Re: [PATCH] ARM: dts: colibri-imx6ull: Change drive strength for usdhc2

2021-03-07 Thread Shawn Guo
On Thu, Mar 04, 2021 at 10:31:39AM +0100, Philippe Schenker wrote: > The current setting reflects about 86 Ohms of source-impedance > on the SDIO signals where the WiFi board is hooked up. PCB traces are > routed with 50 Ohms impedance and there are no serial resistors on > those traces. > > This

Re: [PATCH] ARM: dts: colibri-imx6ull: Change drive strength for usdhc2

2021-03-04 Thread Fabio Estevam
Hi Philippe, On Thu, Mar 4, 2021 at 6:31 AM Philippe Schenker wrote: > > The current setting reflects about 86 Ohms of source-impedance > on the SDIO signals where the WiFi board is hooked up. PCB traces are > routed with 50 Ohms impedance and there are no serial resistors on > those traces. > >

[PATCH] ARM: dts: colibri-imx6ull: Change drive strength for usdhc2

2021-03-04 Thread Philippe Schenker
The current setting reflects about 86 Ohms of source-impedance on the SDIO signals where the WiFi board is hooked up. PCB traces are routed with 50 Ohms impedance and there are no serial resistors on those traces. This commit changes the source-impedance to 52 Ohms to better match our hardware des