linux-kernel - Re: [PATCH 1/2] i2c: designware: introduce a custom scl recovery for SoCFPGA platforms

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Message-ID: <YoYaA5iTin3rzuob@smile.fi.intel.com>
Date:   Thu, 19 May 2022 13:20:51 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Dinh Nguyen <dinguyen@...nel.org>
Cc:     jarkko.nikula@...ux.intel.com, mika.westerberg@...ux.intel.com,
        robh+dt@...nel.org, krzk+dt@...nel.org, linux-i2c@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] i2c: designware: introduce a custom scl recovery for
 SoCFPGA platforms

On Wed, May 18, 2022 at 03:22:16PM -0500, Dinh Nguyen wrote:
> The I2C pins on the SoCFPGA platforms do not go through a GPIO module,
> thus cannot be recovered by the default method of by doing a GPIO access.
> Only a reset of the I2C IP block can a recovery be successful.

...

>  #define MODEL_BAIKAL_BT1	BIT(9)
>  #define MODEL_AMD_NAVI_GPU	BIT(10)
> +#define MODEL_SOCFPGA		BIT(11)

...

> -#define MODEL_MASK		GENMASK(11, 8)

> +#define MODEL_MASK		GENMASK(12, 8)

Why this change is made?

...

> +	switch (dev->flags & MODEL_MASK) {
> +	case MODEL_SOCFPGA:
> +		rinfo->recover_bus = i2c_custom_scl_recovery;

_custom_ is too broad, use exact name, i.e.

	i2c_socfpga_scl_recovery

> +		break;
> +	default:
> +		rinfo->recover_bus = i2c_generic_scl_recovery;
> +		break;
> +	}

...

> +	{ .compatible = "intel,socfpga-i2c", .data = (void *)MODEL_SOCFPGA },

> +

Stray change.

-- 
With Best Regards,
Andy Shevchenko