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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* OP-TEE STM32MP BSEC PTA interface, used by STM32 ROMEM driver
*
* Copyright (C) 2022, STMicroelectronics - All Rights Reserved
*/
#if IS_ENABLED(CONFIG_NVMEM_STM32_BSEC_OPTEE_TA)
/**
* stm32_bsec_optee_ta_open() - initialize the STM32 BSEC TA
* @ctx: the OP-TEE context on success
*
* Return:
* On success, 0. On failure, -errno.
*/
int stm32_bsec_optee_ta_open(struct tee_context **ctx);
/**
* stm32_bsec_optee_ta_close() - release the STM32 BSEC TA
* @ctx: the OP-TEE context
*
* This function used to clean the OP-TEE resources initialized in
* stm32_bsec_optee_ta_open(); it can be used as callback to
* devm_add_action_or_reset()
*/
void stm32_bsec_optee_ta_close(void *ctx);
/**
* stm32_bsec_optee_ta_read() - nvmem read access using TA client driver
* @ctx: the OP-TEE context provided by stm32_bsec_optee_ta_open
* @offset: nvmem offset
* @buf: buffer to fill with nvem values
* @bytes: number of bytes to read
*
* Return:
* On success, 0. On failure, -errno.
*/
int stm32_bsec_optee_ta_read(struct tee_context *ctx, unsigned int offset,
void *buf, size_t bytes);
/**
* stm32_bsec_optee_ta_write() - nvmem write access using TA client driver
* @ctx: the OP-TEE context provided by stm32_bsec_optee_ta_open
* @lower: number of lower OTP, not protected by ECC
* @offset: nvmem offset
* @buf: buffer with nvem values
* @bytes: number of bytes to write
*
* Return:
* On success, 0. On failure, -errno.
*/
int stm32_bsec_optee_ta_write(struct tee_context *ctx, unsigned int lower,
unsigned int offset, void *buf, size_t bytes);
#else
static inline int stm32_bsec_optee_ta_open(struct tee_context **ctx)
{
return -EOPNOTSUPP;
}
static inline void stm32_bsec_optee_ta_close(void *ctx)
{
}
static inline int stm32_bsec_optee_ta_read(struct tee_context *ctx,
unsigned int offset, void *buf,
size_t bytes)
{
return -EOPNOTSUPP;
}
static inline int stm32_bsec_optee_ta_write(struct tee_context *ctx,
unsigned int lower,
unsigned int offset, void *buf,
size_t bytes)
{
return -EOPNOTSUPP;
}
#endif /* CONFIG_NVMEM_STM32_BSEC_OPTEE_TA */
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