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The global timer IRQ (PPI[0], PPI 11 in device tree terms) is a
rising edge interrupt. The ARM Cortex-A5 MPCore TRM in Chapter
10.1.2. Interrupt types and sources says:
"Interrupt is rising-edge sensitive."
The bits seem to be read-only, hence this missconfiguration had
no negative effect. However, with commit 992345a58e0c
("irqchip/gic: WARN if setting the interrupt type for a PPI fails")
warnings such as this get printed:
GIC: PPI11 is secure or misconfigured
With this change the new configuration matches the default
configuration and no warning is printed anymore.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Add missing reg properties to AIPS bus and Cortex-A5's PMU unit.
This change avoids the following warnings:
Warning (unit_address_vs_reg): Node /soc/aips-bus@40000000 has a unit
name, but no reg property
Warning (unit_address_vs_reg): Node /soc/aips-bus@40080000 has a unit
name, but no reg property
Warning (unit_address_vs_reg): Node /soc/aips-bus@40080000/pmu@40089000
has a unit name, but no reg property
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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All Freescale Vybrid SoC include a Cortex-A5 core which supports
ARM's standard PMU (performance monitoring unit). Include the
monitoring unit into the Cortex-A5 base device tree vf500.dtsi.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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GPLv2-only devicetrees make reuse difficult for software components
licensed under a different license.
The consensus is that a GPL/X11 dual-license should allow all necessary
uses, so relicense the vfxxx.dtsi, vf500.dtsi and vf610.dtsi files to
this combination.
CCs were acquired using (updated some email addresses, commented out
bouncing email addresses with --):
git shortlog -sne --no-merges arch/arm/boot/dts/vf???.dtsi
--CC: Chao Fu <B44548@freescale.com>
CC: Cosmin Stoica <cosminstefan.stoica@freescale.com>
CC: Frank Li <Frank.Li@freescale.com>
CC: Fugang Duan <B38611@freescale.com>
--CC: Huang Shijie <b32955@freescale.com>
--CC: Jingchang Lu <jingchang.lu@freescale.com>
--CC: Xiubo Li <Li.Xiubo@freescale.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Acked-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Cory Tusar <cory.tusar@pid1solutions.com>
Acked-by: Sanchayan Maity <maitysanchayan@gmail.com>
Acked-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Acked-by: Yuan Yao <yao.yuan@freescale.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Add the Miscellaneous System Control Module (MSCM) to the base
device tree for Vybrid SoC's. This module contains registers
to get information of the individual and current (accessing)
CPU. In a second block, there is an interrupt router, which
handles the routing of the interrupts between the two CPU cores
on VF6xx variants of the SoC. However, also on single core
variants the interrupt router needs to be configured in order
to receive interrupts on the CPU's interrupt controller. Almost
all peripheral interrupts are routed through the router, hence
the MSCM module is the default interrupt parent for this SoC.
In a earlier commit the interrupt nodes were moved out of the
peripheral nodes and specified in the CPU specific vf500.dtsi
device tree. This allowed to use the base device tree vfxxx.dtsi
also for a Cortex-M4 specific device tree, which uses different
interrupt nodes due to the NVIC interrupt controller. However,
since the interrupt parent for peripherals is the MSCM module
independently which CPU the device tree is used for, we can move
the interrupt nodes into the base device tree vfxxx.dtsi again.
Depending on which CPU this base device tree will be used with,
the correct parent interrupt controller has to be assigned to
the MSCM-IR node (GIC or NVIC). The driver takes care of the
parent interrupt controller specific needs (interrupt-cells).
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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On Vybrid, all peripherals are numbered starting with zero,
including the GPIO and PORT module. However, the labels of the
corresponding device tree nodes start with one, which is confusing.
Fix that by renaming the labels of the gpio nodes in the device
tree.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Add device tree node for the Secure Non-Volatile Storage
(SNVS) on the VF610 platform. The SNVS block also has a
Real Time Counter (RTC).
Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Add the system reset controller (SRC) module and use syscon-reboot
to register a restart handler which restarts the SoC using the
SRC SW_RST bit.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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During restructuring of the device tree files the watchdog was
changed to be disabled by default. However, since the watchdog
instance is dedicated to the Cortex-A5, enable the peripheral
by default in the base device tree vf500.dtsi.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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This adds more generic base device trees for Vybrid SoCs. There
are three series of Vybrid SoC commonly available:
- VF3xx series: single core, Cortex-A5 without external memory
- VF5xx series: single core, Cortex-A5
- VF6xx series: dual core, Cortex-A5/Cortex-M4
The second digit represents the presents of a L2 cache (VFx1x).
The VF3xx series are not suitable for Linux especially since the
internal memory is quite small (1.5MiB).
The VF500 is essentially the base SoC, with only one core and
without L1 cache. The VF610 is a superset of the VF500, hence
vf500.dtsi is then included and enhanced by vf610.dtsi. There is
no board using VF510 or VF600 currently, but, if needed, they can
be added easily.
The Linux kernel can also run on the Cortex-M4 CPU of Vybrid
using !MMU support. This patchset creates a device tree structure
which allows to share peripherals nodes for a VF6xx Cortex-M4
device tree too. The two CPU types have different views of the
system: Foremost they are using different interrupt controllers,
but also the memory map is slightly different. The base device
tree vfxxx.dtsi allows to create SoC and board level device trees
supporting the Cortex-M4 while reusing the shared peripherals
nodes.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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