Hi!
I'd like to convert Nokia N900 to device tree.
Unfortunately, serial port is not easily available (very special cable
would be needed, does someone know where to get one?) and I don't have
BDI (and very special cable would be needed, too).
So I tried doing very small first step, hoping that I get booting
system... obviously I did not.
I tried formally switching to device tree while still booting using
hardcoded functions. No luck. Does anyone see what I did wrong?
Is it possible that n900 has its main memory somewhere else than
0x80000000?
Thanks,
Pavel
diff --git a/.config b/.config
index a36bbe2..130a7a8 100644
--- a/.config
+++ b/.config
@@ -498,11 +498,11 @@ CONFIG_ATAGS=y
# CONFIG_DEPRECATED_PARAM_STRUCT is not set
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
-# CONFIG_ARM_APPENDED_DTB is not set
-CONFIG_CMDLINE="init=/sbin/preinit ubi.mtd=rootfs root=ubi0:rootfs
rootfstype=ubifs rootflags=bulk_read,no_chk_data_crc rw mtdoops.mtddev=log
console=tty0 console=ttyO2"
-CONFIG_CMDLINE_FROM_BOOTLOADER=y
-# CONFIG_CMDLINE_EXTEND is not set
-# CONFIG_CMDLINE_FORCE is not set
+CONFIG_ARM_APPENDED_DTB=y
+CONFIG_ARM_ATAG_DTB_COMPAT=y
+# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER is not set
+CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND=y
+CONFIG_CMDLINE=""
CONFIG_KEXEC=y
CONFIG_ATAGS_PROC=y
# CONFIG_CRASH_DUMP is not set
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index 9c62558..7b1a075 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -119,6 +119,7 @@ dtb-$(CONFIG_ARCH_OMAP2PLUS) += omap2420-h4.dtb \
omap3-beagle-xm.dtb \
omap3-evm.dtb \
omap3-tobi.dtb \
+ omap3-n900.dtb \
omap4-panda.dtb \
omap4-panda-a4.dtb \
omap4-panda-es.dtb \
diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
new file mode 100644
index 0000000..e093543
--- /dev/null
+++ b/arch/arm/boot/dts/omap3-n900.dts
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+/dts-v1/;
+
+/include/ "skeleton.dtsi"
+/* FIXME: "omap3.dtsi" */
+
+/ {
+ model = "Nokia N900";
+ compatible = "nokia,omap3-n900", "ti,omap3";
+
+ memory {
+ device_type = "memory";
+ reg = <0x80000000 0x10000000>; /* 256 MB */
+ };
+};
+
+/*
+&mmc1 {
+ status = "disabled";
+};
+
+&mmc2 {
+ status = "disabled";
+};
+
+&mmc3 {
+ status = "disabled";
+};
+*/
diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
index 74f83a5..f857b5b 100644
--- a/arch/arm/mach-omap2/board-rx51.c
+++ b/arch/arm/mach-omap2/board-rx51.c
@@ -36,6 +36,8 @@
#define RX51_GPIO_SLEEP_IND 162
+/* This lights up left part of keyboard */
+
static struct gpio_led gpio_leds[] = {
{
.name = "sleep_ind",
@@ -119,21 +121,21 @@ static void __init rx51_init(void)
platform_device_register(&leds_gpio);
}
-static void __init rx51_reserve(void)
-{
- omap_reserve();
-}
+static const char *omap3_boards_compat[] __initdata = {
+ "nokia,omap3-n900",
+ NULL,
+};
-MACHINE_START(NOKIA_RX51, "Nokia RX-51 board")
- /* Maintainer: Lauri Leukkunen <lauri.leukku...@nokia.com> */
- .atag_offset = 0x100,
- .reserve = rx51_reserve,
+DT_MACHINE_START(N900_DT, "Nokia N900 (Flattened Device Tree)")
+ .atag_offset = 0x100,
+ .reserve = omap_reserve,
.map_io = omap3_map_io,
- .init_early = omap3430_init_early,
- .init_irq = omap3_init_irq,
- .handle_irq = omap3_intc_handle_irq,
- .init_machine = rx51_init,
- .init_late = omap3430_init_late,
- .init_time = omap3_sync32k_timer_init,
- .restart = omap3xxx_restart,
+ .init_early = omap3430_init_early,
+ .init_irq = omap3_init_irq, /* FIXME: omap_intc_of_init, */
+ .handle_irq = omap3_intc_handle_irq,
+ .init_machine = rx51_init, /* FIXME: omap_generic_init, */
+ .init_late = omap3430_init_late, /* FIXME: omap3_init_late, */
+ .init_time = omap3_sync32k_timer_init,
+ .dt_compat = omap3_boards_compat,
+ .restart = omap3xxx_restart,
MACHINE_END
diff --git a/mkit b/mkit
index 354610c..e9ffc02 100755
--- a/mkit
+++ b/mkit
@@ -1,3 +1,4 @@
#!/bin/bash
ARCH=arm time make -j 3 && \
- sudo ../maemo/0xffff/src/0xFFFF -m arch/arm/boot/zImage -l -b
'root=/dev/mmcblk0p6 rootwait'
\ No newline at end of file
+ cat arch/arm/boot/zImage arch/arm/boot/dts/omap3-n900.dtb > zImage_dtb && \
+ sudo ../maemo/0xffff/src/0xFFFF -m zImage_dtb -l -b 'root=/dev/mmcblk0p6
rootwait'
\ No newline at end of file
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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