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- From 1333a6779501f4cc662ff5c8b36b0a22f3a7ddc6 Mon Sep 17 00:00:00 2001
- From: Michael Walle <[email protected]>
- 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 <[email protected]>
- Acked-by: Srinivas Kandagatla <[email protected]>
- Signed-off-by: Miquel Raynal <[email protected]>
- Link: https://lore.kernel.org/linux-mtd/[email protected]
- ---
- 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
- @@ -795,7 +795,9 @@ 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.
- @@ -87,6 +88,7 @@ struct nvmem_config {
- enum nvmem_type type;
- bool read_only;
- bool root_only;
- + struct device_node *of_node;
- bool ignore_wp;
- bool no_of_node;
- nvmem_reg_read_t reg_read;
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