arm/mx5: add device tree support for imx53 boards

It adds device tree support for imx53 boards.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

8 files changed, 200 insertions, 10 deletions

diff --git a/arch/arm/mach-mx5/Kconfig b/arch/arm/mach-mx5/Kconfig
index b4e7c58bbb38..0ac676c5256d 100644
--- a/arch/arm/mach-mx5/Kconfig
+++ b/arch/arm/mach-mx5/Kconfig
@@ -172,6 +172,18 @@ endif # ARCH_MX51
 if ARCH_MX53_SUPPORTED
 comment "i.MX53 machines:"
 
+config MACH_IMX53_DT
+        bool "Support i.MX53 platforms from device tree"
+        select SOC_IMX53
+        select USE_OF
+        select MACH_MX53_ARD
+        select MACH_MX53_EVK
+        select MACH_MX53_LOCO
+        select MACH_MX53_SMD
+        help
+          Include support for Freescale i.MX53 based platforms
+          using the device tree for discovery
+
 config MACH_MX53_EVK
         bool "Support MX53 EVK platforms"
         select SOC_IMX53
diff --git a/arch/arm/mach-mx5/Makefile b/arch/arm/mach-mx5/Makefile
index 383e7cd3fbcb..3dbe5e26a51b 100644
--- a/arch/arm/mach-mx5/Makefile
+++ b/arch/arm/mach-mx5/Makefile
@@ -22,3 +22,5 @@ obj-$(CONFIG_MX51_EFIKA_COMMON) += mx51_efika.o
 obj-$(CONFIG_MACH_MX51_EFIKAMX) += board-mx51_efikamx.o
 obj-$(CONFIG_MACH_MX51_EFIKASB) += board-mx51_efikasb.o
 obj-$(CONFIG_MACH_MX50_RDP) += board-mx50_rdp.o
+
+obj-$(CONFIG_MACH_IMX53_DT) += imx53-dt.o
diff --git a/arch/arm/mach-mx5/board-mx53_ard.c b/arch/arm/mach-mx5/board-mx53_ard.c
index 76a67c4a2a0b..9b4395d7a07c 100644
--- a/arch/arm/mach-mx5/board-mx53_ard.c
+++ b/arch/arm/mach-mx5/board-mx53_ard.c
@@ -171,9 +171,6 @@ static struct imxi2c_platform_data mx53_ard_i2c3_data = {
 
 static void __init mx53_ard_io_init(void)
 {
-        mxc_iomux_v3_setup_multiple_pads(mx53_ard_pads,
-                                ARRAY_SIZE(mx53_ard_pads));
-
         gpio_request(ARD_ETHERNET_INT_B, "eth-int-b");
         gpio_direction_input(ARD_ETHERNET_INT_B);
 
@@ -216,6 +213,13 @@ static int weim_cs_config(void)
         return 0;
 }
 
+void __init imx53_ard_common_init(void)
+{
+        mxc_iomux_v3_setup_multiple_pads(mx53_ard_pads,
+                                         ARRAY_SIZE(mx53_ard_pads));
+        weim_cs_config();
+}
+
 static struct platform_device *devices[] __initdata = {
         &ard_smsc_lan9220_device,
 };
@@ -225,8 +229,8 @@ static void __init mx53_ard_board_init(void)
         imx53_soc_init();
         imx53_add_imx_uart(0, NULL);
 
+        imx53_ard_common_init();
         mx53_ard_io_init();
-        weim_cs_config();
         platform_add_devices(devices, ARRAY_SIZE(devices));
 
         imx53_add_sdhci_esdhc_imx(0, &mx53_ard_sd1_data);
diff --git a/arch/arm/mach-mx5/board-mx53_evk.c b/arch/arm/mach-mx5/board-mx53_evk.c
index 1b417b06b736..7663905d5c6d 100644
--- a/arch/arm/mach-mx5/board-mx53_evk.c
+++ b/arch/arm/mach-mx5/board-mx53_evk.c
@@ -131,12 +131,17 @@ static const struct spi_imx_master mx53_evk_spi_data __initconst = {
         .num_chipselect = ARRAY_SIZE(mx53_evk_spi_cs),
 };
 
+void __init imx53_evk_common_init(void)
+{
+        mxc_iomux_v3_setup_multiple_pads(mx53_evk_pads,
+                                         ARRAY_SIZE(mx53_evk_pads));
+}
+
 static void __init mx53_evk_board_init(void)
 {
         imx53_soc_init();
+        imx53_evk_common_init();
 
-        mxc_iomux_v3_setup_multiple_pads(mx53_evk_pads,
-                                        ARRAY_SIZE(mx53_evk_pads));
         mx53_evk_init_uart();
         mx53_evk_fec_reset();
         imx53_add_fec(&mx53_evk_fec_pdata);
diff --git a/arch/arm/mach-mx5/board-mx53_loco.c b/arch/arm/mach-mx5/board-mx53_loco.c
index 4e1d51d252dc..3922cd5ea854 100644
--- a/arch/arm/mach-mx5/board-mx53_loco.c
+++ b/arch/arm/mach-mx5/board-mx53_loco.c
@@ -257,12 +257,17 @@ static const struct gpio_led_platform_data mx53loco_leds_data __initconst = {
         .num_leds       = ARRAY_SIZE(mx53loco_leds),
 };
 
+void __init imx53_qsb_common_init(void)
+{
+        mxc_iomux_v3_setup_multiple_pads(mx53_loco_pads,
+                                         ARRAY_SIZE(mx53_loco_pads));
+}
+
 static void __init mx53_loco_board_init(void)
 {
         imx53_soc_init();
+        imx53_qsb_common_init();
 
-        mxc_iomux_v3_setup_multiple_pads(mx53_loco_pads,
-                                        ARRAY_SIZE(mx53_loco_pads));
         imx53_add_imx_uart(0, NULL);
         mx53_loco_fec_reset();
         imx53_add_fec(&mx53_loco_fec_data);
diff --git a/arch/arm/mach-mx5/board-mx53_smd.c b/arch/arm/mach-mx5/board-mx53_smd.c
index bc02894eafef..b10c89982fbc 100644
--- a/arch/arm/mach-mx5/board-mx53_smd.c
+++ b/arch/arm/mach-mx5/board-mx53_smd.c
@@ -111,12 +111,17 @@ static const struct imxi2c_platform_data mx53_smd_i2c_data __initconst = {
         .bitrate = 100000,
 };
 
+void __init imx53_smd_common_init(void)
+{
+        mxc_iomux_v3_setup_multiple_pads(mx53_smd_pads,
+                                         ARRAY_SIZE(mx53_smd_pads));
+}
+
 static void __init mx53_smd_board_init(void)
 {
         imx53_soc_init();
+        imx53_smd_common_init();
 
-        mxc_iomux_v3_setup_multiple_pads(mx53_smd_pads,
-                                        ARRAY_SIZE(mx53_smd_pads));
         mx53_smd_init_uart();
         mx53_smd_fec_reset();
         imx53_add_fec(&mx53_smd_fec_data);
diff --git a/arch/arm/mach-mx5/clock-mx51-mx53.c b/arch/arm/mach-mx5/clock-mx51-mx53.c
index f7bf996f463b..d9b03d4dba6d 100644
--- a/arch/arm/mach-mx5/clock-mx51-mx53.c
+++ b/arch/arm/mach-mx5/clock-mx51-mx53.c
@@ -15,6 +15,7 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/clkdev.h>
+#include <linux/of.h>
 
 #include <asm/div64.h>
 
@@ -1609,3 +1610,33 @@ int __init mx53_clocks_init(unsigned long ckil, unsigned long osc,
                 MX53_INT_GPT);
         return 0;
 }
+
+static void __init clk_get_freq_dt(unsigned long *ckil, unsigned long *osc,
+                                   unsigned long *ckih1, unsigned long *ckih2)
+{
+        struct device_node *np;
+
+        /* retrieve the freqency of fixed clocks from device tree */
+        for_each_compatible_node(np, NULL, "fixed-clock") {
+                u32 rate;
+                if (of_property_read_u32(np, "clock-frequency", &rate))
+                        continue;
+
+                if (of_device_is_compatible(np, "fsl,imx-ckil"))
+                        *ckil = rate;
+                else if (of_device_is_compatible(np, "fsl,imx-osc"))
+                        *osc = rate;
+                else if (of_device_is_compatible(np, "fsl,imx-ckih1"))
+                        *ckih1 = rate;
+                else if (of_device_is_compatible(np, "fsl,imx-ckih2"))
+                        *ckih2 = rate;
+        }
+}
+
+int __init mx53_clocks_init_dt(void)
+{
+        unsigned long ckil, osc, ckih1, ckih2;
+
+        clk_get_freq_dt(&ckil, &osc, &ckih1, &ckih2);
+        return mx53_clocks_init(ckil, osc, ckih1, ckih2);
+}
diff --git a/arch/arm/mach-mx5/imx53-dt.c b/arch/arm/mach-mx5/imx53-dt.c
new file mode 100644
index 000000000000..ccaa0b81b768
--- /dev/null
+++ b/arch/arm/mach-mx5/imx53-dt.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2011 Linaro Ltd.
+ *
+ * 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/io.h>
+#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/mx53.h>
+
+/*
+ * Lookup table for attaching a specific name and platform_data pointer to
+ * devices as they get created by of_platform_populate().  Ideally this table
+ * would not exist, but the current clock implementation depends on some devices
+ * having a specific name.
+ */
+static const struct of_dev_auxdata imx53_auxdata_lookup[] __initconst = {
+        OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART1_BASE_ADDR, "imx21-uart.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART2_BASE_ADDR, "imx21-uart.1", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART3_BASE_ADDR, "imx21-uart.2", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART4_BASE_ADDR, "imx21-uart.3", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART5_BASE_ADDR, "imx21-uart.4", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-fec", MX53_FEC_BASE_ADDR, "imx25-fec.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx53.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx53.1", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx53.2", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx53.3", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-cspi", MX53_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C3_BASE_ADDR, "imx-i2c.2", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-sdma", MX53_SDMA_BASE_ADDR, "imx35-sdma", NULL),
+        OF_DEV_AUXDATA("fsl,imx53-wdt", MX53_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
+        { /* sentinel */ }
+};
+
+static void __init imx53_tzic_add_irq_domain(struct device_node *np,
+                                struct device_node *interrupt_parent)
+{
+        irq_domain_add_simple(np, 0);
+}
+
+static void __init imx53_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 -
+                                   32 * 7; /* imx53 gets 7 gpio ports */
+
+        irq_domain_add_simple(np, gpio_irq_base);
+        gpio_irq_base += 32;
+}
+
+static const struct of_device_id imx53_irq_match[] __initconst = {
+        { .compatible = "fsl,imx53-tzic", .data = imx53_tzic_add_irq_domain, },
+        { .compatible = "fsl,imx53-gpio", .data = imx53_gpio_add_irq_domain, },
+        { /* sentinel */ }
+};
+
+static const struct of_device_id imx53_iomuxc_of_match[] __initconst = {
+        { .compatible = "fsl,imx53-iomuxc-ard", .data = imx53_ard_common_init, },
+        { .compatible = "fsl,imx53-iomuxc-evk", .data = imx53_evk_common_init, },
+        { .compatible = "fsl,imx53-iomuxc-qsb", .data = imx53_qsb_common_init, },
+        { .compatible = "fsl,imx53-iomuxc-smd", .data = imx53_smd_common_init, },
+        { /* sentinel */ }
+};
+
+static void __init imx53_dt_init(void)
+{
+        struct device_node *node;
+        const struct of_device_id *of_id;
+        void (*func)(void);
+
+        of_irq_init(imx53_irq_match);
+
+        node = of_find_matching_node(NULL, imx53_iomuxc_of_match);
+        if (node) {
+                of_id = of_match_node(imx53_iomuxc_of_match, node);
+                func = of_id->data;
+                func();
+                of_node_put(node);
+        }
+
+        of_platform_populate(NULL, of_default_bus_match_table,
+                             imx53_auxdata_lookup, NULL);
+}
+
+static void __init imx53_timer_init(void)
+{
+        mx53_clocks_init_dt();
+}
+
+static struct sys_timer imx53_timer = {
+        .init = imx53_timer_init,
+};
+
+static const char *imx53_dt_board_compat[] __initdata = {
+        "fsl,imx53-ard",
+        "fsl,imx53-evk",
+        "fsl,imx53-qsb",
+        "fsl,imx53-smd",
+        NULL
+};
+
+DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
+        .map_io         = mx53_map_io,
+        .init_early     = imx53_init_early,
+        .init_irq       = mx53_init_irq,
+        .handle_irq     = imx53_handle_irq,
+        .timer          = &imx53_timer,
+        .init_machine   = imx53_dt_init,
+        .dt_compat      = imx53_dt_board_compat,
+MACHINE_END