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ARM: davinci: da850: add DT boot support

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Add support for booting DA850 using flattened device
tree to describe the hardware. At this time only the
very basic bootup using a serial console is supported.

Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Sekhar Nori 2012-08-28 15:27:52 +05:30
parent 8e0d72d2c7
commit 689e331f3f
5 changed files with 83 additions and 0 deletions
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9
Documentation/devicetree/bindings/arm/davinci.txt Normal file
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@ -0,0 +1,9 @@
Texas Instruments DaVinci Platforms Device Tree Bindings
--------------------------------------------------------
Generic DaVinci Boards
----------------------
DA850/OMAP-L138/AM18x generic board
Required root node properties:
- compatible = "ti,da850";

1
arch/arm/Kconfig
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@ -924,6 +924,7 @@ config ARCH_DAVINCI
select GENERIC_IRQ_CHIP
select HAVE_IDE
select NEED_MACH_GPIO_H
select USE_OF
select ZONE_DMA
help
Support for TI's DaVinci platform.

8
arch/arm/mach-davinci/Kconfig
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@ -58,6 +58,14 @@ config ARCH_DAVINCI_TNETV107X
comment "DaVinci Board Type"
config MACH_DA8XX_DT
bool "Support DA8XX platforms using device tree"
default y
depends on ARCH_DAVINCI_DA8XX
help
Say y here to include support for TI DaVinci DA850 based using
Flattened Device Tree. More information at Documentation/devicetree
config MACH_DAVINCI_EVM
bool "TI DM644x EVM"
default ARCH_DAVINCI_DM644x

1
arch/arm/mach-davinci/Makefile
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@ -22,6 +22,7 @@ obj-$(CONFIG_AINTC) += irq.o
obj-$(CONFIG_CP_INTC) += cp_intc.o
# Board specific
obj-$(CONFIG_MACH_DA8XX_DT) += da8xx-dt.o
obj-$(CONFIG_MACH_DAVINCI_EVM) += board-dm644x-evm.o
obj-$(CONFIG_MACH_SFFSDR) += board-sffsdr.o
obj-$(CONFIG_MACH_NEUROS_OSD2) += board-neuros-osd2.o

64
arch/arm/mach-davinci/da8xx-dt.c Normal file
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@ -0,0 +1,64 @@
/*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
* Modified from mach-omap/omap2/board-generic.c
*
* 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.
*/
#include <linux/io.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/irqdomain.h>
#include <asm/mach/arch.h>
#include <mach/common.h>
#include <mach/cp_intc.h>
#include <mach/da8xx.h>
#define DA8XX_NUM_UARTS 3
void __init da8xx_uart_clk_enable(void)
{
int i;
for (i = 0; i < DA8XX_NUM_UARTS; i++)
davinci_serial_setup_clk(i, NULL);
}
static struct of_device_id da8xx_irq_match[] __initdata = {
{ .compatible = "ti,cp-intc", .data = cp_intc_of_init, },
{ }
};
static void __init da8xx_init_irq(void)
{
of_irq_init(da8xx_irq_match);
}
#ifdef CONFIG_ARCH_DAVINCI_DA850
static void __init da850_init_machine(void)
{
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
da8xx_uart_clk_enable();
}
static const char *da850_boards_compat[] __initdata = {
"ti,da850",
NULL,
};
DT_MACHINE_START(DA850_DT, "Generic DA850/OMAP-L138/AM18x")
.map_io = da850_init,
.init_irq = da8xx_init_irq,
.timer = &davinci_timer,
.init_machine = da850_init_machine,
.dt_compat = da850_boards_compat,
.init_late = davinci_init_late,
.restart = da8xx_restart,
MACHINE_END
#endif