forked from Minki/linux
5b7897db00
The recent commit "ARM: EXYNOS: add support for EXYNOS5440 SoC" broke support for exynos5250 because of_machine_is_compatible() was used too early in the boot process. It also probably meant that the exynos5440 failed to use the proper iotable. Switch to use of_flat_dt_is_compatible() in both of these cases. The failure I was seeing in exynos5250 because of this was: Division by zero in kernel. [<80015ed4>] (unwind_backtrace+0x0/0xec) from [<8045c7a4>] (dump_stack+0x20/0x24) [<8045c7a4>] (dump_stack+0x20/0x24) from [<80012990>] (__div0+0x20/0x28) [<80012990>] (__div0+0x20/0x28) from [<8021ab04>] (Ldiv0_64+0x8/0x18) [<8021ab04>] (Ldiv0_64+0x8/0x18) from [<80068560>] (__clocksource_updatefreq_scale+0x54/0x134) [<80068560>] (__clocksource_updatefreq_scale+0x54/0x134) from [<8006865c>] (__clocksource_register_scale+0x1c/0x54) [<8006865c>] (__clocksource_register_scale+0x1c/0x54) from [<80612a18>] (exynos_timer_init+0x100/0x1e8) [<80612a18>] (exynos_timer_init+0x100/0x1e8) from [<8060d184>] (time_init+0x28/0x38) [<8060d184>] (time_init+0x28/0x38) from [<8060a754>] (start_kernel+0x1e0/0x3c8) [<8060a754>] (start_kernel+0x1e0/0x3c8) from [<40008078>] (0x40008078) Signed-off-by: Doug Anderson <dianders@chromium.org> Acked-by: Kukjin Kim <kgene.kim@samsung.com> [olofj: fixed two build errors, one missing include and one !CONFIG_OF failure] Signed-off-by: Olof Johansson <olof@lixom.net>
123 lines
4.3 KiB
C
123 lines
4.3 KiB
C
/*
|
|
* SAMSUNG EXYNOS5250 Flattened Device Tree enabled machine
|
|
*
|
|
* Copyright (c) 2012 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/of_platform.h>
|
|
#include <linux/of_fdt.h>
|
|
#include <linux/serial_core.h>
|
|
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/hardware/gic.h>
|
|
#include <mach/map.h>
|
|
|
|
#include <plat/cpu.h>
|
|
#include <plat/regs-serial.h>
|
|
|
|
#include "common.h"
|
|
|
|
/*
|
|
* The following lookup table is used to override device names when devices
|
|
* are registered from device tree. This is temporarily added to enable
|
|
* device tree support addition for the EXYNOS5 architecture.
|
|
*
|
|
* For drivers that require platform data to be provided from the machine
|
|
* file, a platform data pointer can also be supplied along with the
|
|
* devices names. Usually, the platform data elements that cannot be parsed
|
|
* from the device tree by the drivers (example: function pointers) are
|
|
* supplied. But it should be noted that this is a temporary mechanism and
|
|
* at some point, the drivers should be capable of parsing all the platform
|
|
* data from the device tree.
|
|
*/
|
|
static const struct of_dev_auxdata exynos5250_auxdata_lookup[] __initconst = {
|
|
OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART0,
|
|
"exynos4210-uart.0", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART1,
|
|
"exynos4210-uart.1", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART2,
|
|
"exynos4210-uart.2", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5_PA_UART3,
|
|
"exynos4210-uart.3", NULL),
|
|
OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(0),
|
|
"s3c2440-i2c.0", NULL),
|
|
OF_DEV_AUXDATA("samsung,s3c2440-i2c", EXYNOS5_PA_IIC(1),
|
|
"s3c2440-i2c.1", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI0,
|
|
"dw_mmc.0", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI1,
|
|
"dw_mmc.1", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI2,
|
|
"dw_mmc.2", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5250-dw-mshc", EXYNOS5_PA_DWMCI3,
|
|
"dw_mmc.3", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI0,
|
|
"exynos4210-spi.0", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI1,
|
|
"exynos4210-spi.1", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos4210-spi", EXYNOS5_PA_SPI2,
|
|
"exynos4210-spi.2", NULL),
|
|
OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA0, "dma-pl330.0", NULL),
|
|
OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_PDMA1, "dma-pl330.1", NULL),
|
|
OF_DEV_AUXDATA("arm,pl330", EXYNOS5_PA_MDMA1, "dma-pl330.2", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC0,
|
|
"exynos-gsc.0", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC1,
|
|
"exynos-gsc.1", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC2,
|
|
"exynos-gsc.2", NULL),
|
|
OF_DEV_AUXDATA("samsung,exynos5-gsc", EXYNOS5_PA_GSC3,
|
|
"exynos-gsc.3", NULL),
|
|
{},
|
|
};
|
|
|
|
static const struct of_dev_auxdata exynos5440_auxdata_lookup[] __initconst = {
|
|
OF_DEV_AUXDATA("samsung,exynos4210-uart", EXYNOS5440_PA_UART0,
|
|
"exynos4210-uart.0", NULL),
|
|
{},
|
|
};
|
|
|
|
static void __init exynos5_dt_map_io(void)
|
|
{
|
|
unsigned long root = of_get_flat_dt_root();
|
|
|
|
exynos_init_io(NULL, 0);
|
|
|
|
if (of_flat_dt_is_compatible(root, "samsung,exynos5250"))
|
|
s3c24xx_init_clocks(24000000);
|
|
}
|
|
|
|
static void __init exynos5_dt_machine_init(void)
|
|
{
|
|
if (of_machine_is_compatible("samsung,exynos5250"))
|
|
of_platform_populate(NULL, of_default_bus_match_table,
|
|
exynos5250_auxdata_lookup, NULL);
|
|
else if (of_machine_is_compatible("samsung,exynos5440"))
|
|
of_platform_populate(NULL, of_default_bus_match_table,
|
|
exynos5440_auxdata_lookup, NULL);
|
|
}
|
|
|
|
static char const *exynos5_dt_compat[] __initdata = {
|
|
"samsung,exynos5250",
|
|
"samsung,exynos5440",
|
|
NULL
|
|
};
|
|
|
|
DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
|
|
/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
|
|
.init_irq = exynos5_init_irq,
|
|
.smp = smp_ops(exynos_smp_ops),
|
|
.map_io = exynos5_dt_map_io,
|
|
.handle_irq = gic_handle_irq,
|
|
.init_machine = exynos5_dt_machine_init,
|
|
.init_late = exynos_init_late,
|
|
.timer = &exynos4_timer,
|
|
.dt_compat = exynos5_dt_compat,
|
|
.restart = exynos5_restart,
|
|
MACHINE_END
|