U-Boot is currently unable to automatically enable regulators which contain DT property regulator-always-on or regulator-boot-on. There is an ongoing work to add this functionality to regulator core code, but until the proper solution lands, add this awful workaround code to force these regulators on. This is specifically needed to assure the VIO regulator used to supply ethernet magnetics is enabled.

Signed-off-by: Marek Vasut marex@denx.de --- NOTE: This is for 2024.10 as a bad temporary workaround --- Cc: Andreas Geisreiter ageisreiter@dh-electronics.de Cc: Christoph Niedermaier cniedermaier@dh-electronics.com Cc: Fabio Estevam festevam@denx.de Cc: Tom Rini trini@konsulko.com Cc: u-boot@dh-electronics.com Cc: u-boot@lists.denx.de --- board/dhelectronics/dh_imx6/dh_imx6.c | 3 +++ board/dhelectronics/dh_imx8mp/imx8mp_dhcom_pdk2.c | 3 +++ 2 files changed, 6 insertions(+)

diff --git a/board/dhelectronics/dh_imx6/dh_imx6.c b/board/dhelectronics/dh_imx6/dh_imx6.c index c8dd30dfeaf..ada44e01424 100644 --- a/board/dhelectronics/dh_imx6/dh_imx6.c +++ b/board/dhelectronics/dh_imx6/dh_imx6.c @@ -30,6 +30,7 @@ #include <fuse.h> #include <i2c_eeprom.h> #include <mmc.h> +#include <power/regulator.h> #include <usb.h> #include <linux/delay.h> #include <usb/ehci-ci.h> @@ -127,6 +128,8 @@ int board_init(void)

setup_fec_clock();

+ regulators_enable_boot_on(_DEBUG); + return 0; }

diff --git a/board/dhelectronics/dh_imx8mp/imx8mp_dhcom_pdk2.c b/board/dhelectronics/dh_imx8mp/imx8mp_dhcom_pdk2.c index c635735d89c..a389ab3c2d9 100644 --- a/board/dhelectronics/dh_imx8mp/imx8mp_dhcom_pdk2.c +++ b/board/dhelectronics/dh_imx8mp/imx8mp_dhcom_pdk2.c @@ -14,6 +14,7 @@ #include <malloc.h> #include <net.h> #include <miiphy.h> +#include <power/regulator.h>

#include "lpddr4_timing.h" #include "../common/dh_common.h" @@ -111,6 +112,8 @@ int dh_setup_mac_address(void)

int board_init(void) { + regulators_enable_boot_on(_DEBUG); + return 0; }