HWMON: Add JZ4740 ADC driver

Add support for reading the ADCIN pin of the ADC unit on JZ4740 SoCs.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: lm-sensors@lm-sensors.org
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1425/
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig
index e19cf8e..c57e530 100644
--- a/drivers/hwmon/Kconfig
+++ b/drivers/hwmon/Kconfig
@@ -446,6 +446,16 @@
 	  This driver can also be built as a module.  If so, the module
 	  will be called it87.
 
+config SENSORS_JZ4740
+	tristate "Ingenic JZ4740 SoC ADC driver"
+	depends on MACH_JZ4740 && MFD_JZ4740_ADC
+	help
+	  If you say yes here you get support for reading adc values from the ADCIN
+	  pin on Ingenic JZ4740 SoC based boards.
+
+	  This driver can also be build as a module. If so, the module will be
+	  called jz4740-hwmon.
+
 config SENSORS_LM63
 	tristate "National Semiconductor LM63 and LM64"
 	depends on I2C