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rtc: pm8xxx: implement qcom,no-alarm flag for non-HLOS owned alarm

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Qualcomm x1e80100 firmware sets the ownership of the RTC alarm to ADSP.
Thus writing to RTC alarm registers and receiving alarm interrupts is not
possible.

Add a qcom,no-alarm flag to support RTC on this platform.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Link: https://lore.kernel.org/r/20241015004945.3676-2-jonathan@marek.ca
[ johan: drop no_alarm flag and restructure probe() ]
Tested-by: Jens Glathe <jens.glathe@oldschoolsolutions.biz>
Tested-by: Steev Klimaszewski <steev@kali.org>
Tested-by: Joel Stanley <joel@jms.id.au>
Tested-by: Sebastian Reichel <sre@kernel.org> # Lenovo T14s Gen6
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20250219134118.31017-5-johan+linaro@kernel.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Jonathan Marek 2025-02-19 14:41:16 +01:00 committed by Alexandre Belloni
parent e853658de5
commit 015b70bd6c
1 changed files with 20 additions and 14 deletions
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34
drivers/rtc/rtc-pm8xxx.c
View File

@ -606,9 +606,11 @@ static int pm8xxx_rtc_probe(struct platform_device *pdev)
if (!rtc_dd->regmap)
return -ENXIO;
rtc_dd->alarm_irq = platform_get_irq(pdev, 0);
if (rtc_dd->alarm_irq < 0)
return -ENXIO;
if (!of_property_read_bool(pdev->dev.of_node, "qcom,no-alarm")) {
rtc_dd->alarm_irq = platform_get_irq(pdev, 0);
if (rtc_dd->alarm_irq < 0)
return -ENXIO;
}
rtc_dd->allow_set_time = of_property_read_bool(pdev->dev.of_node,
"allow-set-time");
@ -624,8 +626,6 @@ static int pm8xxx_rtc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, rtc_dd);
devm_device_init_wakeup(&pdev->dev);
rtc_dd->rtc = devm_rtc_allocate_device(&pdev->dev);
if (IS_ERR(rtc_dd->rtc))
return PTR_ERR(rtc_dd->rtc);
@ -633,16 +633,22 @@ static int pm8xxx_rtc_probe(struct platform_device *pdev)
rtc_dd->rtc->ops = &pm8xxx_rtc_ops;
rtc_dd->rtc->range_max = U32_MAX;
rc = devm_request_any_context_irq(&pdev->dev, rtc_dd->alarm_irq,
pm8xxx_alarm_trigger,
IRQF_TRIGGER_RISING,
"pm8xxx_rtc_alarm", rtc_dd);
if (rc < 0)
return rc;
if (rtc_dd->alarm_irq) {
rc = devm_request_any_context_irq(&pdev->dev, rtc_dd->alarm_irq,
pm8xxx_alarm_trigger,
IRQF_TRIGGER_RISING,
"pm8xxx_rtc_alarm", rtc_dd);
if (rc < 0)
return rc;
rc = devm_pm_set_wake_irq(&pdev->dev, rtc_dd->alarm_irq);
if (rc)
return rc;
rc = devm_pm_set_wake_irq(&pdev->dev, rtc_dd->alarm_irq);
if (rc)
return rc;
devm_device_init_wakeup(&pdev->dev);
} else {
clear_bit(RTC_FEATURE_ALARM, rtc_dd->rtc->features);
}
return devm_rtc_register_device(rtc_dd->rtc);
}