linux-toradex.git/drivers/macintosh, branch v4.19-rc8

macintosh: therm_windtunnel: drop using attach_adapter

2018-08-24T12:42:42+00:00

As we now have deferred probing, we can use a custom mechanism and
finally get rid of the legacy interface from the i2c core.

Signed-off-by: Wolfram Sang 
Acked-by: Michael Ellerman

macintosh/via-pmu: Disambiguate interrupt statistics

2018-07-31T09:56:43+00:00

Some of the event counters are overloaded which makes it very
difficult to interpret their values.

Counter 0 is supposed to report CB1 interrupts but it can also count
PMU_INT_WAITING_CHARGER events.

Counter 1 is supposed to report GPIO interrupts but it can also count
other events (depending upon the value of the PMU_INT_ADB bit).

Disambiguate these statistics with dedicated counters for GPIO and
CB1 interrupts.

Comments in the MkLinux source code say that the type 0 and type 1
interrupts are model-specific. Label them as "unknown".

This change to the contents of /proc/pmu/interrupts is by necessity
visible in userland. However, packages which interact with the PMU
(that is, pbbuttonsd, pmac-utils and pmud) don't open this file.
AFAIK, user software has no need to poll these counters.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Michael Ellerman

macintosh/via-pmu: Clean up interrupt statistics

2018-07-31T09:56:43+00:00

Replace an open-coded ffs() with the function call.
Simplify an if-else cascade using a switch statement.
Correct a typo and an indentation issue.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Reviewed-by: Geert Uytterhoeven 
Signed-off-by: Michael Ellerman

macintosh/via-pmu: Replace via-pmu68k driver with via-pmu driver

2018-07-31T09:56:42+00:00

Now that the PowerMac via-pmu driver supports m68k PowerBooks,
switch over to that driver and remove the via-pmu68k driver.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Reviewed-by: Geert Uytterhoeven 
Acked-by: Geert Uytterhoeven 
Signed-off-by: Michael Ellerman

macintosh/via-pmu68k: Don't load driver on unsupported hardware

2018-07-31T09:56:42+00:00

Don't load the via-pmu68k driver on early PowerBooks. The M50753 PMU
device found in those models was never supported by this driver.
Attempting to load the driver usually causes a boot hang.

Signed-off-by: Finn Thain 
Reviewed-by: Michael Schmitz 
Acked-by: Geert Uytterhoeven 
Signed-off-by: Michael Ellerman

macintosh/via-pmu: Explicitly specify CONFIG_PPC_PMAC dependencies

2018-07-31T09:56:41+00:00

At present, CONFIG_ADB_PMU depends on CONFIG_PPC_PMAC. When this gets
relaxed to CONFIG_PPC_PMAC || CONFIG_MAC, those Kconfig symbols with
implicit deps on PPC_PMAC will need explicit deps. Add them now.
No functional change.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Michael Ellerman

macintosh/via-pmu: Add support for m68k PowerBooks

2018-07-31T09:56:41+00:00

Put #ifdefs around the Open Firmware, xmon, interrupt dispatch,
battery and suspend code. Add the necessary interrupt handling to
support m68k PowerBooks.

The pmu_kind value is available to userspace using the
PMU_IOC_GET_MODEL ioctl. It is not clear yet what hardware classes
are be needed to describe m68k PowerBook models, so pmu_kind is given
the provisional value PMU_UNKNOWN.

To find out about the hardware, user programs can use /proc/bootinfo
or /proc/hardware, or send the PMU_GET_VERSION command using /dev/adb.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Michael Ellerman

macintosh/via-pmu: Replace via pointer with via1 and via2 pointers

2018-07-31T09:56:40+00:00

On most PowerPC Macs, the PMU driver uses the shift register and
IO port B from a single VIA chip.

On 68k and early PowerPC PowerBooks, the driver uses the shift register
from one VIA chip together with IO port B from another.

Replace via with via1 and via2 to accommodate this. For the
CONFIG_PPC_PMAC case, set via1 = via2 so there is no change.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Michael Ellerman

macintosh/via-pmu: Enhance state machine with new 'uninitialized' state

2018-07-31T09:56:40+00:00

On 68k Macs, the via/vias pointer can't be used to determine whether
the PMU driver has been initialized. For portability, add a new state
to indicate that via_find_pmu() succeeded.

After via_find_pmu() executes, testing vias == NULL is equivalent to
testing via == NULL. Replace these tests with pmu_state == uninitialized
which is simpler and more consistent. No functional change.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Signed-off-by: Michael Ellerman

macintosh/via-pmu: Don't clear shift register interrupt flag twice

2018-07-31T09:56:39+00:00

The shift register interrupt flag gets cleared in via_pmu_interrupt()
and once again in pmu_sr_intr(). Fix this theoretical race condition.

Tested-by: Stan Johnson 
Signed-off-by: Finn Thain 
Reviewed-by: Geert Uytterhoeven 
Signed-off-by: Michael Ellerman