iio: max517: Add support for MAX520 and MAX521 chips.

MAX520 and MAX521 are protocol-compatible with the already supported
chips, just have more channels.

Signed-off-by: Antonio Fiol <antonio@fiol.es>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 8 insertions, 3 deletions

diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index 2236ea22f98a..13471a76e5bf 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -143,11 +143,16 @@ config AD7303
           ad7303.
 
 config MAX517
-        tristate "Maxim MAX517/518/519 DAC driver"
+        tristate "Maxim MAX517/518/519/520/521 DAC driver"
         depends on I2C
         help
-          If you say yes here you get support for the Maxim chips MAX517,
-          MAX518 and MAX519 (I2C 8-Bit DACs with rail-to-rail outputs).
+          If you say yes here you get support for the following Maxim chips
+          (I2C 8-Bit DACs with rail-to-rail outputs):
+          MAX517 - Single channel, single reference
+          MAX518 - Dual channel, ref=Vdd
+          MAX519 - Dual channel, dual reference
+          MAX520 - Quad channel, quad reference
+          MAX521 - Octal channel, independent ref for ch0-3, shared ref for ch4-7
 
           This driver can also be built as a module.  If so, the module
           will be called max517.