arch/arm/mach-mx5/imx53-dt.c

   1 /*
   2  * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   3  * Copyright 2011 Linaro Ltd.
   4  *
   5  * The code contained herein is licensed under the GNU General Public
   6  * License. You may obtain a copy of the GNU General Public License
   7  * Version 2 or later at the following locations:
   8  *
   9  * http://www.opensource.org/licenses/gpl-license.html
  10  * http://www.gnu.org/copyleft/gpl.html
  11  */
  12
  13 #include <linux/io.h>
  14 #include <linux/irq.h>
  15 #include <linux/irqdomain.h>
  16 #include <linux/of_irq.h>
  17 #include <linux/of_platform.h>
  18 #include <asm/mach/arch.h>
  19 #include <asm/mach/time.h>
  20 #include <mach/common.h>
  21 #include <mach/mx53.h>
  22
  23 /*
  24  * Lookup table for attaching a specific name and platform_data pointer to
  25  * devices as they get created by of_platform_populate().  Ideally this table
  26  * would not exist, but the current clock implementation depends on some devices
  27  * having a specific name.
  28  */
  29 static const struct of_dev_auxdata imx53_auxdata_lookup[] __initconst = {
  30         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART1_BASE_ADDR, "imx21-uart.0", NULL),
  31         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART2_BASE_ADDR, "imx21-uart.1", NULL),
  32         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART3_BASE_ADDR, "imx21-uart.2", NULL),
  33         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART4_BASE_ADDR, "imx21-uart.3", NULL),
  34         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART5_BASE_ADDR, "imx21-uart.4", NULL),
  35         OF_DEV_AUXDATA("fsl,imx53-fec", MX53_FEC_BASE_ADDR, "imx25-fec.0", NULL),
  36         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx53.0", NULL),
  37         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx53.1", NULL),
  38         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx53.2", NULL),
  39         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx53.3", NULL),
  40         OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
  41         OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
  42         OF_DEV_AUXDATA("fsl,imx53-cspi", MX53_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
  43         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
  44         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
  45         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C3_BASE_ADDR, "imx-i2c.2", NULL),
  46         OF_DEV_AUXDATA("fsl,imx53-sdma", MX53_SDMA_BASE_ADDR, "imx35-sdma", NULL),
  47         OF_DEV_AUXDATA("fsl,imx53-wdt", MX53_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
  48         { /* sentinel */ }
  49 };
  50
  51 static void __init imx53_tzic_add_irq_domain(struct device_node *np,
  52                                 struct device_node *interrupt_parent)
  53 {
  54         irq_domain_add_simple(np, 0);
  55 }
  56
  57 static void __init imx53_gpio_add_irq_domain(struct device_node *np,
  58                                 struct device_node *interrupt_parent)
  59 {
  60         static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS -
  61                                    32 * 7; /* imx53 gets 7 gpio ports */
  62
  63         irq_domain_add_simple(np, gpio_irq_base);
  64         gpio_irq_base += 32;
  65 }
  66
  67 static const struct of_device_id imx53_irq_match[] __initconst = {
  68         { .compatible = "fsl,imx53-tzic", .data = imx53_tzic_add_irq_domain, },
  69         { .compatible = "fsl,imx53-gpio", .data = imx53_gpio_add_irq_domain, },
  70         { /* sentinel */ }
  71 };
  72
  73 static const struct of_device_id imx53_iomuxc_of_match[] __initconst = {
  74         { .compatible = "fsl,imx53-iomuxc-ard", .data = imx53_ard_common_init, },
  75         { .compatible = "fsl,imx53-iomuxc-evk", .data = imx53_evk_common_init, },
  76         { .compatible = "fsl,imx53-iomuxc-qsb", .data = imx53_qsb_common_init, },
  77         { .compatible = "fsl,imx53-iomuxc-smd", .data = imx53_smd_common_init, },
  78         { /* sentinel */ }
  79 };
  80
  81 static void __init imx53_dt_init(void)
  82 {
  83         struct device_node *node;
  84         const struct of_device_id *of_id;
  85         void (*func)(void);
  86
  87         of_irq_init(imx53_irq_match);
  88
  89         node = of_find_matching_node(NULL, imx53_iomuxc_of_match);
  90         if (node) {
  91                 of_id = of_match_node(imx53_iomuxc_of_match, node);
  92                 func = of_id->data;
  93                 func();
  94                 of_node_put(node);
  95         }
  96
  97         of_platform_populate(NULL, of_default_bus_match_table,
  98                              imx53_auxdata_lookup, NULL);
  99 }
 100
 101 static void __init imx53_timer_init(void)
 102 {
 103         mx53_clocks_init_dt();
 104 }
 105
 106 static struct sys_timer imx53_timer = {
 107         .init = imx53_timer_init,
 108 };
 109
 110 static const char *imx53_dt_board_compat[] __initdata = {
 111         "fsl,imx53-ard",
 112         "fsl,imx53-evk",
 113         "fsl,imx53-qsb",
 114         "fsl,imx53-smd",
 115         NULL
 116 };
 117
 118 DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
 119         .map_io         = mx53_map_io,
 120         .init_early     = imx53_init_early,
 121         .init_irq       = mx53_init_irq,
 122         .handle_irq     = imx53_handle_irq,
 123         .timer          = &imx53_timer,
 124         .init_machine   = imx53_dt_init,
 125         .dt_compat      = imx53_dt_board_compat,
 126 MACHINE_END