Changes between Version 17 and Version 18 of linux/devicetree

Timestamp:

07/05/2024 04:38:50 PM (5 months ago)

Author:

Tim Harvey

Comment:

add another example for fixfdt showing how you can alter large arrays of data such as pinmux

linux/devicetree

@@ -82 +82 @@
   - disable PCI via {{{fixfdt}}} script:
 {{{
-setenv fixfdt 'fdt addr $fdt_addr_r; fdt resize; fdt set /soc@0/pcie@33800000 status disabled'
+setenv fixfdt 'fdt addr $fdt_addr_r && fdt resize && fdt set /soc@0/pcie@33800000 status disabled'
 saveenv
 }}}
   - limit PCI link to Gen 1 (default is Gen2 for Venice)
 {{{
-setenv fixfdt 'fdt addr $fdt_addr_r; fdt resize; fdt set /soc@0/pcie@33800000 fsl,max-link-speed [00 00 00 01]'
-saveenv
+setenv fixfdt 'fdt addr $fdt_addr_r && fdt resize && fdt set /soc@0/pcie@33800000 fsl,max-link-speed [00 00 00 01]'
+saveenv
+}}}
+  - change the pinmux registers for sdhc3:
+{{{
+setenv fixfdt 'fdt addr $fdt_addr_r && fdt resize && fdt set /soc@0/bus@30000000/pinctrl@30330000/usdhc3-200mhzgrp fsl,pins <0x00000138 0x000003a0 0x00000000 0x00000012 0x00000000 0x00000182 0x0000013c 0x000003a4 0x00000000 0x00000002 0x00000000 0x000001d6 0x0000011c 0x00000384 0x00000000 0x00000002 0x00000000 0x000001d6 0x00000120 0x00000388 0x00000000 0x00000002 0x00000000 0x000001d6 0x00000124 0x0000038c 0x00000000 0x00000002 0x00000000 0x000001d6 0x00000128 0x00000390 0x00000000 0x00000002 0x00000000 0x000001d6 0x00000130 0x00000398 0x00000000 0x00000002 0x00000000 0x000001d6 0x00000100 0x00000368 0x00000000 0x00000002 0x00000000 0x000001d6 0x00000104 0x0000036c 0x00000000 0x00000002 0x00000000 0x000001d6 0x00000108 0x00000370 0x00000000 0x00000002 0x00000000 0x000001d6 0x000000fc 0x00000364 0x00000000 0x00000002 0x00000000 0x00000196>
 }}}
  * Newport: U-Boot uses a live dt which is also passed to the kernel (dtb is not loaded) so you can alter the dt before running your normal bootscript
@@ -99 +103 @@
   - disable PCI via {{{fixfdt}}} script:
 {{{
-setenv fixfdt 'fdt addr ${fdt_addr}; fdt resize; fdt set /soc/pcie@0x01000000 status disabled'
+setenv fixfdt 'fdt addr ${fdt_addr} && fdt resize && fdt set /soc/pcie@0x01000000 status disabled'
 saveenv
 }}}