linux-toradex.git/arch/x86/kernel/pmc_atom.c, branch v4.2.7

x86: pmc_atom: Expose contents of PSS

2015-01-20T11:50:14+00:00

The PSS register reflects the power state of each island on SoC. It would be
useful to know which of the islands is on or off at the momemnt.

Signed-off-by: Andy Shevchenko 
Acked-by: Aubrey Li 
Cc: Rafael J. Wysocki 
Cc: Kumar P. Mahesh 
Link: http://lkml.kernel.org/r/1421253575-22509-6-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Thomas Gleixner

x86: pmc_atom: Clean up init function

2015-01-20T11:50:14+00:00

There is no need to use err variable.

Signed-off-by: Andy Shevchenko 
Acked-by: Aubrey Li 
Cc: Rafael J. Wysocki 
Cc: Kumar P. Mahesh 
Link: http://lkml.kernel.org/r/1421253575-22509-5-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Thomas Gleixner

x86: pmc-atom: Remove unused macro

2015-01-20T11:50:14+00:00

DRIVER_NAME seems unused. This patch just removes it. There is no functional
change.

Signed-off-by: Andy Shevchenko 
Cc: Aubrey Li 
Cc: Rafael J. Wysocki 
Cc: Kumar P. Mahesh 
Link: http://lkml.kernel.org/r/1421253575-22509-4-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Thomas Gleixner

x86: pmc_atom: don%27t check for NULL twice

2015-01-20T11:50:14+00:00

debugfs_remove_recursive() is NULL-aware, thus, we may safely remove the check
here. There is no need to assing NULL to variable since it will be not used
anywhere.

Signed-off-by: Andy Shevchenko 
Acked-by: Aubrey Li 
Cc: Rafael J. Wysocki 
Cc: Kumar P. Mahesh 
Link: http://lkml.kernel.org/r/1421253575-22509-3-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Thomas Gleixner

x86: pmc-atom: Assign debugfs node as soon as possible

2015-01-20T11:50:14+00:00

pmc_dbgfs_unregister() will be called when pmc->dbgfs_dir is unconditionally
NULL on error path in pmc_dbgfs_register(). To prevent this we move the
assignment to where is should be.

Fixes: f855911c1f48 (x86/pmc_atom: Expose PMC device state and platform sleep state)
Reported-by: Thomas Gleixner 
Signed-off-by: Andy Shevchenko 
Cc: Aubrey Li 
Cc: Rafael J. Wysocki 
Cc: Kumar P. Mahesh 
Link: http://lkml.kernel.org/r/1421253575-22509-2-git-send-email-andriy.shevchenko@linux.intel.com
Signed-off-by: Thomas Gleixner

x86/platform/pmc_atom: Fix warning when CONFIG_DEBUG_FS=n

2014-09-19T11:02:21+00:00

When compiling with CONFIG_DEBUG_FS=n, GCC emits an unused
variable warning for pmc_atom.c because "ret" is used only
within the CONFIG_DEBUG_FS block.

This patch adds a dummy #ifdef for pmc_dbgfs_register() when
CONFIG_DEBUG_FS=n to simplify the code and remove the warning.

Signed-off-by: Martin Kelly 
Acked-by: "Li, Aubrey" 
Cc: vishwesh.m.rudramuni@intel.com
Link: http://lkml.kernel.org/r/1410963476-8360-1-git-send-email-martin@martingkelly.com
Signed-off-by: Ingo Molnar

x86/pmc_atom: Silence shift wrapping warnings in pmc_sleep_tmr_show()

2014-08-02T23:52:17+00:00

I don't know if we really need 64 bits here but these variables are
declared as u64 and it can't hurt to cast this so we prevent any shift
wrapping.

Signed-off-by: Dan Carpenter 
Acked-by: Aubrey Li 
Link: http://lkml.kernel.org/r/20140801082715.GE28869@mwanda
Signed-off-by: H. Peter Anvin

x86/pmc_atom: Expose PMC device state and platform sleep state

2014-07-25T21:12:14+00:00

Add the following interfaces to exposes PMC device state and sleep
state residency via debugfs:
	/sys/kernel/debugfs/pmc_atom/dev_state
	/sys/kernel/debugfs/pmc_atom/sleep_state

Signed-off-by: Aubrey Li 
Link: http://lkml.kernel.org/r/53B0FF59.8000600@linux.intel.com
Signed-off-by: Kasagar, Srinidhi 
Reviewed-by: Rudramuni, Vishwesh M 
Reviewed-by: Joe Perches 
Signed-off-by: H. Peter Anvin

x86/pmc_atom: Eisable a few S0ix wake up events for S0ix residency

2014-07-25T21:11:58+00:00

Disable PMC S0IX_WAKE_EN events coming from LPC block(unused) and
also from GPIO_SUS ored dedicated IRQs (must be disabled as per PMC
programming rule), GPIOSCORE ored dedicated IRQs (must be disabled
as per PMC programming rule), GPIO_SUS shared IRQ (not necessary
since the IOAPIC_DS wake event will still work), GPIO_SCORE shared
IRQ (not necessary since the IOAPIC_DS wake event will still work).

Signed-off-by: Aubrey Li 
Link: http://lkml.kernel.org/r/53B0FF22.5080403@linux.intel.com
Signed-off-by: Olivier Leveque 
Signed-off-by: H. Peter Anvin

x86/platform: New Intel Atom SOC power management controller driver

2014-07-25T21:11:29+00:00

The Power Management Controller (PMC) controls many of the power
management features present in the Atom SoC. This driver provides
a native power off function via PMC PCI IO port.

On some ACPI hardware-reduced platforms(e.g. ASUS-T100), ACPI sleep
registers are not valid so that (*pm_power_off)() is not hooked by
acpi_power_off(). The power off function in this driver is installed
only when pm_power_off is NULL.

Signed-off-by: Aubrey Li 
Link: http://lkml.kernel.org/r/53B0FEEA.3010805@linux.intel.com
Signed-off-by: Lejun Zhu 
Signed-off-by: H. Peter Anvin