From: Rafał Miłecki Date: Mon, 7 Nov 2022 18:24:48 +0000 (+0100) Subject: kernel: backport support for "linux,rootfs" in DT X-Git-Tag: v22.03.3~151 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=932378aeb6fa38c922f1d9fdc5791b611594fa05;p=openwrt%2Fstaging%2Fhauke.git kernel: backport support for "linux,rootfs" in DT This DT property allows marking flash partition that Linux should use as a root device. It's useful for devices that don't use U-Boot and cmdline parser for partitioning. It may be used with "fixed-partitions" or some dynamic partitioning based on flash content. Signed-off-by: Rafał Miłecki (cherry picked from commit d33e49857e3ad76586ebe55334996b15cd45ca1b) --- diff --git a/target/linux/ath79/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch b/target/linux/ath79/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch index 27f84c097b..c9e928acb2 100644 --- a/target/linux/ath79/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch +++ b/target/linux/ath79/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch @@ -34,7 +34,7 @@ Signed-off-by: Abhimanyu Vishwakarma mtd->type = MTD_NORFLASH; --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -843,6 +843,17 @@ out_error: +@@ -848,6 +848,17 @@ out_error: */ static void mtd_set_dev_defaults(struct mtd_info *mtd) { diff --git a/target/linux/generic/backport-5.10/418-v6.2-mtd-core-set-ROOT_DEV-for-partitions-marked-as-rootf.patch b/target/linux/generic/backport-5.10/418-v6.2-mtd-core-set-ROOT_DEV-for-partitions-marked-as-rootf.patch new file mode 100644 index 0000000000..ac5b438e6d --- /dev/null +++ b/target/linux/generic/backport-5.10/418-v6.2-mtd-core-set-ROOT_DEV-for-partitions-marked-as-rootf.patch @@ -0,0 +1,47 @@ +From 26422ac78e9d8767bd4aabfbae616b15edbf6a1b Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Sat, 22 Oct 2022 23:13:18 +0200 +Subject: [PATCH] mtd: core: set ROOT_DEV for partitions marked as rootfs in DT +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This adds support for "linux,rootfs" binding that is used to mark flash +partition containing rootfs. It's useful for devices using device tree +that don't have bootloader passing root info in cmdline. + +Signed-off-by: Rafał Miłecki +Signed-off-by: Miquel Raynal +Link: https://lore.kernel.org/linux-mtd/20221022211318.32009-2-zajec5@gmail.com +--- + drivers/mtd/mtdcore.c | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -28,6 +28,7 @@ + #include + #include + #include ++#include + + #include + #include +@@ -743,6 +744,17 @@ int add_mtd_device(struct mtd_info *mtd) + not->add(mtd); + + mutex_unlock(&mtd_table_mutex); ++ ++ if (of_find_property(mtd_get_of_node(mtd), "linux,rootfs", NULL)) { ++ if (IS_BUILTIN(CONFIG_MTD)) { ++ pr_info("mtd: setting mtd%d (%s) as root device\n", mtd->index, mtd->name); ++ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, mtd->index); ++ } else { ++ pr_warn("mtd: can't set mtd%d (%s) as root device - mtd must be builtin\n", ++ mtd->index, mtd->name); ++ } ++ } ++ + /* We _know_ we aren't being removed, because + our caller is still holding us here. So none + of this try_ nonsense, and no bitching about it diff --git a/target/linux/generic/hack-5.10/402-mtd-blktrans-call-add-disks-after-mtd-device.patch b/target/linux/generic/hack-5.10/402-mtd-blktrans-call-add-disks-after-mtd-device.patch index a650320cd0..dc342da831 100644 --- a/target/linux/generic/hack-5.10/402-mtd-blktrans-call-add-disks-after-mtd-device.patch +++ b/target/linux/generic/hack-5.10/402-mtd-blktrans-call-add-disks-after-mtd-device.patch @@ -69,7 +69,7 @@ Signed-off-by: Daniel Golle unsigned long flags; --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -31,6 +31,7 @@ +@@ -32,6 +32,7 @@ #include #include @@ -77,7 +77,7 @@ Signed-off-by: Daniel Golle #include "mtdcore.h" -@@ -916,6 +917,8 @@ int mtd_device_parse_register(struct mtd +@@ -928,6 +929,8 @@ int mtd_device_parse_register(struct mtd register_reboot_notifier(&mtd->reboot_notifier); } diff --git a/target/linux/generic/hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch b/target/linux/generic/hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch deleted file mode 100644 index a70d8af4c2..0000000000 --- a/target/linux/generic/hack-5.10/420-mtd-set-rootfs-to-be-root-dev.patch +++ /dev/null @@ -1,39 +0,0 @@ -From: Gabor Juhos -Subject: kernel/3.1[02]: move MTD root device setup code to mtdcore - -The current code only allows to automatically set -root device on MTD partitions. Move the code to MTD -core to allow to use it with all MTD devices. - -Signed-off-by: Gabor Juhos ---- - drivers/mtd/mtdcore.c | 10 ++++++++++ - 1 file changed, 10 insertions(+) - ---- a/drivers/mtd/mtdcore.c -+++ b/drivers/mtd/mtdcore.c -@@ -27,6 +27,7 @@ - #include - #include - #include -+#include - #include - - #include -@@ -759,6 +760,16 @@ int add_mtd_device(struct mtd_info *mtd) - of this try_ nonsense, and no bitching about it - either. :) */ - __module_get(THIS_MODULE); -+ -+ if (!strcmp(mtd->name, "rootfs") && -+ IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) && -+ ROOT_DEV == 0) { -+ unsigned int index = mtd->index; -+ pr_notice("mtd: device %d (%s) set to be root filesystem\n", -+ mtd->index, mtd->name); -+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index); -+ } -+ - return 0; - - fail_nvmem_add: diff --git a/target/linux/generic/hack-5.10/420-mtd-support-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch b/target/linux/generic/hack-5.10/420-mtd-support-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch new file mode 100644 index 0000000000..89ac3cb9fe --- /dev/null +++ b/target/linux/generic/hack-5.10/420-mtd-support-OpenWrt-s-MTD_ROOTFS_ROOT_DEV.patch @@ -0,0 +1,24 @@ +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Mon, 7 Nov 2022 23:48:24 +0100 +Subject: [PATCH] mtd: support OpenWrt's MTD_ROOTFS_ROOT_DEV +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This allows setting ROOT_DEV to MTD partition named "rootfs". + +Signed-off-by: Rafał Miłecki +--- + +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -756,7 +756,8 @@ int add_mtd_device(struct mtd_info *mtd) + + mutex_unlock(&mtd_table_mutex); + +- if (of_find_property(mtd_get_of_node(mtd), "linux,rootfs", NULL)) { ++ if (of_find_property(mtd_get_of_node(mtd), "linux,rootfs", NULL) || ++ (IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) && !strcmp(mtd->name, "rootfs") && ROOT_DEV == 0)) { + if (IS_BUILTIN(CONFIG_MTD)) { + pr_info("mtd: setting mtd%d (%s) as root device\n", mtd->index, mtd->name); + ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, mtd->index); diff --git a/target/linux/generic/hack-5.10/421-mtd-fix-squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch b/target/linux/generic/hack-5.10/421-mtd-fix-squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch index 2f7da2aaba..1cd0efd624 100644 --- a/target/linux/generic/hack-5.10/421-mtd-fix-squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch +++ b/target/linux/generic/hack-5.10/421-mtd-fix-squashfs-root-on-targets-with-CONFIG_FIT_PAR.patch @@ -7,13 +7,25 @@ Fix assumption about the block device index --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -767,6 +767,9 @@ int add_mtd_device(struct mtd_info *mtd) - unsigned int index = mtd->index; - pr_notice("mtd: device %d (%s) set to be root filesystem\n", - mtd->index, mtd->name); +@@ -758,12 +758,18 @@ int add_mtd_device(struct mtd_info *mtd) + + if (of_find_property(mtd_get_of_node(mtd), "linux,rootfs", NULL) || + (IS_ENABLED(CONFIG_MTD_ROOTFS_ROOT_DEV) && !strcmp(mtd->name, "rootfs") && ROOT_DEV == 0)) { ++ unsigned int index = mtd->index; ++ +#ifdef CONFIG_FIT_PARTITION + index <<= 2; +#endif - ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index); ++ + if (IS_BUILTIN(CONFIG_MTD)) { +- pr_info("mtd: setting mtd%d (%s) as root device\n", mtd->index, mtd->name); +- ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, mtd->index); ++ pr_info("mtd: setting mtd%d (%s) as root device\n", index, mtd->name); ++ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, index); + } else { + pr_warn("mtd: can't set mtd%d (%s) as root device - mtd must be builtin\n", +- mtd->index, mtd->name); ++ index, mtd->name); + } } diff --git a/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch b/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch index 53d5637e41..498876ef2f 100644 --- a/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch +++ b/target/linux/generic/pending-5.10/402-mtd-spi-nor-write-support-for-minor-aligned-partitions.patch @@ -80,7 +80,7 @@ Reported-by: Dan Carpenter --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -163,6 +163,15 @@ static ssize_t mtd_erasesize_show(struct +@@ -164,6 +164,15 @@ static ssize_t mtd_erasesize_show(struct } static DEVICE_ATTR(erasesize, S_IRUGO, mtd_erasesize_show, NULL); @@ -96,7 +96,7 @@ Reported-by: Dan Carpenter static ssize_t mtd_writesize_show(struct device *dev, struct device_attribute *attr, char *buf) { -@@ -312,6 +321,7 @@ static struct attribute *mtd_attrs[] = { +@@ -313,6 +322,7 @@ static struct attribute *mtd_attrs[] = { &dev_attr_flags.attr, &dev_attr_size.attr, &dev_attr_erasesize.attr, diff --git a/target/linux/generic/pending-5.10/495-mtd-core-add-get_mtd_device_by_node.patch b/target/linux/generic/pending-5.10/495-mtd-core-add-get_mtd_device_by_node.patch index 8b40caa1fe..ac770b1394 100644 --- a/target/linux/generic/pending-5.10/495-mtd-core-add-get_mtd_device_by_node.patch +++ b/target/linux/generic/pending-5.10/495-mtd-core-add-get_mtd_device_by_node.patch @@ -17,7 +17,7 @@ Reviewed-by: Miquel Raynal --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -1139,6 +1139,44 @@ out_unlock: +@@ -1151,6 +1151,44 @@ out_unlock: } EXPORT_SYMBOL_GPL(get_mtd_device_nm); diff --git a/target/linux/pistachio/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch b/target/linux/pistachio/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch index 27f84c097b..c9e928acb2 100644 --- a/target/linux/pistachio/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch +++ b/target/linux/pistachio/patches-5.10/401-mtd-nor-support-mtd-name-from-device-tree.patch @@ -34,7 +34,7 @@ Signed-off-by: Abhimanyu Vishwakarma mtd->type = MTD_NORFLASH; --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c -@@ -843,6 +843,17 @@ out_error: +@@ -848,6 +848,17 @@ out_error: */ static void mtd_set_dev_defaults(struct mtd_info *mtd) {