linux-kernel - Re: [PATCH 2/2] tpm: add driver for cr50 on SPI

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Message-ID: <20160715034444.GA28128@apronin>
Date:	Thu, 14 Jul 2016 20:44:44 -0700
From:	Andrey Pronin <apronin@...omium.org>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Peter Huewe <peterhuewe@....de>,
	Marcel Selhorst <tpmdd@...horst.net>,
	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	groeck@...omium.org, smbarber@...omium.org, dianders@...omium.org,
	Christophe Ricard <christophe.ricard@...il.com>
Subject: Re: [PATCH 2/2] tpm: add driver for cr50 on SPI

On Thu, Jul 14, 2016 at 09:32:36PM -0600, Jason Gunthorpe wrote:
> On Thu, Jul 14, 2016 at 07:20:18PM -0700, Andrey Pronin wrote:
> 
> > +static int cr50_spi_read16(struct tpm_tis_data *data, u32 addr, u16 *result)
> > +{
> > +	int rc;
> > +
> > +	rc = data->phy_ops->read_bytes(data, addr, sizeof(u16), (u8 *)result);
> > +	if (!rc)
> > +		*result = le16_to_cpu(*result);
> > +	return rc;
> > +}
> 
> I thought we had core support for this pattern?
> 
> Christophe ?
> 
> Please change this so this code isn't duplicated.
> 
> Jason
>
Hmm, didn't see the support. Would be great if there is.
The pattern itself is copied from tpm_tis_spi as is.
read_bytes/write_bytes were de-dup'ed as they used a lot of common code
(even more for this driver than for tpm_tis_spi).
But as for _readNN/_writeNN, there're only three of these functions,
so it din't seem too bad.