diff options
Diffstat (limited to 'target/linux/generic/backport-5.10/804-v5.14-0001-nvmem-core-allow-specifying-of_node.patch')
| -rw-r--r-- | target/linux/generic/backport-5.10/804-v5.14-0001-nvmem-core-allow-specifying-of_node.patch | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/804-v5.14-0001-nvmem-core-allow-specifying-of_node.patch b/target/linux/generic/backport-5.10/804-v5.14-0001-nvmem-core-allow-specifying-of_node.patch new file mode 100644 index 0000000000..8c5a55e364 --- /dev/null +++ b/target/linux/generic/backport-5.10/804-v5.14-0001-nvmem-core-allow-specifying-of_node.patch @@ -0,0 +1,80 @@ +From 1333a6779501f4cc662ff5c8b36b0a22f3a7ddc6 Mon Sep 17 00:00:00 2001 +From: Michael Walle <michael@walle.cc> +Date: Sat, 24 Apr 2021 13:06:04 +0200 +Subject: [PATCH] nvmem: core: allow specifying of_node + +Until now, the of_node of the parent device is used. Some devices +provide more than just the nvmem provider. To avoid name space clashes, +add a way to allow specifying the nvmem cells in subnodes. Consider the +following example: + + flash@0 { + compatible = "jedec,spi-nor"; + + partitions { + compatible = "fixed-partitions"; + #address-cells = <1>; + #size-cells = <1>; + + partition@0 { + reg = <0x000000 0x010000>; + }; + }; + + otp { + compatible = "user-otp"; + #address-cells = <1>; + #size-cells = <1>; + + serial-number@0 { + reg = <0x0 0x8>; + }; + }; + }; + +There the nvmem provider might be the MTD partition or the OTP region of +the flash. + +Add a new config->of_node parameter, which if set, will be used instead +of the parent's of_node. + +Signed-off-by: Michael Walle <michael@walle.cc> +Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> +Link: https://lore.kernel.org/linux-mtd/20210424110608.15748-2-michael@walle.cc +--- + drivers/nvmem/core.c | 4 +++- + include/linux/nvmem-provider.h | 2 ++ + 2 files changed, 5 insertions(+), 1 deletion(-) + +--- a/drivers/nvmem/core.c ++++ b/drivers/nvmem/core.c +@@ -794,7 +794,9 @@ struct nvmem_device *nvmem_register(cons + nvmem->reg_write = config->reg_write; + nvmem->keepout = config->keepout; + nvmem->nkeepout = config->nkeepout; +- if (!config->no_of_node) ++ if (config->of_node) ++ nvmem->dev.of_node = config->of_node; ++ else if (!config->no_of_node) + nvmem->dev.of_node = config->dev->of_node; + + switch (config->id) { +--- a/include/linux/nvmem-provider.h ++++ b/include/linux/nvmem-provider.h +@@ -57,6 +57,7 @@ struct nvmem_keepout { + * @type: Type of the nvmem storage + * @read_only: Device is read-only. + * @root_only: Device is accessibly to root only. ++ * @of_node: If given, this will be used instead of the parent's of_node. + * @no_of_node: Device should not use the parent's of_node even if it's !NULL. + * @reg_read: Callback to read data. + * @reg_write: Callback to write data. +@@ -86,6 +87,7 @@ struct nvmem_config { + enum nvmem_type type; + bool read_only; + bool root_only; ++ struct device_node *of_node; + bool no_of_node; + nvmem_reg_read_t reg_read; + nvmem_reg_write_t reg_write; |