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// SPDX-License-Identifier: GPL-2.0-or-later
// SPDX-FileCopyrightText: 2012 Juergen Beisert <kernel@pengutronix.de>
/* Collection of some SoC specific functions */
#include <common.h>
#include <init.h>
#include <restart.h>
#include <mach/mxs/imx28-regs.h>
#include <io.h>
#include <asm/memory.h>
#include <mach/mxs/imx28.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("soc", imx28_restart_soc);
arm_add_mem_device("ram0", IMX_MEMORY_BASE, imx28_get_memsize());
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);
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