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: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/boot/dts/imx27.dtsi b/arch/arm/boot/dts/imx27.dtsi
new file mode 100644
index 0000000..bc5e7d5
--- /dev/null
+++ b/arch/arm/boot/dts/imx27.dtsi
@@ -0,0 +1,217 @@
+/*
+ * 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";
+ };
+ };
+ };
+};
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 4defb97b..85433b9 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -376,6 +376,14 @@
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
diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 55db9c4..4ffeca7 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -41,6 +41,7 @@
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
diff --git a/arch/arm/mach-imx/clock-imx27.c b/arch/arm/mach-imx/clock-imx27.c
index 88fe00a..01ae3a4 100644
--- a/arch/arm/mach-imx/clock-imx27.c
+++ b/arch/arm/mach-imx/clock-imx27.c
@@ -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 @@
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
diff --git a/arch/arm/mach-imx/imx27-dt.c b/arch/arm/mach-imx/imx27-dt.c
new file mode 100644
index 0000000..861ceb8
--- /dev/null
+++ b/arch/arm/mach-imx/imx27-dt.c
@@ -0,0 +1,89 @@
+/*
+ * 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
diff --git a/arch/arm/plat-mxc/include/mach/common.h b/arch/arm/plat-mxc/include/mach/common.h
index 1bf0df8..16d10a8 100644
--- a/arch/arm/plat-mxc/include/mach/common.h
+++ b/arch/arm/plat-mxc/include/mach/common.h
@@ -65,6 +65,7 @@
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);