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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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263291fa44
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it was merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Acked-by: Sam Ravnborg <sam@ravnborg.org> Link: https://lore.kernel.org/all/20230718143211.1066810-1-robh@kernel.org/ Signed-off-by: Rob Herring <robh@kernel.org>
180 lines
4 KiB
C
180 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/export.h>
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#include <linux/mod_devicetable.h>
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#include <linux/errno.h>
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#include <linux/irq.h>
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#include <linux/of.h>
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#include <linux/of_platform.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 "of_device_common.h"
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unsigned int irq_of_parse_and_map(struct device_node *node, int index)
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{
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struct platform_device *op = of_find_device_by_node(node);
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if (!op || index >= op->archdata.num_irqs)
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return 0;
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return op->archdata.irqs[index];
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}
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EXPORT_SYMBOL(irq_of_parse_and_map);
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int of_address_to_resource(struct device_node *node, int index,
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struct resource *r)
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{
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struct platform_device *op = of_find_device_by_node(node);
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if (!op || index >= op->num_resources)
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return -EINVAL;
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memcpy(r, &op->archdata.resource[index], sizeof(*r));
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return 0;
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}
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EXPORT_SYMBOL_GPL(of_address_to_resource);
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void __iomem *of_iomap(struct device_node *node, int index)
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{
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struct platform_device *op = of_find_device_by_node(node);
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struct resource *r;
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if (!op || index >= op->num_resources)
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return NULL;
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r = &op->archdata.resource[index];
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return of_ioremap(r, 0, resource_size(r), (char *) r->name);
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}
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EXPORT_SYMBOL(of_iomap);
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/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
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* BUS and propagate to all child platform_device objects.
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*/
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void of_propagate_archdata(struct platform_device *bus)
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{
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struct dev_archdata *bus_sd = &bus->dev.archdata;
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struct device_node *bus_dp = bus->dev.of_node;
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struct device_node *dp;
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for (dp = bus_dp->child; dp; dp = dp->sibling) {
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struct platform_device *op = of_find_device_by_node(dp);
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op->dev.archdata.iommu = bus_sd->iommu;
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op->dev.archdata.stc = bus_sd->stc;
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op->dev.archdata.host_controller = bus_sd->host_controller;
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op->dev.archdata.numa_node = bus_sd->numa_node;
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op->dev.dma_ops = bus->dev.dma_ops;
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if (dp->child)
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of_propagate_archdata(op);
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}
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}
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static void get_cells(struct device_node *dp, int *addrc, int *sizec)
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{
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if (addrc)
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*addrc = of_n_addr_cells(dp);
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if (sizec)
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*sizec = of_n_size_cells(dp);
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}
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/*
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* Default translator (generic bus)
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*/
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void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
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{
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get_cells(dev, addrc, sizec);
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}
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/* Make sure the least significant 64-bits are in-range. Even
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* for 3 or 4 cell values it is a good enough approximation.
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*/
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int of_out_of_range(const u32 *addr, const u32 *base,
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const u32 *size, int na, int ns)
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{
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u64 a = of_read_addr(addr, na);
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u64 b = of_read_addr(base, na);
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if (a < b)
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return 1;
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b += of_read_addr(size, ns);
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if (a >= b)
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return 1;
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return 0;
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}
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int of_bus_default_map(u32 *addr, const u32 *range, int na, int ns, int pna)
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{
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u32 result[OF_MAX_ADDR_CELLS];
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int i;
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if (ns > 2) {
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printk("of_device: Cannot handle size cells (%d) > 2.", ns);
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return -EINVAL;
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}
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if (of_out_of_range(addr, range, range + na + pna, na, ns))
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return -EINVAL;
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/* Start with the parent range base. */
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memcpy(result, range + na, pna * 4);
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/* Add in the child address offset. */
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for (i = 0; i < na; i++)
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result[pna - 1 - i] +=
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(addr[na - 1 - i] -
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range[na - 1 - i]);
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memcpy(addr, result, pna * 4);
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return 0;
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}
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unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags)
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{
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if (flags)
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return flags;
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return IORESOURCE_MEM;
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}
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/*
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* SBUS bus specific translator
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*/
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int of_bus_sbus_match(struct device_node *np)
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{
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struct device_node *dp = np;
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while (dp) {
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if (of_node_name_eq(dp, "sbus") ||
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of_node_name_eq(dp, "sbi"))
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return 1;
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/* Have a look at use_1to1_mapping(). We're trying
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* to match SBUS if that's the top-level bus and we
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* don't have some intervening real bus that provides
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* ranges based translations.
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*/
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if (of_property_present(dp, "ranges"))
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break;
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dp = dp->parent;
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}
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return 0;
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}
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void of_bus_sbus_count_cells(struct device_node *child, int *addrc, int *sizec)
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{
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if (addrc)
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*addrc = 2;
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if (sizec)
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*sizec = 1;
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}
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