| Message ID | 1456302804-3059-1-git-send-email-bhuvanchandra.dv@toradex.com |
|---|---|
| State | Accepted |
| Commit | fc9e8f2817d8024f2c1e0e13c80111a9fa4bbce9 |
| Delegated to: | Stefano Babic |
| Headers | show |
On 24/02/2016 09:33, Bhuvanchandra DV wrote: > 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 <bhuvanchandra.dv@toradex.com> > --- > 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) > As fix, applied to u-boot-imx, thanks ! Best regards, Stefano Babic
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)
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 <bhuvanchandra.dv@toradex.com> --- arch/arm/include/asm/arch-vf610/iomux-vf610.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)