From 5d8e6e6c10a3d37486d263b16ddc15991a7e4a88 Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Mon, 6 Feb 2023 13:43:46 +0000 Subject: nvmem: core: add an index parameter to the cell Sometimes a cell can represend multiple values. For example, a base ethernet address stored in the NVMEM can be expanded into multiple discreet ones by adding an offset. For this use case, introduce an index parameter which is then used to distiguish between values. This parameter will then be passed to the post process hook which can then use it to create different values during reading. At the moment, there is only support for the device tree path. You can add the index to the phandle, e.g. &net { nvmem-cells = <&base_mac_address 2>; nvmem-cell-names = "mac-address"; }; &nvmem_provider { base_mac_address: base-mac-address@0 { #nvmem-cell-cells = <1>; reg = <0 6>; }; }; Signed-off-by: Michael Walle Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20230206134356.839737-13-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman --- include/linux/nvmem-provider.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/linux/nvmem-provider.h') diff --git a/include/linux/nvmem-provider.h b/include/linux/nvmem-provider.h index bb15c9234e21..55181d837969 100644 --- a/include/linux/nvmem-provider.h +++ b/include/linux/nvmem-provider.h @@ -20,8 +20,8 @@ typedef int (*nvmem_reg_read_t)(void *priv, unsigned int offset, typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset, void *val, size_t bytes); /* used for vendor specific post processing of cell data */ -typedef int (*nvmem_cell_post_process_t)(void *priv, const char *id, unsigned int offset, - void *buf, size_t bytes); +typedef int (*nvmem_cell_post_process_t)(void *priv, const char *id, int index, + unsigned int offset, void *buf, size_t bytes); enum nvmem_type { NVMEM_TYPE_UNKNOWN = 0, -- cgit