linux-kernel - Re: [PATCH v1 1/1] mfd: intel-lpss: Provide an SSP type to the SPI driver

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Date:   Wed, 13 Jul 2022 19:08:32 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/1] mfd: intel-lpss: Provide an SSP type to the SPI
 driver

On Wed, Jul 13, 2022 at 02:12:27PM +0100, Lee Jones wrote:
> On Wed, 13 Jul 2022, Andy Shevchenko wrote:
> > On Wed, Jul 13, 2022 at 09:10:06AM +0100, Lee Jones wrote:
> > > On Sun, 03 Jul 2022, Andy Shevchenko wrote:

...

> > > > +static const struct property_entry spt_spi_properties[] = {
> > > > +	PROPERTY_ENTRY_U32("intel,spi-pxa2xx-type", LPSS_SPT_SSP),
> > > > +	{ }
> > > > +};
> > > > +
> > > > +static const struct software_node spt_spi_node = {
> > > > +	.properties = spt_spi_properties,
> > > > +};
> > > > +
> > > >  static const struct intel_lpss_platform_info spt_info = {
> > > >  	.clk_rate = 120000000,
> > > > +	.swnode = &spt_spi_node,
> > > >  };
> > > 
> > > IMHO, this is a rubbish interface.
> > > 
> > > The amount of 10-line changes required to store a 32-bit value is
> > > depressing.  Is there not a reduced interface for storing small pieces
> > > of data that doesn't require arrays of structs?
> > 
> > The part of it that makes it longer because of differentiating the hardware,
> > but see the difference here:
> > 
> > In this change:
> > 	95 insertions(+), 46 deletions(-)
> > 
> > In the follow up SPI driver cleaning (not yet submitted):
> > 	14 insertions(+), 121 deletions(-)
> 
> Not sure we are understanding each other.
> 
> The patch is fine.  I'm referring to the software_node interface.

Ah, I see, sorry for the confusion.

-- 
With Best Regards,
Andy Shevchenko