ARM i.MX31: Add devicetree support

This patch adds basic devicetree support for i.MX31 based SoCs.

Only the UART and interrupts bindings are added.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Denis 'GNUtoo' Carikli 2012-07-09 21:39:12 +02:00 committed by Sascha Hauer
parent 5349f2a89e
commit d2a37b3d91
6 changed files with 180 additions and 0 deletions

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@ -0,0 +1,88 @@
/*
* Copyright 2012 Denis 'GNUtoo' Carikli <GNUtoo@no-log.org>
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/include/ "skeleton.dtsi"
/ {
aliases {
serial0 = &uart1;
serial1 = &uart2;
serial2 = &uart3;
serial3 = &uart4;
serial4 = &uart5;
};
avic: avic-interrupt-controller@60000000 {
compatible = "fsl,imx31-avic", "fsl,avic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x60000000 0x100000>;
};
soc {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
interrupt-parent = <&avic>;
ranges;
aips@43f00000 { /* AIPS1 */
compatible = "fsl,aips-bus", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
reg = <0x43f00000 0x100000>;
ranges;
uart1: serial@43f90000 {
compatible = "fsl,imx31-uart", "fsl,imx21-uart";
reg = <0x43f90000 0x4000>;
interrupts = <45>;
status = "disabled";
};
uart2: serial@43f94000 {
compatible = "fsl,imx31-uart", "fsl,imx21-uart";
reg = <0x43f94000 0x4000>;
interrupts = <32>;
status = "disabled";
};
uart4: serial@43fb0000 {
compatible = "fsl,imx31-uart", "fsl,imx21-uart";
reg = <0x43fb0000 0x4000>;
interrupts = <46>;
status = "disabled";
};
uart5: serial@43fb4000 {
compatible = "fsl,imx31-uart", "fsl,imx21-uart";
reg = <0x43fb4000 0x4000>;
interrupts = <47>;
status = "disabled";
};
};
spba@50000000 {
compatible = "fsl,spba-bus", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
reg = <0x50000000 0x100000>;
ranges;
uart3: serial@5000c000 {
compatible = "fsl,imx31-uart", "fsl,imx21-uart";
reg = <0x5000c000 0x4000>;
interrupts = <18>;
status = "disabled";
};
};
};
};

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@ -557,6 +557,14 @@ config MACH_BUG
Include support for BUGBase 1.3 platform. This includes specific
configurations for the board and its peripherals.
config MACH_IMX31_DT
bool "Support i.MX31 platforms from device tree"
select SOC_IMX31
select USE_OF
help
Include support for Freescale i.MX31 based platforms
using the device tree for discovery.
comment "MX35 platforms:"
config MACH_PCM043

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@ -57,6 +57,7 @@ obj-$(CONFIG_MACH_QONG) += mach-qong.o
obj-$(CONFIG_MACH_ARMADILLO5X0) += mach-armadillo5x0.o
obj-$(CONFIG_MACH_KZM_ARM11_01) += mach-kzm_arm11_01.o
obj-$(CONFIG_MACH_BUG) += mach-bug.o
obj-$(CONFIG_MACH_IMX31_DT) += imx31-dt.o
# i.MX35 based machines
obj-$(CONFIG_MACH_PCM043) += mach-pcm043.o

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@ -20,6 +20,7 @@
#include <linux/clkdev.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/of.h>
#include <mach/hardware.h>
#include <mach/mx31.h>
@ -179,3 +180,21 @@ int __init mx31_clocks_init(unsigned long fref)
return 0;
}
#ifdef CONFIG_OF
int __init mx31_clocks_init_dt(void)
{
struct device_node *np;
u32 fref = 26000000; /* default */
for_each_compatible_node(np, NULL, "fixed-clock") {
if (!of_device_is_compatible(np, "fsl,imx-osc26m"))
continue;
if (!of_property_read_u32(np, "clock-frequency", &fref))
break;
}
return mx31_clocks_init(fref);
}
#endif

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@ -0,0 +1,63 @@
/*
* Copyright 2012 Sascha Hauer, Pengutronix
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/irq.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <mach/common.h>
#include <mach/mx31.h>
static const struct of_dev_auxdata imx31_auxdata_lookup[] __initconst = {
OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART1_BASE_ADDR,
"imx21-uart.0", NULL),
OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART2_BASE_ADDR,
"imx21-uart.1", NULL),
OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART3_BASE_ADDR,
"imx21-uart.2", NULL),
OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART4_BASE_ADDR,
"imx21-uart.3", NULL),
OF_DEV_AUXDATA("fsl,imx31-uart", MX31_UART5_BASE_ADDR,
"imx21-uart.4", NULL),
{ /* sentinel */ }
};
static void __init imx31_dt_init(void)
{
of_platform_populate(NULL, of_default_bus_match_table,
imx31_auxdata_lookup, NULL);
}
static void __init imx31_timer_init(void)
{
mx31_clocks_init_dt();
}
static struct sys_timer imx31_timer = {
.init = imx31_timer_init,
};
static const char *imx31_dt_board_compat[] __initdata = {
"fsl,imx31",
NULL
};
DT_MACHINE_START(IMX31_DT, "Freescale i.MX31 (Device Tree Support)")
.map_io = mx31_map_io,
.init_early = imx31_init_early,
.init_irq = mx31_init_irq,
.handle_irq = imx31_handle_irq,
.timer = &imx31_timer,
.init_machine = imx31_dt_init,
.dt_compat = imx31_dt_board_compat,
.restart = mxc_restart,
MACHINE_END

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@ -67,6 +67,7 @@ extern int mx51_clocks_init(unsigned long ckil, unsigned long osc,
extern int mx53_clocks_init(unsigned long ckil, unsigned long osc,
unsigned long ckih1, unsigned long ckih2);
extern int mx27_clocks_init_dt(void);
extern int mx31_clocks_init_dt(void);
extern int mx51_clocks_init_dt(void);
extern int mx53_clocks_init_dt(void);
extern int mx6q_clocks_init(void);