This is a note to let you know that I've just added the patch titled
iio: adc: cc10001: Add delay before setting START bit
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 f29b212edb9e253cafcb4a2ab7842a890989f1a5 Mon Sep 17 00:00:00 2001
From: Naidu Tellapati <naidu.tellapati@xxxxxxxxxx>
Date: Thu, 7 May 2015 18:22:20 -0300
Subject: iio: adc: cc10001: Add delay before setting START bit
According to hardware team there should be some delay after
setting channel number, start mode and before setting START.
Add a one microsecond delay for this purpose.
Fixes: 1664f6a5b0c8 ("iio: adc: Cosmic Circuits 10001 ADC driver")
Signed-off-by: Naidu Tellapati <naidu.tellapati@xxxxxxxxxx>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@xxxxxxxxxx>
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxxx>
---
drivers/iio/adc/cc10001_adc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c
index fb7c5d2cc61a..115f6e99a7fa 100644
--- a/drivers/iio/adc/cc10001_adc.c
+++ b/drivers/iio/adc/cc10001_adc.c
@@ -100,6 +100,7 @@ static void cc10001_adc_start(struct cc10001_adc_device *adc_dev,
val = (channel & CC10001_ADC_CH_MASK) | CC10001_ADC_MODE_SINGLE_CONV;
cc10001_adc_write_reg(adc_dev, CC10001_ADC_CONFIG, val);
+ udelay(1);
val = cc10001_adc_read_reg(adc_dev, CC10001_ADC_CONFIG);
val = val | CC10001_ADC_START_CONV;
cc10001_adc_write_reg(adc_dev, CC10001_ADC_CONFIG, val);
--
2.4.0
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