ARM: dts: ux500: Add GPS to Janice device tree

This adds the CSR GSD4t GPS to the Janice device tree.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 39 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/ste-ux500-samsung-janice.dts b/arch/arm/boot/dts/ste-ux500-samsung-janice.dts
index 16f61d8acf4c..e6d4fd0eb5f4 100644
--- a/arch/arm/boot/dts/ste-ux500-samsung-janice.dts
+++ b/arch/arm/boot/dts/ste-ux500-samsung-janice.dts
@@ -485,7 +485,26 @@
 			/* CTS/RTS is not used, CTS is repurposed as GPIO */
 			pinctrl-0 = <&u1rxtx_a_1_default>;
 			pinctrl-1 = <&u1rxtx_a_1_sleep>;
-			/* FIXME: add a device for the GPS here */
+
+			gnss {
+				/*
+				 * The Low Noise Amplifier (LNA) power and enablement is controlled
+				 * autonomously by the GSD4t.
+				 * Janice has a SiRFstarIV-based GSD4t
+				 * Golden has a SiRFstarV 5t-based CSRG05TA03-ICJE-R.
+				 */
+				compatible = "csr,gsd4t";
+				/* GPS_RSTN on GPIO21 */
+				reset-gpios = <&gpio0 21 GPIO_ACTIVE_LOW>;
+				/* GPS_ON_OFF on GPIO96 */
+				sirf,onoff-gpios = <&gpio3 0 GPIO_ACTIVE_HIGH>;
+				/* GPS_1V8 (VSMPS2) */
+				vcc-supply = <&db8500_vsmps2_reg>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&gsd4t_janice_default>;
+				/* According to /etc/sirfgps.conf */
+				current-speed = <460800>;
+			};
 		};
 
 		/* Debugging console UART connected to TSU6111RSVR (FSA880) */
@@ -945,4 +964,23 @@
 			};
 		};
 	};
+	gsd4t {
+		gsd4t_janice_default: gsd4t_janice {
+			/* Reset line, start out asserted */
+			janice_cfg1 {
+				pins = "GPIO21_AB3";
+				ste,config = <&gpio_out_lo>;
+			};
+			/* GPS_ON_OFF, start out deasserted (off) */
+			janice_cfg2 {
+				pins = "GPIO96_D8";
+				ste,config = <&gpio_out_lo>;
+			};
+			/* Unused power enablement line, used in R0.0 and R0.1 boards */
+			janice_cfg3 {
+				pins = "GPIO86_C6";
+				ste,config = <&gpio_in_pd>;
+			};
+		};
+	};
 };