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mx51evk: Add CONFIG_REVISION_TAG

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FSL 2.6.35 kernel assumes that the bootloader passes the CONFIG_REVISION_TAG
information.

If this data is not present, the kernel misconfigures the TZIC, which results in
the timer interrupt handler never being called, so the kernel deadlocks while
calibrating its delay.

Suggested-by: Greg Topmiller <Greg.Topmiller@jdsu.com>
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Acked-by: Fabio Estevam <fabio.estevam@freescale.com>
This commit is contained in:
Benoît Thébaudeau 2012-09-18 04:48:42 +00:00 committed by Stefano Babic
parent 1d9b033269
commit 362635bd50
3 changed files with 11 additions and 0 deletions
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2
arch/arm/include/asm/arch-mx5/imx-regs.h
View file

@ -321,6 +321,8 @@
#define BOARD_REV_1_0 0x0
#define BOARD_REV_2_0 0x1
#define BOARD_VER_OFFSET 0x8
#define IMX_IIM_BASE (IIM_BASE_ADDR)
#if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__))

8
board/freescale/mx51evk/mx51evk.c
View file

@ -60,6 +60,14 @@ int dram_init(void)
return 0;
}
u32 get_board_rev(void)
{
u32 rev = get_cpu_rev();
if (!gpio_get_value(IMX_GPIO_NR(1, 22)))
rev |= BOARD_REV_2_0 << BOARD_VER_OFFSET;
return rev;
}
static void setup_iomux_uart(void)
{
unsigned int pad = PAD_CTL_HYS_ENABLE | PAD_CTL_PKE_ENABLE |

1
include/configs/mx51evk.h
View file

@ -44,6 +44,7 @@
#define CONFIG_CMDLINE_TAG /* enable passing of ATAGs */
#define CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_INITRD_TAG
#define CONFIG_REVISION_TAG
#define CONFIG_OF_LIBFDT