fix(st-crypto): do not set IPRST if BUSY flag is present
An issue appear when a IPRST is set when BUSY flag is still set.
Put the IP reset under condition solve this issue.
Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
Change-Id: Ibb096c1a362b8077285812e1ffca749c7fc93a03
diff --git a/drivers/st/crypto/stm32_saes.c b/drivers/st/crypto/stm32_saes.c
index f4da571..547ff89 100644
--- a/drivers/st/crypto/stm32_saes.c
+++ b/drivers/st/crypto/stm32_saes.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2022, STMicroelectronics - All Rights Reserved
+ * Copyright (c) 2022-2025, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -211,9 +211,11 @@
uint64_t timeout;
/* Reset IP */
- mmio_setbits_32(ctx->base + _SAES_CR, _SAES_CR_IPRST);
- udelay(SAES_RESET_DELAY);
- mmio_clrbits_32(ctx->base + _SAES_CR, _SAES_CR_IPRST);
+ if ((mmio_read_32(ctx->base + _SAES_SR) & _SAES_SR_BUSY) != _SAES_SR_BUSY) {
+ mmio_setbits_32(ctx->base + _SAES_CR, _SAES_CR_IPRST);
+ udelay(SAES_RESET_DELAY);
+ mmio_clrbits_32(ctx->base + _SAES_CR, _SAES_CR_IPRST);
+ }
timeout = timeout_init_us(SAES_TIMEOUT_US);
while ((mmio_read_32(ctx->base + _SAES_SR) & _SAES_SR_BUSY) == _SAES_SR_BUSY) {