// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2014 Magnus Damm
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* Copyright (C) 2015 Glider bvba
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*/
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#define pr_fmt(fmt) "board_staging: " fmt
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#include <linux/clkdev.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/device.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_irq.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include "board.h"
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static struct device_node *irqc_node __initdata;
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static unsigned int irqc_base __initdata;
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static bool find_by_address(u64 base_address)
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{
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struct device_node *dn = of_find_all_nodes(NULL);
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struct resource res;
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while (dn) {
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if (!of_address_to_resource(dn, 0, &res)) {
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if (res.start == base_address) {
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of_node_put(dn);
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return true;
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}
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}
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dn = of_find_all_nodes(dn);
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}
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return false;
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}
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bool __init board_staging_dt_node_available(const struct resource *resource,
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unsigned int num_resources)
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{
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unsigned int i;
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for (i = 0; i < num_resources; i++) {
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const struct resource *r = resource + i;
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if (resource_type(r) == IORESOURCE_MEM)
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if (find_by_address(r->start))
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return true; /* DT node available */
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}
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return false; /* Nothing found */
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}
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int __init board_staging_gic_setup_xlate(const char *gic_match,
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unsigned int base)
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{
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WARN_ON(irqc_node);
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irqc_node = of_find_compatible_node(NULL, NULL, gic_match);
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WARN_ON(!irqc_node);
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if (!irqc_node)
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return -ENOENT;
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irqc_base = base;
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return 0;
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}
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static void __init gic_fixup_resource(struct resource *res)
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{
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struct of_phandle_args irq_data;
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unsigned int hwirq = res->start;
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unsigned int virq;
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if (resource_type(res) != IORESOURCE_IRQ || !irqc_node)
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return;
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irq_data.np = irqc_node;
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irq_data.args_count = 3;
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irq_data.args[0] = 0;
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irq_data.args[1] = hwirq - irqc_base;
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switch (res->flags &
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(IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE |
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IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL)) {
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case IORESOURCE_IRQ_LOWEDGE:
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irq_data.args[2] = IRQ_TYPE_EDGE_FALLING;
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break;
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case IORESOURCE_IRQ_HIGHEDGE:
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irq_data.args[2] = IRQ_TYPE_EDGE_RISING;
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break;
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case IORESOURCE_IRQ_LOWLEVEL:
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irq_data.args[2] = IRQ_TYPE_LEVEL_LOW;
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break;
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case IORESOURCE_IRQ_HIGHLEVEL:
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default:
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irq_data.args[2] = IRQ_TYPE_LEVEL_HIGH;
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break;
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}
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virq = irq_create_of_mapping(&irq_data);
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if (WARN_ON(!virq))
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return;
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pr_debug("hwirq %u -> virq %u\n", hwirq, virq);
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res->start = virq;
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}
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void __init board_staging_gic_fixup_resources(struct resource *res,
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unsigned int nres)
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{
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unsigned int i;
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for (i = 0; i < nres; i++)
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gic_fixup_resource(&res[i]);
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}
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int __init board_staging_register_clock(const struct board_staging_clk *bsc)
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{
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int error;
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pr_debug("Aliasing clock %s for con_id %s dev_id %s\n", bsc->clk,
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bsc->con_id, bsc->dev_id);
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error = clk_add_alias(bsc->con_id, bsc->dev_id, bsc->clk, NULL);
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if (error)
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pr_err("Failed to alias clock %s (%d)\n", bsc->clk, error);
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return error;
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}
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#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
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static int board_staging_add_dev_domain(struct platform_device *pdev,
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const char *domain)
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{
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struct device *dev = &pdev->dev;
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struct of_phandle_args pd_args;
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struct device_node *np;
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np = of_find_node_by_path(domain);
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if (!np) {
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pr_err("Cannot find domain node %s\n", domain);
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return -ENOENT;
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}
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pd_args.np = np;
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pd_args.args_count = 0;
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/* Initialization similar to device_pm_init_common() */
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spin_lock_init(&dev->power.lock);
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dev->power.early_init = true;
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return of_genpd_add_device(&pd_args, dev);
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}
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#else
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static inline int board_staging_add_dev_domain(struct platform_device *pdev,
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const char *domain)
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{
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return 0;
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}
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#endif
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int __init board_staging_register_device(const struct board_staging_dev *dev)
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{
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struct platform_device *pdev = dev->pdev;
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unsigned int i;
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int error;
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pr_debug("Trying to register device %s\n", pdev->name);
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if (board_staging_dt_node_available(pdev->resource,
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pdev->num_resources)) {
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pr_warn("Skipping %s, already in DT\n", pdev->name);
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return -EEXIST;
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}
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board_staging_gic_fixup_resources(pdev->resource, pdev->num_resources);
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for (i = 0; i < dev->nclocks; i++)
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board_staging_register_clock(&dev->clocks[i]);
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if (dev->domain)
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board_staging_add_dev_domain(pdev, dev->domain);
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error = platform_device_register(pdev);
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if (error) {
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pr_err("Failed to register device %s (%d)\n", pdev->name,
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error);
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return error;
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}
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return error;
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}
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void __init board_staging_register_devices(const struct board_staging_dev *devs,
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unsigned int ndevs)
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{
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unsigned int i;
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for (i = 0; i < ndevs; i++)
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board_staging_register_device(&devs[i]);
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}
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