linux-kernel - Re: [PATCH V2 5/6] Thermal: Add ST-Ericsson DB8500 thermal dirver.

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Date:	Thu, 25 Oct 2012 15:12:12 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Hongbo Zhang <hongbo.zhang@...aro.org>
Cc:	Amit Kucheria <amit.kucheria@...aro.org>,
	linaro-dev@...ts.linaro.org, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, STEricsson_nomadik_linux@...t.st.com,
	kernel@...oocommunity.org, linaro-kernel@...ts.linaro.org,
	"hongbo.zhang" <hongbo.zhang@...aro.com>, patches@...aro.org
Subject: Re: [PATCH V2 5/6] Thermal: Add ST-Ericsson DB8500 thermal dirver.

On 25 October 2012 15:03, Hongbo Zhang <hongbo.zhang@...aro.org> wrote:
> On 25 October 2012 16:41, Viresh Kumar <viresh.kumar@...aro.org> wrote:

> Just paste my current pieces of codes here:
>
> static struct db8500_thsens_platform_data*
>                 db8500_thermal_parse_dt(struct platform_device *pdev)
> {

>         if (!np) {
>                 dev_err(&pdev->dev, "Missing device tree data\n");

> }
>
> static int db8500_thermal_probe(struct platform_device *pdev)
> {

>         ptrips = db8500_thermal_parse_dt(pdev);
>         if (!ptrips)
>                 ptrips = dev_get_platdata(&pdev->dev);

So, the above code still has the flaw i pointed out. It will print
"Missing device tree data", while booting for non-DT case.

What i would suggest you is:

static int db8500_thermal_probe(struct platform_device *pdev)
{
        struct device_node *np = pdev->dev.of_node;

        if (np)
                ptrips = db8500_thermal_parse_dt(pdev);
        else
                ptrips = dev_get_platdata(&pdev->dev);

       if (!ptrips)
              explode!!


>>>>> +       ret = devm_request_threaded_irq(&pdev->dev, low_irq, NULL,

> I just saw that all the PRCMU and ab8500 related irqs use request_threaded_irq
> only difference is that I use devm_request_threaded_irq

See, i started this threaded_irq thread is to make sure you know
exactly what you
are doing. Others are doing it doesn't mean you should do it too.. :)

You must dig in a bit to see why is it required for your case? If
earlier code related
to PRCMU and db8500 is correct, then i am sure you need to sleep from your
handler.

--
viresh
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