linux-kernel - Re: [PATCH v6 2/8] mfd: simple-mfd-i2c: specify max

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Message-ID: <20250702162620.GA10134@google.com>
Date: Wed, 2 Jul 2025 17:26:20 +0100
From: Lee Jones <lee@...nel.org>
To: Alex Elder <elder@...cstar.com>
Cc: lgirdwood@...il.com, broonie@...nel.org, alexandre.belloni@...tlin.com,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	mat.jonczyk@...pl, dlan@...too.org, paul.walmsley@...ive.com,
	palmer@...belt.com, aou@...s.berkeley.edu, alex@...ti.fr,
	troymitchell988@...il.com, guodong@...cstar.com,
	linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org, spacemit@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 2/8] mfd: simple-mfd-i2c: specify max_register

On Wed, 02 Jul 2025, Alex Elder wrote:

> On 7/2/25 10:26 AM, Lee Jones wrote:
> > On Fri, 27 Jun 2025, Alex Elder wrote:
> > 
> > > All devices supported by simple MFD use the same 8-bit register
> > > 8-bit value regmap configuration.  There is an option available
> > > for a device to specify a custome configuration, but no existing
> > > device uses it.
> > > 
> > > Lee Jones suggested modifying the simple MFD implementation to
> > > remove the generality of the full regmap configuration and add a
> > > max_register value to the simple_mfd_data structure.  This can
> > > be used in the regmap configuration to limit the valid register
> > > addresses if desired.  It's simpler, and covers all existing and
> > > anticipated device types.
> > 
> > Woah, not like this.  I wanted to make the framework _more_ flexible.
> 
> OK, sorry I misunderstood.  I'll send another new version today
> that does what you suggest.

No worries.  Perhaps I wasn't clear enough.

-- 
Lee Jones [李琼斯]