linux-kernel - Re: [PATCH 3/5] gpio: aspeed-sgpio: Create llops to handle hardware access

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Message-ID: <bb5bdcf2-6bd3-49c7-b3e5-210b7f332137@lunn.ch>
Date: Mon, 19 Jan 2026 15:20:39 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Billy Tsai <billy_tsai@...eedtech.com>
Cc: Linus Walleij <linusw@...nel.org>,
	Bartosz Golaszewski <brgl@...nel.org>,
	Joel Stanley <joel@....id.au>,
	Andrew Jeffery <andrew@...econstruct.com.au>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-aspeed@...ts.ozlabs.org" <linux-aspeed@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Andrew Jeffery <andrew@...id.au>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	BMC-SW <BMC-SW@...eedtech.com>
Subject: Re: [PATCH 3/5] gpio: aspeed-sgpio: Create llops to handle hardware
 access

> We did consider regmap. However, llops is intended to abstract not only
> register
> 
> access but also layout-specific bit mapping, which is difficult to express
> 
> cleanly with a flat regmap interface.

O.K. I was just thinking, if you can swap to regmap, you could maybe
then go one step further and use gpio_regmap_register(). But if you
have extra logic in here, that will not work.

     Andrew