[PATCH AUTOSEL 4.19 18/39] rtc: mxc_v2: add missing MODULE_DEVICE_TABLE

[PATCH AUTOSEL 4.19 18/39] rtc: mxc_v2: add missing MODULE_DEVICE_TABLE

[Sasha Levin]

From: Bixuan Cui <cuibixuan@huawei.com>

[ Upstream commit 206e04ec7539e7bfdde9aa79a7cde656c9eb308e ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Bixuan Cui <cuibixuan@huawei.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210508031509.53735-1-cuibixuan@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/rtc/rtc-mxc_v2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/rtc/rtc-mxc_v2.c b/drivers/rtc/rtc-mxc_v2.c
index 007879a5042d..45c7366b7286 100644
--- a/drivers/rtc/rtc-mxc_v2.c
+++ b/drivers/rtc/rtc-mxc_v2.c
@@ -395,6 +395,7 @@ static const struct of_device_id mxc_ids[] = {
 	{ .compatible = "fsl,imx53-rtc", },
 	{}
 };
+MODULE_DEVICE_TABLE(of, mxc_ids);
 
 static struct platform_driver mxc_rtc_driver = {
 	.driver = {
-- 
2.30.2

[PATCH AUTOSEL 4.19 34/39] rtc: max77686: Do not enforce (incorrect) interrupt trigger type

[Sasha Levin]

From: Krzysztof Kozlowski <krzk@kernel.org>

[ Upstream commit 742b0d7e15c333303daad4856de0764f4bc83601 ]

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 Maxim 77686 datasheet describes the interrupt line as active low
with a requirement of acknowledge from the CPU therefore the edge
falling is not correct.

The interrupt line is shared between PMIC and RTC driver, so using level
sensitive interrupt is here especially important to avoid races.  With
an edge configuration in case if first PMIC signals interrupt followed
shortly after by the RTC, the interrupt might not be yet cleared/acked
thus the second one would not be noticed.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210526172036.183223-6-krzysztof.kozlowski@canonical.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/rtc/rtc-max77686.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 4aff349ae301..8e09450d11a6 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -710,8 +710,8 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
 
 add_rtc_irq:
 	ret = regmap_add_irq_chip(info->rtc_regmap, info->rtc_irq,
-				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
-				  IRQF_SHARED, 0, info->drv_data->rtc_irq_chip,
+				  IRQF_ONESHOT | IRQF_SHARED,
+				  0, info->drv_data->rtc_irq_chip,
 				  &info->rtc_irq_data);
 	if (ret < 0) {
 		dev_err(info->dev, "Failed to add RTC irq chip: %d\n", ret);
-- 
2.30.2