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

ARM: dts: imx53-qsrb: Pulldown PMIC IRQ pin

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: arm-dts-imx53-qsrb-pulldown-pmic-irq-pin.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Mon Apr 9 17:09:24 CEST 2018

From: Fabio Estevam fabio.estevam@nxp.com Date: Wed, 12 Apr 2017 18:31:18 -0300 Subject: ARM: dts: imx53-qsrb: Pulldown PMIC IRQ pin

From: Fabio Estevam fabio.estevam@nxp.com

[ Upstream commit 2fe4bff3516924a37e083e3211364abe59db1161 ]

Currently the following errors are seen:

[ 14.015056] mc13xxx 0-0008: Failed to read IRQ status: -6 [ 27.321093] mc13xxx 0-0008: Failed to read IRQ status: -6 [ 27.411681] mc13xxx 0-0008: Failed to read IRQ status: -6 [ 27.456281] mc13xxx 0-0008: Failed to read IRQ status: -6 [ 30.527106] mc13xxx 0-0008: Failed to read IRQ status: -6 [ 36.596900] mc13xxx 0-0008: Failed to read IRQ status: -6

Also when reading the interrupts via 'cat /proc/interrupts' the PMIC GPIO interrupt counter does not stop increasing.

The reason for the storm of interrupts is that the PUS field of register IOMUXC_SW_PAD_CTL_PAD_CSI0_DAT5 is currently configured as: 10 : 100k pullup

and the PMIC interrupt is being registered as IRQ_TYPE_LEVEL_HIGH type, which is the correct type as per the MC34708 datasheet.

Use the default power on value for the IOMUX, which sets PUS field as: 00: 360k pull down

This prevents the spurious PMIC interrupts from happening.

Commit e1ffceb078c6 ("ARM: imx53: qsrb: fix PMIC interrupt level") correctly described the irq type as IRQ_TYPE_LEVEL_HIGH, but missed to update the IOMUX of the PMIC GPIO as pull down.

Fixes: e1ffceb078c6 ("ARM: imx53: qsrb: fix PMIC interrupt level") Signed-off-by: Fabio Estevam fabio.estevam@nxp.com Signed-off-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm/boot/dts/imx53-qsrb.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arm/boot/dts/imx53-qsrb.dts +++ b/arch/arm/boot/dts/imx53-qsrb.dts @@ -23,7 +23,7 @@ imx53-qsrb { pinctrl_pmic: pmicgrp { fsl,pins = < - MX53_PAD_CSI0_DAT5__GPIO5_23 0x1e4 /* IRQ */ + MX53_PAD_CSI0_DAT5__GPIO5_23 0x1c4 /* IRQ */ >; }; };

Patches currently in stable-queue which might be from fabio.estevam@nxp.com are

queue-4.9/arm-dts-imx6qdl-wandboard-fix-audio-channel-swap.patch queue-4.9/net-fec-add-a-fec_enet_clear_ethtool_stats-stub-for-config_m5272.patch queue-4.9/arm-dts-imx53-qsrb-pulldown-pmic-irq-pin.patch queue-4.9/arm-imx-add-mxc_cpu_imx6ull-and-cpu_is_imx6ull.patch