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/irqdomain.h>
  19 #include <linux/of_irq.h>
  20 #include <linux/of_platform.h>
  21 #include <linux/pinctrl/machine.h>
  22 #include <asm/mach/arch.h>
  23 #include <asm/mach/time.h>
  24 #include <mach/common.h>
  25 #include <mach/mx53.h>
  26
  27 /*
  28  * Lookup table for attaching a specific name and platform_data pointer to
  29  * devices as they get created by of_platform_populate().  Ideally this table
  30  * would not exist, but the current clock implementation depends on some devices
  31  * having a specific name.
  32  */
  33 static const struct of_dev_auxdata imx53_auxdata_lookup[] __initconst = {
  34         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART1_BASE_ADDR, "imx21-uart.0", NULL),
  35         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART2_BASE_ADDR, "imx21-uart.1", NULL),
  36         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART3_BASE_ADDR, "imx21-uart.2", NULL),
  37         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART4_BASE_ADDR, "imx21-uart.3", NULL),
  38         OF_DEV_AUXDATA("fsl,imx53-uart", MX53_UART5_BASE_ADDR, "imx21-uart.4", NULL),
  39         OF_DEV_AUXDATA("fsl,imx53-fec", MX53_FEC_BASE_ADDR, "imx25-fec.0", NULL),
  40         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC1_BASE_ADDR, "sdhci-esdhc-imx53.0", NULL),
  41         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC2_BASE_ADDR, "sdhci-esdhc-imx53.1", NULL),
  42         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC3_BASE_ADDR, "sdhci-esdhc-imx53.2", NULL),
  43         OF_DEV_AUXDATA("fsl,imx53-esdhc", MX53_ESDHC4_BASE_ADDR, "sdhci-esdhc-imx53.3", NULL),
  44         OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI1_BASE_ADDR, "imx51-ecspi.0", NULL),
  45         OF_DEV_AUXDATA("fsl,imx53-ecspi", MX53_ECSPI2_BASE_ADDR, "imx51-ecspi.1", NULL),
  46         OF_DEV_AUXDATA("fsl,imx53-cspi", MX53_CSPI_BASE_ADDR, "imx35-cspi.0", NULL),
  47         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
  48         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
  49         OF_DEV_AUXDATA("fsl,imx53-i2c", MX53_I2C3_BASE_ADDR, "imx-i2c.2", NULL),
  50         OF_DEV_AUXDATA("fsl,imx53-sdma", MX53_SDMA_BASE_ADDR, "imx35-sdma", NULL),
  51         OF_DEV_AUXDATA("fsl,imx53-wdt", MX53_WDOG1_BASE_ADDR, "imx2-wdt.0", NULL),
  52         { /* sentinel */ }
  53 };
  54
  55 static int __init imx53_tzic_add_irq_domain(struct device_node *np,
  56                                 struct device_node *interrupt_parent)
  57 {
  58         irq_domain_add_legacy(np, 128, 0, 0, &irq_domain_simple_ops, NULL);
  59         return 0;
  60 }
  61
  62 static int __init imx53_gpio_add_irq_domain(struct device_node *np,
  63                                 struct device_node *interrupt_parent)
  64 {
  65         static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
  66
  67         gpio_irq_base -= 32;
  68         irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops, NULL);
  69
  70         return 0;
  71 }
  72
  73 static const struct of_device_id imx53_irq_match[] __initconst = {
  74         { .compatible = "fsl,imx53-tzic", .data = imx53_tzic_add_irq_domain, },
  75         { .compatible = "fsl,imx53-gpio", .data = imx53_gpio_add_irq_domain, },
  76         { /* sentinel */ }
  77 };
  78
  79 static const struct of_device_id imx53_iomuxc_of_match[] __initconst = {
  80         { .compatible = "fsl,imx53-iomuxc-ard", .data = imx53_ard_common_init, },
  81         { .compatible = "fsl,imx53-iomuxc-evk", .data = imx53_evk_common_init, },
  82         { .compatible = "fsl,imx53-iomuxc-qsb", .data = imx53_qsb_common_init, },
  83         { .compatible = "fsl,imx53-iomuxc-smd", .data = imx53_smd_common_init, },
  84         { /* sentinel */ }
  85 };
  86
  87 static void __init imx53_qsb_init(void)
  88 {
  89         struct clk *clk;
  90
  91         clk = clk_get_sys(NULL, "ssi_ext1");
  92         if (IS_ERR(clk)) {
  93                 pr_err("failed to get clk ssi_ext1\n");
  94                 return;
  95         }
  96
  97         clk_register_clkdev(clk, NULL, "0-000a");
  98 }
  99
 100 static void __init imx53_dt_init(void)
 101 {
 102         struct device_node *node;
 103         const struct of_device_id *of_id;
 104         void (*func)(void);
 105
 106         of_irq_init(imx53_irq_match);
 107
 108         pinctrl_provide_dummies();
 109
 110         node = of_find_matching_node(NULL, imx53_iomuxc_of_match);
 111         if (node) {
 112                 of_id = of_match_node(imx53_iomuxc_of_match, node);
 113                 func = of_id->data;
 114                 func();
 115                 of_node_put(node);
 116         }
 117
 118         if (of_machine_is_compatible("fsl,imx53-qsb"))
 119                 imx53_qsb_init();
 120
 121         of_platform_populate(NULL, of_default_bus_match_table,
 122                              imx53_auxdata_lookup, NULL);
 123 }
 124
 125 static void __init imx53_timer_init(void)
 126 {
 127         mx53_clocks_init_dt();
 128 }
 129
 130 static struct sys_timer imx53_timer = {
 131         .init = imx53_timer_init,
 132 };
 133
 134 static const char *imx53_dt_board_compat[] __initdata = {
 135         "fsl,imx53-ard",
 136         "fsl,imx53-evk",
 137         "fsl,imx53-qsb",
 138         "fsl,imx53-smd",
 139         "fsl,imx53",
 140         NULL
 141 };
 142
 143 DT_MACHINE_START(IMX53_DT, "Freescale i.MX53 (Device Tree Support)")
 144         .map_io         = mx53_map_io,
 145         .init_early     = imx53_init_early,
 146         .init_irq       = mx53_init_irq,
 147         .handle_irq     = imx53_handle_irq,
 148         .timer          = &imx53_timer,
 149         .init_machine   = imx53_dt_init,
 150         .dt_compat      = imx53_dt_board_compat,
 151         .restart        = mxc_restart,
 152 MACHINE_END