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[v3,2/5] iio: adc: sun4i-gpadc-iio: rename A23/A33-specified registers to contain A23

Message ID 20170723141354.42646-3-icenowy@aosc.io (mailing list archive)
State New, archived
Headers show

Commit Message

Icenowy Zheng July 23, 2017, 2:13 p.m. UTC
As the H3 SoC, which is also in sun8i line, has totally different
register map for the thermal sensor (a cut down version of GPADC), we
should rename A23/A33-specified registers to contain A23, in order to
prevent obfuscation with H3 registers. Currently these registers are
only prefixed "SUN8I", not "SUN8I_A23".

Add "_A23" after "SUN8I" on the register names.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
 drivers/iio/adc/sun4i-gpadc-iio.c | 2 +-
 include/linux/mfd/sun4i-gpadc.h   | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

Comments

Chen-Yu Tsai July 24, 2017, 6:02 a.m. UTC | #1
On Sun, Jul 23, 2017 at 10:13 PM, Icenowy Zheng <icenowy@aosc.io> wrote:
> As the H3 SoC, which is also in sun8i line, has totally different
> register map for the thermal sensor (a cut down version of GPADC), we
> should rename A23/A33-specified registers to contain A23, in order to
> prevent obfuscation with H3 registers. Currently these registers are
> only prefixed "SUN8I", not "SUN8I_A23".
>
> Add "_A23" after "SUN8I" on the register names.

Nit: the compatible string as well as the initial driver targets the A33.
Naming the registers as such would be more consistent.

Otherwise,

Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Icenowy Zheng July 24, 2017, 6:06 a.m. UTC | #2
在 2017-07-24 14:02,Chen-Yu Tsai 写道:
> On Sun, Jul 23, 2017 at 10:13 PM, Icenowy Zheng <icenowy@aosc.io> 
> wrote:
>> As the H3 SoC, which is also in sun8i line, has totally different
>> register map for the thermal sensor (a cut down version of GPADC), we
>> should rename A23/A33-specified registers to contain A23, in order to
>> prevent obfuscation with H3 registers. Currently these registers are
>> only prefixed "SUN8I", not "SUN8I_A23".
>> 
>> Add "_A23" after "SUN8I" on the register names.
> 
> Nit: the compatible string as well as the initial driver targets the 
> A33.
> Naming the registers as such would be more consistent.

But the registers are the same between A23 and A33.

In fact the only difference between A23 and A33 is the formula's 
factors.

> 
> Otherwise,
> 
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Chen-Yu Tsai July 24, 2017, 6:14 a.m. UTC | #3
On Mon, Jul 24, 2017 at 2:06 PM,  <icenowy@aosc.io> wrote:
> 在 2017-07-24 14:02,Chen-Yu Tsai 写道:
>>
>> On Sun, Jul 23, 2017 at 10:13 PM, Icenowy Zheng <icenowy@aosc.io> wrote:
>>>
>>> As the H3 SoC, which is also in sun8i line, has totally different
>>> register map for the thermal sensor (a cut down version of GPADC), we
>>> should rename A23/A33-specified registers to contain A23, in order to
>>> prevent obfuscation with H3 registers. Currently these registers are
>>> only prefixed "SUN8I", not "SUN8I_A23".
>>>
>>> Add "_A23" after "SUN8I" on the register names.
>>
>>
>> Nit: the compatible string as well as the initial driver targets the A33.
>> Naming the registers as such would be more consistent.
>
>
> But the registers are the same between A23 and A33.
>
> In fact the only difference between A23 and A33 is the formula's factors.

The goal here is to keep things consistent. Nothing in this driver as
it currently is mentions A23. Unless you plan on adding additional
commits to support the A23, and a note explaining the similarity
of the A23 and A33 ADCs, this is only going to confuse people.

ChenYu

>
>>
>> Otherwise,
>>
>> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
>
>
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diff mbox

Patch

diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
index 81d4c39e414a..41769bc6a429 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -88,7 +88,7 @@  static const struct gpadc_data sun6i_gpadc_data = {
 static const struct gpadc_data sun8i_a33_gpadc_data = {
 	.temp_offset = -1662,
 	.temp_scale = 162,
-	.tp_mode_en = SUN8I_GPADC_CTRL1_CHOP_TEMP_EN,
+	.tp_mode_en = SUN8I_A23_GPADC_CTRL1_CHOP_TEMP_EN,
 };
 
 struct sun4i_gpadc_iio {
diff --git a/include/linux/mfd/sun4i-gpadc.h b/include/linux/mfd/sun4i-gpadc.h
index 139872c2e0fe..d31d962bb7d8 100644
--- a/include/linux/mfd/sun4i-gpadc.h
+++ b/include/linux/mfd/sun4i-gpadc.h
@@ -38,9 +38,9 @@ 
 #define SUN6I_GPADC_CTRL1_ADC_CHAN_SELECT(x)		(GENMASK(3, 0) & BIT(x))
 #define SUN6I_GPADC_CTRL1_ADC_CHAN_MASK			GENMASK(3, 0)
 
-/* TP_CTRL1 bits for sun8i SoCs */
-#define SUN8I_GPADC_CTRL1_CHOP_TEMP_EN			BIT(8)
-#define SUN8I_GPADC_CTRL1_GPADC_CALI_EN			BIT(7)
+/* TP_CTRL1 bits for sun8i A23/A33 SoCs */
+#define SUN8I_A23_GPADC_CTRL1_CHOP_TEMP_EN		BIT(8)
+#define SUN8I_A23_GPADC_CTRL1_GPADC_CALI_EN		BIT(7)
 
 #define SUN4I_GPADC_CTRL2				0x08