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nvmem: add type attribute

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Add a type attribute so userspace is able to know how the data is stored as
this can help taking the correct decision when selecting which device to
use. This will also help program display the proper warnings when burning
fuses for example.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexandre Belloni
2018-11-30 11:53:20 +00:00
committed by Greg Kroah-Hartman
parent ecd589d8f5
commit 1668845366
2 changed files with 37 additions and 0 deletions
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16
include/linux/nvmem-provider.h
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@@ -19,6 +19,20 @@ 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);
enum nvmem_type {
NVMEM_TYPE_UNKNOWN = 0,
NVMEM_TYPE_EEPROM,
NVMEM_TYPE_OTP,
NVMEM_TYPE_BATTERY_BACKED,
};
static const char * const nvmem_type_str[] = {
[NVMEM_TYPE_UNKNOWN] = "Unknown",
[NVMEM_TYPE_EEPROM] = "EEPROM",
[NVMEM_TYPE_OTP] = "OTP",
[NVMEM_TYPE_BATTERY_BACKED] = "Battery backed",
};
/**
* struct nvmem_config - NVMEM device configuration
*
@@ -28,6 +42,7 @@ typedef int (*nvmem_reg_write_t)(void *priv, unsigned int offset,
* @owner: Pointer to exporter module. Used for refcounting.
* @cells: Optional array of pre-defined NVMEM cells.
* @ncells: Number of elements in cells.
* @type: Type of the nvmem storage
* @read_only: Device is read-only.
* @root_only: Device is accessibly to root only.
* @reg_read: Callback to read data.
@@ -51,6 +66,7 @@ struct nvmem_config {
struct module *owner;
const struct nvmem_cell_info *cells;
int ncells;
enum nvmem_type type;
bool read_only;
bool root_only;
nvmem_reg_read_t reg_read;