This is a note to let you know that I've just added the patch titled
iio/adc: ingenic: Fix battery VREF for JZ4770 SoC
to the 5.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
iio-adc-ingenic-fix-battery-vref-for-jz4770-soc.patch
and it can be found in the queue-5.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c91ebcc578e09783cfa4d85c1b437790f140f29a Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Date: Wed, 4 Nov 2020 19:28:43 +0000
Subject: iio/adc: ingenic: Fix battery VREF for JZ4770 SoC
From: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
commit c91ebcc578e09783cfa4d85c1b437790f140f29a upstream.
The reference voltage for the battery is clearly marked as 1.2V in the
programming manual. With this fixed, the battery channel now returns
correct values.
Fixes: a515d6488505 ("IIO: Ingenic JZ47xx: Add support for JZ4770 SoC ADC.")
Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Acked-by: Artur Rojek <contact@xxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201104192843.67187-1-paul@xxxxxxxxxxxxxxx
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/iio/adc/ingenic-adc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iio/adc/ingenic-adc.c
+++ b/drivers/iio/adc/ingenic-adc.c
@@ -71,7 +71,7 @@
#define JZ4725B_ADC_BATTERY_HIGH_VREF_BITS 10
#define JZ4740_ADC_BATTERY_HIGH_VREF (7500 * 0.986)
#define JZ4740_ADC_BATTERY_HIGH_VREF_BITS 12
-#define JZ4770_ADC_BATTERY_VREF 6600
+#define JZ4770_ADC_BATTERY_VREF 1200
#define JZ4770_ADC_BATTERY_VREF_BITS 12
#define JZ_ADC_IRQ_AUX BIT(0)
Patches currently in stable-queue which might be from paul@xxxxxxxxxxxxxxx are
queue-5.9/iio-adc-ingenic-fix-aux-vbat-readings-when-touchscreen-is-used.patch
queue-5.9/iio-adc-ingenic-fix-battery-vref-for-jz4770-soc.patch
