linux-kernel - [PATCH] hwmon: aspeed: add THERMAL dependency

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Message-Id: <20170815144856.2059759-1-arnd@arndb.de>
Date:   Tue, 15 Aug 2017 16:47:47 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Jaghathiswari Rankappagounder Natarajan <jaghu@...gle.com>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] hwmon: aspeed: add THERMAL dependency

With CONFIG_THERMAL=m, a built-in aspeed pwm tacho driver causes
a link error:

drivers/hwmon/aspeed-pwm-tacho.o: In function `aspeed_pwm_tacho_probe':
aspeed-pwm-tacho.c:(.text+0x7f0): undefined reference to `thermal_of_cooling_device_register'

This adds a dependency similar to what other hwmon drivers use,
ensuring that the aspeed driver cannot be built-in in this
case but has to be a module. With THERMAL=n, we still allow building it.

Fixes: 2d7a548a3eff ("drivers: hwmon: Support for ASPEED PWM/Fan tach")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/hwmon/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index 5ef2814345ef..5b9a61f766ac 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -343,6 +343,7 @@ config SENSORS_ASB100
 
 config SENSORS_ASPEED
 	tristate "ASPEED AST2400/AST2500 PWM and Fan tach driver"
+	depends on THERMAL || THERMAL=n
 	select REGMAP
 	help
 	  This driver provides support for ASPEED AST2400/AST2500 PWM
-- 
2.9.0