1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
/*
* (c) 2012 Juergen Beisert <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* Collection of some SoC specific functions
*/
#include <common.h>
#include <init.h>
#include <restart.h>
#include <mach/imx28-regs.h>
#include <io.h>
#define HW_CLKCTRL_RESET 0x1e0
# define HW_CLKCTRL_RESET_CHIP (1 << 1)
#define HW_CLKCTRL_WDOG_POR_DISABLE (1 << 5)
/* Reset the full i.MX28 SoC via a chipset feature */
static void __noreturn imx28_restart_soc(struct restart_handler *rst)
{
u32 reg;
reg = readl(IMX_CCM_BASE + HW_CLKCTRL_RESET);
writel(reg | HW_CLKCTRL_RESET_CHIP, IMX_CCM_BASE + HW_CLKCTRL_RESET);
hang();
/*NOTREACHED*/
}
static int imx28_init(void)
{
u32 reg;
/*
* The default setting for the WDT is to do a POR. If the SoC is only
* powered via battery, then a WDT reset powers the chip down instead
* of resetting it. Use a software reset only.
*/
reg = readl(IMX_CCM_BASE + HW_CLKCTRL_RESET) |
HW_CLKCTRL_WDOG_POR_DISABLE;
writel(reg, IMX_CCM_BASE + HW_CLKCTRL_RESET);
restart_handler_register_fn(imx28_restart_soc);
return 0;
}
postcore_initcall(imx28_init);
static int imx28_devices_init(void)
{
if (of_get_root_node())
return 0;
add_generic_device("imx28-dma-apbh", 0, NULL, MXS_APBH_BASE, 0x2000, IORESOURCE_MEM, NULL);
add_generic_device("imx28-clkctrl", 0, NULL, IMX_CCM_BASE, 0x100, IORESOURCE_MEM, NULL);
add_generic_device("imx28-gpio", 0, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
add_generic_device("imx28-gpio", 1, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
add_generic_device("imx28-gpio", 2, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
add_generic_device("imx28-gpio", 3, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
add_generic_device("imx28-gpio", 4, NULL, IMX_IOMUXC_BASE, 0x2000, IORESOURCE_MEM, NULL);
add_generic_device("ocotp", 0, NULL, IMX_OCOTP_BASE, 0x2000, IORESOURCE_MEM, NULL);
return 0;
}
postcore_initcall(imx28_devices_init);
|
