On Wed, Sep 1, 2010 at 3:56 PM, Amit Kucheria <amit.kuche...@linaro.org> wrote:
>> I would be ok if we would only support TO3 and the kernel wouldn't boot
>> on TO2 hardware, but AIUI the kernel will boot just fine and turn on
>> NEON on TO2 such as Babbage 2.x, so I'm a bit scared by just release
>> noting it.
>
> Another solution is that we could perhaps add code in the board init function
> to check the cpu revision and if NEON was enabled, then stop booting.
This is what the patch would look like (not-even compile tested)
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index ed885f9..e54b4a1 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -225,6 +225,10 @@ static void __init mxc_board_init(void)
{
struct pad_desc usbh1stp = MX51_PAD_USBH1_STP__USBH1_STP;
+ if ((mx51_revision() < MX51_CHIP_REV_3_0)
+ && (elf_hwcap & HWCAP_NEON))
+ panic("Kernel does not support TO1/TO2 i.MX5 chips\n");
+
mxc_iomux_v3_setup_multiple_pads(mx51babbage_pads,
ARRAY_SIZE(mx51babbage_pads));
mxc_init_imx_uart();
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