Djam/arm-trusted-firmware
1
0
Fork 0
mirror of https://github.com/ARM-software/arm-trusted-firmware.git synced 2025-04-16 09:34:18 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

fix(st-clock): do not reconfigure LSE

Browse source 
If LSE oscillator is already ON, which is the case when returning from
low-power state or if we are on VBAT, it mustn't be reconfigured.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: Ie75f2b0b42aeb3d95e2266e1fca811a2f2b3e29f
This commit is contained in:
Yann Gautier 2022-03-21 11:39:33 +01:00 • committed by Yann Gautier
parent d594239d4e
commit f4a2bb986b
2 changed files with 11 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
drivers/st/clk/clk-stm32mp13.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2022-2023, STMicroelectronics - All Rights Reserved
* Copyright (C) 2022-2024, STMicroelectronics - All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
*/
@ -1007,6 +1007,11 @@ static void stm32_enable_oscillator_lse(struct stm32_clk_priv *priv)
return;
}
/* Do not reconfigure LSE if already enabled */
if (_clk_stm32_gate_is_enabled(priv, osc_data->gate_id)) {
return;
}
clk_oscillator_set_bypass(priv, _CK_LSE, digbyp, bypass);
clk_oscillator_set_drive(priv, _CK_LSE, drive);

5
drivers/st/clk/stm32mp1_clk.c
View file

@ -1327,6 +1327,11 @@ static void stm32mp1_lse_enable(bool bypass, bool digbyp, uint32_t lsedrv)
uint32_t value;
uintptr_t rcc_base = stm32mp_rcc_base();
/* Do not reconfigure LSE if it is already ON */
if ((mmio_read_32(rcc_base + RCC_BDCR) & RCC_BDCR_LSEON) == RCC_BDCR_LSEON) {
return;
}
if (digbyp) {
mmio_setbits_32(rcc_base + RCC_BDCR, RCC_BDCR_DIGBYP);
}