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

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Message-ID: <Ys6lFqm4/T/Kb3et@smile.fi.intel.com>
Date:   Wed, 13 Jul 2022 13:57:26 +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 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(-)


-- 
With Best Regards,
Andy Shevchenko