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  1. 01 10月, 2013 7 次提交
    • J
      ARM: at91: sam9g45: shutdown ddr1 too when rebooting · bd737fea
      由 Jean-Christophe PLAGNIOL-VILLARD 提交于 
      Like we are doing on DDR0 we need to cleanly shutdown DDR1 if it is
used before rebooting.
If DDR1 is not initialized, we check it and avoid dereferencing its address.
Even by adding two more instructions, we are able to complete the procedure
within a single cache line.
Signed-off-by: NJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>
      bd737fea
    • J
      ARM: edma: Fix clearing of unused list for DT DMA resources · 6cdaca48
      由 Joel Fernandes 提交于 
      HWMOD removal for MMC is breaking edma_start as the events are being manually
triggered due to unused channel list not being clear.

The above issue is fixed by reading the "dmas" property from the DT node if it
exists and clearing the bits in the unused channel list if the dma controller
used by any device is EDMA. For this purpose we use the of_* helpers to parse
the arguments in the dmas phandle list.

Also introduced is a minor clean up of a checkpatch error in old code.
Reviewed-by: NSekhar Nori <nsekhar@ti.com>
Reported-by: NBalaji T K <balajitk@ti.com>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Olof Johansson <olof@lixom.net>
Cc: Nishanth Menon <nm@ti.com>
Cc: Pantel Antoniou <panto@antoniou-consulting.com>
Cc: Jason Kridner <jkridner@beagleboard.org>
Cc: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: NJoel Fernandes <joelf@ti.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>
      6cdaca48
    • L
      ARM: vexpress: tc2: fix hotplug/idle/kexec race on cluster power down · 64270d82
      由 Lorenzo Pieralisi 提交于 
      On the TC2 testchip, when all CPUs in a cluster enter standbywfi
and commit a power down request, the power controller will wait
for standbywfil2 coming from L2 cache controller to shut the
cluster down.
By the time all CPUs in a cluster commit a power down request
and enter wfi, the power controller cannot backtrack, or put it
another way, a CPU must not be allowed to complete execution
independently of the power controller, the only way for it to
resume properly must be upon wake-up IRQ pending and subsequent
reset triggered from the power controller.

Current MCPM back-end for TC2 disables the GIC CPU IF only when
power down is committed through the tc2_pm_suspend() method, that
makes sense since a suspended CPU is still online and can receive
interrupts whereas a hotplugged CPU, since it is offline,
migrated all IRQs and shutdown the per-CPU peripherals, hence
their PPIs.

The flaw with this reasoning is the following. If all CPUs in
a clusters are entering a power down state either through CPU
idle or CPU hotplug, when the last man successfully completes
the MCPM power down sequence (and executes wfi), power controller
waits for L2 wfi signal to quiesce the cluster and shut it down.
If, when all CPUs are sitting in wfi, an online CPU hotplugs back
in one of the CPUs in the cluster being shutdown, that CPU
receives an IPI that causes wfi to complete (since tc2_pm_down()
method does not disable the GIC CPU IF in that case - CPU being
hotplugged out, not idle) and the power controller will never see
the stanbywfil2 signal coming from L2 that is required for
shutdown to happen and the system deadlocks.

Further to this issue, kexec hotplugs secondary CPUs out during
kernel reload/restart.
Because kexec may (deliberately) trash the old kernel text, it is
not OK for CPUs to follow the MCPM soft reboot path, since
instructions after the WFI may have been replaced by kexec.

If tc2_pm_down() does not disable the GIC cpu interface, there is a
race between CPU powerdown in the old kernel and the IPI from the
new kernel that triggers secondary boot, particularly if the
powerdown is slow (due to L2 cache cleaning for example).  If the
new kernel wins the race, the affected CPU(s) will not really be
reset and may execute garbage after the WFI.

The only solution to this problem consists in disabling the GIC
CPU IF on a CPU committed to power down regardless of the power
down entry method (CPU hotplug or CPU idle). This way, CPU wake-up
is under power controller control, which prevents unexpected wfi
exit caused by a pending IRQ.

This patch moves the GIC CPU IF disable call in the TC2 MCPM
implementation from the tc2_pm_suspend() method to the
tc2_pm_down() method to fix the mentioned race condition(s).
Reviewed-by: NDave Martin <Dave.Martin@arm.com>
Tested-by: Dave Martin <Dave.Martin@arm.com> (for kexec)
Signed-off-by: NSudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NNicolas Pitre <nico@linaro.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>
      64270d82
    • R
      ARM: dts: sirf: fix interrupt and dma prop of VIP for prima2 and atlas6 · 262bcc1d
      由 Renwei Wu 提交于 
      the current dts is lacking interrupt and dma prop for video input
processor of prima2 and atlas6, this patch fixes it.
Signed-off-by: NRenwei Wu <Renwei.Wu@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>
      262bcc1d
    • B
      ARM: dts: sirf: fix the ranges of peri-iobrg of prima2 · 9e85b9d1
      由 Barry Song 提交于 
      we lost an address range <0x56000000 0x56000000 0x1b00000> for peri-iobg
of prima2.
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>
      9e85b9d1
    • B
      ARM: dts: makefile: build atlas6-evb.dtb for ARCH_ATLAS6 · 3349a4b9
      由 Barry Song 提交于 
      Makefile missed to include atlas6-evb.dtb for ARCH_ATLAS6.
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>
      3349a4b9
    • Q
      ARM: dts: sirf: fix fifosize, clks, dma channels for UART · a1369978
      由 Qipan Li 提交于 
      sirf uart and usp-based uart driver with full dma support has
hit 3.12, here we fix the fifosize, dma channels for some HW
prop.
Signed-off-by: NQipan Li <Qipan.Li@csr.com>
Signed-off-by: NBarry Song <Baohua.Song@csr.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>
      a1369978
  3. 26 9月, 2013 1 次提交
  5. 22 9月, 2013 4 次提交
  7. 20 9月, 2013 1 次提交
  9. 19 9月, 2013 16 次提交
  11. 18 9月, 2013 7 次提交
  13. 17 9月, 2013 4 次提交