From 4efa0b70d54f1b1129051656628be452578f3fa4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Wed, 17 Aug 2022 20:44:52 +0200 Subject: kernel: backport U-Boot environment data NVMEM driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It parses U-Boot env data into NVMEM cells. Signed-off-by: Rafał Miłecki (cherry picked from commit 34cf31043504473df3174a22d163b71b75e46542) --- ...etting-MTD-device-associated-with-a-speci.patch | 72 ++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 target/linux/generic/backport-5.10/414-v6.1-mtd-allow-getting-MTD-device-associated-with-a-speci.patch (limited to 'target/linux/generic/backport-5.10/414-v6.1-mtd-allow-getting-MTD-device-associated-with-a-speci.patch') diff --git a/target/linux/generic/backport-5.10/414-v6.1-mtd-allow-getting-MTD-device-associated-with-a-speci.patch b/target/linux/generic/backport-5.10/414-v6.1-mtd-allow-getting-MTD-device-associated-with-a-speci.patch new file mode 100644 index 0000000000..adb8b2ddd8 --- /dev/null +++ b/target/linux/generic/backport-5.10/414-v6.1-mtd-allow-getting-MTD-device-associated-with-a-speci.patch @@ -0,0 +1,72 @@ +From b0321721be50b80c03a51866a94fde4f94690e18 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= +Date: Wed, 15 Jun 2022 21:42:59 +0200 +Subject: [PATCH] mtd: allow getting MTD device associated with a specific DT + node +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +MTD subsystem API allows interacting with MTD devices (e.g. reading, +writing, handling bad blocks). So far a random driver could get MTD +device only by its name (get_mtd_device_nm()). This change allows +getting them also by a DT node. + +This API is required for drivers handling DT defined MTD partitions in a +specific way (e.g. U-Boot (sub)partition with environment variables). + +Signed-off-by: Rafał Miłecki +Acked-by: Miquel Raynal +Signed-off-by: Srinivas Kandagatla +--- + drivers/mtd/mtdcore.c | 28 ++++++++++++++++++++++++++++ + include/linux/mtd/mtd.h | 1 + + 2 files changed, 29 insertions(+) + +--- a/drivers/mtd/mtdcore.c ++++ b/drivers/mtd/mtdcore.c +@@ -1009,6 +1009,34 @@ int __get_mtd_device(struct mtd_info *mt + EXPORT_SYMBOL_GPL(__get_mtd_device); + + /** ++ * of_get_mtd_device_by_node - obtain an MTD device associated with a given node ++ * ++ * @np: device tree node ++ */ ++struct mtd_info *of_get_mtd_device_by_node(struct device_node *np) ++{ ++ struct mtd_info *mtd = NULL; ++ struct mtd_info *tmp; ++ int err; ++ ++ mutex_lock(&mtd_table_mutex); ++ ++ err = -EPROBE_DEFER; ++ mtd_for_each_device(tmp) { ++ if (mtd_get_of_node(tmp) == np) { ++ mtd = tmp; ++ err = __get_mtd_device(mtd); ++ break; ++ } ++ } ++ ++ mutex_unlock(&mtd_table_mutex); ++ ++ return err ? ERR_PTR(err) : mtd; ++} ++EXPORT_SYMBOL_GPL(of_get_mtd_device_by_node); ++ ++/** + * get_mtd_device_nm - obtain a validated handle for an MTD device by + * device name + * @name: MTD device name to open +--- a/include/linux/mtd/mtd.h ++++ b/include/linux/mtd/mtd.h +@@ -675,6 +675,7 @@ extern int mtd_device_unregister(struct + extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num); + extern int __get_mtd_device(struct mtd_info *mtd); + extern void __put_mtd_device(struct mtd_info *mtd); ++extern struct mtd_info *of_get_mtd_device_by_node(struct device_node *np); + extern struct mtd_info *get_mtd_device_nm(const char *name); + extern void put_mtd_device(struct mtd_info *mtd); + -- cgit v1.2.3