linux-kernel - Re: [PATCH v3 1/6] mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

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Date:   Wed, 2 Jun 2021 11:49:04 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Robert Marko <robert.marko@...tura.hr>
Cc:     linux-kernel@...r.kernel.org, linus.walleij@...aro.org,
        bgolaszewski@...libre.com, linux-gpio@...r.kernel.org,
        p.zabel@...gutronix.de, robh+dt@...nel.org,
        devicetree@...r.kernel.org, luka.perkov@...tura.hr,
        jmp@...phyte.org, pmenzel@...gen.mpg.de, buczek@...gen.mpg.de
Subject: Re: [PATCH v3 1/6] mfd: simple-mfd-i2c: Add Delta TN48M CPLD support

On Mon, 31 May 2021, Robert Marko wrote:
65;6200;1c
> Delta TN48M switches have a Lattice CPLD that serves
> multiple purposes including being a GPIO expander.
> 
> So, lets use the simple I2C MFD driver to provide the MFD core.
> 
> Also add a virtual symbol which pulls in the simple-mfd-i2c driver and
> provide a common symbol on which the subdevice drivers can depend on.
> 
> Signed-off-by: Robert Marko <robert.marko@...tura.hr>
> ---
> Changes in v2:
> * Drop the custom MFD driver and header
> * Use simple I2C MFD driver
> 
>  drivers/mfd/Kconfig          | 10 ++++++++++
>  drivers/mfd/simple-mfd-i2c.c |  1 +
>  2 files changed, 11 insertions(+)
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index b74efa469e90..2b5ad314125d 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -297,6 +297,16 @@ config MFD_ASIC3
>  	  This driver supports the ASIC3 multifunction chip found on many
>  	  PDAs (mainly iPAQ and HTC based ones)
>  
> +config MFD_TN48M_CPLD
> +	tristate "Delta Networks TN48M switch CPLD driver"
> +	depends on I2C
> +	select MFD_SIMPLE_MFD_I2C
> +	help
> +	  Select this option to enable support for Delta Networks TN48M switch
> +	  CPLD. It consists of MFD and GPIO drivers. CPLD provides GPIOS-s

Not entirely sure what MFD means in this context.

Please replace the MFD mention with Reset.

> +	  for the SFP slots as well as power supply related information.
> +	  SFP support depends on the GPIO driver being selected.
> +
>  config PMIC_DA903X
>  	bool "Dialog Semiconductor DA9030/DA9034 PMIC Support"
>  	depends on I2C=y
> diff --git a/drivers/mfd/simple-mfd-i2c.c b/drivers/mfd/simple-mfd-i2c.c
> index 87f684cff9a1..af8e91781417 100644
> --- a/drivers/mfd/simple-mfd-i2c.c
> +++ b/drivers/mfd/simple-mfd-i2c.c
> @@ -39,6 +39,7 @@ static int simple_mfd_i2c_probe(struct i2c_client *i2c)
>  
>  static const struct of_device_id simple_mfd_i2c_of_match[] = {
>  	{ .compatible = "kontron,sl28cpld" },
> +	{ .compatible = "delta,tn48m-cpld" },
>  	{}
>  };
>  MODULE_DEVICE_TABLE(of, simple_mfd_i2c_of_match);

Once fixed, please apply my:

For my own reference (apply this as-is to your sign-off block):

  Acked-for-MFD-by: Lee Jones <lee.jones@...aro.org>

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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