--- zzzz-none-000/linux-3.10.107/Documentation/devicetree/bindings/pinctrl/nvidia,tegra20-pinmux.txt	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/Documentation/devicetree/bindings/pinctrl/nvidia,tegra20-pinmux.txt	2021-02-04 17:41:59.000000000 +0000
@@ -9,7 +9,7 @@
 common pinctrl bindings used by client devices, including the meaning of the
 phrase "pin configuration node".
 
-Tegra's pin configuration nodes act as a container for an abitrary number of
+Tegra's pin configuration nodes act as a container for an arbitrary number of
 subnodes. Each of these subnodes represents some desired configuration for a
 pin, a group, or a list of pins or groups. This configuration can include the
 mux function to select on those pin(s)/group(s), and various pin configuration
@@ -103,6 +103,17 @@
     drive_gma, drive_gmb, drive_gmc, drive_gmd, drive_gme, drive_owr,
     drive_uda.
 
+Valid values for nvidia,functions are:
+
+  ahb_clk, apb_clk, audio_sync, crt, dap1, dap2, dap3, dap4, dap5,
+  displaya, displayb, emc_test0_dll, emc_test1_dll, gmi, gmi_int,
+  hdmi, i2cp, i2c1, i2c2, i2c3, ide, irda, kbc, mio, mipi_hs, nand,
+  osc, owr, pcie, plla_out, pllc_out1, pllm_out1, pllp_out2, pllp_out3,
+  pllp_out4, pwm, pwr_intr, pwr_on, rsvd1, rsvd2, rsvd3, rsvd4, rtck,
+  sdio1, sdio2, sdio3, sdio4, sflash, spdif, spi1, spi2, spi2_alt,
+  spi3, spi4, trace, twc, uarta, uartb, uartc, uartd, uarte, ulpi,
+  vi, vi_sensor_clk, xio
+
 Example:
 
 	pinctrl@70000000 {