linux.git/arch/powerpc/platforms/83xx, branch vsnprintf

powerpc: rename SPRN_HID2 define to SPRN_HID2_750FX

2024-05-07T14:25:00+00:00

This register number is hardware-specific, rename it for clarity.

FIXME comments are added in a few places where it seems like the wrong
register is used. As I can't test this, only the rename is done with no
functional change.

Signed-off-by: Matthias Schiffer 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20240124105031.45734-1-matthias.schiffer@ew.tq-group.com

powerpc/83xx: Fix build failure with FPU=n

2024-03-07T12:06:19+00:00

Building eg. 83xx/mpc832x_rdb_defconfig with FPU=n, fails with:

  arch/powerpc/platforms/83xx/suspend.c: In function 'mpc83xx_suspend_enter':
  arch/powerpc/platforms/83xx/suspend.c:209:17: error: implicit declaration of function 'enable_kernel_fp'
    209 |                 enable_kernel_fp();

Fix it by providing an enable_kernel_fp() stub for FPU=n builds,
which allows using IS_ENABLED(CONFIG_PPC_FPU) around the call to
enable_kernel_fp().

Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20240306125853.3714578-2-mpe@ellerman.id.au

powerpc/machdep: Define 'compatibles' property in ppc_md and use it

2024-03-03T11:20:29+00:00

Most probe functions that do not use the 'compatible' string do
nothing else than checking whether the machine is compatible with
one of the strings in a NULL terminated table of strings.

Define that table of strings in ppc_md structure and check it directly
from probe_machine() instead of using ppc_md.probe() for that.

Keep checking in ppc_md.probe() only for more complex probing.

All .compatible could be replaced with a single element NULL
terminated list but that's not worth the churn. Can be do incrementaly
in follow-up patches.

Signed-off-by: Christophe Leroy 
Reviewed-by: Rob Herring 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20231214103152.12269-4-mpe@ellerman.id.au

powerpc/mpc83xx: Use wait_event_freezable() for freezable kthread

2023-12-21T11:10:16+00:00

A freezable kernel thread can enter frozen state during freezing by
either calling try_to_freeze() or using wait_event_freezable() and its
variants. So for the following snippet of code in a kernel thread loop:
  wait_event_interruptible();
  try_to_freeze();

We can change it to a simple wait_event_freezable() and then eliminate
a function call.

Signed-off-by: Kevin Hao 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20231221044510.1802429-3-haokexin@gmail.com

powerpc/mpc83xx: Add the missing set_freezable() for agent_thread_fn()

2023-12-21T11:10:13+00:00

The kernel thread function agent_thread_fn() invokes the try_to_freeze()
in its loop. But all the kernel threads are non-freezable by default.
So if we want to make a kernel thread to be freezable, we have to invoke
set_freezable() explicitly.

Signed-off-by: Kevin Hao 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20231221044510.1802429-2-haokexin@gmail.com

powerpc: Untangle fixmap.h and pgtable.h and mmu.h

2023-10-19T06:12:44+00:00

fixmap.h need pgtable.h for [un]map_kernel_page()

pgtable.h need fixmap.h for FIXADDR_TOP.

Untangle the two files by moving FIXADDR_TOP into pgtable.h

Also move VIRT_IMMR_BASE to fixmap.h to avoid fixmap.h in mmu.h

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/5eba12392a018be28ad0a02ed844767b132589e7.1695659959.git.christophe.leroy@csgroup.eu

powerpc/83xx: Split usb.c

2023-08-18T07:03:14+00:00

usb.c contains three independent parts with no common part.

Split it.

Signed-off-by: Christophe Leroy 
[mpe: Drop usb.o from Makefile to fix build]
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/75712b54bf9cb85ab10e47cd2772cd2a098ca895.1692199324.git.christophe.leroy@csgroup.eu

powerpc/83xx: Fix style problems in usb.c and remove unneccessary includes from mpc83xx.h

2023-08-18T07:03:13+00:00

Replace printk(KERN_WARN with pr_warn(

Remove a couple of blank lines

Re-align multi-line code.

Replace asm/io.h by linux/io.h

mpc83xx.h doesn't need linux/device.h or asm/pci-bridge.h

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/2cb498f637e082a4af8032311fad3cae84d6aa5d.1692199324.git.christophe.leroy@csgroup.eu

powerpc: Explicitly include correct DT includes

2023-08-02T12:22:19+00:00

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring 
[mpe: Fixup maple/setup.c which needs platform_device]
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20230724210247.778034-1-robh@kernel.org

powerpc: Switch i2c drivers back to use .probe()

2023-06-14T02:46:41+00:00

After commit b8a1a4cd5a98 ("i2c: Provide a temporary .probe_new()
call-back type"), all drivers being converted to .probe_new() and then
03c835f498b5 ("i2c: Switch .probe() to not take an id parameter")
convert back to (the new) .probe() to be able to eventually drop
.probe_new() from struct i2c_driver.

Signed-off-by: Uwe Kleine-König 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20230525205622.734093-1-u.kleine-koenig@pengutronix.de