mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
66 lines
2.3 KiB
Diff
66 lines
2.3 KiB
Diff
From f0ac5b23039610619ca4a4805528553ecb6bc815 Mon Sep 17 00:00:00 2001
|
|
From: Patrick Delaunay <patrick.delaunay@foss.st.com>
|
|
Date: Fri, 15 Dec 2023 11:15:36 +0000
|
|
Subject: [PATCH] nvmem: stm32: add support for STM32MP25 BSEC to control OTP
|
|
data
|
|
|
|
On STM32MP25, OTP area may be read/written by using BSEC (boot, security
|
|
and OTP control). The BSEC internal peripheral is only managed by the
|
|
secure world.
|
|
|
|
The 12 Kbits of OTP (effective) are organized into the following regions:
|
|
- lower OTP (OTP0 to OTP127) = 4096 lower OTP bits,
|
|
bitwise (1-bit) programmable
|
|
- mid OTP (OTP128 to OTP255) = 4096 middle OTP bits,
|
|
bulk (32-bit) programmable
|
|
- upper OTP (OTP256 to OTP383) = 4096 upper OTP bits,
|
|
bulk (32-bit) programmable,
|
|
only accessible when BSEC is in closed state.
|
|
|
|
As HWKEY and ECIES key are only accessible by ROM code;
|
|
only 368 OTP words are managed in this driver (OTP0 to OTP267).
|
|
|
|
This patch adds the STM32MP25 configuration for reading and writing
|
|
the OTP data using the OP-TEE BSEC TA services.
|
|
|
|
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
|
|
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
|
|
Link: https://lore.kernel.org/r/20231215111536.316972-11-srinivas.kandagatla@linaro.org
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
---
|
|
drivers/nvmem/stm32-romem.c | 16 ++++++++++++++++
|
|
1 file changed, 16 insertions(+)
|
|
|
|
--- a/drivers/nvmem/stm32-romem.c
|
|
+++ b/drivers/nvmem/stm32-romem.c
|
|
@@ -269,6 +269,19 @@ static const struct stm32_romem_cfg stm3
|
|
.ta = true,
|
|
};
|
|
|
|
+/*
|
|
+ * STM32MP25 BSEC OTP: 3 regions of 32-bits data words
|
|
+ * lower OTP (OTP0 to OTP127), bitwise (1-bit) programmable
|
|
+ * mid OTP (OTP128 to OTP255), bulk (32-bit) programmable
|
|
+ * upper OTP (OTP256 to OTP383), bulk (32-bit) programmable
|
|
+ * but no access to HWKEY and ECIES key: limited at OTP367
|
|
+ */
|
|
+static const struct stm32_romem_cfg stm32mp25_bsec_cfg = {
|
|
+ .size = 368 * 4,
|
|
+ .lower = 127,
|
|
+ .ta = true,
|
|
+};
|
|
+
|
|
static const struct of_device_id stm32_romem_of_match[] __maybe_unused = {
|
|
{ .compatible = "st,stm32f4-otp", }, {
|
|
.compatible = "st,stm32mp15-bsec",
|
|
@@ -276,6 +289,9 @@ static const struct of_device_id stm32_r
|
|
}, {
|
|
.compatible = "st,stm32mp13-bsec",
|
|
.data = (void *)&stm32mp13_bsec_cfg,
|
|
+ }, {
|
|
+ .compatible = "st,stm32mp25-bsec",
|
|
+ .data = (void *)&stm32mp25_bsec_cfg,
|
|
},
|
|
{ /* sentinel */ },
|
|
};
|