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arm: stm32mp: bsec: Update OTP shadow registers in SPL 

Currently the upper OTP (after 57) are shadowed in U-Boot proper,
when TFABOOT is not used.

This choice cause an issue when U-Boot is not executed after SPL,
so this BSEC initialization is moved in SPL and no more executed in U-Boot,
so it is still executed only one time.

After this patch this BSEC initialization is done in FSBL: SPL or TF-A.

To force this initialization in all the case, the probe of the BSEC
driver is forced in SPL in the arch st32mp function: spl_board_init().

Even if today BSEC driver is already probed in STM32MP15x clock driver
clk_stm32mp1.c because get_cpu_type() is called in
stm32mp1_get_max_opp_freq() function.

Reported-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
This commit is contained in:
Patrick Delaunay 2021-10-11 09:52:48 +02:00 committed by Patrice Chotard
parent 819408d001
commit 9788708f03
2 changed files with 10 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/mach-stm32mp/bsec.c
View File

@ -503,10 +503,9 @@ static int stm32mp_bsec_probe(struct udevice *dev)
/*
* update unlocked shadow for OTP cleared by the rom code
* only executed in U-Boot proper when TF-A is not used
* only executed in SPL, it is done in TF-A for TFABOOT
*/
if (!IS_ENABLED(CONFIG_TFABOOT) && !IS_ENABLED(CONFIG_SPL_BUILD)) {
if (IS_ENABLED(CONFIG_SPL_BUILD)) {
plat = dev_get_plat(dev);
for (otp = 57; otp <= BSEC_OTP_MAX_VALUE; otp++)

8
arch/arm/mach-stm32mp/cpu.c
View File

@ -174,7 +174,15 @@ static void dbgmcu_init(void)
void spl_board_init(void)
{
struct udevice *dev;
int ret;
dbgmcu_init();
/* force probe of BSEC driver to shadow the upper OTP */
ret = uclass_get_device_by_driver(UCLASS_MISC, DM_DRIVER_GET(stm32mp_bsec), &dev);
if (ret)
log_warning("BSEC probe failed: %d\n", ret);
}
#endif /* !defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD) */