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https://github.com/torvalds/linux.git
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7b4baa39de
Merge EC, AC, fan and backlight driver changes and ACPI AMBA support update for 6.1-rc1: - Drop unneeded result variable from ec_write() (ye xingchen). - Remove the leftover struct acpi_ac_bl from the ACPI AC driver (Hanjun Guo). - Reorder symbols to get rid of a few forward declarations in the ACPI fan driver (Uwe Kleine-König). - Add Toshiba Satellite/Portege Z830 ACPI backlight quirk (Arvid Norlander). - Add ARM DMA-330 controller to the supported list in the ACPI AMBA driver (Vijayenthiran Subramaniam). * acpi-ec: ACPI: EC: Drop unneeded result variable from ec_write() * acpi-ac: ACPI: AC: Remove the leftover struct acpi_ac_bl * acpi-fan: ACPI: fan: Reorder symbols to get rid of a few forward declarations * acpi-video: ACPI: video: Add Toshiba Satellite/Portege Z830 quirk * acpi-amba: ACPI: AMBA: Add ARM DMA-330 controller to the supported list
131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ACPI support for platform bus type.
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*
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* Copyright (C) 2015, Linaro Ltd
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* Author: Graeme Gregory <graeme.gregory@linaro.org>
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*/
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#include <linux/acpi.h>
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#include <linux/amba/bus.h>
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#include <linux/clkdev.h>
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#include <linux/clk-provider.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/ioport.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "internal.h"
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static const struct acpi_device_id amba_id_list[] = {
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{"ARMH0061", 0}, /* PL061 GPIO Device */
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{"ARMH0330", 0}, /* ARM DMA Controller DMA-330 */
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{"ARMHC500", 0}, /* ARM CoreSight ETM4x */
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{"ARMHC501", 0}, /* ARM CoreSight ETR */
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{"ARMHC502", 0}, /* ARM CoreSight STM */
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{"ARMHC503", 0}, /* ARM CoreSight Debug */
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{"ARMHC979", 0}, /* ARM CoreSight TPIU */
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{"ARMHC97C", 0}, /* ARM CoreSight SoC-400 TMC, SoC-600 ETF/ETB */
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{"ARMHC98D", 0}, /* ARM CoreSight Dynamic Replicator */
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{"ARMHC9CA", 0}, /* ARM CoreSight CATU */
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{"ARMHC9FF", 0}, /* ARM CoreSight Dynamic Funnel */
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{"", 0},
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};
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static void amba_register_dummy_clk(void)
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{
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static struct clk *amba_dummy_clk;
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/* If clock already registered */
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if (amba_dummy_clk)
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return;
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amba_dummy_clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 0);
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clk_register_clkdev(amba_dummy_clk, "apb_pclk", NULL);
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}
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static int amba_handler_attach(struct acpi_device *adev,
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const struct acpi_device_id *id)
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{
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struct acpi_device *parent = acpi_dev_parent(adev);
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struct amba_device *dev;
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struct resource_entry *rentry;
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struct list_head resource_list;
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bool address_found = false;
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int irq_no = 0;
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int ret;
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/* If the ACPI node already has a physical device attached, skip it. */
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if (adev->physical_node_count)
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return 0;
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dev = amba_device_alloc(dev_name(&adev->dev), 0, 0);
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if (!dev) {
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dev_err(&adev->dev, "%s(): amba_device_alloc() failed\n",
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__func__);
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return -ENOMEM;
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}
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INIT_LIST_HEAD(&resource_list);
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ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
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if (ret < 0)
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goto err_free;
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list_for_each_entry(rentry, &resource_list, node) {
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switch (resource_type(rentry->res)) {
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case IORESOURCE_MEM:
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if (!address_found) {
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dev->res = *rentry->res;
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dev->res.name = dev_name(&dev->dev);
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address_found = true;
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}
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break;
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case IORESOURCE_IRQ:
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if (irq_no < AMBA_NR_IRQS)
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dev->irq[irq_no++] = rentry->res->start;
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break;
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default:
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dev_warn(&adev->dev, "Invalid resource\n");
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break;
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}
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}
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acpi_dev_free_resource_list(&resource_list);
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/*
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* If the ACPI node has a parent and that parent has a physical device
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* attached to it, that physical device should be the parent of
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* the amba device we are about to create.
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*/
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if (parent)
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dev->dev.parent = acpi_get_first_physical_node(parent);
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ACPI_COMPANION_SET(&dev->dev, adev);
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ret = amba_device_add(dev, &iomem_resource);
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if (ret) {
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dev_err(&adev->dev, "%s(): amba_device_add() failed (%d)\n",
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__func__, ret);
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goto err_free;
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}
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return 1;
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err_free:
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amba_device_put(dev);
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return ret;
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}
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static struct acpi_scan_handler amba_handler = {
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.ids = amba_id_list,
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.attach = amba_handler_attach,
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};
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void __init acpi_amba_init(void)
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{
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amba_register_dummy_clk();
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acpi_scan_add_handler(&amba_handler);
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}
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