Hi Stan,
On 31-Oct-16 2:56 PM, Stanimir Varbanov wrote:
Hi Rama,
On 10/31/2016 09:12 AM, Rama Krishna Phani A wrote:
Hi Jonathan,
On 30-Oct-16 10:43 PM, Jonathan Cameron wrote:
On 27/10/16 18:37, Phani A, Rama Krishna wrote:
Hi Stan,
On 27-Oct-16 4:48 PM, Stanimir Varbanov wrote:
Hi Rama,
On 10/26/2016 05:41 PM, Rama Krishna Phani A wrote:
Polling can also be used for End of conversion completion.
Implement logic
to choose either polling or interrupt for End of conversion
completion.
Scaling can be done on the voltage to report adc code in physical
units.
Add changes to support different scale functions to convert adc
code to
physical units.
Signed-off-by: Rama Krishna Phani A <rphani@xxxxxxxxxxxxxx>
---
.../devicetree/bindings/iio/adc/qcom,spmi-vadc.txt | 14 ++
drivers/iio/adc/qcom-spmi-vadc.c | 263
+++++++++++++++++----
2 files changed, 236 insertions(+), 41 deletions(-)
diff --git
a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
index 0fb4613..39e31c0e 100644
--- a/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/qcom,spmi-vadc.txt
@@ -37,6 +37,12 @@ VADC node:
Value type: <prop-encoded-array>
Definition: End of conversion interrupt.
+- qcom,vadc-poll-eoc:
+ Usage: optional
+ Value type: <bool>
+ Definition: Use polling instead of interrupts for End of
Conversion
+ completion.
Why you need to add such a flag in DT?
The DT should describe hardware details not how the driver will choose
pooling vs interrupt.
On which use-case you would prefer pooling?
Few PMIC's support interrupt functionality for ADC where as few
PMIC's dont support. Based on the functionality that is supported in
hardware we choose whether to go for polling or for interrupt.
Can't use the usual trick of an optional interrupt in DT?
If it's there we try to use it, if not then fall back to polling?
Ok., Will check this logic for implementation and will post next patch.
The interrupts DT property in binding doc is marked as optional already,
so I can't really understand what you are trying to achieve with this
new qcom,vadc-poll-eoc boolean property?
Agree., interrupts property is sufficient for this functionality. Will
remove this DT binding in next patch.
Thanks,
Ramakrishna
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