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octeon: ubnt-*: Add device specific DTS pruning

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This imports device specific DTS pruning from
https://github.com/UI-Packages/kernel_e200/blob/master/arch/mips/cavium-octeon/octeon-platform.c#L1067

- Reduce MMC clock frequency on E200/E220 to make
  MMC communication reliable again. See linked issue.
- Remove unused MMC node on E300.

Link: https://github.com/openwrt/openwrt/issues/13762
Signed-off-by: Jakob Haufe <sur5r@sur5r.net>
Link: https://github.com/openwrt/openwrt/pull/19229
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Jakob Haufe 2025-06-18 12:34:20 +02:00 committed by Robert Marko
parent 8876192bff
commit 6e58e64501
1 changed files with 81 additions and 0 deletions
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81
target/linux/octeon/patches-6.6/400-ubnt_dts_pruning.patch Normal file
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@ -0,0 +1,81 @@
commit eb6c3ba1d42fd087708f568ca220ff557f22104e
Author: Jakob Haufe <sur5r@sur5r.net>
Date: Tue Jun 17 13:58:19 2025 +0200
MIPS: OCTEON: Add UBNT specific DTS pruning
This imports device specific DTS pruning from
https://github.com/UI-Packages/kernel_e200/blob/master/arch/mips/cavium-octeon/octeon-platform.c#L1067
- Reduce MMC clock frequency on E200/E220 to make
MMC communication reliable again. See linked issue.
- Remove unused MMC node on E300.
Related: https://github.com/openwrt/openwrt/issues/13762
Signed-off-by: Jakob Haufe <sur5r@sur5r.net>
--- a/arch/mips/cavium-octeon/octeon-platform.c
+++ b/arch/mips/cavium-octeon/octeon-platform.c
@@ -1133,6 +1133,41 @@ end_led:
}
#endif
+
+ return 0;
+}
+
+int __init ubnt_prune_device_tree(void)
+{
+ /* MMC on UBNT */
+ pr_info("UBNT board DTS pruning...\n");
+ if (octeon_bootinfo->board_type == CVMX_BOARD_TYPE_UBNT_E300) {
+ pr_info("UBNT E300 found, looking for mmc-slot@2\n");
+ // Remove unused MMC slot definition
+ int mmc_slot2 = fdt_path_offset(initial_boot_params, "/soc/mmc/mmc-slot@2");
+
+ if (mmc_slot2 > 0) {
+ pr_info("UBNT E300 found, deleting mmc-slot@2\n");
+ fdt_nop_node(initial_boot_params, mmc_slot2);
+ } else {
+ pr_info("mmc-slot@2 not found\n");
+ }
+ } else if (octeon_bootinfo->board_type == CVMX_BOARD_TYPE_UBNT_E200 ||
+ octeon_bootinfo->board_type == CVMX_BOARD_TYPE_UBNT_E220) {
+ pr_info("UBNT E200/E220 found, looking for mmc-slot@0\n");
+ int mmc_slot0 = fdt_path_offset(initial_boot_params, "/soc/mmc/mmc-slot@0");
+
+ u32 freq = 26000000;
+
+ if (mmc_slot0 > 0) {
+ pr_info("UBNT E200/E220 mmc-slot@0 found, setting frequency to 26MHz");
+ fdt_setprop_inplace_cell(initial_boot_params, mmc_slot0,
+ "spi-max-frequency", freq);
+ } else {
+ pr_info("mmc-slot@0 not found\n");
+ }
+ }
+
return 0;
}
--- a/arch/mips/cavium-octeon/setup.c
+++ b/arch/mips/cavium-octeon/setup.c
@@ -1168,6 +1168,7 @@ void __init prom_free_prom_memory(void)
}
}
+int __init ubnt_prune_device_tree(void);
void __init octeon_fill_mac_addresses(void);
void __init device_tree_init(void)
@@ -1207,6 +1208,9 @@ void __init device_tree_init(void)
octeon_prune_device_tree();
pr_info("Using internal Device Tree.\n");
}
+
+ ubnt_prune_device_tree();
+
if (fill_mac)
octeon_fill_mac_addresses();
unflatten_and_copy_device_tree();