Re: [PATCH 1/4][V3] spi: Add optional stall delay between cs_change transfers

From: Alexandru Ardelean
Date: Mon Jul 22 2019 - 15:28:02 EST

On Mon, Jul 22, 2019 at 8:42 PM Mark Brown <broonie@xxxxxxxxxx> wrote:
> On Mon, Jul 22, 2019 at 03:47:44PM +0300, Alexandru Ardelean wrote:
> > Some devices like the ADIS16460 IMU require a longer period between
> > transfers, i.e. between when the CS is de-asserted and re-asserted. The
> > default value of 10us is not enough. This change makes the delay
> > configurable for when the next CS change goes active, allowing the default
> > to remain 10us is case it is unspecified.
> For the third time:
> | This looks like cs_change_delay.
> > #define SPI_NBITS_QUAD 0x04 /* 4bits transfer */
> > u8 bits_per_word;
> > u8 word_delay_usecs;
> > + u8 cs_change_delay;
> > u16 delay_usecs;
> > u32 speed_hz;
> > u16 word_delay;
> This patch doesn't apply and even if it did it won't compile because you
> are trying to add a field with the same name as an existing one.

now i see;

well, my fault here;
i was basing my patchset on top of branch iio/togreg from Jonathan's
tree for the IMU:
[ typically that's the base branch for new IIO drivers ]

that one is a bit behind, and does not contain the cs_change_delay
stuff you mentioned;
also, i will admit that sometimes, some review comments are not
completely obvious to me;
i should have checked the SPI tree before opening my mouth, but this
will [hopefully] serve me as a learning experience when sending
multi-subsystem patches
when sending to a single subsystem, it's clear; when sending to 2, i
get a bit lost

i do feel a bit bad for the noise i caused, but it's not the worst
thing i did today

anyway: disregard this, and i will sync with Jonathan about how to
proceed with this patch just for IIO;

thanks for your time and sorry for the noise