The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
Possible dependencies:
bffb7d9d1a3d ("iio:adc:twl6030: Enable measurement of VAC") f804bd0dc286 ("iio:adc:twl6030: Enable measurements of VUSB, VBAT and others")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From bffb7d9d1a3dbd09e083b88aefd093b3b10abbfb Mon Sep 17 00:00:00 2001 From: Andreas Kemnade andreas@kemnade.info Date: Sat, 17 Dec 2022 23:13:05 +0100 Subject: [PATCH] iio:adc:twl6030: Enable measurement of VAC
VAC needs to be wired up to produce proper measurements, without this change only near zero values are reported.
Reported-by: kernel test robot lkp@intel.com Reported-by: Julia Lawall julia.lawall@lip6.fr Fixes: 1696f36482e7 ("iio: twl6030-gpadc: TWL6030, TWL6032 GPADC driver") Signed-off-by: Andreas Kemnade andreas@kemnade.info Link: https://lore.kernel.org/r/20221217221305.671117-1-andreas@kemnade.info Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com
diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c index 40438e5b4970..32873fb5f367 100644 --- a/drivers/iio/adc/twl6030-gpadc.c +++ b/drivers/iio/adc/twl6030-gpadc.c @@ -952,7 +952,7 @@ static int twl6030_gpadc_probe(struct platform_device *pdev) }
ret = twl_i2c_write_u8(TWL6030_MODULE_ID0, - VBAT_MEAS | BB_MEAS | BB_MEAS, + VBAT_MEAS | BB_MEAS | VAC_MEAS, TWL6030_MISC1); if (ret < 0) { dev_err(dev, "failed to wire up inputs\n");