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64 lines
1.8 KiB
Diff
64 lines
1.8 KiB
Diff
From f15d27f9c90ede4b16eb37f9ae573ef81c2b6996 Mon Sep 17 00:00:00 2001
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From: David Bauer <mail@david-bauer.net>
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Date: Thu, 31 Dec 2020 18:49:12 +0100
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Subject: [PATCH] MIPS: add bootargs-override property
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Add support for the bootargs-override property to the chosen node
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similar to the one used on ipq806x or mpc85xx.
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This is necessary, as the U-Boot used on some boards, notably the
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Ubiquiti UniFi 6 Lite, overwrite the bootargs property of the chosen
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node leading to a kernel panic when loading OpenWrt.
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Signed-off-by: David Bauer <mail@david-bauer.net>
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---
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arch/mips/kernel/setup.c | 30 ++++++++++++++++++++++++++++++
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1 file changed, 30 insertions(+)
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--- a/arch/mips/kernel/setup.c
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+++ b/arch/mips/kernel/setup.c
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@@ -545,8 +545,28 @@ static int __init bootcmdline_scan_chose
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#endif /* CONFIG_OF_EARLY_FLATTREE */
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+static int __init bootcmdline_scan_chosen_override(unsigned long node, const char *uname,
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+ int depth, void *data)
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+{
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+ bool *dt_bootargs = data;
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+ const char *p;
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+ int l;
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+
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+ if (depth != 1 || !data || strcmp(uname, "chosen") != 0)
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+ return 0;
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+
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+ p = of_get_flat_dt_prop(node, "bootargs-override", &l);
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+ if (p != NULL && l > 0) {
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+ strlcpy(boot_command_line, p, COMMAND_LINE_SIZE);
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+ *dt_bootargs = true;
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+ }
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+
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+ return 1;
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+}
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+
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static void __init bootcmdline_init(void)
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{
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+ bool dt_bootargs_override = false;
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bool dt_bootargs = false;
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/*
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@@ -560,6 +580,14 @@ static void __init bootcmdline_init(void
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}
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/*
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+ * If bootargs-override in the chosen node is set, use this as the
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+ * command line
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+ */
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+ of_scan_flat_dt(bootcmdline_scan_chosen_override, &dt_bootargs_override);
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+ if (dt_bootargs_override)
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+ return;
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+
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+ /*
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* If the user specified a built-in command line &
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* MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
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* prepended to arguments from the bootloader or DT so we'll copy them
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