Hi,
On Tue, Mar 09, 2021 at 09:58:09AM +0530, Viresh Kumar wrote:
> On 08-03-21, 16:54, Alexandru Ardelean wrote:
> > The intent is the removal of the 'delay_usecs' field from the
> > spi_transfer struct, as there is a 'delay' field that does the same
> > thing.
> >
> > The spi_delay_to_ns() can be used to get the transfer delay. It works by
> > using the 'delay_usecs' field first (if it is non-zero), and finally
> > uses the 'delay' field.
> >
> > Since the 'delay_usecs' field is going away, this change makes use of the
> > spi_delay_to_ns() function. This also means dividing the return value of
> > the function by 1000, to convert it to microseconds.
> > To prevent any potential faults when converting to microseconds and since
> > the result of spi_delay_to_ns() is int, the delay is being computed in 32
> > bits and then clamped between 0 & U16_MAX.
> >
> > Signed-off-by: Alexandru Ardelean <aardelean@xxxxxxxxxxx>
> > ---
> > drivers/staging/greybus/spilib.c | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/staging/greybus/spilib.c b/drivers/staging/greybus/spilib.c
> > index 672d540d3365..30655153df6a 100644
> > --- a/drivers/staging/greybus/spilib.c
> > +++ b/drivers/staging/greybus/spilib.c
> > @@ -245,6 +245,7 @@ static struct gb_operation *gb_spi_operation_create(struct gb_spilib *spi,
> > /* Fill in the transfers array */
> > xfer = spi->first_xfer;
> > while (msg->state != GB_SPI_STATE_OP_DONE) {
> > + int xfer_delay;
> > if (xfer == spi->last_xfer)
> > xfer_len = spi->last_xfer_size;
> > else
> > @@ -259,7 +260,9 @@ static struct gb_operation *gb_spi_operation_create(struct gb_spilib *spi,
> >
> > gb_xfer->speed_hz = cpu_to_le32(xfer->speed_hz);
> > gb_xfer->len = cpu_to_le32(xfer_len);
> > - gb_xfer->delay_usecs = cpu_to_le16(xfer->delay_usecs);
> > + xfer_delay = spi_delay_to_ns(&xfer->delay, xfer) / 1000;
> > + xfer_delay = clamp_t(u16, xfer_delay, 0, U16_MAX);
> > + gb_xfer->delay_usecs = cpu_to_le16(xfer_delay);
> > gb_xfer->cs_change = xfer->cs_change;
> > gb_xfer->bits_per_word = xfer->bits_per_word;
>
> Acked-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Acked-by: Rui Miguel Silva <rmfrfs@xxxxxxxxx>
------
Cheers,
Rui
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