BCM270x: Clean out unused code

These devices do not have a matching driver.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

BCM270x: Make uart1 work with Device Tree

hwmon: Remove bcm2835-hwmon

BCM270X_DT: Enable 'make clean' on overlays directory

Always add the overlays directory to subdir so it can be
cleaned with 'make clean'.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

bcm2835-thermal combined with the configs HWMON=y and
THERMAL_HWMON=y, gives the same functionality.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Add uart1 to Device Tree. Enable it in AUXENB when it's used.
Remove old platform device.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Use virt_to_dma (not ideal, I know) to calculate the virt-to-bus
offset. This will make use of the "dma-ranges" property, if
present.

BCM270x_DT: Configure UART using DT

See: https://github.com/raspberrypi/firmware/issues/393

ARCH_BCM2835 closing in on ARCH_BCM270X

These commands where used to make this commit:

./scripts/diffconfig -m arch/arm/configs/bcm2835_defconfig arch/arm/configs/bcmrpi_defconfig > merge.cfg

cat << EOF > filter
CONFIG_ARCH_BCM2708
CONFIG_BCM2708_DT
CONFIG_ARM_PATCH_PHYS_VIRT
CONFIG_PHYS_OFFSET
CONFIG_CMDLINE
CONFIG_BCM2708_WDT
CONFIG_HW_RANDOM_BCM2708
CONFIG_I2C_BCM2708
CONFIG_SPI_BCM2708
CONFIG_SND_BCM2708_SOC_I2S
CONFIG_USB_DWCOTG
CONFIG_LIRC_RPI
EOF

grep -F -v -f filter merge.cfg > filtered.cfg

cat << EOF > added.cfg
CONFIG_WATCHDOG=y
CONFIG_BCM2835_WDT=y
CONFIG_MISC_FILESYSTEMS=y
CONFIG_SND_BCM2835_SOC_I2S=m
EOF

ARCH=arm scripts/kconfig/merge_config.sh arch/arm/configs/bcm2835_defconfig filtered.cfg added.cfg
ARCH=arm make oldconfig

ARCH=arm make savedefconfig
cp defconfig arch/arm/configs/bcm2835_defconfig

rm merge.cfg filter filtered.cfg added.cfg defconfig

ARCH=arm make bcm2835_defconfig
ARCH=arm make oldconfig

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Change kconfig dependency to make SND_BCM2708_SOC_* and
VIDEO_BCM2835 available on ARCH_BCM2835.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Build Device Tree overlays on ARCH_BCM2835.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

The VideoCore bootloader passes in Serial number and
Revision number through Device Tree. Make these available to
userspace through /proc/cpuinfo.

Mainline status:

There is a commit in linux-next that standardize passing the serial
number through Device Tree (string: /serial-number):
ARM: 8355/1: arch: Show the serial number from devicetree in cpuinfo

There was an attempt to do the same with the revision number, but it
didn't get in:
[PATCH v2 1/2] arm: devtree: Set system_rev from DT revision

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

BCM270x: Make bcm2835-pm-wdt and bcm2835-rng available

Add thermal sensor support to ARCH_BCM2835

This makes it possible to use the mainline watchdog and
random generator drivers:
dtparam=watchdog=on
dtparam=random=on

bcm2708_wdog and bcm2708-rng can still be used.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Change the kconfig dependency to make bcm2835_wdt and bcm2835-rng
available on ARCH_BCM2708 and ARCH_BCM2709.
Enable them as loadable modules in bcmrpi_defconfig and
bcm2709_defconfig.

There is a commit in linux-next that will move restart/pm_power_off
to bcm2835_wdt for ARCH_BCM2835. This will not affect ARCH_BCM270x
since arm_pm_restart (.restart = bcm2708_restart) and
pm_power_off (=bcm2708_power_off) is set in
arch/arm/mach-bcm270X/bcm270X.c and will take presedence.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Add the BCM2835 thermal sensor to Device Tree.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Add Device Tree support to bcm2835-thermal driver.
Add thermal sensor device to Device Tree.
Don't add platform device when booting in DT mode.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

BCM270x: Add USB controller to Device Tree

BCM270x: Move vc_mem

Add Device Tree support to dwc_otg driver.
Add device to Device Tree.
Don't add platform devices when booting in DT mode.

Tested on Pi1 and Pi2 with and without DT.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Add Device Tree overlay for 3.5" display by tinylcd.com

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

Add a new trailer field indicating whether this is an ARCH_BCM2835
build, as opposed to MACH_BCM2708/9. If the loader finds this flag
is set it changes the default base dtb file name from bcm270x...
to bcm283y...

Also update knlinfo to show the status of the field.

Make the vc_mem module available for ARCH_BCM2835 by moving it.

Signed-off-by: Noralf Trønnes <noralf@tronnes.org>

The Raspberry Pi firmware looks for a trailer on the kernel image to
determine whether it was compiled with Device Tree support enabled.
If the firmware finds a kernel without this trailer, or which has a
trailer indicating that it isn't DT-capable, it disables DT support
and reverts to using ATAGs.

The mkknlimg utility adds that trailer, having first analysed the
image to look for signs of DT support and the kernel version string.

knlinfo displays the contents of the trailer in the given kernel image.