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From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Chanwoo Choi <cw00.choi@samsung.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Lee Jones <lee.jones@linaro.org>,
	Liam Girdwood <lgirdwood@gmail.com>,
	linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
	devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org
Cc: Krzysztof Kozlowski <krzk@kernel.org>,
	Marek Szyprowski <m.szyprowski@samsung.com>
Subject: [RESEND PATCH v2 1/4] mfd: sec-irq: Do not enforce (incorrect) interrupt trigger type
Date: Wed,  2 Jun 2021 13:04:42 +0200	[thread overview]
Message-ID: <20210602110445.33536-1-krzysztof.kozlowski@canonical.com> (raw)

From: Krzysztof Kozlowski <krzk@kernel.org>

Interrupt line can be configured on different hardware in different way,
even inverted.  Therefore driver should not enforce specific trigger
type - edge falling - but instead rely on Devicetree to configure it.

The Samsung PMIC drivers are used only on Devicetree boards.

Additionally, the PMIC datasheets describe the interrupt line as active
low with a requirement of acknowledge from the CPU therefore the edge
falling is not correct.

Marek Szyprowski reports that together with DTS change (proper level in
DTS) it fixes RTC alarm failure that he observed from time to time on
TM2e board.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

---

Rebased on https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git/log/?h=for-mfd-next

Changes since v1:
1. Mention in commit msg that this fixes TM2e RTC alarm.
2. Add Marek's tested-by.
---
 drivers/mfd/sec-irq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/mfd/sec-irq.c b/drivers/mfd/sec-irq.c
index e473c2fb42d5..f5f59fdc72fe 100644
--- a/drivers/mfd/sec-irq.c
+++ b/drivers/mfd/sec-irq.c
@@ -479,8 +479,7 @@ int sec_irq_init(struct sec_pmic_dev *sec_pmic)
 	}
 
 	ret = devm_regmap_add_irq_chip(sec_pmic->dev, sec_pmic->regmap_pmic,
-				       sec_pmic->irq,
-				       IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+				       sec_pmic->irq, IRQF_ONESHOT,
 				       0, sec_irq_chip, &sec_pmic->irq_data);
 	if (ret != 0) {
 		dev_err(sec_pmic->dev, "Failed to register IRQ chip: %d\n", ret);
-- 
2.27.0


             reply	other threads:[~2021-06-02 11:05 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-02 11:04 Krzysztof Kozlowski [this message]
2021-06-02 11:04 ` [RESEND PATCH v2 2/4] mfd: max77686: " Krzysztof Kozlowski
2021-09-28  9:53   ` Lee Jones
2021-06-02 11:04 ` [RESEND PATCH v2 3/4] mfd: max77693: " Krzysztof Kozlowski
2021-09-28  9:52   ` Lee Jones
2021-06-02 11:04 ` [RESEND PATCH v2 4/4] mfd: max14577: " Krzysztof Kozlowski
2021-09-28  9:52   ` Lee Jones
2021-09-22  8:10 ` [RESEND PATCH v2 1/4] mfd: sec-irq: " Krzysztof Kozlowski
2021-09-28  9:52 ` Lee Jones

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