[PATCH] regulator: da9121: Fix Wvoid-pointer-to-enum-cast warning

[PATCH] regulator: da9121: Fix Wvoid-pointer-to-enum-cast warning

[Krzysztof Kozlowski]

'subvariant_id' is an enum, thus cast of pointer on 64-bit compile test
with clang and W=1 causes:

  da9121-regulator.c:1132:24: error: cast to smaller integer type 'enum da9121_subvariant' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast]

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

---

One of the discussions in 2023 on LKML suggested warning is not suitable
for kernel, however other points were that we actually want these to be
fixed (IIUC):
  https://lore.kernel.org/all/20230814160457.GA2836@dev-arch.thelio-3990X/

Nothing changed in disabling the warning for more than a year, so assume
the warning will stay and we really want to have warnings-free builds.
---
 drivers/regulator/da9121-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c
index 17527a3f53b4..ef161eb0ca27 100644
--- a/drivers/regulator/da9121-regulator.c
+++ b/drivers/regulator/da9121-regulator.c
@@ -1129,7 +1129,7 @@ static int da9121_i2c_probe(struct i2c_client *i2c)
 	}
 
 	chip->pdata = i2c->dev.platform_data;
-	chip->subvariant_id = (enum da9121_subvariant)i2c_get_match_data(i2c);
+	chip->subvariant_id = (kernel_ulong_t)i2c_get_match_data(i2c);
 
 	ret = da9121_assign_chip_model(i2c, chip);
 	if (ret < 0)
-- 
2.45.2

Re: [PATCH] regulator: da9121: Fix Wvoid-pointer-to-enum-cast warning

[Mark Brown]

On Fri, 09 May 2025 16:24:49 +0200, Krzysztof Kozlowski wrote:
> 'subvariant_id' is an enum, thus cast of pointer on 64-bit compile test
> with clang and W=1 causes:
> 
>   da9121-regulator.c:1132:24: error: cast to smaller integer type 'enum da9121_subvariant' from 'const void *' [-Werror,-Wvoid-pointer-to-enum-cast]
> 
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next

Thanks!

[1/1] regulator: da9121: Fix Wvoid-pointer-to-enum-cast warning
      commit: d5cc09847fa0df4034076f884de5957ec816dc52

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark