Re: [PATCH] i2c: Make I2C_ATR invisible

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Hi Geert,

On 16/08/2023 11:17, Geert Uytterhoeven wrote:
Hi Tomi,

On Tue, Aug 15, 2023 at 6:00 PM Tomi Valkeinen
<tomi.valkeinen@xxxxxxxxxxxxxxxx> wrote:
On 15/08/2023 18:29, Geert Uytterhoeven wrote:
I2C Address Translator (ATR) support is not a stand-alone driver, but a
library.  All of its users select I2C_ATR.  Hence there is no need for
the user to enable this symbol manually, except when compile-testing.

Fixes: a076a860acae77bb ("media: i2c: add I2C Address Translator (ATR) support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Do we care yet about out-of-tree drivers that need this functionality?
---
   drivers/i2c/Kconfig | 2 +-
   1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index c6d1a345ea6d8aee..9388823bb0bb960c 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -72,7 +72,7 @@ config I2C_MUX
   source "drivers/i2c/muxes/Kconfig"

   config I2C_ATR
-     tristate "I2C Address Translator (ATR) support"
+     tristate "I2C Address Translator (ATR) support" if COMPILE_TEST
       help
         Enable support for I2C Address Translator (ATR) chips.


Isn't this normally done with just "tristate", without the text? Is
there a need to make configs manually selectable when compile-test is
enabled?

"tristate" without the text would make the symbol invisible, too.
However, then the user has no way to enable it for compile-testing
(unless also enabling one of the symbols that select it, which may
  not be possible due to other dependencies).

Yes. My point/question is, i2c-atr isn't different than any other selectable kconfig (afaics), like, say, DRM_KMS_HELPER. So is the "official" way (if there is such a thing) to add selectable kconfigs with just "tristate", or tristate with "if COMPILE_TEST". I thought it was the former, but I can see value with the latter too.

 Tomi




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