During very early boot-ROM execution the pinmux configuration isi in Hi-Z state. If pull-up is enabled on GPIO pad's there will be a short period of toggle from high to low on the IO when GPIO is set low during boot. To avoid this glitch, disable pull-up configuration in GPIO pinmux.
Signed-off-by: Bhuvanchandra DV <[email protected]> --- arch/arm/include/asm/arch-vf610/iomux-vf610.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/include/asm/arch-vf610/iomux-vf610.h b/arch/arm/include/asm/arch-vf610/iomux-vf610.h index 0e2bd53..a140be0 100644 --- a/arch/arm/include/asm/arch-vf610/iomux-vf610.h +++ b/arch/arm/include/asm/arch-vf610/iomux-vf610.h @@ -34,7 +34,7 @@ PAD_CTL_PUS_22K_UP | PAD_CTL_OBE_IBE_ENABLE) #define VF610_GPIO_PAD_CTRL (PAD_CTL_SPEED_MED | PAD_CTL_DSE_50ohm | \ - PAD_CTL_PUS_47K_UP | PAD_CTL_IBE_ENABLE) + PAD_CTL_IBE_ENABLE) #define VF610_DSPI_PAD_CTRL (PAD_CTL_OBE_ENABLE | PAD_CTL_DSE_20ohm | \ PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_HIGH) -- 2.7.1 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
