^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * ACPI support for platform bus type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2015, Linaro Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Graeme Gregory <graeme.gregory@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/amba/bus.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/clkdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/clk-provider.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static const struct acpi_device_id amba_id_list[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) {"ARMH0061", 0}, /* PL061 GPIO Device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {"ARMHC500", 0}, /* ARM CoreSight ETM4x */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {"ARMHC501", 0}, /* ARM CoreSight ETR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {"ARMHC502", 0}, /* ARM CoreSight STM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) {"ARMHC503", 0}, /* ARM CoreSight Debug */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {"ARMHC979", 0}, /* ARM CoreSight TPIU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {"ARMHC97C", 0}, /* ARM CoreSight SoC-400 TMC, SoC-600 ETF/ETB */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {"ARMHC98D", 0}, /* ARM CoreSight Dynamic Replicator */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {"ARMHC9CA", 0}, /* ARM CoreSight CATU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) {"ARMHC9FF", 0}, /* ARM CoreSight Dynamic Funnel */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) {"", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static void amba_register_dummy_clk(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static struct clk *amba_dummy_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) /* If clock already registered */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) if (amba_dummy_clk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) amba_dummy_clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) clk_register_clkdev(amba_dummy_clk, "apb_pclk", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int amba_handler_attach(struct acpi_device *adev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) const struct acpi_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct amba_device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) struct resource_entry *rentry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct list_head resource_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) bool address_found = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int irq_no = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /* If the ACPI node already has a physical device attached, skip it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (adev->physical_node_count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) dev = amba_device_alloc(dev_name(&adev->dev), 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (!dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) dev_err(&adev->dev, "%s(): amba_device_alloc() failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) INIT_LIST_HEAD(&resource_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) list_for_each_entry(rentry, &resource_list, node) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) switch (resource_type(rentry->res)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) case IORESOURCE_MEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (!address_found) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) dev->res = *rentry->res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) dev->res.name = dev_name(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) address_found = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) case IORESOURCE_IRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (irq_no < AMBA_NR_IRQS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) dev->irq[irq_no++] = rentry->res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) dev_warn(&adev->dev, "Invalid resource\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) acpi_dev_free_resource_list(&resource_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * If the ACPI node has a parent and that parent has a physical device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) * attached to it, that physical device should be the parent of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) * the amba device we are about to create.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (adev->parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) dev->dev.parent = acpi_get_first_physical_node(adev->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ACPI_COMPANION_SET(&dev->dev, adev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) ret = amba_device_add(dev, &iomem_resource);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) dev_err(&adev->dev, "%s(): amba_device_add() failed (%d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) __func__, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) goto err_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) err_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) amba_device_put(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static struct acpi_scan_handler amba_handler = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .ids = amba_id_list,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) .attach = amba_handler_attach,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) void __init acpi_amba_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) amba_register_dummy_clk();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) acpi_scan_add_handler(&amba_handler);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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