arch/arm/mach-imx/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/clk.h>
  14 #include <linux/clkdev.h>
  15 #include <linux/err.h>
  16 #include <linux/io.h>
  17 #include <linux/irq.h>
  18 #include <linux/of_irq.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/pinctrl/machine.h>
  21 #include <asm/mach/arch.h>
  22 #include <asm/mach/time.h>
  23 #include <mach/common.h>
  24 #include <mach/mx53.h>
  25
  26 /*
  27  * Lookup table for attaching a specific name and platform_data pointer to
  28  * devices as they get created by of_platform_populate().  Ideally this table
  29  * would not exist, but the current clock implementation depends on some devices
  30  * having a specific name.
  31  */
  32 static const struct of_dev_auxdata imx53_auxdata_lookup[] __initconst = {
  33         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART1_BASE_ADDR, "imx21-uart.0", NULL),
  34         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART2_BASE_ADDR, "imx21-uart.1", NULL),
  35         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART3_BASE_ADDR, "imx21-uart.2", NULL),
  36         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART4_BASE_ADDR, "imx21-uart.3", NULL),
  37         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART5_BASE_ADDR, "imx21-uart.4", NULL),
  38         OF_DEV_AUXDATA("fsl,imx53-fec", MX53_FEC_BASE_ADDR, "imx25-fec.0", NULL),
  39         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx53.0", NULL),
  40         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx53.1", NULL),
  41         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx53.2", NULL),
  42         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx53.3", NULL),
  43         OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
  44         OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
  45         OF_DEV_AUXDATA("fsl,imx53-cspi", MX53_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
  46         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
  47         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
  48         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C3_BASE_ADDR, "imx-i2c.2", NULL),
  49         OF_DEV_AUXDATA("fsl,imx53-sdma", MX53_SDMA_BASE_ADDR, "imx35-sdma", NULL),
  50         OF_DEV_AUXDATA("fsl,imx53-wdt", MX53_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
  51         { /* sentinel */ }
  52 };
  53
  54 static const struct of_device_id imx53_iomuxc_of_match[] __initconst = {
  55         { .compatible = "fsl,imx53-iomuxc-ard", .data = imx53_ard_common_init, },
  56         { .compatible = "fsl,imx53-iomuxc-evk", .data = imx53_evk_common_init, },
  57         { .compatible = "fsl,imx53-iomuxc-qsb", .data = imx53_qsb_common_init, },
  58         { .compatible = "fsl,imx53-iomuxc-smd", .data = imx53_smd_common_init, },
  59         { /* sentinel */ }
  60 };
  61
  62 static void __init imx53_qsb_init(void)
  63 {
  64         struct clk *clk;
  65
  66         clk = clk_get_sys(NULL, "ssi_ext1");
  67         if (IS_ERR(clk)) {
  68                 pr_err("failed to get clk ssi_ext1\n");
  69                 return;
  70         }
  71
  72         clk_register_clkdev(clk, NULL, "0-000a");
  73 }
  74
  75 static void __init imx53_dt_init(void)
  76 {
  77         struct device_node *node;
  78         const struct of_device_id *of_id;
  79         void (*func)(void);
  80
  81         pinctrl_provide_dummies();
  82
  83         node = of_find_matching_node(NULL, imx53_iomuxc_of_match);
  84         if (node) {
  85                 of_id = of_match_node(imx53_iomuxc_of_match, node);
  86                 func = of_id->data;
  87                 func();
  88                 of_node_put(node);
  89         }
  90
  91         if (of_machine_is_compatible("fsl,imx53-qsb"))
  92                 imx53_qsb_init();
  93
  94         of_platform_populate(NULL, of_default_bus_match_table,
  95                              imx53_auxdata_lookup, NULL);
  96 }
  97
  98 static void __init imx53_timer_init(void)
  99 {
 100         mx53_clocks_init_dt();
 101 }
 102
 103 static struct sys_timer imx53_timer = {
 104         .init = imx53_timer_init,
 105 };
 106
 107 static const char *imx53_dt_board_compat[] __initdata = {
 108         "fsl,imx53",
 109         NULL
 110 };
 111
 112 DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
 113         .map_io         = mx53_map_io,
 114         .init_early     = imx53_init_early,
 115         .init_irq       = mx53_init_irq,
 116         .handle_irq     = imx53_handle_irq,
 117         .timer          = &imx53_timer,
 118         .init_machine   = imx53_dt_init,
 119         .init_late      = imx53_init_late,
 120         .dt_compat      = imx53_dt_board_compat,
 121         .restart        = mxc_restart,
 122 MACHINE_END