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* c6x/timer64: Set ->min_delta_ticks and ->max_delta_ticksNicolai Stange2017-04-141-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | In preparation for making the clockevents core NTP correction aware, all clockevent device drivers must set ->min_delta_ticks and ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a clockevent device's rate is going to change dynamically and thus, the ratio of ns to ticks ceases to stay invariant. Make the c6x arch's clockevent driver initialize these fields properly. This patch alone doesn't introduce any change in functionality as the clockevents core still looks exclusively at the (untouched) ->min_delta_ns and ->max_delta_ns. As soon as this has changed, a followup patch will purge the initialization of ->min_delta_ns and ->max_delta_ns from this driver. Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: linux-c6x-dev@linux-c6x.org Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
* c6x: Remove unnecessary of_platform_populate with default match tableKefeng Wang2016-06-232-18/+1
| | | | | | | | | | | After patch "of/platform: Add common method to populate default bus", it is possible for arch code to remove unnecessary callers of of_platform_populate with default match table. Cc: Mikael Starvik <starvik@axis.com> Cc: Jesper Nilsson <jesper.nilsson@axis.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Rob Herring <robh@kernel.org>
* c6x: Fix misspellings in comments.Adam Buchbinder2016-04-181-1/+1
| | | | | Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* irqdomain: Use irq_domain_get_of_node() instead of direct field accessMarc Zyngier2015-10-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | The struct irq_domain contains a "struct device_node *" field (of_node) that is almost the only link between the irqdomain and the device tree infrastructure. In order to prepare for the removal of that field, convert all users to use irq_domain_get_of_node() instead. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-and-tested-by: Hanjun Guo <hanjun.guo@linaro.org> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: <linux-arm-kernel@lists.infradead.org> Cc: Tomasz Nowicki <tomasz.nowicki@linaro.org> Cc: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Cc: Graeme Gregory <graeme@xora.org.uk> Cc: Jake Oshins <jakeo@microsoft.com> Cc: Jiang Liu <jiang.liu@linux.intel.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Rafael J. Wysocki <rjw@rjwysocki.net> Link: http://lkml.kernel.org/r/1444737105-31573-2-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* genirq: Remove irq argument from irq flow handlersThomas Gleixner2015-09-161-1/+1
| | | | | | | | | | | | | | Most interrupt flow handlers do not use the irq argument. Those few which use it can retrieve the irq number from the irq descriptor. Remove the argument. Search and replace was done with coccinelle and some extra helper scripts around it. Thanks to Julia for her help! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Jiang Liu <jiang.liu@linux.intel.com>
* Merge branch 'irq-core-for-linus' of ↵Linus Torvalds2015-09-011-3/+4
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull irq updates from Thomas Gleixner: "This updated pull request does not contain the last few GIC related patches which were reported to cause a regression. There is a fix available, but I let it breed for a couple of days first. The irq departement provides: - new infrastructure to support non PCI based MSI interrupts - a couple of new irq chip drivers - the usual pile of fixlets and updates to irq chip drivers - preparatory changes for removal of the irq argument from interrupt flow handlers - preparatory changes to remove IRQF_VALID" * 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (129 commits) irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources irqchip: Add bcm2836 interrupt controller for Raspberry Pi 2 irqchip: Add documentation for the bcm2836 interrupt controller irqchip/bcm2835: Add support for being used as a second level controller irqchip/bcm2835: Refactor handle_IRQ() calls out of MAKE_HWIRQ PCI: xilinx: Fix typo in function name irqchip/gic: Ensure gic_cpu_if_up/down() programs correct GIC instance irqchip/gic: Only allow the primary GIC to set the CPU map PCI/MSI: pci-xgene-msi: Consolidate chained IRQ handler install/remove unicore32/irq: Prepare puv3_gpio_handler for irq argument removal tile/pci_gx: Prepare trio_handle_level_irq for irq argument removal m68k/irq: Prepare irq handlers for irq argument removal C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removal blackfin: Prepare irq handlers for irq argument removal arc/irq: Prepare idu_cascade_isr for irq argument removal sparc/irq: Use access helper irq_data_get_affinity_mask() sparc/irq: Use helper irq_data_get_irq_handler_data() parisc/irq: Use access helper irq_data_get_affinity_mask() mn10300/irq: Use access helper irq_data_get_affinity_mask() irqchip/i8259: Prepare i8259_irq_dispatch for irq argument removal ...
| * C6X/megamode-pic: Prepare megamod_irq_cascade for irq argument removalThomas Gleixner2015-07-311-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The irq argument of most interrupt flow handlers is unused or merily used instead of a local variable. The handlers which need the irq argument can retrieve the irq number from the irq descriptor. Search and update was done with coccinelle and the invaluable help of Julia Lawall. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Julia Lawall <Julia.Lawall@lip6.fr> Cc: Mark Salter <msalter@redhat.com> Cc: linux-c6x-dev@linux-c6x.org
| * C6X/meagmod-pic: Consolidate chained IRQ handler install/removeThomas Gleixner2015-07-271-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Chained irq handlers usually set up handler data as well. We now have a function to set both under irq_desc->lock. Replace the two calls with one. Search and conversion was done with coccinelle. Reported-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: linux-c6x-dev@linux-c6x.org Cc: Julia Lawall <Julia.Lawall@lip6.fr> Link: http://lkml.kernel.org/r/20150713130429.697731509@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | c6x/timer64: Migrate to new 'set-state' interfaceViresh Kumar2015-08-101-25/+27
|/ | | | | | | | | | | | | | | | | | Migrate c6x driver to the new 'set-state' interface provided by clockevents core, the earlier 'set-mode' interface is marked obsolete now. This also enables us to implement callbacks for new states of clockevent devices, for example: ONESHOT_STOPPED. We weren't doing anything in ->set_mode(RESUME) and so tick_resume() isn't implemented. Cc: Mark Salter <msalter@redhat.com> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: linux-c6x-dev@linux-c6x.org Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
* c6x: platforms: cache: Export symbol L1P_cache_block_invalidate and ↵Chen Gang2015-03-261-0/+2
| | | | | | | | | | | | | L1D_cache_block_writeback They are needed by other modules, the related error with allmodconfig: MODPOST 3327 modules ERROR: "L1P_cache_block_invalidate" [drivers/misc/lkdtm.ko] undefined! ERROR: "L1D_cache_block_writeback" [drivers/misc/lkdtm.ko] undefined! Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Mark Salter <msalter@redhat.com>
* C6X: add basic support for TMS320C6678 SoCKen Cox2012-07-182-0/+69
| | | | | | | | | | | | This patch adds support for the TMS320C6678 SoC on an EVMC6678LE evaluation board. The 6678 is a C66x family CPU which is very similar to the already supported C64x CPUs with the addition of floating point instructions. Signed-off-by: Ken Cox <jkc@redhat.com> Signed-off-by: Mark Salter <msalter@redhat.com> CC: Aurelien Jacquiot <a-jacquiot@ti.com> CC: linux-c6x-dev@linux-c6x.org
* C6X: remove megamod-pic requirement on direct-mapped core picMark Salter2012-07-181-9/+19
| | | | | | | | | | The megamodule PIC cascades a number of interrupt sources into the core priority PIC. The megamodule code depends on the core hardware interrupt numbers being mapped one-to-one with regard to linux interrupt numbers. This patch removes that dependence in order to pave the way for removing the direct mapping in the core PIC code. Signed-off-by: Mark Salter <msalter@redhat.com>
* Disintegrate asm/system.h for C6XDavid Howells2012-03-281-0/+1
| | | | | | | | Disintegrate asm/system.h for C6X. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Mark Salter <msalter@redhat.com> cc: linux-c6x-dev@linux-c6x.org
* irq_domain/c6x: Use library of xlate functionsGrant Likely2012-02-161-13/+1
| | | | | | | | | The c6x irq controllers don't need to define custom .xlate hooks Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Rob Herring <rob.herring@calxeda.com> Cc: Mark Salter <msalter@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de>
* irq_domain/c6x: constify irq_domain structuresGrant Likely2012-02-161-1/+1
| | | | | | Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Mark Salter <msalter@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de>
* irq_domain/c6x: Convert c6x to use generic irq_domain support.Mark Salter2012-02-161-7/+6
| | | | | | | | | | | | The C6X IRQ support was copied almost verbatim from the PowerPC virtual IRQ code. The PowerPC code was used as the basis for generic irq_domain support, so this patch mostly copies what what done to arch/powerpc by Grant Likely in his irq_domain patch series. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Aurelien Jacquiot <a-jacquiot@ti.com> Cc: Thomas Gleixner <tglx@linutronix.de>
* C6X: fix timer64 initializationMark Salter2012-01-081-1/+9
| | | | | | | | | | | Some SoCs have a timer block enable controlled through the DSCR registers. There is a problem in the timer64 driver initialization where the code accesses a timer register to get the divisor used to calculate timer clock rate. If the timer block has not been enabled when this register read takes place, an exception is generated. This patch makes sure that the timer block is enabled before accessing the registers. Signed-off-by: Mark Salter <msalter@redhat.com>
* C6X: fix layout of EMIFA registersMark Salter2012-01-081-1/+0
| | | | Signed-off-by: Mark Salter <msalter@redhat.com>
* C6X: DSCR - Device State Configuration RegistersMark Salter2011-10-061-0/+598
| | | | | | | | | | | | | | All SoCs provide an area of device configuration registers called the DSCR. The location of specific registers as well as their use varies considerably from implementation to implementation. Rather than having to rely on additional SoC-specific DSCR code for each new supported SoC, this code generalize things as much as possible using device tree properties. Initialization must take place early on (setup_arch time) in case the event timer device needs to be enable via the DSCR. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* C6X: EMIF - External Memory InterfaceMark Salter2011-10-061-0/+88
| | | | | | | | | | | | | | Several SoC parts provide a simple bridge to support external memory mapped devices. This code probes the device tree for an EMIF node and sets up the bridge registers if such a node is found. Beyond initial set up, there is no further need to access the bridge control registers. External devices on the bus are accessed through their MMIO registers using suitable drivers. The bridge hardware does provide for timeout and other error interrupts, but these are not yet supported. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* C6X: cache controlAurelien Jacquiot2011-10-061-0/+445
| | | | | | | | | Original port to early 2.6 kernel using TI COFF toolchain. Brought up to date by Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Mark Salter <msalter@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* C6X: clocksMark Salter2011-10-062-0/+848
| | | | | | | | | | | The C6X SoCs contain several PLL controllers each with up to 16 clock outputs feeding into the cores or peripheral clock domains. The hardware is very similar to arm/mach-davinci clocks. This is still a work in progress which needs to be updated once device tree clock binding changes shake out. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* C6X: interrupt handlingAurelien Jacquiot2011-10-061-0/+349
| | | | | | | | | | Original port to early 2.6 kernel using TI COFF toolchain. Brought up to date by Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Mark Salter <msalter@redhat.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
* C6X: time managementAurelien Jacquiot2011-10-061-0/+236
| | | | | | | | | | Original port to early 2.6 kernel using TI COFF toolchain. Brought up to date by Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Mark Salter <msalter@redhat.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Arnd Bergmann <arnd@arndb.de>
* C6X: devicetree supportMark Salter2011-10-061-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the basic devicetree support for C6X. Currently, four boards are supported. Each one uses a different SoC part. Two of the four supported SoCs are multicore. One with 3 cores and the other with 6 cores. There is no coherency between the core-level caches, so SMP is not an option. It is possible to run separate kernel instances on the various cores. There is currently no C6X bootloader support for device trees so we build in the DTB for now. There are some interesting twists to the hardware which are of note for device tree support. Each core has its own interrupt controller which is controlled by special purpose core registers. This core controller provides 12 general purpose prioritized interrupt sources. Each core is contained within a hardware "module" which provides L1 and L2 caches, power control, and another interrupt controller which cascades into the core interrupt controller. These core module functions are controlled by memory mapped registers. The addresses for these registers are the same for each core. That is, when coreN accesses a module-level MMIO register at a given address, it accesses the register for coreN even though other cores would use the same address to access the register in the module containing those cores. Other hardware modules (timers, enet, etc) which are memory mapped can be accessed by all cores. The timers need some further explanation for multicore SoCs. Even though all timer control registers are visible to all cores, interrupt routing or other considerations may make a given timer more suitable for use by a core than some other timer. Because of this and the desire to have the same image run on more than one core, the timer nodes have a "ti,core-mask" property which is used by the driver to scan for a suitable timer to use. Signed-off-by: Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* C6X: build infrastructureAurelien Jacquiot2011-10-062-0/+28
Original port to early 2.6 kernel using TI COFF toolchain. Brought up to date by Mark Salter <msalter@redhat.com> Signed-off-by: Aurelien Jacquiot <a-jacquiot@ti.com> Signed-off-by: Mark Salter <msalter@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
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