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  1. 04 5月, 2015 4 次提交
  3. 19 4月, 2015 1 次提交
  5. 15 4月, 2015 1 次提交
  7. 10 3月, 2015 1 次提交
  9. 21 2月, 2015 2 次提交
    • S
      sunxi: Machine id hack to prevent loading buggy sunxi-3.4 kernels · 77ef1369
      由 Siarhei Siamashka 提交于 
      Right now U-Boot supports the CONFIG_OLD_SUNXI_KERNEL_COMPAT option,
which makes it go out of its way in limiting the selection of PLL clock
frequencies and PMIC voltages in order not to upset outdated buggy
sunxi-3.4 kernel releases. And if the CONFIG_OLD_SUNXI_KERNEL_COMPAT
option is not set, then booting such old kernels exhibits various
failures at runtime. This is very user unfriendly, and there were
already several incidents when people wasted their time being hit
by these runtime failures and trying to debug them.

The right solution is not to add hacks and workarounds to the mainline
U-Boot, but to fix these bugs in the sunxi-3.4 kernel. And in fact,
the updated sunxi-3.4 kernels already exist. Still we need to follow
the 'Principle of Least Surprise' and U-Boot needs to ensure that
the old buggy kernels are not getting happily booted when the
CONFIG_OLD_SUNXI_KERNEL_COMPAT option is not set. And this patch
addresses this particular issue.

This patch makes U-Boot store the 'compatibility revision' number in
the top 4 bits of the machine id and pass it to the kernel. The old
buggy kernels will fail to load with a very much googlable error
message on the serial console (the "r1 = 0x100010bb" part of it):

  "Error: unrecognized/unsupported machine ID (r1 = 0x100010bb)"

This error message can be documented in the linux-sunxi wiki with
proper explanations about how to resolve this situation and where
to get the necessary bugfixes for the sunxi-3.4 kernel.

The fixed sunxi-3.4 kernels implement a revision compatibility check
and clear the top 4 bits of the machine id if everything is alright.
By accepting the machine id with the bits 31:28 set to 1, the sunxi-3.4
kernel effectively certifies that it has the PLL5 clock speed and
AXP209 DCDC3 voltage fixes applied.

It is still possible to set the CONFIG_OLD_SUNXI_KERNEL_COMPAT option
in U-Boot if the user desires to use an outdated unpatched sunxi-3.4
kernel.
Signed-off-by: NSiarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: NIan Campbell <ijc@hellion.org.uk>
Acked-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
      77ef1369
    • H
      sunxi: Set the /chosen/stdout-path fdt property for sunxi boards · f3133962
      由 Hans de Goede 提交于 
      While discussing with some people how to get the Linux kernel to do the
right thing wrt sending output to both the serial console and the
hdmi out / lcd screen when booting on ARM devices, Grant Likely pointed out
that there already is a solution for this.

All we need to do is set the /chosen/stdout-path fdt property, and if no
console= arguments were specified on the kernel commandline the kernel
will honor this and add this device as a console (next to the primary
video output on hdmi).

And u-boot already has support for setting this, all we need to do is
define OF_STDOUT_PATH and then everything will just work ootb, without
people needing to meddle with adding console= arguments in extlinux.conf .
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Acked-by: NIan Campbell <ijc@hellion.org.uk>
Reviewed-by: NTom Rini <trini@ti.com>
      f3133962
  11. 20 2月, 2015 1 次提交
  13. 17 2月, 2015 3 次提交
  15. 13 2月, 2015 3 次提交
  17. 12 2月, 2015 1 次提交
  19. 02 2月, 2015 1 次提交
  21. 23 1月, 2015 1 次提交
  23. 22 1月, 2015 1 次提交
  25. 21 1月, 2015 1 次提交
    • H
      sunxi: Restore lowlevel_init usage · b56f6e2b
      由 Hans de Goede 提交于 
      2 recent sunxi changes have removed the usage of lowlevel_init by moving some
code around and then setting CONFIG_SKIP_LOWLEVEL_INIT.
This is problematic for 2 reasons:

1) It does not just stop s_init from being called, it also stops
cpu_init_cp15 from getting called, which is undesirable.

2) We want u-boot.bin to be usable standalone, without SPL, some people e.g.
use an upstream u-boot.bin together with Allwinner's boot0 loader. So
u-boot.bin must (re)initialize the gpios, timer, etc.

This commit restores the lowlevel_init / s_init usage, while keeping the
changes to no longer use the global-data (gd) struct in the SPL.
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
      b56f6e2b
  27. 17 1月, 2015 1 次提交
  29. 14 1月, 2015 6 次提交
  31. 25 11月, 2014 3 次提交
  33. 05 11月, 2014 3 次提交
  35. 24 10月, 2014 6 次提交