arch/arm/mach-imx/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/of_irq.h>
  15 #include <linux/of_platform.h>
  16 #include <linux/pinctrl/machine.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 const struct of_device_id imx51_iomuxc_of_match[] __initconst = {
  48         { .compatible = "fsl,imx51-iomuxc-babbage", .data = imx51_babbage_common_init, },
  49         { /* sentinel */ }
  50 };
  51
  52 static void __init imx51_dt_init(void)
  53 {
  54         struct device_node *node;
  55         const struct of_device_id *of_id;
  56         void (*func)(void);
  57
  58         pinctrl_provide_dummies();
  59
  60         node = of_find_matching_node(NULL, imx51_iomuxc_of_match);
  61         if (node) {
  62                 of_id = of_match_node(imx51_iomuxc_of_match, node);
  63                 func = of_id->data;
  64                 func();
  65                 of_node_put(node);
  66         }
  67
  68         of_platform_populate(NULL, of_default_bus_match_table,
  69                              imx51_auxdata_lookup, NULL);
  70 }
  71
  72 static void __init imx51_timer_init(void)
  73 {
  74         mx51_clocks_init_dt();
  75 }
  76
  77 static struct sys_timer imx51_timer = {
  78         .init = imx51_timer_init,
  79 };
  80
  81 static const char *imx51_dt_board_compat[] __initdata = {
  82         "fsl,imx51-babbage",
  83         "fsl,imx51",
  84         NULL
  85 };
  86
  87 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
  88         .map_io         = mx51_map_io,
  89         .init_early     = imx51_init_early,
  90         .init_irq       = mx51_init_irq,
  91         .handle_irq     = imx51_handle_irq,
  92         .timer          = &imx51_timer,
  93         .init_machine   = imx51_dt_init,
  94         .init_late      = imx51_init_late,
  95         .dt_compat      = imx51_dt_board_compat,
  96         .restart        = mxc_restart,
  97 MACHINE_END