RE: [PATCH v2 3/4] rtc: bbnsm: Add the bbnsm rtc support

From: Jacky Bai <ping.bai@nxp.com>
To: Alexandre Belloni <alexandre.belloni@bootlin.com>
Cc: "lee@kernel.org" <lee@kernel.org>,
	"robh+dt@kernel.org" <robh+dt@kernel.org>,
	"krzysztof.kozlowski+dt@linaro.org" 
	<krzysztof.kozlowski+dt@linaro.org>,
	"shawnguo@kernel.org" <shawnguo@kernel.org>,
	"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
	"dmitry.torokhov@gmail.com" <dmitry.torokhov@gmail.com>,
	"a.zummo@towertech.it" <a.zummo@towertech.it>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-input@vger.kernel.org" <linux-input@vger.kernel.org>,
	"linux-rtc@vger.kernel.org" <linux-rtc@vger.kernel.org>,
	"kernel@pengutronix.de" <kernel@pengutronix.de>,
	dl-linux-imx <linux-imx@nxp.com>,
	"festevam@gmail.com" <festevam@gmail.com>
Subject: RE: [PATCH v2 3/4] rtc: bbnsm: Add the bbnsm rtc support
Date: Tue, 3 Jan 2023 01:23:53 +0000	[thread overview]
Message-ID: <AS8PR04MB8642AE9D87FB0ACF883A1CC887F49@AS8PR04MB8642.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <Y6wldnu6+apmnSxJ@mail.local>

> Subject: Re: [PATCH v2 3/4] rtc: bbnsm: Add the bbnsm rtc support
> 
> On 26/12/2022 10:39:41+0800, Jacky Bai wrote:
> > +static int bbnsm_rtc_read_time(struct device *dev, struct rtc_time
> > +*tm) {
> > +	struct bbnsm_rtc *bbnsm = dev_get_drvdata(dev);
> > +	unsigned long time;
> > +	u32 val;
> > +
> > +	regmap_read(bbnsm->regmap, BBNSM_CTRL, &val);
> > +	if ((val & RTC_EN_MSK) != RTC_EN) {
> > +		dev_warn(dev, "RTC is not enabled, time is invalid!\n");
> 
> I don't think this message is necessary.
> 

Ok, will remove it.

> > +		return -EINVAL;
> > +	}
> > +
> > +	time = bbnsm_read_counter(bbnsm);
> > +	rtc_time64_to_tm(time, tm);
> > +
> > +	return 0;
> > +}
> > +
> 
> [...]
> 
> > +static int bbnsm_rtc_probe(struct platform_device *pdev) {
> > +	struct bbnsm_rtc *bbnsm;
> > +	int ret;
> > +
> > +	bbnsm = devm_kzalloc(&pdev->dev, sizeof(*bbnsm), GFP_KERNEL);
> > +	if (!bbnsm)
> > +		return -ENOMEM;
> > +
> > +	bbnsm->rtc = devm_rtc_allocate_device(&pdev->dev);
> > +
> > +	bbnsm->regmap =
> syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
> "nxp,bbnsm-regmap");
> > +	if (IS_ERR(bbnsm->regmap)) {
> > +		dev_err(&pdev->dev, "bbnsm get regmap failed\n");
> 
> Maybe this should be a dev_dbg?

Fine, will fix in V3.

BR

> 
> > +		return PTR_ERR(bbnsm->regmap);
> > +	}
> > +
> > +	bbnsm->irq = platform_get_irq(pdev, 0);
> > +	if (bbnsm->irq < 0)
> > +		return bbnsm->irq;
> > +
> > +	platform_set_drvdata(pdev, bbnsm);
> > +
> > +	/* clear all the pending events */
> > +	regmap_write(bbnsm->regmap, BBNSM_EVENTS, 0x7A);
> > +
> > +	device_init_wakeup(&pdev->dev, true);
> > +	dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq);
> > +
> > +	ret = devm_request_irq(&pdev->dev, bbnsm->irq,
> bbnsm_rtc_irq_handler,
> > +			IRQF_SHARED, "rtc alarm", &pdev->dev);
> > +	if (ret) {
> > +		dev_err(&pdev->dev, "failed to request irq %d: %d\n",
> > +			bbnsm->irq, ret);
> > +		return ret;
> > +	}
> > +
> > +	bbnsm->rtc->ops = &bbnsm_rtc_ops;
> > +	bbnsm->rtc->range_max = U32_MAX;
> > +
> > +	return devm_rtc_register_device(bbnsm->rtc);
> > +}
> > +
> > +static const struct of_device_id bbnsm_dt_ids[] = {
> > +	{ .compatible = "nxp,bbnsm-rtc", },
> > +	{ /* sentinel */ },
> > +};
> > +MODULE_DEVICE_TABLE(of, bbnsm_dt_ids);
> > +
> > +static struct platform_driver bbnsm_rtc_driver = {
> > +	.driver = {
> > +		.name = "bbnsm_rtc",
> > +		.of_match_table = bbnsm_dt_ids,
> > +	},
> > +	.probe = bbnsm_rtc_probe,
> > +};
> > +module_platform_driver(bbnsm_rtc_driver);
> > +
> > +MODULE_AUTHOR("Jacky Bai <ping.bai@nxp.com>");
> > +MODULE_DESCRIPTION("NXP BBNSM RTC Driver");
> MODULE_LICENSE("GPL");
> > --
> > 2.37.1
> >
> 
> --
> Alexandre Belloni, co-owner and COO, Bootlin
> Embedded Linux and Kernel engineering
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