pinctrl: berlin: comment the spi functions

Add comments for the SPI functions, to distinguish CLK, SDI, SDO and
C{0,1,2,3}n.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/berlin/berlin-bg2q.c b/drivers/pinctrl/berlin/berlin-bg2q.c
index bd9662e..65fb871 100644
--- a/drivers/pinctrl/berlin/berlin-bg2q.c
+++ b/drivers/pinctrl/berlin/berlin-bg2q.c
@@ -59,21 +59,21 @@
 			BERLIN_PINCTRL_FUNCTION(0x2, "gpio"),
 			BERLIN_PINCTRL_FUNCTION(0x3, "eddc")),
 	BERLIN_PINCTRL_GROUP("G8", 0x18, 0x3, 0x18,
-			BERLIN_PINCTRL_FUNCTION(0x0, "spi1"),
+			BERLIN_PINCTRL_FUNCTION(0x0, "spi1"), /* CLK/SDI/SDO */
 			BERLIN_PINCTRL_FUNCTION(0x1, "gpio")),
 	BERLIN_PINCTRL_GROUP("G9", 0x18, 0x3, 0x1b,
-			BERLIN_PINCTRL_FUNCTION(0x0, "spi1"),
+			BERLIN_PINCTRL_FUNCTION(0x0, "spi1"), /* SS0n/SS1n */
 			BERLIN_PINCTRL_FUNCTION(0x1, "gpio"),
 			BERLIN_PINCTRL_FUNCTION(0x5, "sata")),
 	BERLIN_PINCTRL_GROUP("G10", 0x1c, 0x3, 0x00,
 			BERLIN_PINCTRL_FUNCTION(0x0, "gpio"),
-			BERLIN_PINCTRL_FUNCTION(0x1, "spi1"),
+			BERLIN_PINCTRL_FUNCTION(0x1, "spi1"), /* SS2n */
 			BERLIN_PINCTRL_FUNCTION(0x3, "i2s0"),
 			BERLIN_PINCTRL_FUNCTION(0x4, "pwm"),
 			BERLIN_PINCTRL_FUNCTION(0x5, "sata")),
 	BERLIN_PINCTRL_GROUP("G11", 0x1c, 0x3, 0x03,
 			BERLIN_PINCTRL_FUNCTION(0x0, "jtag"),
-			BERLIN_PINCTRL_FUNCTION(0x1, "spi1"),
+			BERLIN_PINCTRL_FUNCTION(0x1, "spi1"), /* SS3n */
 			BERLIN_PINCTRL_FUNCTION(0x2, "gpio"),
 			BERLIN_PINCTRL_FUNCTION(0x3, "i2s1"),
 			BERLIN_PINCTRL_FUNCTION(0x4, "pwm"),
@@ -301,19 +301,19 @@
 	/* GSM */
 	BERLIN_PINCTRL_GROUP("GSM0", 0x40, 0x2, 0x00,
 			BERLIN_PINCTRL_FUNCTION(0x0, "gpio"),
-			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"),
+			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"), /* SS0n */
 			BERLIN_PINCTRL_FUNCTION(0x2, "eth1")),
 	BERLIN_PINCTRL_GROUP("GSM1", 0x40, 0x2, 0x02,
 			BERLIN_PINCTRL_FUNCTION(0x0, "gpio"),
-			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"),
+			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"), /* SS1n */
 			BERLIN_PINCTRL_FUNCTION(0x2, "eth1")),
 	BERLIN_PINCTRL_GROUP("GSM2", 0x40, 0x2, 0x04,
 			BERLIN_PINCTRL_FUNCTION(0x0, "gpio"),
-			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"),
+			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"), /* SS2n/SS3n */
 			BERLIN_PINCTRL_FUNCTION(0x2, "eddc")),
 	BERLIN_PINCTRL_GROUP("GSM3", 0x40, 0x2, 0x06,
 			BERLIN_PINCTRL_FUNCTION(0x0, "gpio"),
-			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"),
+			BERLIN_PINCTRL_FUNCTION(0x1, "spi2"), /* CLK/SDO */
 			BERLIN_PINCTRL_FUNCTION(0x2, "eddc")),
 	BERLIN_PINCTRL_GROUP("GSM4", 0x40, 0x1, 0x08,
 			BERLIN_PINCTRL_FUNCTION(0x0, "gpio"),