Contrary to other RPi devices, RPi3 uses uart0 to communicate with
the BCM43438 bluetooth controller. uart1 is then used for the console.
Today, the console configuration is inherited from the bcm283x dtsi
(bootargs) which is not the correct one for the RPi3. This leads to
routing issue and confuses the Bluetooth controller with unexpected
data.

This patch introduces chosen/stdout path to configure console to uart0
on bcm283x family and overwrite it to uart1 in the RPi3 dts.

Create serial0/1 aliases referring to uart0 and uart1 paths.
Remove unneeded earlyprintk.

Fixes: 4188ea2a ("ARM: bcm283x: Define UART pinmuxing on board level")
Signed-off-by: NLoic Poulain <loic.poulain@gmail.com>
Tested-by: NStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Reviewed-by: NEric Anholt <eric@anholt.net>

In order to use dwc2 in OTG or gadget mode the USB PHY should be
specified. Since there is no bcm283x USB PHY driver use the generic
one.
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Acked-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NEric Anholt <eric@anholt.net>

As suggested by Eduardo Valentin this adds the thermal zone for
the bcm2835 SoC with its single thermal sensor. We start with
the criticial trip point and leave the cooling devices empty
since we don't have any at the moment. Since the coefficients
could vary depending on the SoC we need to define them separate.
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NEduardo Valentin <edubezval@gmail.com>

The Raspberry Pi startup stub files for multi-core BCM283X processors
make the secondary CPUs spin until the corresponding mailbox is
written. These stubs are loaded at physical address 0x00000xxx (as seen
by the ARMs), but this page will be reused by the kernel unless it is
explicitly reserved, causing the waiting cores to execute random code.

Use the /memreserve/ Device Tree directive to mark the first page as
off-limits to the kernel.

See: https://github.com/raspberrypi/linux/issues/1989Signed-off-by: NPhil Elwell <phil@raspberrypi.org>
Signed-off-by: NEric Anholt <eric@anholt.net>
Reviewed-by: NEric Anholt <eric@anholt.net>

According to the BCM2835 ARM Peripherals document uart1 doesn't map to pins
36-39, but uart0 does.

Also, split into separate Rx/Tx and CST/RTS groups to match other uart nodes.

Fixes: 21ff8439 ("ARM: dts: bcm283x: Define standard pinctrl groups in the gpio node.")
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Reviewed-by: NEric Anholt <eric@anholt.net>

According to the BCM2835 ARM Peripherals document i2c0 doesn't map to pins 32,
34 but to 28, 29.

Fixes: 21ff8439 ("ARM: dts: bcm283x: Define standard pinctrl groups in the gpio node.")
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Reviewed-by: NEric Anholt <eric@anholt.net>

Downstream kernel uses pins 32, 33 as UART0 (PL011) Rx/Tx to communicate with
the Bluetooth chip. So ALT3 of these pins is most likely not CTS/RTS. Change
the node name to reflect that. This matches section 6.2 "Alternative Function
Assignments" in the BCM2835 ARM Peripherals document.

With this change in place, adding

  &uart0 {
	 pinctrl-names = "default";
	 pinctrl-0 = <&uart0_gpio32 &gpclk2_gpio43>;
	 status = "okay";
  };

to bcm2837-rpi-3-b.dts does the right thing on my Raspberry Pi 3.

Pins 30, 31 are CTS/RTS of UART0 in alternate function 3. Rename uart0_gpio30
as well.

While at it, fix a little typo in a nearby comment.

Fixes: 21ff8439 ("ARM: dts: bcm283x: Define standard pinctrl groups in the gpio node.")
Acked-by: NStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Reviewed-by: NEric Anholt <eric@anholt.net>

Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Acked-by: NEric Anholt <eric@anholt.net>
Acked-by: NStefan Wahren <stefan.wahren@i2se.com>

Add the dmas and dma-names properties to support HDMI audio.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NEric Anholt <eric@anholt.net>

The modules stay disabled by default, and if you want to enable DSI
you'll need an overlay that connects a panel to it.
Signed-off-by: NEric Anholt <eric@anholt.net>

Add the VEC (Video EnCoder) node definition in bcm283x.dtsi.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NEric Anholt <eric@anholt.net>

Add the node for the thermal sensor of the bcm2835-soc
to the device tree.
Signed-off-by: NMartin Sperl <kernel@martin.sperl.org>
Reviewed-by: NEric Anholt <eric@anholt.net>
Acked-by: NStefan Wahren <stefan.wahren@i2se.com>

Changelog:
V1 -> V5: generic settings is shared in bcm283x.dtsi, but disabled
	  moved the compatible string to the SOC specific dtsi
            for arm and arm64
V5 -> V6: fix remove 0x prefix from thermal@0x7e212000

Note: there is no arm/boot/dts/bcm2837.dtsi as of now,
      so the 32-bit rpi3 dt is not modified.
Signed-off-by: NEric Anholt <eric@anholt.net>

The address of the mailbox node in the bcm283x.dtsi also has a typo.
So fix it accordingly.
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: NAndreas Färber <afaerber@suse.de>
Fixes: 05b682b7 ("ARM: bcm2835: dt: Add the mailbox to the device tree")
Signed-off-by: NEric Anholt <eric@anholt.net>

The BCM2835-ARM-Peripherals.pdf documentation specifies what the
function selects do for the pins, and there are a bunch of obvious
groupings to be made.  With these created, we'll be able to replace
bcm2835-rpi.dtsi's main "set all of these pins to alt0" with
references to specific groups we want enabled.

Also add pinctrl groups for emmc and sdhost.

Based on patches by Eric Anholt, with fixups by Gerd Hoffmann.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NStefan Wahren <stefan.wahren@i2se.com>

This file is included from DTS files under arch/arm64 too (via
broadcom/bcm2837-rpi-3-b.dts and broadcom/bcm2837.dtsi). There is a desire
not to have skeleton.dtsi for ARM64. See commit 3ebee5a2 ("arm64: dts:
kill skeleton.dtsi") for rationale for its removal.

As well as the addition of #*-cells also requires adding the device_type to
the rpi memory node explicitly.

Note that this change results in the removal of an empty /aliases node from
bcm2835-rpi-a.dtb and bcm2835-rpi-a-plus.dtb. I have no hardware to check
if this is a problem or not.

It also results in some reordering of the nodes in the DTBs (the /aliases
and /memory nodes come later). This isn't supposed to matter but, again,
I've no hardware to check if it is true in this particular case.
Signed-off-by: NIan Campbell <ijc@hellion.org.uk>
Acked-by: NMark Rutland <mark.rutland@arm.com>
Tested-by: NStefan Wahren <stefan.wahren@i2se.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Eric Anholt <eric@anholt.net>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Lee Jones <lee@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-rpi-kernel@lists.infradead.org
Cc: arm@kernel.org
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

According to the DWC2 binding an appropriate clock is required.
This clock isn't handled by bcm2835 clock driver, so add a fixed
clock to the bcm283x DT.
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Acked-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NEric Anholt <eric@anholt.net>

The hub and the ethernet in its port 1 are hardwired on the board.

Compared to the adapters that can be plugged into the USB ports, this
one has no serial EEPROM to store its MAC. Nevertheless, the Raspberry Pi
has the MAC address for this adapter in its ROM, accessible from its
firmware.

U-Boot can read out the address and set the local-mac-address property of the
node with "ethernet" alias. Let's add the node so that U-Boot can do its
business.

Model B rev2 and Model B+ entries were verified by me, the hierarchy and
pid/vid pair for the Version 2 was provided by Peter Chen. Original
Model B is a blind shot, though very likely correct.
Signed-off-by: NLubomir Rintel <lkundrak@v3.sk>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NEric Anholt <eric@anholt.net>

VC4 is the GPU (display and 3D) present on the 283x.
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>

Add interrupt-names properties to dt and apply the correct
mapping between irq and dma channels.
Signed-off-by: NMartin Sperl <kernel@martin.sperl.org>
Acked-by: NMark Rutland <mark.rutland@arm.com>
Acked-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>

Add bcm2835-aux-uart support to the device tree.
Signed-off-by: NMartin Sperl <kernel@martin.sperl.org>
Signed-off-by: NEric Anholt <eric@anholt.net>

This connects the USB driver to the USB power domain, so that USB can
actually be turned on at boot if the bootloader didn't do it for us.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NEric Anholt <eric@anholt.net>
Reviewed-by: NKevin Hilman <khilman@linaro.org>

This patch fixes the naming of the device tree node: uart@7e201000
to conform to the standard of: serial@7e201000
Signed-off-by: NMartin Sperl <kernel@martin.sperl.org>
[anholt: Rebased on 2835.dtsi -> 283x.dtsi change]
Signed-off-by: NEric Anholt <eric@anholt.net>

Signed-off-by: NRemi Pommarel <repk@triplefau.lt>
[anholt: Rebased on 2835.dtsi -> 283x.dtsi change]
Signed-off-by: NEric Anholt <eric@anholt.net>

This enables the use of the auxiliary spi1 and spi2 devices
on the bcm2835 SOC.

Note that this requires the use of the new clk-bcm2835-aux to work.
Signed-off-by: NMartin Sperl <kernel@martin.sperl.org>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
[anholt: Rebased on 2835.dtsi -> 283x.dtsi change]
Signed-off-by: NEric Anholt <eric@anholt.net>

These will be used for enabling UART1, SPI1, and SPI2.
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

The set of peripherals remained constant across bcm2835 (Raspberry Pi
1) and bcm2836 (Raspberry Pi 2), but the CPU was swapped out.  Split
the files so that we can include just peripheral setup in 2836.
Signed-off-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

We need to use it for getting video modes over HDMI.
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>

This will give us the ability to set the pixel and HDMI state machine
clocks for the VC4 KMS driver, change the CPU frequency, and
potentially gate clocks in the future (once we also write a power
domain driver).  It also gives the uart an explicit clock reference,
so that we don't need to change the physical addresses of the old
fixed clk_bcm2835.c clocks for Raspberry Pi 2 port.

Two clocks get their frequencies updated as a result of this.  One is
uart's apb_pclk, which was previously accidentally grabbing the fixed
uart0_pclk due to the apb_pclk not having clk_register_clkdev()
called.  The uart doesn't seem to do anything with apb_pclk other than
make sure it's on, so that appears safe (also, as far as I can see,
the apb clock is actually the same as the VPU clock).  The other is
EMMC, which according to the docs was supposed to be in the 50-100Mhz
range, but it turns out the firmware needed to change to running it at
the 250Mhz core clock speed to avoid a bug in clock domain crossing.

Additionally, anything using BCM2835_CLOCK_VPU will now have a correct
clock rate if the user configures the boot-time core clock speed using
config.txt.
Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>

This patch adds a label for uart0 to allow changing of uart0 pins.
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NEric Anholt <eric@anholt.net>

There exists a tiny MMU, configurable only by the VC (running the
closed firmware), which maps from the ARM's physical addresses to bus
addresses.  These bus addresses determine the caching behavior in the
VC's L1/L2 (note: separate from the ARM's L1/L2) according to the top
2 bits.  The bits in the bus address mean:

From the VideoCore processor:
0x0... L1 and L2 cache allocating and coherent
0x4... L1 non-allocating, but coherent. L2 allocating and coherent
0x8... L1 non-allocating, but coherent. L2 non-allocating, but coherent
0xc... SDRAM alias. Cache is bypassed. Not L1 or L2 allocating or coherent

From the GPU peripherals (note: all peripherals bypass the L1
cache. The ARM will see this view once through the VC MMU):
0x0... Do not use
0x4... L1 non-allocating, and incoherent. L2 allocating and coherent.
0x8... L1 non-allocating, and incoherent. L2 non-allocating, but coherent
0xc... SDRAM alias. Cache is bypassed. Not L1 or L2 allocating or coherent

The 2835 firmware always configures the MMU to turn ARM physical
addresses with 0x0 top bits to 0x4, meaning present in L2 but
incoherent with L1.  However, any bus addresses we were generating in
the kernel to be passed to a device had 0x0 bits.  That would be a
reserved (possibly totally incoherent) value if sent to a GPU
peripheral like USB, or L1 allocating if sent to the VC (like a
firmware property request).  By setting dma-ranges, all of the devices
below it get a dev->dma_pfn_offset, so that dma_alloc_coherent() and
friends return addresses with 0x4 bits and avoid cache incoherency.

This matches the behavior in the downstream 2708 kernel (see
BUS_OFFSET in arch/arm/mach-bcm2708/include/mach/memory.h).
Signed-off-by: NEric Anholt <eric@anholt.net>
Tested-by: NNoralf Trønnes <noralf@tronnes.org>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Signed-off-by: NEric Anholt <eric@anholt.net>
Acked-by: NLee Jones <lee.jones@linaro.org>
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Device tree node names should contain the node's reg property address value.
The i2c0 node was apparently forgotten in commit 25b2f1bd (ARM: bcm2835:
node name unit address cleanup).
Acked-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NBaruch Siach <baruch@tkos.co.il>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

This patch converts all bcm2835 dts and dtsi files to use the pinctrl
header file.
Reviewed-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NStefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Signed-off-by: NFlorian Meier <florian.meier@koalo.de>
[Tweaked slightly to disable by default -- broonie]
Signed-off-by: NMark Brown <broonie@linaro.org>
[swarren, removed duplicate i2s node]
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

DT nodes should be named according to the type of object that they
represent rather than the identity. DT nodes that contain a reg
property should include a unit address in their name. Fix these issues.

Add clock-output-names properties to the nodes so that the clocks get
named something meaningful. This works around the fact that the fixed
clock driver names clocks after the short node name, i.e. not including
the unit address.
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>

DT nodes that contain a reg property should include a unit address in
their name. Add the missing unit addresses.

The unit address in a node name must match the value in the reg property.
Fix the cases where they don't match.

Don't fix the /clocks/* node names yet; that causes problems the clock
driver to attempt to register multiple clocks with the same name, which
fails.
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>

Re-order all the DT nodes so that they're ordered by their reg address.
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>

This adds the definitions for the BCM2835 I2S driver
to the device tree. Some GPIO settings are needed for
the correct pin functions.
Signed-off-by: NFlorian Meier <florian.meier@koalo.de>
[swarren: fixed DT node sort order, simplified DT label name, removed
RPI .dts file changs, since use of I2S is a user-added option.]
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>

This adds the definitions for the BCM2835 dmaengine driver
to the device tree. The dma-channel-mask is currently
fixed. Later it should be set via the firmware.
Signed-off-by: NFlorian Meier <florian.meier@koalo.de>
[swarren, fixed DT node sort order]
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>

The following patch enables performance counter support on Raspberry-Pi.

We have this working on the 2708 based rasp-pi kernels by manually putting
the device registration in the platform files.

This change does things properly in a device tree.  The boot messages look
proper, but my rasp-pi hangs somewhere in USB enabling when running a
stock 3.13-rc6 kernel so I have been unable to fully test this change.

I also understand that the rasp-pi 1176 pmu support is missing the
overflow interrupt.  I'm not sure if that's true of all 2835
implementations.  If not, then this patch will need to be changed a bit.
Signed-off-by: NVince Weaver <vincent.weaver@maine.edu>
[swarren, fixed DT node sort order]
Signed-off-by: NStephen Warren <swarren@wwwdotorg.org>