arch/arm/mach-imx/imx27-dt.c

   1 /*
   2  * Copyright 2012 Sascha Hauer, Pengutronix
   3  *
   4  * The code contained herein is licensed under the GNU General Public
   5  * License. You may obtain a copy of the GNU General Public License
   6  * Version 2 or later at the following locations:
   7  *
   8  * http://www.opensource.org/licenses/gpl-license.html
   9  * http://www.gnu.org/copyleft/gpl.html
  10  */
  11
  12 #include <linux/irq.h>
  13 #include <linux/irqdomain.h>
  14 #include <linux/of_irq.h>
  15 #include <linux/of_platform.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/time.h>
  18 #include <mach/common.h>
  19 #include <mach/mx27.h>
  20
  21 static const struct of_dev_auxdata imx27_auxdata_lookup[] __initconst = {
  22         OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART1_BASE_ADDR, "imx21-uart.0", NULL),
  23         OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART2_BASE_ADDR, "imx21-uart.1", NULL),
  24         OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART3_BASE_ADDR, "imx21-uart.2", NULL),
  25         OF_DEV_AUXDATA("fsl,imx27-fec", MX27_FEC_BASE_ADDR, "imx27-fec.0", NULL),
  26         OF_DEV_AUXDATA("fsl,imx27-i2c", MX27_I2C1_BASE_ADDR, "imx-i2c.0", NULL),
  27         OF_DEV_AUXDATA("fsl,imx27-i2c", MX27_I2C2_BASE_ADDR, "imx-i2c.1", NULL),
  28         OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI1_BASE_ADDR, "imx27-cspi.0", NULL),
  29         OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI2_BASE_ADDR, "imx27-cspi.1", NULL),
  30         OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI3_BASE_ADDR, "imx27-cspi.2", NULL),
  31         OF_DEV_AUXDATA("fsl,imx27-wdt", MX27_WDOG_BASE_ADDR, "imx2-wdt.0", NULL),
  32         OF_DEV_AUXDATA("fsl,imx27-nand", MX27_NFC_BASE_ADDR, "mxc_nand.0", NULL),
  33         { /* sentinel */ }
  34 };
  35
  36 static int __init imx27_avic_add_irq_domain(struct device_node *np,
  37                                 struct device_node *interrupt_parent)
  38 {
  39         irq_domain_add_legacy(np, 64, 0, 0, &irq_domain_simple_ops, NULL);
  40         return 0;
  41 }
  42
  43 static int __init imx27_gpio_add_irq_domain(struct device_node *np,
  44                                 struct device_node *interrupt_parent)
  45 {
  46         static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;
  47
  48         gpio_irq_base -= 32;
  49         irq_domain_add_legacy(np, 32, gpio_irq_base, 0, &irq_domain_simple_ops,
  50                                 NULL);
  51
  52         return 0;
  53 }
  54
  55 static const struct of_device_id imx27_irq_match[] __initconst = {
  56         { .compatible = "fsl,imx27-avic", .data = imx27_avic_add_irq_domain, },
  57         { .compatible = "fsl,imx27-gpio", .data = imx27_gpio_add_irq_domain, },
  58         { /* sentinel */ }
  59 };
  60
  61 static void __init imx27_dt_init(void)
  62 {
  63         of_irq_init(imx27_irq_match);
  64
  65         of_platform_populate(NULL, of_default_bus_match_table,
  66                              imx27_auxdata_lookup, NULL);
  67 }
  68
  69 static void __init imx27_timer_init(void)
  70 {
  71         mx27_clocks_init_dt();
  72 }
  73
  74 static struct sys_timer imx27_timer = {
  75         .init = imx27_timer_init,
  76 };
  77
  78 static const char * const imx27_dt_board_compat[] __initconst = {
  79         "fsl,imx27",
  80         NULL
  81 };
  82
  83 DT_MACHINE_START(IMX27_DT, "Freescale i.MX27 (Device Tree Support)")
  84         .map_io         = mx27_map_io,
  85         .init_early     = imx27_init_early,
  86         .init_irq       = mx27_init_irq,
  87         .handle_irq     = imx27_handle_irq,
  88         .timer          = &imx27_timer,
  89         .init_machine   = imx27_dt_init,
  90         .dt_compat      = imx27_dt_board_compat,
  91         .restart        = mxc_restart,
  92 MACHINE_END