Re: [RESEND PATCH v16 mfd 1/8] mfd: ocelot: add helper to get regmap from a resource

From: Lee Jones <lee@kernel.org>
To: Colin Foster <colin.foster@in-advantage.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	devicetree@vger.kernel.org, Terry Bowman <terry.bowman@amd.com>,
	Vladimir Oltean <vladimir.oltean@nxp.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>,
	UNGLinuxDriver@microchip.com,
	Steen Hegelund <Steen.Hegelund@microchip.com>,
	Lars Povlsen <lars.povlsen@microchip.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	Paolo Abeni <pabeni@redhat.com>, Jakub Kicinski <kuba@kernel.org>,
	Eric Dumazet <edumazet@google.com>,
	"David S. Miller" <davem@davemloft.net>,
	Russell King <linux@armlinux.org.uk>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	katie.morris@in-advantage.com
Subject: Re: [RESEND PATCH v16 mfd 1/8] mfd: ocelot: add helper to get regmap from a resource
Date: Thu, 8 Sep 2022 10:40:48 +0100	[thread overview]
Message-ID: <Yxm4oMq8dpsFg61b@google.com> (raw)
In-Reply-To: <20220905162132.2943088-2-colin.foster@in-advantage.com>

On Mon, 05 Sep 2022, Colin Foster wrote:

> Several ocelot-related modules are designed for MMIO / regmaps. As such,
> they often use a combination of devm_platform_get_and_ioremap_resource()
> and devm_regmap_init_mmio().
> 
> Operating in an MFD might be different, in that it could be memory mapped,
> or it could be SPI, I2C... In these cases a fallback to use IORESOURCE_REG
> instead of IORESOURCE_MEM becomes necessary.
> 
> When this happens, there's redundant logic that needs to be implemented in
> every driver. In order to avoid this redundancy, utilize a single function
> that, if the MFD scenario is enabled, will perform this fallback logic.
> 
> Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> ---
> v16
>     * Add Andy Reviewed-by tag
> 
> v15
>     * Add missed errno.h and ioport.h includes
>     * Add () to function references in both the commit log and comments
> 
> v14
>     * Add header guard
>     * Change regs type from u32* to void*
>     * Add Reviewed-by tag
> 
> ---
>  MAINTAINERS                |  5 +++
>  include/linux/mfd/ocelot.h | 62 ++++++++++++++++++++++++++++++++++++++
>  2 files changed, 67 insertions(+)
>  create mode 100644 include/linux/mfd/ocelot.h

Applied, thanks.

-- 
Lee Jones [李琼斯]

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