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| author | Anand Ashok Dumbre <anand.ashok.dumbre@xilinx.com> | 2021-12-03 22:23:54 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-12-21 16:10:09 +0100 |
| commit | eca6e2d4a4a4b824f055eeaaa24f1c2327fb91a2 (patch) | |
| tree | 122baff131b0e0f2e99dda51ff81473192d06d1f /drivers/base | |
| parent | iio:accel:kxcjk-1013: Mark struct __maybe_unused to avoid warning. (diff) | |
| download | linux-eca6e2d4a4a4b824f055eeaaa24f1c2327fb91a2.tar.xz linux-eca6e2d4a4a4b824f055eeaaa24f1c2327fb91a2.zip | |
device property: Add fwnode_iomap()
This patch introduces a new helper routine - fwnode_iomap(), which
allows to map the memory mapped IO for a given device node.
This implementation does not cover the ACPI case and may be expanded
in the future. The main purpose here is to be able to develop resource
provider agnostic drivers.
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Anand Ashok Dumbre <anand.ashok.dumbre@xilinx.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20211203212358.31444-2-anand.ashok.dumbre@xilinx.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/property.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/base/property.c b/drivers/base/property.c index f1f35b48ab8b..ed4470410030 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -959,6 +959,22 @@ int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index) EXPORT_SYMBOL(fwnode_irq_get); /** + * fwnode_iomap - Maps the memory mapped IO for a given fwnode + * @fwnode: Pointer to the firmware node + * @index: Index of the IO range + * + * Returns a pointer to the mapped memory. + */ +void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index) +{ + if (IS_ENABLED(CONFIG_OF_ADDRESS) && is_of_node(fwnode)) + return of_iomap(to_of_node(fwnode), index); + + return NULL; +} +EXPORT_SYMBOL(fwnode_iomap); + +/** * fwnode_graph_get_next_endpoint - Get next endpoint firmware node * @fwnode: Pointer to the parent firmware node * @prev: Previous endpoint node or %NULL to get the first |