Hi Fabio, On 24/01/2018 at 18:21, Fabio Estevam wrote: > On Wed, Jan 24, 2018 at 3:12 PM, Michael Nazzareno Trimarchi > <mich...@amarulasolutions.com> wrote: > >> From the datasheet I have: >> >> Software Input On Field. Force the selected mux mode Input path no >> matter of MUX_MODE functionality. >> 1: Force input path of pad A14. >> 0: Input Path is determined by functionality of the selected mux mode >> (regular). >> >> So i think that in case of some peripheral this is not relevant but I >> need confirmation > > Looking at arch/arm/boot/dts/imx25-pinfunc.h I see that there is only > one pin that sets the SION bit in the common pin definition: > > /* > * Removing the SION bit from MX25_PAD_SD1_CMD__SD1_CMD breaks detecting an SD > * card. According to the i.MX25 reference manual (e.g. Figure 23-2 in IMX25RM > * Rev. 2 from 01/2011) this pin is bidirectional. So it seems to be a silicon > * bug that configuring the SD1_CMD function doesn't enable the input path for > * this pin. > * This might have side effects for other hardware units that are connected to > * that pin and use the respective function as input. > */ > #define MX25_PAD_SD1_CMD__SD1_CMD 0x190 0x388 0x000 0x10 0x000
In mainline Linux, SION is also set by some DTS files (MX25_PAD_* 0x40000000 flag) for FEC MDIO and SD CMD/CLK/DATAn. Best regards, Benoît _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
