ARM: zii-common: fetch network config from SP

On both RDU1 and RDU2 the seat notwork configuration is stored in
a configuration EEPROM accessible via the RAVE SP. Add an initcall
to fetch this configuration and add it to the kernel command line.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 44 insertions, 0 deletions

diff --git a/arch/arm/boards/zii-common/board.c b/arch/arm/boards/zii-common/board.c
new file mode 100644
index 0000000000..254b09a7a7
--- /dev/null
+++ b/arch/arm/boards/zii-common/board.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 Zodiac Inflight Innovation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <globalvar.h>
+#include <init.h>
+
+static int rdu_networkconfig(void)
+{
+	static char *rdu_netconfig;
+	struct device_d *sp_dev;
+
+	if (!of_machine_is_compatible("zii,imx6q-zii-rdu2") &&
+	    !of_machine_is_compatible("zii,imx6qp-zii-rdu2") &&
+	    !of_machine_is_compatible("zii,imx51-rdu1"))
+		return 0;
+
+	sp_dev = get_device_by_name("sp");
+	if (!sp_dev) {
+		pr_warn("no sp device found, network config not available!\n");
+		return -ENODEV;
+	}
+
+	rdu_netconfig = basprintf("ip=%s:::%s::eth0:",
+				  dev_get_param(sp_dev, "ipaddr"),
+				  dev_get_param(sp_dev, "netmask"));
+
+	globalvar_add_simple_string("linux.bootargs.rdu_network",
+				    &rdu_netconfig);
+
+	return 0;
+}
+late_initcall(rdu_networkconfig);