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path: root/drivers/irqchip/irq-renesas-irqc.c
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2021-06-10irqchip: Bulk conversion to generic_handle_domain_irq()Marc Zyngier1-1/+1
Wherever possible, replace constructs that match either generic_handle_irq(irq_find_mapping()) or generic_handle_irq(irq_linear_revmap()) to a single call to generic_handle_domain_irq(). Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com> Signed-off-by: Marc Zyngier <maz@kernel.org>
2019-06-11irqchip/renesas-irqc: Use proper irq_chip name and parentGeert Uytterhoeven1-1/+2
The irq_chip .name field should contain the device's class (not instance) name, while .parent_device should point to the device itself. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-05-29irqchip/renesas-irqc: Convert to managed initializationsGeert Uytterhoeven1-39/+15
Simplify error handling by converting the driver to use managed allocations and initializations. Note that platform_get_resource() and ioremap_nocache() are combined in devm_platform_ioremap_resource(). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-05-29irqchip/renesas-irqc: Replace irqc_priv.pdev by irqc_priv.devGeert Uytterhoeven1-4/+3
Nothing really uses irqc_priv.pdev, all users need irqc_priv.pdev->dev. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-05-29irqchip/renesas-irqc: Add helper variable dev = &pdev->devGeert Uytterhoeven1-13/+13
The probe function uses "&pdev->dev" a lot, hence add a shorthand for that. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-05-29irqchip/renesas-irqc: Remove error messages on out-of-memory conditionsGeert Uytterhoeven1-2/+0
There is no need to print error messages if kzalloc() or ioremap_nocache() fail, as the memory allocation core already takes care of that. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2019-05-29irqchip/renesas-irqc: Remove unneeded inclusion of <linux/spinlock.h>Geert Uytterhoeven1-1/+0
The driver never used spinlocks, and thus does not need to include <linux/spinlock.h>. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-12-13irqchip/irq-renesas-irqc: Convert to SPDX identifiersKuninori Morimoto1-13/+1
This patch updates license to use SPDX-License-Identifier instead of verbose license text. Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2018-03-14irqchip/renesas-irqc: Use wakeup_path i.s.o. explicit clock handlingGeert Uytterhoeven1-14/+16
Since commit 6f46aedb9c85873b ("irqchip: renesas-irqc: Add wake-up support"), when an IRQ is used for wakeup, the INTC block's module clock is manually kept running during system suspend, to make sure the device stays active. However, this explicit clock handling is merely a workaround for a failure to properly communicate wakeup information to the device core. Instead, set the device's power.wakeup_path field, to indicate this device is part of the wakeup path. Depending on the PM Domain's active_wakeup configuration, the genpd core code will keep the device enabled (and the clock running) during system suspend when needed. This allows for the removal of all explicit clock handling code from the driver. Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2015-09-29irqchip/renesas-irqc: Move over to nested generic chipMagnus Damm1-56/+30
Convert the IRQC driver to rely on GENERIC_IRQ_CHIP and set IRQ_GC_INIT_NESTED_LOCK to enable nested locking. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Cc: jason@lakedaemon.net Cc: geert+renesas@glider.be Cc: horms@verge.net.au Cc: Magnus Damm <magnus.damm@gmail.com> Link: http://lkml.kernel.org/r/20150928094237.32552.83434.sendpatchset@little-apple Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-15irqchip/renesas-irqc: Propagate wake-up settings to parentGeert Uytterhoeven1-0/+3
The renesas-irqc interrupt controller is cascaded to the GIC, but its driver doesn't propagate wake-up settings to the parent interrupt controller. Since commit aec89ef72ba6c944 ("irqchip/gic: Enable SKIP_SET_WAKE and MASK_ON_SUSPEND"), the GIC driver masks interrupts during suspend, and wake-up through gpio-keys now fails on r8a73a4/ape6evm. Fix this by propagating wake-up settings to the parent interrupt controller. There's no need to handle irq_set_irq_wake() failures, as the renesas-irqc interrupt controller is always cascaded to a GIC, and the GIC driver always sets SKIP_SET_WAKE since the aforementioned commit. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Sudeep Holla <sudeep.holla@arm.com> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Marc Zyngier <marc.zyngier@arm.com> Link: http://lkml.kernel.org/r/1441731636-17610-3-git-send-email-geert%2Brenesas@glider.be Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-09-15irqchip/renesas-irqc: Use a separate lockdep classGeert Uytterhoeven1-0/+7
The renesas-irqc interrupt controller is cascaded to the GIC. Hence when propagating wake-up settings to its parent interrupt controller, the following lockdep warning is printed: ============================================= [ INFO: possible recursive locking detected ] 4.2.0-ape6evm-10725-g50fcd7643c034198 #280 Not tainted --------------------------------------------- s2ram/1072 is trying to acquire lock: (&irq_desc_lock_class){-.-...}, at: [<c008d3fc>] __irq_get_desc_lock+0x58/0x98 but task is already holding lock: (&irq_desc_lock_class){-.-...}, at: [<c008d3fc>] __irq_get_desc_lock+0x58/0x98 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&irq_desc_lock_class); lock(&irq_desc_lock_class); *** DEADLOCK *** May be due to missing lock nesting notation 6 locks held by s2ram/1072: #0: (sb_writers#7){.+.+.+}, at: [<c012eb14>] __sb_start_write+0xa0/0xa8 #1: (&of->mutex){+.+.+.}, at: [<c019396c>] kernfs_fop_write+0x4c/0x1bc #2: (s_active#24){.+.+.+}, at: [<c0193974>] kernfs_fop_write+0x54/0x1bc #3: (pm_mutex){+.+.+.}, at: [<c008213c>] pm_suspend+0x10c/0x510 #4: (&dev->mutex){......}, at: [<c02af3c4>] __device_suspend+0xdc/0x2cc #5: (&irq_desc_lock_class){-.-...}, at: [<c008d3fc>] __irq_get_desc_lock+0x58/0x98 stack backtrace: CPU: 0 PID: 1072 Comm: s2ram Not tainted 4.2.0-ape6evm-10725-g50fcd7643c034198 #280 Hardware name: Generic R8A73A4 (Flattened Device Tree) [<c0018078>] (unwind_backtrace) from [<c00144f0>] (show_stack+0x10/0x14) [<c00144f0>] (show_stack) from [<c0451f14>] (dump_stack+0x88/0x98) [<c0451f14>] (dump_stack) from [<c007b29c>] (__lock_acquire+0x15cc/0x20e4) [<c007b29c>] (__lock_acquire) from [<c007c6e0>] (lock_acquire+0xac/0x12c) [<c007c6e0>] (lock_acquire) from [<c0457c00>] (_raw_spin_lock_irqsave+0x40/0x54) [<c0457c00>] (_raw_spin_lock_irqsave) from [<c008d3fc>] (__irq_get_desc_lock+0x58/0x98) [<c008d3fc>] (__irq_get_desc_lock) from [<c008ebbc>] (irq_set_irq_wake+0x20/0xf8) [<c008ebbc>] (irq_set_irq_wake) from [<c0260770>] (irqc_irq_set_wake+0x20/0x4c) [<c0260770>] (irqc_irq_set_wake) from [<c008ec28>] (irq_set_irq_wake+0x8c/0xf8) [<c008ec28>] (irq_set_irq_wake) from [<c02cb8c0>] (gpio_keys_suspend+0x74/0xc0) [<c02cb8c0>] (gpio_keys_suspend) from [<c02ae8cc>] (dpm_run_callback+0x54/0x124) Avoid this false positive by using a separate lockdep class for IRQC interrupts. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1441798974-25716-2-git-send-email-geert%2Brenesas@glider.be Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-20irqchip/renesas-irqc: Make use of irq_find_mapping()Magnus Damm1-7/+4
Instead of locally caching the virq as domain_irq simply rely on the IRQ domain code and irq_find_mapping(). This reduces the delta between the IRQC driver and the generic chip implementation. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Cc: jason@lakedaemon.net Cc: geert+renesas@glider.be Cc: horms@verge.net.au Cc: Magnus Damm <magnus.damm@gmail.com> Link: http://lkml.kernel.org/r/20150720100635.2552.20906.sendpatchset@little-apple Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-20irqchip/renesas-irqc: Use linear IRQ domainMagnus Damm1-2/+2
Use linear IRQ domain instead of irq_domain_add_simple() that also handles non-DT cases. This reduces the delta between the IRQC code and the generic chip implementation. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Cc: jason@lakedaemon.net Cc: geert+renesas@glider.be Cc: horms@verge.net.au Cc: Magnus Damm <magnus.damm@gmail.com> Link: http://lkml.kernel.org/r/20150720100625.2552.63939.sendpatchset@little-apple Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-07-20irqchip/renesas-irqc: Get rid of IRQF_VALIDMagnus Damm1-1/+0
IRQF_VALID is not needed on ARM anymore, so get rid of it. Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Cc: jason@lakedaemon.net Cc: geert+renesas@glider.be Cc: horms@verge.net.au Cc: Magnus Damm <magnus.damm@gmail.com> Link: http://lkml.kernel.org/r/20150720100614.2552.86867.sendpatchset@little-apple Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-05-05irqchip: irqc: Remove platform data supportGeert Uytterhoeven1-16/+1
As of commit 914d7d148411997c ("ARM: shmobile: r8a73a4: Remove legacy code"), the Renesas R-Mobile/R-Car interrupt controller is used with DT only, and interrupt numbers are thus always assigned automatically. Drop the platform data declaration and all related support code. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Link: http://lkml.kernel.org/r/1430216270-31929-1-git-send-email-geert%2Brenesas@glider.be Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-05-05irqchip: Constify irq_domain_opsKrzysztof Kozlowski1-1/+1
The irq_domain_ops are not modified by the driver and the irqdomain core code accepts pointer to a const data. Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k@gmail.com> Cc: Jason Cooper <jason@lakedaemon.net> Cc: Kukjin Kim <kgene@kernel.org> Cc: Stephen Warren <swarren@wwwdotorg.org> Cc: Lee Jones <lee@kernel.org> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-rpi-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Link: http://lkml.kernel.org/r/1430139264-4362-2-git-send-email-k.kozlowski.k@gmail.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-04-03Merge branch 'irqchip/renesas' into irqchip/coreJason Cooper1-6/+48
2015-04-03irqchip: renesas-irqc: Add wake-up supportGeert Uytterhoeven1-1/+25
The IRQC module clock is managed through Runtime PM and PM Domains. If wake-up is enabled, this clock must not be disabled during system suspend. Hence implement irq_chip.irq_set_wake(), which increments/decrements the clock's enable_count when needed. This fixes wake-up by gpio-keys on r8a73a4/ape6evm. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Link: https://lkml.kernel.org/r/1427889606-18671-1-git-send-email-geert+renesas@glider.be Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-23irqchip: renesas-irqc: Add minimal runtime PM supportGeert Uytterhoeven1-0/+8
This is just enough to let pm_clk_*() enable the functional clock, and manage it for suspend/resume, if present. Before, it was assumed enabled by the bootloader or reset state. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Link: https://lkml.kernel.org/r/1426704961-27322-3-git-send-email-geert+renesas@glider.be Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-23irqchip: renesas-irqc: Add more register documentationGeert Uytterhoeven1-5/+15
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Link: https://lkml.kernel.org/r/1426704961-27322-2-git-send-email-geert+renesas@glider.be Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2015-03-03irqchip: renesas-irqc: Use u32 to store 32-bit register valuesGeert Uytterhoeven1-2/+2
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lkml.kernel.org/r/1424947412-8061-1-git-send-email-geert+renesas@glider.be Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-10-20irqchip: drop owner assignment from platform_driversWolfram Sang1-1/+0
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-12-23irq-renesas-irqc: simplify irq_set_type() methodSergei Shtylyov1-10/+7
Value 0 of the sense selection field of CONFIG_n register means "disable event detection" and serves in irqc_sense[] for marking the invalid values of the IRQ type (by just omitting initializers). There is no need for INTC_IRQ_SENSE_VALID and hence INTC_IRQ_SENSE() as all field values matching to the valid IRQ types are non-zero anyway. Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-12-12irqchip: renesas-irqc: Enable mask on suspendMagnus Damm1-1/+1
Now when lazy interrupt disable has been enabled in the driver then extend the code to set IRQCHIP_MASK_ON_SUSPEND which tells the core that only IRQs marked as wakeups need to stay enabled during Suspend-to-RAM. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-12-12irqchip: renesas-irqc: Use lazy disableMagnus Damm1-2/+0
Set the ->irq_enable() and ->irq_disable() methods to NULL to enable lazy disable of interrupts. This by itself provides some level of optimization, but is mainly enabled as ground work for future Suspend-to-RAM wake up support. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-06-06irqchip: renesas-irqc: Fix irqc_probe error handlingAxel Lin1-2/+2
The code in goto err3 path is wrong because it will call fee_irq() with k == 0, which means it does free_irq(p->irq[-1].requested_irq, &p->irq[-1]); Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-18irqchip: irqc: Add DT supportMagnus Damm1-0/+9
Add DT support to the IRQC External IRQ Pin driver. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2013-03-18irqchip: Renesas IRQC driverMagnus Damm1-0/+298
This patch adds a driver for external IRQ pins connected to the IRQC hardware block on recent SoCs from Renesas. The IRQC hardware block is used together with more recent ARM based SoCs using the GIC. As usual the GIC requires external IRQ trigger setup somewhere else which in this particular case happens to be IRQC. This driver implements the glue code needed to configure IRQ trigger and also handle mask/unmask and demux of external IRQ pins hooked up from the IRQC to the GIC. Tested on r8a73a4 but is designed to work with a wide range of SoCs. The driver requires one GIC SPI per external IRQ pin to operate. Each driver instance will handle up to 32 external IRQ pins. The SoCs using this driver are currently mainly used together with regular platform devices so this driver allows configuration via platform data to support things like static interrupt base address. DT support will be added incrementally in the not so distant future. Signed-off-by: Magnus Damm <damm@opensource.se> Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
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