Re: rn5t618 vs. rn5t568

[Juergen Borleis <jbe@pengutronix.de>]

Hi,

Am Donnerstag, dem 27.04.2023 um 09:36 +0200 schrieb Sascha Hauer:
> On Wed, Apr 26, 2023 at 09:09:36PM +0200, Andreas Kemnade wrote:
> > Hi,
> > 
> > just looked a bit around in the source and stumbled across drivers/mfd/rn5t568.c
> > 
> > It contains
> >  * MFD core driver for Ricoh RN5T618 PMIC
> > 
> > but the filename is rn5t568.c That is very confusing.
> >  a compatible ricoh,rn5t568 (but 567) does not exist in the kernel.

567 and 568 are pin compatible. As far as I know the 568 has some fixed OTP
settings which are used after reset. Depending on the type extension (C, S, AD…)
the I²C address differs and the default output voltages.

> > So which chip this is really about? Did not analyse things deeper yet.
> > 
> > I am also curious because I wrote most stuff in the kernel about the rn5t618/rc5t619.
> 
> Jürgen had to support the rn5t568 which is not yet supported in Linux.
> He took the Kernel rn5t618.c driver and adjusted it accordingly. Jürgen
> can't remember exactly, but he said the chips are quite similar.

Due to the support of the 567 variant it is already supported in the kernel.

jb

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