linux-kernel - Re: [PATCH v2] mfd: ntxec: Support for EC in Tolino Shine 2 HD

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Date:   Mon, 8 Mar 2021 23:07:30 +0100
From:   Jonathan Neuschäfer <j.neuschaefer@....net>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     j.neuschaefer@....net, lee.jones@...aro.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] mfd: ntxec: Support for EC in Tolino Shine 2 HD

On Mon, Mar 08, 2021 at 10:29:52PM +0100, Andreas Kemnade wrote:
> Add the version of the EC in the Tolino Shine 2 HD
> to the supported versions. It seems not to have an RTC
> and does not ack data written to it.
> The vendor kernel happily ignores write errors, using
> I2C via userspace i2c-set also shows the error.
> So add a quirk to ignore that error.
> 
> PWM can be successfully configured despite of that error.
> 
> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> ---
[...]
>  	ec = devm_kmalloc(&client->dev, sizeof(*ec), GFP_KERNEL);
> @@ -137,6 +174,16 @@ static int ntxec_probe(struct i2c_client *client)
>  	/* Bail out if we encounter an unknown firmware version */
>  	switch (version) {
>  	case NTXEC_VERSION_KOBO_AURA:
> +		has_rtc = true;
> +		break;
> +	case NTXEC_VERSION_TOLINO_SHINE2:
> +		has_rtc = false;
> +		/* Another regmap stacked on top of the other */

"[...] on top of the first", perhaps

> +		ec->regmap = devm_regmap_init(ec->dev, NULL,
> +					      ec->regmap,
> +					      &regmap_config_noack);
> +		if (IS_ERR(ec->regmap))
> +			return PTR_ERR(ec->regmap);

In any case,

Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@....net>

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