Re: [PATCH] stm32mp1: add pull-up for gpio button PA13 and PA14

2021-07-27 Thread Patrick DELAUNAY
Hi, On 7/9/21 9:53 AM, Patrick Delaunay wrote: When a push-button is released and PA13/PA14 are defined as input (high-Z) the LED should not be active as the circuit is open but a small current leak through PCB or push-button close the circuit and allows a small LED bias giving erroneous level v

Re: [PATCH] stm32mp1: add pull-up for gpio button PA13 and PA14

2021-07-09 Thread Patrice CHOTARD
Hi Patrick On 7/9/21 9:53 AM, Patrick Delaunay wrote: > When a push-button is released and PA13/PA14 are defined as input (high-Z) > the LED should not be active as the circuit is open but a small current > leak through PCB or push-button close the circuit and allows a small LED > bias giving erro

[PATCH] stm32mp1: add pull-up for gpio button PA13 and PA14

2021-07-09 Thread Patrick Delaunay
When a push-button is released and PA13/PA14 are defined as input (high-Z) the LED should not be active as the circuit is open but a small current leak through PCB or push-button close the circuit and allows a small LED bias giving erroneous level voltage. So it is recommended to activate an inter