This patch adds a driver for external IRQ pins connected
to the INTC block on recent SoCs from Renesas.

The INTC hardware block usually contains a rather wide
range of features ranging from external IRQ pin handling
to legacy interrupt controller support. On older SoCs
the INTC is used as a general purpose interrupt controller
both for external IRQ pins and on-chip devices.

On more recent ARM based SoCs with Cortex-A9 the main
interrupt controller is the GIC, but IRQ trigger setup
still need to happen in the INTC hardware block.

This driver implements the glue code needed to configure
IRQ trigger and also handle mask/unmask and demux of
external IRQ pins hooked up from the INTC to the GIC.

Tested on sh73a0 and r8a7779. The hardware varies quite
a bit with SoC model, for instance register width and
bitfield widths vary wildly. The driver requires one GIC
SPI per external IRQ pin to operate.  Each driver instance
will handle up to 8 external IRQ pins.

The SoCs using this driver are currently mainly used
together with regular platform devices so this driver
allows configuration via platform data to support things
like static interrupt base address. DT support will
be added incrementally in the not so distant future.
Signed-off-by: Magnus Damm <damm@opensource.se>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
[Rename device from to rcarfb to rcar-du]
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
[Manual conflict resolution]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Commit "ARM: shmobile: r8a7779: use gic_iid macro" switched R8A7779 platform
devices to using gic_iid() macro instead of gic_spi() but commit "ARM: mach-
shmobile: r8a7779: add SATA support" added another use of gic_spi(). Convert
the SATA IRQ resource to using gic_iid().
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Add SATA clock for r8a7779 SoC (for both device tree and usual cases).
Register SATA controller as a "late" platform device on r8a7779 SoC.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Allow configuration of the r8a7779 SoC SATA controller using a flattened device
tree.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

76cc1887
(thermal: rcar: add Device Tree support)
supported rcar_thermal DT probing.

rcar thermal driver doesn't support IRQ on r8a7779 chip
since it is using old design IRQ.
R-Car/R-Mobile next generation chips are using new design IRQ,
and rcar thermal driver is supporting these.

This patch adds rcar_thermal DT support for r8a7779 without IRQ.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

move r8a7740_meram_workaround() to r8a7740 area
from r8a7779 area
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

"ARM: shmobile: add gic_iid macro for ICCIAR / interrupt ID"
enabled to use gic_iid macro.
This patch exchange current GIC interrupt setting
from gic_spi() to gic_iid()
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
[ horms+renesas@verge.net.au: Updated git commit id in changelog ]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

r8a7779 is not sh73a0
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

r8a7779 is not r8a7740 chip
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

R-Car H1 datasheet GIC number is indicating
GIC ICCIAR / interrupt ID number, not SPI number,
but current marzen board code is using gic_spi() with
un-understandable calculation.

This patch adds new gic_iid() macro which means
ICCIAR / interrupt ID, and used the number
currently written on datasheet.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
[ horms+renesas@verge.net.au: Split board-marzen.c portion into a separate patch ]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

This adds temporarily the alternative device names to the clock list
that are used when booting via Device Tree setup.
Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Each CPU Hotplug implementation for mach-shmobile
is now self-contained, so this change removes unused
helper code in hotplug.c. The two CPU Hotplug capable
SoCs sh73a0 and r8a7779 remain unchanged.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Update the r8a7779 SMP code and CPU Hotplug in particular
to follow the same style as sh73a0. This means dropping
__maybe_unused for #ifdef CONFIG_HOTPLUG_CPU.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Convert the sh73a0 CPU Hotplug code to use a local
implementation of ->cpu_disable(). With this change
in place the sh73a0 SMP code does no longer depend
on hotplug.c.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Update the SMP code for R8A7779 to make use of the
shared SCU function scu_power_mode() together with
the early setup code in shmobile_secondary_vector_scu.

With this patch in place the secondary CPUs modify the
SCU setting during early boot instead of letting other
CPUs deal with the coherency setting before boot. In
other words, we used to setup coherency before boot
in r8a7779_boot_secondary() but that bit is now instead
handled by the code in shmobile_secondary_vector_scu.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Update the r8a7779 CPU Hotplug code to use SCU PSR
to wait for the target CPU core. Previously the
shared code in hotplug.c was used to let cpu_kill()
wait for cpu_die(). With this change in place the
r8a7779 SMP code does not depend on hotplug.c anymore.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Rework the IOMEM() usage for the SCU base address in the
case of r8a7779. Adjusts the TWD to use R8A7779_SCU_BASE.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Rework the IOMEM() usage for the SCU base address in the
case of sh73a0. Removes recently introduced build warnings:

arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: initialization makes integer from pointer without a cast [enabled by default]
arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: (near initialization for 'twd_local_timer.res[0].start') [enabled by default]
arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: initialization makes integer from pointer without a cast [enabled by default]
/arch/arm/mach-shmobile/smp-sh73a0.c:45:15: warning: (near initialization for 'twd_local_timer.res[0].end') [enabled by default]
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Rework the early SCU setup code in headsmp-scu.S to read
the base address in the same way as we use to fetch the
address of the invalidation function.
Reported-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

The ethernet controller is not part of the r8a7779 SoC.

Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

It is sufficient to initialise i2c as a late device.

Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Do not initialise any early devices when using the minimal DT reference
code. Only the delay needs to be initialised.

Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Do not initialise any early devices when using the minimal DT reference
code. Only the delay needs to be initialised.

Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Remove warning about SMP not working with the
clock initialisation sheme used for reference DT.

This is resolved by not selecting CONFIG_PREEMPT.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

This a board to be brought up with SMP enabled
without a board file present.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

This is not needed as irq_set_wake is
only used for suspend to ram which is not
a requirement for bringing up boards using DT.
Reported-by: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Z and ZG clocks on sh73a0 have pll0 as their parent, not pll1.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Adjust emev2_init_delay() and emev2_add_standard_devices_dt()
to become static. They are not used outside this file anyway.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Update the SMP code for EMEV2 to make use of the
shared SCU function scu_power_mode() together with
the early setup code in shmobile_secondary_vector_scu.

With this patch in place the secondary CPUs modify the
SCU setting during early boot instead of letting other
CPUs deal with the coherency setting before boot. In
other words, we used to setup coherency before boot
in emev2_boot_secondary() but that bit is now instead
handled by the code in shmobile_secondary_vector_scu.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Update the code in headsmp-scu.S to use a global
shmobile_scu_base variable both for convenient SCU
base address storage and for the early SCU setup
code in shmobile_secondary_vector_scu.

With this patch applied r8a7779, sh73a0 and EMEV2
all make use of the global shmobile_scu_base
variable. However only sh73a0 makes use of the SCU
bring up code in shmobile_secondary_vector_scu.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Rename headsmp-sh73a0.S into headsmp-scu.S and
introduce shmobile_secondary_vector_scu().

The goal is to be able to share the function
above between all mach-shmobile SoCs that use
SCU for SMP. So far only sh73a0 use this.

At this time the SCU base address is still hard
coded in headsmp-scu.S to 0xf0000000, but this
will be changed in the future.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Rename the static scu_base variable into shmobile_scu_base.

Later in the series the shmobile_scu_base variable will be
made into a global variable so this is preparation only.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Replace scu_base_addr() with a static shmobile_scu_base
variable and introduce R8A7779_SCU_BASE.

Later in the series the shmobile_scu_base variable will be
made into a global variable so this is preparation only.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Replace scu_base_addr() with a static shmobile_scu_base
variable and introduce SH73A0_SCU_BASE.

Later in the series the shmobile_scu_base variable will be
made into a global variable so this is preparation only.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Allow a minimal setup of the r8a7779 SoC using a flattened device tree.
In particular, configure the i2c and ethernet controllers using a
flattened device tree.

SCI serial controller and TMU clock source, whose drivers do not yet
support configuration using a flattened device tree, are still configured
using C code in order to allow booting of a board with this SoC.

The ethernet controller also requires a regulator which is a board property.
A sample snippet DT for the marzen board is as follows:

/dts-v1/;
/include/ "r8a7779.dtsi"

/ {
	fixedregulator3v3: fixedregulator@0 {
		compatible = "regulator-fixed";
		regulator-name = "fixed-3.3V";
		regulator-min-microvolt = <3300000>;
		regulator-max-microvolt = <3300000>;
		regulator-boot-on;
		regulator-always-on;
	};
};

&lan0 {
	vddvario-supply = <&fixedregulator3v3>;
	vdd33a-supply = <&fixedregulator3v3>;
};
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

This allows the GIC interrupt controller of the  r8a7779 SoC to be
initialised using a flattened device tree blob.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

---

v3
* Fix copy-paste error and use unique reg values for each CPU

v2
As suggested by Mark Rutland
* Add reg and device_type to cpus
* Remove #address-cells from gic

Add clock lookup entries for SDHI and MMCIF device names, for the FDT case.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
[horms+renesas@verge.net.au: resolved trivial conflict in clock-r8a7740.c]
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Reduce the number of lines of code in smp-emev2.c
by getting rid of the emev2_get_core_count() function.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

Reduce the number of lines of code in smp-r8a7779.c
by getting rid of the r8a7779_get_core_count() function.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>