linux-kernel - Re: [PATCH v6 2/3] rtc: sophgo: add rtc support for Sophgo CV1800 SoC

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Date: Tue, 16 Jan 2024 08:46:12 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Jingbao Qiu <qiujingbao.dlmu@...il.com>, alexandre.belloni@...tlin.com,
 robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
 chao.wei@...hgo.com, unicorn_wang@...look.com, paul.walmsley@...ive.com,
 palmer@...belt.com, aou@...s.berkeley.edu
Cc: linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
 dlan@...too.org, inochiama@...look.com
Subject: Re: [PATCH v6 2/3] rtc: sophgo: add rtc support for Sophgo CV1800 SoC

On 15/01/2024 17:05, Jingbao Qiu wrote:
> Implement the RTC driver for CV1800, which able to provide time alarm
> and calibrate functionality.
> 
> Signed-off-by: Jingbao Qiu <qiujingbao.dlmu@...il.com>
> ---

> +
> +static int cv1800_rtc_probe(struct platform_device *pdev)
> +{
> +	struct cv1800_rtc_priv *rtc;
> +	uint32_t ctrl_val;
> +	int ret;
> +
> +	rtc = devm_kzalloc(&pdev->dev, sizeof(struct cv1800_rtc_priv),
> +			   GFP_KERNEL);
> +	if (!rtc)
> +		return -ENOMEM;
> +
> +	rtc->dev = &pdev->dev;
> +
> +	rtc->rtc_map = syscon_node_to_regmap(rtc->dev->of_node->parent);
> +	if (IS_ERR(rtc->rtc_map))
> +		return PTR_ERR(rtc->rtc_map);

Why do you take the parent? Your bindings say this device is the syscon,
not parent. Your DTS shows there is no parent syscon! This wasn't tested.

Best regards,
Krzysztof