提交 9f0749e3 编写于 作者: S Sascha Hauer

ARM i.MX27: Add devicetree support

This patch adds basic devicetree support for i.MX27 based SoCs.
Only the bindings for which drivers exist are added here:

- UART
- fec
- CSPI
- I2C
- watchdog
- gpio
Signed-off-by: NSascha Hauer <s.hauer@pengutronix.de>
上级 6b21d18e
/*
* 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/ "skeleton.dtsi"
/ {
aliases {
serial0 = &uart1;
serial1 = &uart2;
serial2 = &uart3;
serial3 = &uart4;
serial4 = &uart5;
serial5 = &uart6;
};
avic: avic-interrupt-controller@e0000000 {
compatible = "fsl,imx27-avic", "fsl,avic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x10040000 0x1000>;
};
clocks {
#address-cells = <1>;
#size-cells = <0>;
osc26m {
compatible = "fsl,imx-osc26m", "fixed-clock";
clock-frequency = <26000000>;
};
};
soc {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
interrupt-parent = <&avic>;
ranges;
aipi@10000000 { /* AIPI1 */
compatible = "fsl,aipi-bus", "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
reg = <0x10000000 0x10000000>;
ranges;
wdog@10002000 {
compatible = "fsl,imx27-wdt", "fsl,imx21-wdt";
reg = <0x10002000 0x4000>;
interrupts = <27>;
status = "disabled";
};
uart1: uart@1000a000 {
compatible = "fsl,imx27-uart", "fsl,imx21-uart";
reg = <0x1000a000 0x1000>;
interrupts = <20>;
status = "disabled";
};
uart2: uart@1000b000 {
compatible = "fsl,imx27-uart", "fsl,imx21-uart";
reg = <0x1000b000 0x1000>;
interrupts = <19>;
status = "disabled";
};
uart3: uart@1000c000 {
compatible = "fsl,imx27-uart", "fsl,imx21-uart";
reg = <0x1000c000 0x1000>;
interrupts = <18>;
status = "disabled";
};
uart4: uart@1000d000 {
compatible = "fsl,imx27-uart", "fsl,imx21-uart";
reg = <0x1000d000 0x1000>;
interrupts = <17>;
status = "disabled";
};
cspi1: cspi@1000e000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx27-cspi";
reg = <0x1000e000 0x1000>;
interrupts = <16>;
status = "disabled";
};
cspi2: cspi@1000f000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx27-cspi";
reg = <0x1000f000 0x1000>;
interrupts = <15>;
status = "disabled";
};
i2c1: i2c@10012000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx27-i2c", "fsl,imx1-i2c";
reg = <0x10012000 0x1000>;
interrupts = <12>;
status = "disabled";
};
gpio1: gpio@10015000 {
compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";
reg = <0x10015000 0x100>;
interrupts = <8>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
};
gpio2: gpio@10015100 {
compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";
reg = <0x10015100 0x100>;
interrupts = <8>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
};
gpio3: gpio@10015200 {
compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";
reg = <0x10015200 0x100>;
interrupts = <8>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
};
gpio4: gpio@10015300 {
compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";
reg = <0x10015300 0x100>;
interrupts = <8>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
};
gpio5: gpio@10015400 {
compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";
reg = <0x10015400 0x100>;
interrupts = <8>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
};
gpio6: gpio@10015500 {
compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";
reg = <0x10015500 0x100>;
interrupts = <8>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <1>;
};
cspi3: cspi@10017000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx27-cspi";
reg = <0x10017000 0x1000>;
interrupts = <6>;
status = "disabled";
};
uart5: uart@1001b000 {
compatible = "fsl,imx27-uart", "fsl,imx21-uart";
reg = <0x1001b000 0x1000>;
interrupts = <49>;
status = "disabled";
};
uart6: uart@1001c000 {
compatible = "fsl,imx27-uart", "fsl,imx21-uart";
reg = <0x1001c000 0x1000>;
interrupts = <48>;
status = "disabled";
};
i2c2: i2c@1001d000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx27-i2c", "fsl,imx1-i2c";
reg = <0x1001d000 0x1000>;
interrupts = <1>;
status = "disabled";
};
fec: fec@1002b000 {
compatible = "fsl,imx27-fec";
reg = <0x1002b000 0x4000>;
interrupts = <50>;
status = "disabled";
};
};
};
};
......@@ -376,6 +376,14 @@ config MACH_IMX27IPCAM
Include support for IMX27 IPCAM platform. This includes specific
configurations for the board and its peripherals.
config MACH_IMX27_DT
bool "Support i.MX27 platforms from device tree"
select SOC_IMX27
select USE_OF
help
Include support for Freescale i.MX27 based platforms
using the device tree for discovery
endif
if ARCH_IMX_V6_V7
......
......@@ -41,6 +41,7 @@ obj-$(CONFIG_MACH_EUKREA_MBIMX27_BASEBOARD) += eukrea_mbimx27-baseboard.o
obj-$(CONFIG_MACH_PCA100) += mach-pca100.o
obj-$(CONFIG_MACH_MXT_TD60) += mach-mxt_td60.o
obj-$(CONFIG_MACH_IMX27IPCAM) += mach-imx27ipcam.o
obj-$(CONFIG_MACH_IMX27_DT) += imx27-dt.o
# i.MX31 based machines
obj-$(CONFIG_MACH_MX31ADS) += mach-mx31ads.o
......
......@@ -22,6 +22,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/clkdev.h>
#include <linux/of.h>
#include <asm/div64.h>
......@@ -764,3 +765,20 @@ int __init mx27_clocks_init(unsigned long fref)
return 0;
}
#ifdef CONFIG_OF
int __init mx27_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 mx27_clocks_init(fref);
}
#endif
/*
* 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/irqdomain.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/mx27.h>
static const struct of_dev_auxdata imx27_auxdata_lookup[] __initconst = {
OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART1_BASE_ADDR, "imx21-uart.0", NULL),
OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART2_BASE_ADDR, "imx21-uart.1", NULL),
OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART3_BASE_ADDR, "imx21-uart.2", NULL),
OF_DEV_AUXDATA("fsl,imx27-fec", MX27_FEC_BASE_ADDR, "imx27-fec.0", NULL),
OF_DEV_AUXDATA("fsl,imx27-i2c", MX27_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
OF_DEV_AUXDATA("fsl,imx27-i2c", MX27_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI1_BASE_ADDR, "imx27-cspi.0", NULL),
OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI2_BASE_ADDR, "imx27-cspi.1", NULL),
OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI3_BASE_ADDR, "imx27-cspi.2", NULL),
OF_DEV_AUXDATA("fsl,imx27-wdt", MX27_WDOG_BASE_ADDR, "imx2-wdt.0", NULL),
{ /* sentinel */ }
};
static int __init imx27_avic_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
irq_domain_add_simple(np, 0);
return 0;
}
static int __init imx27_gpio_add_irq_domain(struct device_node *np,
struct device_node *interrupt_parent)
{
static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
irq_domain_add_simple(np, gpio_irq_base);
return 0;
}
static const struct of_device_id imx27_irq_match[] __initconst = {
{ .compatible = "fsl,imx27-avic", .data = imx27_avic_add_irq_domain, },
{ .compatible = "fsl,imx27-gpio", .data = imx27_gpio_add_irq_domain, },
{ /* sentinel */ }
};
static void __init imx27_dt_init(void)
{
of_irq_init(imx27_irq_match);
of_platform_populate(NULL, of_default_bus_match_table,
imx27_auxdata_lookup, NULL);
}
static void __init imx27_timer_init(void)
{
mx27_clocks_init_dt();
}
static struct sys_timer imx27_timer = {
.init = imx27_timer_init,
};
static const char *imx27_dt_board_compat[] __initdata = {
"fsl,imx27",
NULL
};
DT_MACHINE_START(IMX27_DT, "Freescale i.MX27 (Device Tree Support)")
.map_io = mx27_map_io,
.init_early = imx27_init_early,
.init_irq = mx27_init_irq,
.handle_irq = imx27_handle_irq,
.timer = &imx27_timer,
.init_machine = imx27_dt_init,
.dt_compat = imx27_dt_board_compat,
.restart = mxc_restart,
MACHINE_END
......@@ -65,6 +65,7 @@ extern int mx51_clocks_init(unsigned long ckil, unsigned long osc,
unsigned long ckih1, unsigned long ckih2);
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 mx51_clocks_init_dt(void);
extern int mx53_clocks_init_dt(void);
extern int mx6q_clocks_init(void);
......
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