On Sat, May 23, 2020 at 09:35:06AM +0800, dillon min wrote:
> - if (ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX)) {
> + if ((ctlr->flags & (SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX))
> &&
> + !(msg->spi->mode & SPI_3WIRE)) {
> ma
On Fri, May 22, 2020 at 10:57 PM dillon min wrote:
>
> hi Mark,
>
> Thanks for reviewing.
>
> On Fri, May 22, 2020 at 7:36 PM Mark Brown wrote:
> >
> > On Mon, May 18, 2020 at 07:09:20PM +0800, dillon.min...@gmail.com wrote:
> >
> > > 2, use stm32 spi's "In full-duplex (BIDIMODE=0 and RXONLY=0)",
hi Mark,
Thanks for reviewing.
On Fri, May 22, 2020 at 7:36 PM Mark Brown wrote:
>
> On Mon, May 18, 2020 at 07:09:20PM +0800, dillon.min...@gmail.com wrote:
>
> > 2, use stm32 spi's "In full-duplex (BIDIMODE=0 and RXONLY=0)", as tx_buf is
> > null, we must add dummy data sent out before read da
On Sat, May 23, 2020 at 12:29 AM Mark Brown wrote:
>
> On Fri, May 22, 2020 at 11:59:25PM +0800, dillon min wrote:
>
> > but, after spi-core create a dummy tx_buf or rx_buf, then i can't get
> > the correct spi_3wire direction.
> > actually, this dummy tx_buf is useless for SPI_3WIRE. it's has mea
On Fri, May 22, 2020 at 11:59:25PM +0800, dillon min wrote:
> but, after spi-core create a dummy tx_buf or rx_buf, then i can't get
> the correct spi_3wire direction.
> actually, this dummy tx_buf is useless for SPI_3WIRE. it's has meaning
> for SPI_SIMPLE_RX mode,
> simulate SPI_FULL_DUMPLEX
Oh,
On Mon, May 18, 2020 at 07:09:20PM +0800, dillon.min...@gmail.com wrote:
> 2, use stm32 spi's "In full-duplex (BIDIMODE=0 and RXONLY=0)", as tx_buf is
> null, we must add dummy data sent out before read data.
> so, add stm32f4_spi_tx_dummy() to handle this situation.
There are flags SPI_CONTROLLE
From: dillon min
in l3gd20 driver startup, there is a setup failed error return from
stm32 spi driver
"
[2.687630] st-gyro-spi spi0.0: supply vdd not found, using dummy
regulator
[2.696869] st-gyro-spi spi0.0: supply vddio not found, using dummy
regulator
[2.7
