From 745c447579326d26a239676173854065fae1a197 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Wed, 27 May 2020 17:29:45 +0200 Subject: bcm27xx: remove linux 4.19 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Álvaro Fernández Rojas --- ...950-0089-OF-DT-Overlay-configfs-interface.patch | 427 --------------------- 1 file changed, 427 deletions(-) delete mode 100644 target/linux/bcm27xx/patches-4.19/950-0089-OF-DT-Overlay-configfs-interface.patch (limited to 'target/linux/bcm27xx/patches-4.19/950-0089-OF-DT-Overlay-configfs-interface.patch') diff --git a/target/linux/bcm27xx/patches-4.19/950-0089-OF-DT-Overlay-configfs-interface.patch b/target/linux/bcm27xx/patches-4.19/950-0089-OF-DT-Overlay-configfs-interface.patch deleted file mode 100644 index 65af09dbeb..0000000000 --- a/target/linux/bcm27xx/patches-4.19/950-0089-OF-DT-Overlay-configfs-interface.patch +++ /dev/null @@ -1,427 +0,0 @@ -From dc0f4681729e9bfe506ab8b15852363cb59bdaf5 Mon Sep 17 00:00:00 2001 -From: Pantelis Antoniou -Date: Wed, 3 Dec 2014 13:23:28 +0200 -Subject: [PATCH] OF: DT-Overlay configfs interface - -This is a port of Pantelis Antoniou's v3 port that makes use of the -new upstreamed configfs support for binary attributes. - -Original commit message: - -Add a runtime interface to using configfs for generic device tree overlay -usage. With it its possible to use device tree overlays without having -to use a per-platform overlay manager. - -Please see Documentation/devicetree/configfs-overlays.txt for more info. - -Changes since v2: -- Removed ifdef CONFIG_OF_OVERLAY (since for now it's required) -- Created a documentation entry -- Slight rewording in Kconfig - -Changes since v1: -- of_resolve() -> of_resolve_phandles(). - -Originally-signed-off-by: Pantelis Antoniou -Signed-off-by: Phil Elwell - -DT configfs: Fix build errors on other platforms - -Signed-off-by: Phil Elwell - -DT configfs: fix build error - -There is an error when compiling rpi-4.6.y branch: - CC drivers/of/configfs.o -drivers/of/configfs.c:291:21: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types] - .default_groups = of_cfs_def_groups, - ^ -drivers/of/configfs.c:291:21: note: (near initialization for 'of_cfs_subsys.su_group.default_groups.next') - -The .default_groups is linked list since commit -1ae1602de028acaa42a0f6ff18d19756f8e825c6. -This commit uses configfs_add_default_group to fix this problem. - -Signed-off-by: Slawomir Stepien - -configfs: New of_overlay API ---- - .../devicetree/configfs-overlays.txt | 31 ++ - drivers/of/Kconfig | 7 + - drivers/of/Makefile | 1 + - drivers/of/configfs.c | 310 ++++++++++++++++++ - 4 files changed, 349 insertions(+) - create mode 100644 Documentation/devicetree/configfs-overlays.txt - create mode 100644 drivers/of/configfs.c - ---- /dev/null -+++ b/Documentation/devicetree/configfs-overlays.txt -@@ -0,0 +1,31 @@ -+Howto use the configfs overlay interface. -+ -+A device-tree configfs entry is created in /config/device-tree/overlays -+and and it is manipulated using standard file system I/O. -+Note that this is a debug level interface, for use by developers and -+not necessarily something accessed by normal users due to the -+security implications of having direct access to the kernel's device tree. -+ -+* To create an overlay you mkdir the directory: -+ -+ # mkdir /config/device-tree/overlays/foo -+ -+* Either you echo the overlay firmware file to the path property file. -+ -+ # echo foo.dtbo >/config/device-tree/overlays/foo/path -+ -+* Or you cat the contents of the overlay to the dtbo file -+ -+ # cat foo.dtbo >/config/device-tree/overlays/foo/dtbo -+ -+The overlay file will be applied, and devices will be created/destroyed -+as required. -+ -+To remove it simply rmdir the directory. -+ -+ # rmdir /config/device-tree/overlays/foo -+ -+The rationalle of the dual interface (firmware & direct copy) is that each is -+better suited to different use patterns. The firmware interface is what's -+intended to be used by hardware managers in the kernel, while the copy interface -+make sense for developers (since it avoids problems with namespaces). ---- a/drivers/of/Kconfig -+++ b/drivers/of/Kconfig -@@ -108,4 +108,11 @@ config OF_DMA_DEFAULT_COHERENT - # arches should select this if DMA is coherent by default for OF devices - bool - -+config OF_CONFIGFS -+ bool "Device Tree Overlay ConfigFS interface" -+ select CONFIGFS_FS -+ select OF_OVERLAY -+ help -+ Enable a simple user-space driven DT overlay interface. -+ - endif # OF ---- a/drivers/of/Makefile -+++ b/drivers/of/Makefile -@@ -1,6 +1,7 @@ - # SPDX-License-Identifier: GPL-2.0 - obj-y = base.o device.o platform.o property.o - obj-$(CONFIG_OF_KOBJ) += kobj.o -+obj-$(CONFIG_OF_CONFIGFS) += configfs.o - obj-$(CONFIG_OF_DYNAMIC) += dynamic.o - obj-$(CONFIG_OF_FLATTREE) += fdt.o - obj-$(CONFIG_OF_EARLY_FLATTREE) += fdt_address.o ---- /dev/null -+++ b/drivers/of/configfs.c -@@ -0,0 +1,310 @@ -+/* -+ * Configfs entries for device-tree -+ * -+ * Copyright (C) 2013 - Pantelis Antoniou -+ * -+ * 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 -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+ -+#include "of_private.h" -+ -+struct cfs_overlay_item { -+ struct config_item item; -+ -+ char path[PATH_MAX]; -+ -+ const struct firmware *fw; -+ struct device_node *overlay; -+ int ov_id; -+ -+ void *dtbo; -+ int dtbo_size; -+}; -+ -+static int create_overlay(struct cfs_overlay_item *overlay, void *blob) -+{ -+ int err; -+ -+ /* unflatten the tree */ -+ of_fdt_unflatten_tree(blob, NULL, &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_phandles(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_apply(overlay->overlay, &overlay->ov_id); -+ if (err < 0) { -+ pr_err("%s: Failed to create overlay (err=%d)\n", -+ __func__, err); -+ goto out_err; -+ } -+ -+out_err: -+ return err; -+} -+ -+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; -+} -+ -+static ssize_t cfs_overlay_item_path_show(struct config_item *item, -+ char *page) -+{ -+ struct cfs_overlay_item *overlay = to_cfs_overlay_item(item); -+ return sprintf(page, "%s\n", overlay->path); -+} -+ -+static ssize_t cfs_overlay_item_path_store(struct config_item *item, -+ const char *page, size_t count) -+{ -+ struct cfs_overlay_item *overlay = to_cfs_overlay_item(item); -+ const char *p = page; -+ char *s; -+ int err; -+ -+ /* if it's set do not allow changes */ -+ if (overlay->path[0] != '\0' || overlay->dtbo_size > 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; -+ -+ err = create_overlay(overlay, (void *)overlay->fw->data); -+ if (err != 0) -+ goto out_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 config_item *item, -+ char *page) -+{ -+ struct cfs_overlay_item *overlay = to_cfs_overlay_item(item); -+ -+ return sprintf(page, "%s\n", -+ overlay->ov_id >= 0 ? "applied" : "unapplied"); -+} -+ -+CONFIGFS_ATTR(cfs_overlay_item_, path); -+CONFIGFS_ATTR_RO(cfs_overlay_item_, status); -+ -+static struct configfs_attribute *cfs_overlay_attrs[] = { -+ &cfs_overlay_item_attr_path, -+ &cfs_overlay_item_attr_status, -+ NULL, -+}; -+ -+ssize_t cfs_overlay_item_dtbo_read(struct config_item *item, -+ void *buf, size_t max_count) -+{ -+ struct cfs_overlay_item *overlay = to_cfs_overlay_item(item); -+ -+ pr_debug("%s: buf=%p max_count=%zu\n", __func__, -+ buf, max_count); -+ -+ if (overlay->dtbo == NULL) -+ return 0; -+ -+ /* copy if buffer provided */ -+ if (buf != NULL) { -+ /* the buffer must be large enough */ -+ if (overlay->dtbo_size > max_count) -+ return -ENOSPC; -+ -+ memcpy(buf, overlay->dtbo, overlay->dtbo_size); -+ } -+ -+ return overlay->dtbo_size; -+} -+ -+ssize_t cfs_overlay_item_dtbo_write(struct config_item *item, -+ const void *buf, size_t count) -+{ -+ struct cfs_overlay_item *overlay = to_cfs_overlay_item(item); -+ int err; -+ -+ /* if it's set do not allow changes */ -+ if (overlay->path[0] != '\0' || overlay->dtbo_size > 0) -+ return -EPERM; -+ -+ /* copy the contents */ -+ overlay->dtbo = kmemdup(buf, count, GFP_KERNEL); -+ if (overlay->dtbo == NULL) -+ return -ENOMEM; -+ -+ overlay->dtbo_size = count; -+ -+ err = create_overlay(overlay, overlay->dtbo); -+ if (err != 0) -+ goto out_err; -+ -+ return count; -+ -+out_err: -+ kfree(overlay->dtbo); -+ overlay->dtbo = NULL; -+ overlay->dtbo_size = 0; -+ -+ return err; -+} -+ -+CONFIGFS_BIN_ATTR(cfs_overlay_item_, dtbo, NULL, SZ_1M); -+ -+static struct configfs_bin_attribute *cfs_overlay_bin_attrs[] = { -+ &cfs_overlay_item_attr_dtbo, -+ 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_remove(&overlay->ov_id); -+ if (overlay->fw) -+ release_firmware(overlay->fw); -+ /* kfree with NULL is safe */ -+ kfree(overlay->dtbo); -+ kfree(overlay); -+} -+ -+static struct configfs_item_operations cfs_overlay_item_ops = { -+ .release = cfs_overlay_release, -+}; -+ -+static struct config_item_type cfs_overlay_type = { -+ .ct_item_ops = &cfs_overlay_item_ops, -+ .ct_attrs = cfs_overlay_attrs, -+ .ct_bin_attrs = cfs_overlay_bin_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, -+}; -+ -+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; -+ -+static struct configfs_subsystem of_cfs_subsys = { -+ .su_group = { -+ .cg_item = { -+ .ci_namebuf = "device-tree", -+ .ci_type = &of_cfs_type, -+ }, -+ }, -+ .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); -+ config_group_init_type_name(&of_cfs_overlay_group, "overlays", -+ &overlays_type); -+ configfs_add_default_group(&of_cfs_overlay_group, -+ &of_cfs_subsys.su_group); -+ -+ 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); -- cgit v1.2.3