pinctrl: meson-gx: add TEST_N i2s pinmux

Add TEST_N pinmux for channel 6 and 7 of the i2s output

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/meson/pinctrl-meson-gxl.c b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
index 04334e8..3a14eca 100644
--- a/drivers/pinctrl/meson/pinctrl-meson-gxl.c
+++ b/drivers/pinctrl/meson/pinctrl-meson-gxl.c
@@ -291,6 +291,7 @@ static const unsigned int pwm_ao_b_6_pins[]	= { GPIOAO_6 };
 
 static const unsigned int i2s_out_ch23_ao_pins[] = { GPIOAO_8 };
 static const unsigned int i2s_out_ch45_ao_pins[] = { GPIOAO_9 };
+static const unsigned int i2s_out_ch67_ao_pins[] = { GPIO_TEST_N };
 
 static const unsigned int spdif_out_ao_6_pins[] = { GPIOAO_6 };
 static const unsigned int spdif_out_ao_9_pins[] = { GPIOAO_9 };
@@ -557,6 +558,9 @@ static struct meson_pmx_group meson_gxl_aobus_groups[] = {
 	GROUP(spdif_out_ao_9,	0,	4),
 	GROUP(ao_cec,		0,	15),
 	GROUP(ee_cec,		0,	14),
+
+	/* test n pin */
+	GROUP(i2s_out_ch67_ao,	1,	2),
 };
 
 static const char * const gpio_periphs_groups[] = {
@@ -735,7 +739,7 @@ static const char * const pwm_ao_b_groups[] = {
 };
 
 static const char * const i2s_out_ao_groups[] = {
-	"i2s_out_ch23_ao", "i2s_out_ch45_ao",
+	"i2s_out_ch23_ao", "i2s_out_ch45_ao", "i2s_out_ch67_ao",
 };
 
 static const char * const spdif_out_ao_groups[] = {