arch/arm/mach-mx5/imx51-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/irq.h>
  14 #include <linux/irqdomain.h>
  15 #include <linux/of_irq.h>
  16 #include <linux/of_platform.h>
  17 #include <asm/mach/arch.h>
  18 #include <asm/mach/time.h>
  19 #include <mach/common.h>
  20 #include <mach/mx51.h>
  21
  22 /*
  23  * Lookup table for attaching a specific name and platform_data pointer to
  24  * devices as they get created by of_platform_populate().  Ideally this table
  25  * would not exist, but the current clock implementation depends on some devices
  26  * having a specific name.
  27  */
  28 static const struct of_dev_auxdata imx51_auxdata_lookup[] __initconst = {
  29         OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART1_BASE_ADDR, "imx21-uart.0", NULL),
  30         OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART2_BASE_ADDR, "imx21-uart.1", NULL),
  31         OF_DEV_AUXDATA("fsl,imx51-uart", MX51_UART3_BASE_ADDR, "imx21-uart.2", NULL),
  32         OF_DEV_AUXDATA("fsl,imx51-fec", MX51_FEC_BASE_ADDR, "imx27-fec.0", NULL),
  33         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx51.0", NULL),
  34         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx51.1", NULL),
  35         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx51.2", NULL),
  36         OF_DEV_AUXDATA("fsl,imx51-esdhc", MX51_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx51.3", NULL),
  37         OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
  38         OF_DEV_AUXDATA("fsl,imx51-ecspi", MX51_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
  39         OF_DEV_AUXDATA("fsl,imx51-cspi", MX51_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
  40         OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
  41         OF_DEV_AUXDATA("fsl,imx51-i2c", MX51_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
  42         OF_DEV_AUXDATA("fsl,imx51-sdma", MX51_SDMA_BASE_ADDR, "imx35-sdma", NULL),
  43         OF_DEV_AUXDATA("fsl,imx51-wdt", MX51_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
  44         { /* sentinel */ }
  45 };
  46
  47 static void __init imx51_tzic_add_irq_domain(struct device_node *np,
  48                                 struct device_node *interrupt_parent)
  49 {
  50         irq_domain_add_simple(np, 0);
  51 }
  52
  53 static void __init imx51_gpio_add_irq_domain(struct device_node *np,
  54                                 struct device_node *interrupt_parent)
  55 {
  56         static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS -
  57                                    32 * 4; /* imx51 gets 4 gpio ports */
  58
  59         irq_domain_add_simple(np, gpio_irq_base);
  60         gpio_irq_base += 32;
  61 }
  62
  63 static const struct of_device_id imx51_irq_match[] __initconst = {
  64         { .compatible = "fsl,imx51-tzic", .data = imx51_tzic_add_irq_domain, },
  65         { .compatible = "fsl,imx51-gpio", .data = imx51_gpio_add_irq_domain, },
  66         { /* sentinel */ }
  67 };
  68
  69 static const struct of_device_id imx51_iomuxc_of_match[] __initconst = {
  70         { .compatible = "fsl,imx51-iomuxc-babbage", .data = imx51_babbage_common_init, },
  71         { /* sentinel */ }
  72 };
  73
  74 static void __init imx51_dt_init(void)
  75 {
  76         struct device_node *node;
  77         const struct of_device_id *of_id;
  78         void (*func)(void);
  79
  80         of_irq_init(imx51_irq_match);
  81
  82         node = of_find_matching_node(NULL, imx51_iomuxc_of_match);
  83         if (node) {
  84                 of_id = of_match_node(imx51_iomuxc_of_match, node);
  85                 func = of_id->data;
  86                 func();
  87                 of_node_put(node);
  88         }
  89
  90         of_platform_populate(NULL, of_default_bus_match_table,
  91                              imx51_auxdata_lookup, NULL);
  92 }
  93
  94 static void __init imx51_timer_init(void)
  95 {
  96         mx51_clocks_init_dt();
  97 }
  98
  99 static struct sys_timer imx51_timer = {
 100         .init = imx51_timer_init,
 101 };
 102
 103 static const char *imx51_dt_board_compat[] __initdata = {
 104         "fsl,imx51-babbage",
 105         NULL
 106 };
 107
 108 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
 109         .map_io         = mx51_map_io,
 110         .init_early     = imx51_init_early,
 111         .init_irq       = mx51_init_irq,
 112         .handle_irq     = imx51_handle_irq,
 113         .timer          = &imx51_timer,
 114         .init_machine   = imx51_dt_init,
 115         .dt_compat      = imx51_dt_board_compat,
 116 MACHINE_END