diff --git a/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts b/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
index fc851a3177e7..c9775b66629f 100644
--- a/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
+++ b/arch/arm64/boot/dts/hisilicon/hi3670-hikey970.dts
@@ -37,6 +37,323 @@
 	};
 };
 
+/*
+ * Legend: proper name = the GPIO line is used as GPIO
+ *         NC = not connected (pin out but not routed from the chip to
+ *              anything the board)
+ *         "[PER]" = pin is muxed for [peripheral] (not GPIO)
+ *         "" = no idea, schematic doesn't say, could be
+ *              unrouted (not connected to any external pin)
+ *         LSEC = Low Speed External Connector
+ *         HSEC = High Speed External Connector
+ *
+ * Line names are taken from "hikey970-schematics.pdf" from HiSilicon.
+ *
+ * For the lines routed to the external connectors the
+ * lines are named after the 96Boards CE Specification 1.0,
+ * Appendix "Expansion Connector Signal Description".
+ *
+ * When the 96Board naming of a line and the schematic name of
+ * the same line are in conflict, the 96Board specification
+ * takes precedence, which means that the external UART on the
+ * LSEC is named UART0 while the schematic and SoC names this
+ * UART2. This is only for the informational lines i.e. "[FOO]",
+ * the GPIO named lines "GPIO-A" thru "GPIO-L" are the only
+ * ones actually used for GPIO.
+ */
+&gpio0 {
+	/* GPIO_000-GPIO_007 */
+	gpio-line-names =
+		"",
+		"TP901", /* TEST_MODE connected to TP901 */
+		"",
+		"GPIO_003_USB_HUB_RESET_N",
+		"NC",
+		"[AP_GPS_REF_CLK]",
+		"[I2C3_SCL]",
+		"[I2C3_SDA]";
+};
+
+&gpio1 {
+	/* GPIO_008-GPIO_015 */
+	gpio-line-names =
+		"[UART0_CTS]", /* LSEC pin 3: GPIO_008_UART2_CTS_N */
+		"[UART0_RTS]", /* LSEC pin 9: GPIO_009_UART2_RTS_N */
+		"[UART0_TXD]", /* LSEC pin 5: GPIO_010_UART2_TXD */
+		"[UART0_RXD]", /* LSEC pin 7: GPIO_011_UART2_RXD */
+		"[USER_LED5]",
+		"GPIO-I", /* LSEC pin 31: GPIO_013_CAM0_RST_N */
+		"[USER_LED3]",
+		"[USER_LED4]";
+};
+
+&gpio2 {
+	/* GPIO_016-GPIO_023 */
+	gpio-line-names =
+		"GPIO-G", /* LSEC pin 29: GPIO_016_LCD_TE0 */
+		"[CSI0_MCLK]", /* HSEC pin 15: ISP_CCLK0_MCAM */
+		"[CSI1_MCLK]", /* HSEC pin 17: ISP_CCLK1_SCAM */
+		"GPIO_019_BT_ACTIVE",
+		"[I2C2_SCL]", /* HSEC pin 32: ISP_SCL0 */
+		"[I2C2_SDA]", /* HSEC pin 34: ISP_SDA0 */
+		"[I2C3_SCL]", /* HSEC pin 36: ISP_SCL1 */
+		"[I2C3_SDA]"; /* HSEC pin 38: ISP_SDA1 */
+};
+
+&gpio3 {
+	/* GPIO_024-GPIO_031 */
+	gpio-line-names =
+		"GPIO_024_WIFI_ACTIVE",
+		"GPIO_025_PERST_M.2",
+		"[I2C4_SCL]",
+		"[I2C4_SDA]",
+		"NC",
+		"GPIO-H", /* LSEC pin 30: GPIO_029_LCD_RST_N */
+		"[USER_LED1]",
+		"GPIO-L"; /* LSEC pin 34: GPIO_031 */
+};
+
+&gpio4 {
+	/* GPIO_032-GPIO_039 */
+	gpio-line-names =
+		"GPIO-K", /* LSEC pin 33: GPIO_032_CAM1_RST_N */
+		"GPIO_033_PMU1_EN",
+		"GPIO_034_USBSW_SEL",
+		/*
+		 * These two pins should be used for SD(IO) data according
+		 * to the 96boards specification but seems to be repurposed
+		 * for UART 0. They are however named according to the spec.
+		 */
+		"[SD_DAT1]", /* HSEC pin 3: GPIO_035_UART0_RXD */
+		"[SD_DAT2]", /* HSEC pin 5: GPIO_036_UART0_TXD */
+		"[UART1_RXD]", /* LSEC pin 13: DEBUG_UART6_RXD */
+		"[UART1_TXD]", /* LSEC pin 11: DEBUG_UART6_TXD */
+		"[SOC_GPS_UART3_CTS_N]"; /* TP2304 */
+};
+
+&gpio5 {
+	/* GPIO_040-GPIO_047 */
+	gpio-line-names =
+		"[SOC_GPS_UART3_RTS_N]", /* TP2302 */
+		"[SOC_GPS_UART3_RXD]", /* TP2303 */
+		"[SOC_GPS_UART3_TXD]", /* TP2305 */
+		"[SOC_BT_UART4_CTS_N]",
+		"[SOC_BT_UART4_RTS_N]",
+		"[SOC_BT_UART4_RXD]",
+		"[SOC_BT_UART4_TXD]",
+		"NC";
+};
+
+&gpio6 {
+	/* GPIO_048-GPIO_055 */
+	gpio-line-names =
+		"NC",
+		"GPIO_049_USER_LED6",
+		"GPIO_050_CAN_RST",
+		"GPIO_051_WIFI_EN",
+		"GPIO-D", /* LSEC pin 26 */
+		"GPIO-J", /* LSEC pin 32 */
+		"GPIO_054_BT_EN",
+		"[GPIO_055_SEL]";
+};
+
+&gpio7 {
+	/* GPIO_056-GPIO_063 */
+	gpio-line-names =
+		"[PCIE_PERST_L]", "NC", "NC", "NC", "NC", "NC", "NC", "NC";
+};
+
+&gpio8 {
+	/* GPIO_064-GPIO_071 */
+	gpio-line-names = "NC", "NC", "NC", "NC", "NC", "NC", "NC", "NC";
+};
+
+&gpio9 {
+	/* GPIO_072-GPIO_079 */
+	gpio-line-names = "NC", "NC", "NC", "NC", "NC", "NC", "NC", "NC";
+};
+
+&gpio10 {
+	/* GPIO_080-GPIO_087 */
+	gpio-line-names = "NC", "NC", "NC", "NC", "NC", "NC", "NC", "NC";
+};
+
+&gpio11 {
+	/* GPIO_088-GPIO_095 */
+	gpio-line-names = "NC", "NC", "NC", "NC", "NC", "NC", "NC", "NC";
+};
+
+&gpio12 {
+	/* GPIO_096-GPIO_103 */
+	gpio-line-names = "NC", "", "", "", "", "", "", "";
+};
+
+&gpio13 {
+	/* GPIO_104-GPIO_111 */
+	gpio-line-names = "", "", "", "", "", "", "", "";
+};
+
+&gpio14 {
+	/* GPIO_112-GPIO_119 */
+	gpio-line-names = "", "", "", "", "", "", "", "";
+};
+
+&gpio15 {
+	/* GPIO_120-GPIO_127 */
+	gpio-line-names = "", "", "", "", "", "", "", "";
+};
+
+&gpio16 {
+	/* GPIO_128-GPIO_135 */
+	gpio-line-names =
+		"[WL_SDIO_CLK]",
+		"[WL_SDIO_CMD]",
+		"[WL_SDIO_DATA0]",
+		"[WL_SDIO_DATA1]",
+		"[WL_SDIO_DATA2]",
+		"[WL_SDIO_DATA3]",
+		"[ETH_ISOLATE]",
+		"NC";
+};
+
+&gpio17 {
+	/* GPIO_136-GPIO_143 */
+	gpio-line-names =
+		"[MINI1CLK_EN]", "NC", "", "", "", "", "", "";
+};
+
+&gpio18 {
+	/* GPIO_144-GPIO_151 */
+	gpio-line-names =
+		"[SPI1_SCLK]", /* HSEC pin 9: GPIO_144_SPI3_CLK */
+		"[SPI1_DIN]", /* HSEC pin 11: GPIO_145_SPI3_DI */
+		"[SPI1_DOUT]", /* HSEC pin 1: GPIO_146_SPI3_DO */
+		"[SPI1_CS]", /* HSEC pin 7: GPIO_147_SPI3_CS0_N */
+		"[POWER_INT_N]",
+		"[CDMA_GPS_SYNC]",
+		"GPIO_150_PEX_INTA",
+		"GPIO_151_CAN_INT";
+};
+
+&gpio19 {
+	/* GPIO_152-GPIO_159 */
+	gpio-line-names = "", "", "", "", "", "", "", "";
+};
+
+&gpio20 {
+	/* GPIO_160-GPIO_167 */
+	gpio-line-names =
+		"[SD_CLK]",
+		"[SD_CMD]",
+		"[SD_DATA0]",
+		"[SD_DATA1]",
+		"[SD_DATA2]",
+		"[SD_DATA3]",
+		"GPIO_166_ETHCLK_EN",
+		"GPIO_167_USER_LED2";
+};
+
+&gpio21 {
+	/* GPIO_168-GPIO_175 */
+	gpio-line-names =
+		"GPIO_168_GPS_EN",
+		"GPIO-C", /* LSEC pin 25: GPIO_169_USIM1_CLK */
+		"GPIO-E", /* LSEC pin 27: GPIO_170_USIM1_RST */
+		"GPIO-B", /* LSEC pin 24: GPIO_171_USIM1_DATA */
+		"", "", "", "", "";
+};
+
+&gpio22 {
+	/* GPIO_176-GPIO_183 */
+	gpio-line-names =
+		"[PMU_PWR_HOLD]",
+		"GPIO_177_WL_WAKEUP_AP",
+		"[JTAG_TCK]",
+		"[JTAG_TMS]",
+		"[JTAG_TDI]",
+		"[JTAG_TMS]",
+		"GPIO_182_FATAL_ERR",
+		"NC";
+};
+
+&gpio23 {
+	/* GPIO_184-GPIO_191 */
+	gpio-line-names =
+		"GPIO_184_JTAG_SEL",
+		"GPIO-F", /* LSEC pin 28: GPIO_185_LCD_BL_PWM */
+		"[I2C0_SCL]", /* LSEC pin 15: GPIO_186_I2C0_SCL */
+		"[I2C0_SDA]", /* LSEC pin 17: GPIO_187_I2C0_SDA */
+		"[GPIO_188_I2C1_SCL]", /* Actual SoC I2C1_SCL */
+		"[GPIO_189_I2C1_SDA]", /* Actual SoC I2C1_SDA */
+		"[I2C1_SCL]", /* LSEC pin 19: GPIO_190_I2C2_SCL */
+		"[I2C2_SDA]"; /* LSEC pin 21: GPIO_191_I2C2_SDA */
+};
+
+&gpio24 {
+	/* GPIO_192-GPIO_199 */
+	gpio-line-names =
+		"[SD_LED]",
+		"NC",
+		"[PCM_DI]", /* LSEC pin 22: GPIO_194_I2S0_DI */
+		"[PCM_DO]", /* LSEC pin 20: GPIO_195_I2S0_DO */
+		"[PCM_CLK]", /* LSEC pin 18: GPIO_196_I2S0_XCLK */
+		"[PCM_FS]", /* LSEC pin 16: GPIO_197_I2S0_XFS */
+		"",
+		"[I2S2_DO]";
+};
+
+&gpio25 {
+	/* GPIO_200-GPIO_207 */
+	gpio-line-names =
+		"[I2S2_XCLK]",
+		"[I2S2_XFS]",
+		"GPIO_202_PERST_ETH",
+		"GPIO_203_PWRON_DET",
+		"GPIO_204_PMU1_IRQ_N",
+		"GPIO_205_SD_DET",
+		"GPIO_206_GPS_MOTION_INT",
+		"GPIO_207_HDMI_SEL";
+};
+
+&gpio26 {
+	/* GPIO_208-GPIO_215 */
+	gpio-line-names =
+		"GPIO-A", /* LSEC pin 23: GPIO_208_WAKEUP_SOC */
+		"GPIO_209_VBUS_TYPEC",
+		"NC",
+		"NC",
+		"NC",
+		"[SPI0_SCLK]", /* LSEC pin 8: GPIO_213_SPI2_CLK */
+		"[SPI0_DIN]", /* LSEC pin 10: GPIO_214_SPI2_DI */
+		"[SPI0_DOUT]"; /* LSEC pin 14: GPIO_215_SPI2_DO */
+};
+
+&gpio27 {
+	/* GPIO_216-GPIO_223 */
+	gpio-line-names =
+		"[SPI0_CS]", /* LSEC pin 12: GPIO_216_SPI2_CS0_N */
+		"GPIO_217_HDMI_PD",
+		"GPIO_218_GPS_WAKEUP_AP",
+		"GPIO_219_M.2CLK_EN",
+		"GPIO_220_PERST_MINI",
+		"GPIO_221_CC_INT",
+		"[PCIE_CLKREQ_L]",
+		"NC";
+};
+
+&gpio28 {
+	/* GPIO_224-GPIO_231 */
+	gpio-line-names =
+		"[PMU0_INT]",
+		"[SPMI_DATA]",
+		"[SPMI_CLK]",
+		"[CAN_SPI_CLK]",
+		"[CAN_SPI_DI]",
+		"[CAN_SPI_DO]",
+		"[CAN_SPI_CS]",
+		"GPIO_231_HDMI_INT";
+};
+
 &uart0 {
 	/* On High speed expansion header */
 	label = "HS-UART0";
