| Message ID | 20210216212638.28382-3-ansuelsmth@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Implement nvmem support for mtd | expand |
On 16.02.2021 22:26, Ansuel Smith wrote: > Partitions that contains the nvmem-partitions compatible will register > their direct subonodes as nvmem cells and the node will be treated as a > nvmem provider. > > Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> Tested-by: Rafał Miłecki <rafal@milecki.pl> I applied this patch on top of the: [PATCH] mtd: parsers: ofpart: limit parsing of deprecated DT syntax I succesfully used NVMEM cell defined in bootloader mtd partition for reading device MAC address. partitions { compatible = "fixed-partitions"; #address-cells = <1>; #size-cells = <1>; partition@0 { compatible = "nvmem-partitions"; label = "bootloader"; reg = <0x0 0x100000>; #address-cells = <1>; #size-cells = <1>; ranges = <0 0x0 0x100000>; base_mac_addr: mac@106a0 { reg = <0x106a0 0x6>; }; }; }
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 2d6423d89a17..29d257678a86 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -531,6 +531,7 @@ static int mtd_nvmem_reg_read(void *priv, unsigned int offset, static int mtd_nvmem_add(struct mtd_info *mtd) { + struct device_node *node = mtd_get_of_node(mtd); struct nvmem_config config = {}; config.id = -1; @@ -543,7 +544,7 @@ static int mtd_nvmem_add(struct mtd_info *mtd) config.stride = 1; config.read_only = true; config.root_only = true; - config.no_of_node = true; + config.no_of_node = !of_device_is_compatible(node, "nvmem-partitions"); config.priv = mtd; mtd->nvmem = nvmem_register(&config);
Partitions that contains the nvmem-partitions compatible will register their direct subonodes as nvmem cells and the node will be treated as a nvmem provider. Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com> --- drivers/mtd/mtdcore.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)