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ARM: MXS: imx28evk: Add lowlevel support 

This switches the imx28evk to multiimage support and adds the
lowlevel initialization to make the bootlets unnecessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2015-01-20 14:52:39 +01:00
parent 49827f736a
commit 93ba78ece1
3 changed files with 67 additions and 2 deletions
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58
arch/arm/boards/freescale-mx28-evk/lowlevel.c
View File

@ -1,11 +1,65 @@
#define pr_fmt(fmt) "Freescale MX28evk: " fmt
#define DEBUG
#include <common.h>
#include <linux/sizes.h>
#include <asm/barebox-arm-head.h>
#include <asm/barebox-arm.h>
#include <mach/imx28-regs.h>
#include <mach/init.h>
#include <io.h>
#include <debug_ll.h>
#include <mach/iomux.h>
#include <stmp-device.h>
void __naked barebox_arm_reset_vector(void)
ENTRY_FUNCTION(start_barebox_freescale_mx28evk, r0, r1, r2)
{
arm_cpu_lowlevel_init();
barebox_arm_entry(IMX_MEMORY_BASE, SZ_128M, NULL);
}
static const uint32_t iomux_pads[] = {
/* EMI */
EMI_DATA0, EMI_DATA1, EMI_DATA2, EMI_DATA3, EMI_DATA4, EMI_DATA5,
EMI_DATA6, EMI_DATA7, EMI_DATA8, EMI_DATA9, EMI_DATA10, EMI_DATA11,
EMI_DATA12, EMI_DATA13, EMI_DATA14, EMI_DATA15, EMI_ODT0, EMI_DQM0,
EMI_ODT1, EMI_DQM1, EMI_DDR_OPEN_FB, EMI_CLK, EMI_DSQ0, EMI_DSQ1,
EMI_DDR_OPEN, EMI_A0, EMI_A1, EMI_A2, EMI_A3, EMI_A4, EMI_A5,
EMI_A6, EMI_A7, EMI_A8, EMI_A9, EMI_A10, EMI_A11, EMI_A12, EMI_A13,
EMI_A14, EMI_BA0, EMI_BA1, EMI_BA2, EMI_CASN, EMI_RASN, EMI_WEN,
EMI_CE0N, EMI_CE1N, EMI_CKE,
/* Debug UART */
PWM0_DUART_RX | VE_3_3V,
PWM1_DUART_TX | VE_3_3V,
};
static noinline void freescale_mx28evk_init(void)
{
int i;
/* initialize muxing */
for (i = 0; i < ARRAY_SIZE(iomux_pads); i++)
imx_gpio_mode(iomux_pads[i]);
pr_debug("initializing power...\n");
mx28_power_init_battery_input();
pr_debug("initializing SDRAM...\n");
mx28_mem_init();
pr_debug("DONE\n");
}
ENTRY_FUNCTION(prep_start_barebox_freescale_mx28evk, r0, r1, r2)
{
void (*back)(unsigned long) = (void *)get_lr();
relocate_to_current_adr();
setup_c();
freescale_mx28evk_init();
back(0);
}

1
arch/arm/mach-mxs/Kconfig
View File

@ -69,6 +69,7 @@ config MACH_TX28
config MACH_MX28EVK
bool "mx28-evk"
select MXS_OCOTP
select HAVE_PBL_MULTI_IMAGES
help
Say Y here if you are using the Freescale i.MX28-EVK board

10
images/Makefile.mxs
View File

@ -32,6 +32,16 @@ image-$(CONFIG_MACH_TX28) += barebox-karo-tx28-sd.img
FILE_barebox-karo-tx28-2nd.img = start_barebox_karo_tx28.pblx
image-$(CONFIG_MACH_TX28) += barebox-karo-tx28-2nd.img
pblx-$(CONFIG_MACH_MX28EVK) += start_barebox_freescale_mx28evk prep_start_barebox_freescale_mx28evk
PREP_start_barebox_freescale_mx28evk.pblx.mxsbs = start_barebox_freescale_mx28evk_prep
CFG_start_barebox_freescale_mx28evk.mxsbs = $(mxs28cfg)
FILE_barebox-freescale-mx28evk-bootstream.img = start_barebox_freescale_mx28evk.mxsbs
image-$(CONFIG_MACH_MX28EVK) += barebox-freescale-mx28evk-bootstream.img
FILE_barebox-freescale-mx28evk-sd.img = start_barebox_freescale_mx28evk.mxsbs.mxssd
image-$(CONFIG_MACH_MX28EVK) += barebox-freescale-mx28evk-sd.img
FILE_barebox-freescale-mx28evk-2nd.img = start_barebox_freescale_mx28evk.pblx
image-$(CONFIG_MACH_MX28EVK) += barebox-freescale-mx28evk-2nd.img
pblx-$(CONFIG_MACH_IMX233_OLINUXINO) += start_barebox_olinuxino_imx23 prep_start_barebox_olinuxino_imx23
PREP_start_barebox_olinuxino_imx23.pblx.mxsbs = start_barebox_olinuxino_imx23_prep;
CFG_start_barebox_olinuxino_imx23.mxsbs = $(mxs23cfg)