Re: [PATCH 4.19 106/140] iio: ad7949: kill pointless "readback"-handling code

Andrea Merello
2019-12-16T18:31:50Z

Something nasty seems happening here: it looks like the commit message
and the actual diff have nothing to do one wrt the other; the commit
message is from one of my patches, the diff is against some unrelated
file.

Il giorno lun 16 dic 2019 alle ore 19:05 Greg Kroah-Hartman
<gregkh@linuxfoundation.org> ha scritto:
>
> From: Meng Li <Meng.Li@windriver.com>
>
> [ Upstream commit c270bbf7bb9ddc4e2a51b3c56557c377c9ac79bc ]
>
> The device could be configured to spit out also the configuration word
> while reading the AD result value (in the same SPI xfer) - this is called
> "readback" in the device datasheet.
>
> The driver checks if readback is enabled and it eventually adjusts the SPI
> xfer length and it applies proper shifts to still get the data, discarding
> the configuration word.
>
> The readback option is actually never enabled (the driver disables it), so
> the said checks do not serve for any purpose.
>
> Since enabling the readback option seems not to provide any advantage (the
> driver entirely sets the configuration word without relying on any default
> value), just kill the said, unused, code.
>
> Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
> Reviewed-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Signed-off-by: Sasha Levin <sashal@kernel.org>
> ---
> drivers/edac/altera_edac.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/edac/altera_edac.c b/drivers/edac/altera_edac.c
> index 56de378ad13dc..c9108906bcdc0 100644
> --- a/drivers/edac/altera_edac.c
> +++ b/drivers/edac/altera_edac.c
> @@ -600,6 +600,7 @@ static const struct regmap_config s10_sdram_regmap_cfg = {
> .reg_read = s10_protected_reg_read,
> .reg_write = s10_protected_reg_write,
> .use_single_rw = true,
> + .fast_io = true,
> };
>
> static int altr_s10_sdram_probe(struct platform_device *pdev)
> --
> 2.20.1
>
>
>