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2 Commits

Author SHA1 Message Date
Fabrice Gasnier
7c1cd8fda8 nvmem: stm32: add support for STM32MP15 BSEC to control OTP data 
On STM32MP15, OTP area may be read/written by using BSEC (boot, security
and OTP control). BSEC registers set is composed of various regions, among
which control registers and OTP shadow registers.
Secure monitor calls are involved in this process to allow (or deny)
access to the full range of OTP data.
This adds support for reading and writing OTP data using SMC services.
Data content can be aligned on 16-bits or 8-bits. Then take care of it,
since BSEC data is 32-bits wide.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2019-04-25 19:43:12 +02:00
Fabrice Gasnier
ded1b7fc2c nvmem: Add driver for STM32 factory-programmed read only mem 
Add a read only nvmem driver for STM32 factory-programmed memory area
(on-chip non-volatile storage).

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2019-04-25 19:43:12 +02:00