On 5/17/20 9:30 PM, David Miller wrote:
> From: Andrew Lunn
> Date: Sun, 17 May 2020 21:16:35 +0200
>
>>> Nevertheless I was going to repeat the performance measurements on a
>>> recent kernel but haven't gotten around to that yet because the
>>> measurements need to be performed with CONFIG_PREE
On 5/17/20 9:26 PM, Andrew Lunn wrote:
>> So I was already led into reworking the entire series to do this
>> inlining once, after V1. It then turned out it's a horrible mess to get
>> everything to compile as modules and built-in and then also only the
>> parallel/SPI as a module and then the othe
From: Andrew Lunn
Date: Sun, 17 May 2020 21:16:35 +0200
>> Nevertheless I was going to repeat the performance measurements on a
>> recent kernel but haven't gotten around to that yet because the
>> measurements need to be performed with CONFIG_PREEMPT_RT_FULL to
>> be reliable (a vanilla kernel i
> So I was already led into reworking the entire series to do this
> inlining once, after V1. It then turned out it's a horrible mess to get
> everything to compile as modules and built-in and then also only the
> parallel/SPI as a module and then the other way around.
Maybe consider some trade of
> However in terms of performance there's a bigger problem:
>
> Previously ks8851.c (SPI driver) had 8-bit and 32-bit register accessors.
> The present series drops them and performs a 32-bit access as two 16-bit
> accesses and an 8-bit access as one 16-bit access because that's what
> ks8851_mll.
On 5/17/20 9:13 AM, Lukas Wunner wrote:
> On Sat, May 16, 2020 at 07:02:25PM -0700, David Miller wrote:
>>> The KS8851SNL/SNLI and KS8851-16MLL/MLLI/MLLU are very much the same pieces
>>> of silicon, except the former has an SPI interface, while the later has a
>>> parallel bus interface. Thus far,
On Sat, May 16, 2020 at 07:02:25PM -0700, David Miller wrote:
> > The KS8851SNL/SNLI and KS8851-16MLL/MLLI/MLLU are very much the same pieces
> > of silicon, except the former has an SPI interface, while the later has a
> > parallel bus interface. Thus far, Linux has two separate drivers for each
>
On 5/17/20 4:02 AM, David Miller wrote:
> From: Marek Vasut
> Date: Sun, 17 May 2020 02:33:34 +0200
>
>> The KS8851SNL/SNLI and KS8851-16MLL/MLLI/MLLU are very much the same pieces
>> of silicon, except the former has an SPI interface, while the later has a
>> parallel bus interface. Thus far, Li
From: Marek Vasut
Date: Sun, 17 May 2020 02:33:34 +0200
> The KS8851SNL/SNLI and KS8851-16MLL/MLLI/MLLU are very much the same pieces
> of silicon, except the former has an SPI interface, while the later has a
> parallel bus interface. Thus far, Linux has two separate drivers for each
> and they
The KS8851SNL/SNLI and KS8851-16MLL/MLLI/MLLU are very much the same pieces
of silicon, except the former has an SPI interface, while the later has a
parallel bus interface. Thus far, Linux has two separate drivers for each
and they are diverging considerably.
This series unifies them into a singl
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