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 4.4-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-4.4 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 Tue Apr 10 10:31:53 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-4.4/arm-dts-imx6qdl-wandboard-fix-audio-channel-swap.patch queue-4.4/arm-dts-imx53-qsrb-pulldown-pmic-irq-pin.patch queue-4.4/arm-imx-add-mxc_cpu_imx6ull-and-cpu_is_imx6ull.patch