I tried changing it as follows:
- mcasp0_aclkx.spi1_sclk: RXACTIVE=0 (Receiver disabled)
- Disabled pullups on mcasp0_aclkx.spi1_sclk, mcasp0_axr0.spi1_d1, and
mcasp0_ahclkr.spi1_cs0
So the relevant section in the BB-SPI1-01-00A0.dts file now looks like:
pinctrl-single,pins = <
0x190 0x0b /* mcasp0_aclkx.spi1_sclk, Pull-down disabled | MODE3 */
0x194 0x33 /* mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
0x198 0x1b /* mcasp0_axr0.spi1_d1, Pull-up disabled | MODE3 */
0x19c 0x1b /* mcasp0_ahclkr.spi1_cs0, Pull-up disabled | MODE3 */
And everything seems to work fine (note that I'm currently not able to test
reading from SPI).
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