linux-kernel - Re: [PATCH 4/4] counter: 104-quad-8: Utilize helper functions to handle PR, FLAG and PSC

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Date:   Mon, 20 Mar 2023 18:54:16 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     William Breathitt Gray <william.gray@...aro.org>
Cc:     linux-iio@...r.kernel.org, Johannes Berg <johannes.berg@...el.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] counter: 104-quad-8: Utilize helper functions to
 handle PR, FLAG and PSC

On Mon, Mar 20, 2023 at 11:53:36AM -0400, William Breathitt Gray wrote:
> On Mon, Mar 20, 2023 at 05:36:17PM +0200, Andy Shevchenko wrote:

...

> After reading through the implementation for these functions I realized
> they are actually doing something different than what's happening here.
> The 104-QUAD-8 device exposes the 24-bit register by consecutive 8-bit
> I/O operations on the same address; however, the iomap_copy and regmap
> bulk functions operate on different addresses.

Ah, than we have ioreadXX_rep()/iowriteXX_rep() for that.

> I'm not sure if there really is a way to make the 104-QUAD-8 operation
> more generic for other drivers because it configures the current byte
> pointer through a separate register from the data register (all of this
> feel rather device specific), so I suspect keeping this function local
> to 104-quad-8 is best for now.

-- 
With Best Regards,
Andy Shevchenko