patch "iio: adc: ad7192: Add IRQ flag" added to staging-linus

This is a note to let you know that I've just added the patch titled

iio: adc: ad7192: Add IRQ flag

to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 89a86da5cb8e0ee153111fb68a719d31582c206b Mon Sep 17 00:00:00 2001
From: Alexandru Tachici <[email protected]>
Date: Mon, 6 Sep 2021 09:56:28 +0300
Subject: iio: adc: ad7192: Add IRQ flag

IRQ type in ad_sigma_delta_info struct was missing.

In Sigma-Delta devices the SDO line is also used as an interrupt. Leaving IRQ on level instead of falling might trigger a sample read when the IRQ is enabled, as the SDO line is already low. Not sure if SDO line will always immediately go high in ad_sd_buffer_postenable before the IRQ is enabled.

Also the datasheet seem to explicitly say the falling edge of the SDO should be used as an interrupt:

as an interrupt to a processor,"

---
 drivers/iio/adc/ad7192.c | 1 +
 1 file changed, 1 insertion(+)

index ee8ed9481025..2121a812b0c3 100644
@@ -293,6 +293,7 @@ static const struct ad_sigma_delta_info ad7192_sigma_delta_info = {
 	.has_registers = true,
 	.addr_shift = 3,
 	.read_mask = BIT(6),
+	.irq_flags = IRQF_TRIGGER_FALLING,
 };
 
 static const struct ad_sd_calib_data ad7192_calib_arr[8] = {

2.33.0