From cf9610f9116d55c5a66ef9f1faecacabd93a9322 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 24 Aug 2026 08:46:03 -0700 Subject: Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ... --- drivers/acpi/evged.c | 195 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 drivers/acpi/evged.c (limited to 'drivers/acpi/evged.c') diff --git a/drivers/acpi/evged.c b/drivers/acpi/evged.c new file mode 100644 index 000000000..5c35cbc7f --- /dev/null +++ b/drivers/acpi/evged.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Generic Event Device for ACPI. + * + * Copyright (c) 2016, The Linux Foundation. All rights reserved. + * + * Generic Event Device allows platforms to handle interrupts in ACPI + * ASL statements. It follows very similar to _EVT method approach + * from GPIO events. All interrupts are listed in _CRS and the handler + * is written in _EVT method. Here is an example. + * + * Device (GED0) + * { + * + * Name (_HID, "ACPI0013") + * Name (_UID, 0) + * Method (_CRS, 0x0, Serialized) + * { + * Name (RBUF, ResourceTemplate () + * { + * Interrupt(ResourceConsumer, Edge, ActiveHigh, Shared, , , ) + * {123} + * } + * }) + * + * Method (_EVT, 1) { + * if (Lequal(123, Arg0)) + * { + * } + * } + * } + */ + +#include +#include +#include +#include +#include +#include + +#define MODULE_NAME "acpi-ged" + +struct acpi_ged_device { + struct device *dev; + struct list_head event_list; +}; + +struct acpi_ged_event { + struct list_head node; + struct device *dev; + unsigned int gsi; + unsigned int irq; + acpi_handle handle; +}; + +static irqreturn_t acpi_ged_irq_handler(int irq, void *data) +{ + struct acpi_ged_event *event = data; + acpi_status acpi_ret; + + acpi_ret = acpi_execute_simple_method(event->handle, NULL, event->gsi); + if (ACPI_FAILURE(acpi_ret)) + dev_err_once(event->dev, "IRQ method execution failed\n"); + + return IRQ_HANDLED; +} + +static acpi_status acpi_ged_request_interrupt(struct acpi_resource *ares, + void *context) +{ + struct acpi_ged_event *event; + unsigned int irq; + unsigned int gsi; + unsigned int irqflags = IRQF_ONESHOT; + struct acpi_ged_device *geddev = context; + struct device *dev = geddev->dev; + acpi_handle handle = ACPI_HANDLE(dev); + acpi_handle evt_handle; + struct resource r; + struct acpi_resource_irq *p = &ares->data.irq; + struct acpi_resource_extended_irq *pext = &ares->data.extended_irq; + char ev_name[5]; + u8 trigger; + + if (ares->type == ACPI_RESOURCE_TYPE_END_TAG) + return AE_OK; + + if (!acpi_dev_resource_interrupt(ares, 0, &r)) { + dev_err(dev, "unable to parse IRQ resource\n"); + return AE_ERROR; + } + if (ares->type == ACPI_RESOURCE_TYPE_IRQ) { + gsi = p->interrupts[0]; + trigger = p->triggering; + } else { + gsi = pext->interrupts[0]; + trigger = pext->triggering; + } + + irq = r.start; + + switch (gsi) { + case 0 ... 255: + sprintf(ev_name, "_%c%02X", + trigger == ACPI_EDGE_SENSITIVE ? 'E' : 'L', gsi); + + if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle))) + break; + fallthrough; + default: + if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle))) + break; + + dev_err(dev, "cannot locate _EVT method\n"); + return AE_ERROR; + } + + event = devm_kzalloc(dev, sizeof(*event), GFP_KERNEL); + if (!event) + return AE_ERROR; + + event->gsi = gsi; + event->dev = dev; + event->irq = irq; + event->handle = evt_handle; + + if (r.flags & IORESOURCE_IRQ_SHAREABLE) + irqflags |= IRQF_SHARED; + + if (request_threaded_irq(irq, NULL, acpi_ged_irq_handler, + irqflags, "ACPI:Ged", event)) { + dev_err(dev, "failed to setup event handler for irq %u\n", irq); + return AE_ERROR; + } + + dev_dbg(dev, "GED listening GSI %u @ IRQ %u\n", gsi, irq); + list_add_tail(&event->node, &geddev->event_list); + return AE_OK; +} + +static int ged_probe(struct platform_device *pdev) +{ + struct acpi_ged_device *geddev; + acpi_status acpi_ret; + + geddev = devm_kzalloc(&pdev->dev, sizeof(*geddev), GFP_KERNEL); + if (!geddev) + return -ENOMEM; + + geddev->dev = &pdev->dev; + INIT_LIST_HEAD(&geddev->event_list); + acpi_ret = acpi_walk_resources(ACPI_HANDLE(&pdev->dev), "_CRS", + acpi_ged_request_interrupt, geddev); + if (ACPI_FAILURE(acpi_ret)) { + dev_err(&pdev->dev, "unable to parse the _CRS record\n"); + return -EINVAL; + } + platform_set_drvdata(pdev, geddev); + + return 0; +} + +static void ged_shutdown(struct platform_device *pdev) +{ + struct acpi_ged_device *geddev = platform_get_drvdata(pdev); + struct acpi_ged_event *event, *next; + + list_for_each_entry_safe(event, next, &geddev->event_list, node) { + free_irq(event->irq, event); + list_del(&event->node); + dev_dbg(geddev->dev, "GED releasing GSI %u @ IRQ %u\n", + event->gsi, event->irq); + } +} + +static void ged_remove(struct platform_device *pdev) +{ + ged_shutdown(pdev); +} + +static const struct acpi_device_id ged_acpi_ids[] = { + {"ACPI0013"}, + {}, +}; + +static struct platform_driver ged_driver = { + .probe = ged_probe, + .remove = ged_remove, + .shutdown = ged_shutdown, + .driver = { + .name = MODULE_NAME, + .acpi_match_table = ACPI_PTR(ged_acpi_ids), + }, +}; +builtin_platform_driver(ged_driver); -- cgit v1.3.1