+ select OF_OVERLAY
-+ help
-+ Enable a simple user-space driver DT overlay interface.
-+
- endif # OF
-diff -aNru linux-4.9.87.orig/drivers/of/Makefile linux-4.9.87/drivers/of/Makefile
---- linux-4.9.87.orig/drivers/of/Makefile 2018-12-05 10:48:27.836492928 -0600
-+++ linux-4.9.87/drivers/of/Makefile 2018-12-05 11:05:57.668461848 -0600
-@@ -14,5 +14,6 @@
- obj-$(CONFIG_OF_RESOLVE) += resolver.o
- obj-$(CONFIG_OF_OVERLAY) += overlay.o
- obj-$(CONFIG_OF_NUMA) += of_numa.o
-+obj-$(CONFIG_OF_CONFIGFS) += configfs.o
-
- obj-$(CONFIG_OF_UNITTEST) += unittest-data/
-diff -aNru linux-4.9.87.orig/drivers/of/configfs.c linux-4.9.87/drivers/of/configfs.c
---- linux-4.9.87.orig/drivers/of/configfs.c 1969-12-31 18:00:00.000000000 -0600
-+++ linux-4.9.87/drivers/of/configfs.c 2018-12-05 10:58:59.056474241 -0600
-@@ -0,0 +1,251 @@
-+/*
-+ * Configfs entries for device-tree
-+ *
-+ * Copyright (C) 2013 - Pantelis Antoniou <panto@antoniou-consulting.com>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * as published by the Free Software Foundation; either version
-+ * 2 of the License, or (at your option) any later version.
-+ */
-+#include <linux/ctype.h>
-+#include <linux/cpu.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_fdt.h>
-+#include <linux/spinlock.h>
-+#include <linux/slab.h>
-+#include <linux/proc_fs.h>
-+#include <linux/configfs.h>
-+#include <linux/types.h>
-+#include <linux/stat.h>
-+#include <linux/limits.h>
-+#include <linux/file.h>
-+#include <linux/vmalloc.h>
-+#include <linux/firmware.h>
-+
-+#include "of_private.h"
-+
-+#ifdef CONFIG_OF_OVERLAY
-+
-+struct cfs_overlay_item {
-+ struct config_item item;
-+
-+ char path[PATH_MAX];
-+
-+ const struct firmware *fw;
-+ struct device_node *overlay;
-+ int ov_id;
-+};
-+
-+static inline struct cfs_overlay_item *to_cfs_overlay_item(
-+ struct config_item *item)
-+{
-+ return item ? container_of(item, struct cfs_overlay_item, item) : NULL;
-+}
-+
-+CONFIGFS_ATTR_STRUCT(cfs_overlay_item);
-+#define CFS_OVERLAY_ITEM_ATTR(_name, _mode, _show, _store) \
-+struct cfs_overlay_item_attribute cfs_overlay_item_attr_##_name = \
-+ __CONFIGFS_ATTR(_name, _mode, _show, _store)
-+#define CFS_OVERLAY_ITEM_ATTR_RO(_name, _show) \
-+struct cfs_overlay_item_attribute cfs_overlay_item_attr_##_name = \
-+ __CONFIGFS_ATTR_RO(_name, _show)
-+
-+static ssize_t cfs_overlay_item_path_show(struct cfs_overlay_item *overlay,
-+ char *page)
-+{
-+ return sprintf(page, "%s\n", overlay->path);
-+}
-+
-+static ssize_t cfs_overlay_item_path_store(struct cfs_overlay_item *overlay,
-+ const char *page, size_t count)
-+{
-+ const char *p = page;
-+ char *s;
-+ int err;
-+
-+ /* if it's set do not allow changes */
-+ if (overlay->path[0] != '\0')
-+ return -EPERM;
-+
-+ /* copy to path buffer (and make sure it's always zero terminated */
-+ count = snprintf(overlay->path, sizeof(overlay->path) - 1, "%s", p);
-+ overlay->path[sizeof(overlay->path) - 1] = '\0';
-+
-+ /* strip trailing newlines */
-+ s = overlay->path + strlen(overlay->path);
-+ while (s > overlay->path && *--s == '\n')
-+ *s = '\0';
-+
-+ pr_debug("%s: path is '%s'\n", __func__, overlay->path);
-+
-+ err = request_firmware(&overlay->fw, overlay->path, NULL);
-+ if (err != 0)
-+ goto out_err;
-+
-+ /* unflatten the tree */
-+ of_fdt_unflatten_tree((void *)overlay->fw->data, &overlay->overlay);
-+ if (overlay->overlay == NULL) {
-+ pr_err("%s: failed to unflatten tree\n", __func__);
-+ err = -EINVAL;
-+ goto out_err;
-+ }
-+ pr_debug("%s: unflattened OK\n", __func__);
-+
-+ /* mark it as detached */
-+ of_node_set_flag(overlay->overlay, OF_DETACHED);
-+
-+ /* perform resolution */
-+ err = of_resolve(overlay->overlay);
-+ if (err != 0) {
-+ pr_err("%s: Failed to resolve tree\n", __func__);
-+ goto out_err;
-+ }
-+ pr_debug("%s: resolved OK\n", __func__);
-+
-+ err = of_overlay_create(overlay->overlay);
-+ if (err < 0) {
-+ pr_err("%s: Failed to create overlay (err=%d)\n",
-+ __func__, err);
-+ goto out_err;
-+ }
-+ overlay->ov_id = err;
-+
-+ return count;
-+
-+out_err:
-+
-+ release_firmware(overlay->fw);
-+ overlay->fw = NULL;
-+
-+ overlay->path[0] = '\0';
-+ return err;
-+}
-+
-+static ssize_t cfs_overlay_item_status_show(struct cfs_overlay_item *overlay,
-+ char *page)
-+{
-+ return sprintf(page, "%s\n",
-+ overlay->ov_id >= 0 ? "applied" : "unapplied");
-+}
-+
-+CFS_OVERLAY_ITEM_ATTR(path, S_IRUGO | S_IWUSR,
-+ cfs_overlay_item_path_show, cfs_overlay_item_path_store);
-+CFS_OVERLAY_ITEM_ATTR_RO(status, cfs_overlay_item_status_show);
-+
-+static struct configfs_attribute *cfs_overlay_attrs[] = {
-+ &cfs_overlay_item_attr_path.attr,
-+ &cfs_overlay_item_attr_status.attr,
-+ NULL,
-+};
-+
-+static void cfs_overlay_release(struct config_item *item)
-+{
-+ struct cfs_overlay_item *overlay = to_cfs_overlay_item(item);
-+
-+ if (overlay->ov_id >= 0)
-+ of_overlay_destroy(overlay->ov_id);
-+ if (overlay->fw)
-+ release_firmware(overlay->fw);
-+ kfree(overlay);
-+}
-+
-+CONFIGFS_ATTR_OPS(cfs_overlay_item);
-+static struct configfs_item_operations cfs_overlay_item_ops = {
-+ .release = cfs_overlay_release,
-+ .show_attribute = cfs_overlay_item_attr_show,
-+ .store_attribute = cfs_overlay_item_attr_store,
-+};
-+
-+static struct config_item_type cfs_overlay_type = {
-+ .ct_item_ops = &cfs_overlay_item_ops,
-+ .ct_attrs = cfs_overlay_attrs,
-+ .ct_owner = THIS_MODULE,
-+};
-+
-+static struct config_item *cfs_overlay_group_make_item(
-+ struct config_group *group, const char *name)
-+{
-+ struct cfs_overlay_item *overlay;
-+
-+ overlay = kzalloc(sizeof(*overlay), GFP_KERNEL);
-+ if (!overlay)
-+ return ERR_PTR(-ENOMEM);
-+ overlay->ov_id = -1;
-+
-+ config_item_init_type_name(&overlay->item, name, &cfs_overlay_type);
-+ return &overlay->item;
-+}
-+
-+static void cfs_overlay_group_drop_item(struct config_group *group,
-+ struct config_item *item)
-+{
-+ struct cfs_overlay_item *overlay = to_cfs_overlay_item(item);
-+
-+ config_item_put(&overlay->item);
-+}
-+
-+static struct configfs_group_operations overlays_ops = {
-+ .make_item = cfs_overlay_group_make_item,
-+ .drop_item = cfs_overlay_group_drop_item,
-+};
-+
-+static struct config_item_type overlays_type = {
-+ .ct_group_ops = &overlays_ops,
-+ .ct_owner = THIS_MODULE,
-+};
-+
-+#endif /* CONFIG_OF_OVERLAY */
-+
-+static struct configfs_group_operations of_cfs_ops = {
-+ /* empty - we don't allow anything to be created */
-+};
-+
-+static struct config_item_type of_cfs_type = {
-+ .ct_group_ops = &of_cfs_ops,
-+ .ct_owner = THIS_MODULE,
-+};
-+
-+struct config_group of_cfs_overlay_group;
-+
-+struct config_group *of_cfs_def_groups[] = {
-+#ifdef CONFIG_OF_OVERLAY
-+ &of_cfs_overlay_group,
-+#endif
-+ NULL
-+};
-+
-+static struct configfs_subsystem of_cfs_subsys = {
-+ .su_group = {
-+ .cg_item = {
-+ .ci_namebuf = "device-tree",
-+ .ci_type = &of_cfs_type,
-+ },
-+ .default_groups = of_cfs_def_groups,
-+ },
-+ .su_mutex = __MUTEX_INITIALIZER(of_cfs_subsys.su_mutex),
-+};
-+
-+static int __init of_cfs_init(void)
-+{
-+ int ret;
-+
-+ pr_info("%s\n", __func__);
-+
-+ config_group_init(&of_cfs_subsys.su_group);
-+#ifdef CONFIG_OF_OVERLAY
-+ config_group_init_type_name(&of_cfs_overlay_group, "overlays",
-+ &overlays_type);
-+#endif
-+
-+ ret = configfs_register_subsystem(&of_cfs_subsys);
-+ if (ret != 0) {
-+ pr_err("%s: failed to register subsys\n", __func__);
-+ goto out;
-+ }
-+ pr_info("%s: OK\n", __func__);
-+out:
-+ return ret;
-+}
-+late_initcall(of_cfs_init);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 21:19:39 +0000