Need to enable MCP23S08 I/O expanders to manage Ethernet PHY
reset in STM32MP135F-DK board.
Put this config in built-in like STMMAC to avoid huge of Ethernet
messages during boot (deferred)

Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
---
 arch/arm/configs/multi_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 86bf057ac3663..9758f3d41ad70 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -469,6 +469,7 @@ CONFIG_SPI_XILINX=y
 CONFIG_SPI_SPIDEV=y
 CONFIG_SPMI=y
 CONFIG_PINCTRL_AS3722=y
+CONFIG_PINCTRL_MCP23S08=y
 CONFIG_PINCTRL_MICROCHIP_SGPIO=y
 CONFIG_PINCTRL_OCELOT=y
 CONFIG_PINCTRL_PALMAS=y
-- 
2.25.1

On 6/4/24 4:35 PM, Christophe Roullier wrote:
> Need to enable MCP23S08 I/O expanders to manage Ethernet PHY
> reset in STM32MP135F-DK board.
> Put this config in built-in like STMMAC to avoid huge of Ethernet
> messages during boot (deferred)

You're not avoiding any error/defer/messages here, you simply need to 
enable the MCP23S08 GPIO controller driver, so the kernel can use the 
GPIO provided by that driver instance to release the ethernet PHY from 
reset on STM32MP135F-DK, that's all.