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* x86: pmc_atom: Expose contents of PSSAndy Shevchenko2015-01-201-3/+58
| | | | | | | | | | | | 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 <andriy.shevchenko@linux.intel.com> Acked-by: Aubrey Li <aubrey.li@linux.intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Kumar P. Mahesh <mahesh.kumar.p@intel.com> Link: http://lkml.kernel.org/r/1421253575-22509-6-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: pmc_atom: Clean up init functionAndy Shevchenko2015-01-201-7/+3
| | | | | | | | | | | There is no need to use err variable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Aubrey Li <aubrey.li@linux.intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Kumar P. Mahesh <mahesh.kumar.p@intel.com> Link: http://lkml.kernel.org/r/1421253575-22509-5-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: pmc-atom: Remove unused macroAndy Shevchenko2015-01-201-2/+0
| | | | | | | | | | | | DRIVER_NAME seems unused. This patch just removes it. There is no functional change. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Aubrey Li <aubrey.li@linux.intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Kumar P. Mahesh <mahesh.kumar.p@intel.com> Link: http://lkml.kernel.org/r/1421253575-22509-4-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: pmc_atom: don%27t check for NULL twiceAndy Shevchenko2015-01-201-4/+0
| | | | | | | | | | | | | 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 <andriy.shevchenko@linux.intel.com> Acked-by: Aubrey Li <aubrey.li@linux.intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Kumar P. Mahesh <mahesh.kumar.p@intel.com> Link: http://lkml.kernel.org/r/1421253575-22509-3-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86: pmc-atom: Assign debugfs node as soon as possibleAndy Shevchenko2015-01-201-1/+3
| | | | | | | | | | | | | | | 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 <tglx@linutronix.de> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Aubrey Li <aubrey.li@linux.intel.com> Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: Kumar P. Mahesh <mahesh.kumar.p@intel.com> Link: http://lkml.kernel.org/r/1421253575-22509-2-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86/platform/pmc_atom: Fix warning when CONFIG_DEBUG_FS=nMartin Kelly2014-09-191-4/+7
| | | | | | | | | | | | | | | 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 <martkell@amazon.com> Acked-by: "Li, Aubrey" <aubrey.li@linux.intel.com> 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 <mingo@kernel.org>
* x86/pmc_atom: Silence shift wrapping warnings in pmc_sleep_tmr_show()Dan Carpenter2014-08-021-5/+5
| | | | | | | | | | | 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 <dan.carpenter@oracle.com> Acked-by: Aubrey Li <aubrey.li@linux.intel.com> Link: http://lkml.kernel.org/r/20140801082715.GE28869@mwanda Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* x86/pmc_atom: Expose PMC device state and platform sleep stateLi, Aubrey2014-07-251-0/+175
| | | | | | | | | | | | | | 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 <aubrey.li@linux.intel.com> Link: http://lkml.kernel.org/r/53B0FF59.8000600@linux.intel.com Signed-off-by: Kasagar, Srinidhi <srinidhi.kasagar@intel.com> Reviewed-by: Rudramuni, Vishwesh M <vishwesh.m.rudramuni@intel.com> Reviewed-by: Joe Perches <joe@perches.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86/pmc_atom: Eisable a few S0ix wake up events for S0ix residencyLi, Aubrey2014-07-251-0/+42
| | | | | | | | | | | | | | 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 <aubrey.li@linux.intel.com> Link: http://lkml.kernel.org/r/53B0FF22.5080403@linux.intel.com Signed-off-by: Olivier Leveque <olivier.leveque@intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
* x86/platform: New Intel Atom SOC power management controller driverLi, Aubrey2014-07-251-0/+104
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 <aubrey.li@linux.intel.com> Link: http://lkml.kernel.org/r/53B0FEEA.3010805@linux.intel.com Signed-off-by: Lejun Zhu <lejun.zhu@linux.intel.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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