From 44a146a44f656fc03d368c1b9248d29a128cd053 Mon Sep 17 00:00:00 2001
From: Necip Fazil Yildiran <fazilyildiran@gmail.com>
Date: Tue, 3 Nov 2020 01:35:24 +0300
Subject: [PATCH] iio: light: fix kconfig dependency bug for VCNL4035
Git-commit: 44a146a44f656fc03d368c1b9248d29a128cd053
Patch-mainline: v5.10-rc5
References: git-fixes

When VCNL4035 is enabled and IIO_BUFFER is disabled, it results in the
following Kbuild warning:

Warning: unmet direct dependencies detected for IIO_TRIGGERED_BUFFER  Depends on [n]: IIO [=y] && IIO_BUFFER [=n]  Selected by [y]:  - VCNL4035 [=y] && IIO [=y] && I2C [=y]

The reason is that VCNL4035 selects IIO_TRIGGERED_BUFFER without depending
on or selecting IIO_BUFFER while IIO_TRIGGERED_BUFFER depends on
IIO_BUFFER. This can also fail building the kernel.

Honor the kconfig dependency to remove unmet direct dependency warnings
and avoid any potential build failures.

Fixes: 55707294c4eb ("iio: light: Add support for vishay vcnl4035")
Signed-off-by: Necip Fazil Yildiran <fazilyildiran@gmail.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=209883
Link: https://lore.kernel.org/r/20201102223523.572461-1-fazilyildiran@gmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/iio/light/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index cade6dc0305b..33ad4dd0b5c7 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -544,6 +544,7 @@ config VCNL4000
 
 config VCNL4035
 	tristate "VCNL4035 combined ALS and proximity sensor"
+	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
 	select REGMAP_I2C
 	depends on I2C
-- 
2.16.4