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This adds the cpus node to the Integrator/AP device tree so
that we have a proper placeholder to put in the DT-defined
operating points for the generic DT/OPP cpufreq driver,
along with the proper operating points.
The old Integrator cpufreq driver would resolve the max
frequency to 71MHz, and the min frequency to 12 MHz, but
the clock driver can actually handle any frequency inbetween
so I picked a few select frequencies as OPPs. The cpufreq
framework doesn't seem to deal with sliding frequency scales,
only fixed points so 7 OPPs is better than 2 atleast.
We define a CPU node since this is required for cpufreq-dt,
however we do not define any compatible string for the CPU
since this architecture has pluggable CPU modules and we
do not know which one will be used. If necessary, the CPU
compatible can be filled in by the boot loader, but for
just cpufreq-dt it is not required.
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Russell King <linux@armlinux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator into next/late
Pull "This is a bunch of Integrator changes for v4.9" Linus Walleij:
- Add and fix a bunch of clocks in the DTS corresponding
to the new clock support merged into the clk tree.
- Move the CLCD display configuration from boardfile to
device tree using the new CLCD support merged into the
fbdev tree.
- Cut some auxdata.
- Cut some static remappings.
- Move the sched_clock() counter to use syscon+regmap.
* tag 'integrator-armsoc-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-integrator:
ARM: integrator: read counter using syscon/regmap
ARM: integrator: cut down on static maps
ARM: integrator: delete some auxdata
ARM: integrator: move CP CLCD display to DTS
ARM: dts: add the core module clocks to Integrator/CP
ARM: dts: Add the core module clocks to Integrator/AP
ARM: dts: add the Integrator/AP baseboard clocks
ARM: dts: set the 24MHz xtal as parent of the UART clock
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This adds the clocks on the core module to the Integrator/AP
board: a 24MHz chrystal, and two special-purpose ICST525
dividers, one used to clock the CPU core and another auxilary
oscillator.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The two clocks present on the Integrator/AP baseboard and
accessible through its system controller is the PCIv3 bridge
clock and the PCI bus clock. Define the proper device tree
nodes for these.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This has no practical effect but reflects the actual clock
hierarchy of the system.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This syscon needs to be looked up by clocks, flash protection
and other consumers.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The Integrator has a custom <mach/memory.h> header defining the
BUS_OFFSET for *_to_bus and bus_to_* operations as offset from
0x80000000.
This switches the Integrator over to using the mechanism
introduced for the Keystone to provide the same offset using
the device tree, deletes <mach/memory.h> and augments the
Integrator device tree to provide the bus offset.
Cc: Grygorii Strashko <grygorii.strashko@ti.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Jonathan Austin <jonathan.austin@arm.com>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This adds the clock definitions to the Integrator/CP
and Integrator/AP device trees.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This augments the core machine code for the Integrator platforms
to get their references to the core module device nodes by
using compatible strings instead of predefined node names
and rename the CP syscon node to be simply "syscon".
Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The OF/DT boot path needs to get the LM (Logical Module)
IRQs from the device tree for coherency. This augments the
DT syscon node to contain these IRQs and alter the DT LM
code to get them from there.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This alters the local side address of the iospace to zero,
non prefetchable memory local side address to 0x00000000 and
prefetchable memory local side address to 0x10000000,
so as to match the values actually poked in by the driver.
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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This registers the memory ranges for I/O, non-prefetched and
prefetched memory and configuration space for the PCIv3 bridge
and let us fetch these basic memory resources from the device
tree in the device tree boot path. Remove the stepping stone
platform device. This is an either/or approach - the platform
data path is mutually exclusive to the plain platform data
path and provided addresses from the device tree have to be
correct.
This adds the interrupt-map property to the PCIv3 DTS file
and makes the bridge obtain mappings from the device tree.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This hooks the Integrator/AP into the SoC bus when booting from
device tree, by mapping the AP controller registers first,
then registering the SoC device, and then populating the device
tree with the SoC device as parent.
Introduce some helpers in the core to provide sysfs files
detailing the use of the SoC ID which will later be reused by
the Integrator/CP patch for the same bus grouping.
Cc: Lee Jones <lee.jones@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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This converts the AMBA (PrimeCell) devices on the Integrator/AP
and Integrator/CP over to probing from the Device Tree if the
kernel is compiled for Device Tree support.
We continue to #ifdef out all non-DT code and vice versa on
respective boot type to get a clean cut.
We need to add a bunch of auxdata (compare to the Versatile)
to handle bus names and callbacks alike.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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This is initial device tree support for the ARM Integrator family,
we create a very basic device tree, #ifdef out the non-DT machines
when compiling for device tree.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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