kernel/arch/arm/mach-imx/mach-imx51.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/io.h>
  14 #include <linux/irq.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
  20 #include "common.h"
  21 #include "hardware.h"
  22
  23 static void __init imx51_init_early(void)
  24 {
  25         mxc_set_cpu_type(MXC_CPU_MX51);
  26 }
  27
  28 /*
  29  * The MIPI HSC unit has been removed from the i.MX51 Reference Manual by
  30  * the Freescale marketing division. However this did not remove the
  31  * hardware from the chip which still needs to be configured for proper
  32  * IPU support.
  33  */
  34 #define MX51_MIPI_HSC_BASE 0x83fdc000
  35 static void __init imx51_ipu_mipi_setup(void)
  36 {
  37         void __iomem *hsc_addr;
  38
  39         hsc_addr = ioremap(MX51_MIPI_HSC_BASE, SZ_16K);
  40         WARN_ON(!hsc_addr);
  41
  42         /* setup MIPI module to legacy mode */
  43         __raw_writel(0xf00, hsc_addr);
  44
  45         /* CSI mode: reserved; DI control mode: legacy (from Freescale BSP) */
  46         __raw_writel(__raw_readl(hsc_addr + 0x800) | 0x30ff,
  47                 hsc_addr + 0x800);
  48
  49         iounmap(hsc_addr);
  50 }
  51
  52 static void __init imx51_dt_init(void)
  53 {
  54         struct platform_device_info devinfo = { .name = "cpufreq-dt", };
  55
  56         imx51_ipu_mipi_setup();
  57         imx_src_init();
  58
  59         of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
  60         platform_device_register_full(&devinfo);
  61 }
  62
  63 static void __init imx51_init_late(void)
  64 {
  65         mx51_neon_fixup();
  66         imx51_pm_init();
  67 }
  68
  69 static const char * const imx51_dt_board_compat[] __initconst = {
  70         "fsl,imx51",
  71         NULL
  72 };
  73
  74 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
  75         .init_early     = imx51_init_early,
  76         .init_irq       = tzic_init_irq,
  77         .init_machine   = imx51_dt_init,
  78         .init_late      = imx51_init_late,
  79         .dt_compat      = imx51_dt_board_compat,
  80 MACHINE_END