Messages in this thread Patch in this message | | | Date | Sun, 23 Feb 2020 18:08:14 -0800 | Subject | [PATCH v2 2/3] libnvdimm/of_pmem: handle memory-region in DT | From | Alistair Delva <> |
| |
From: Kenny Root <kroot@google.com>
From: Kenny Root <kroot@google.com>
Add support for parsing the 'memory-region' DT property in addition to the 'reg' DT property. This enables use cases where the pmem region is not in I/O address space or dedicated memory (e.g. a bootloader carveout).
Signed-off-by: Kenny Root <kroot@google.com> Signed-off-by: Alistair Delva <adelva@google.com> Reviewed-by: "Oliver O'Halloran" <oohall@gmail.com> Cc: Rob Herring <robh+dt@kernel.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: devicetree@vger.kernel.org Cc: linux-nvdimm@lists.01.org Cc: kernel-team@android.com --- drivers/nvdimm/of_pmem.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c index fdf54494e8c9..cff47cc5fc4a 100644 --- a/drivers/nvdimm/of_pmem.c +++ b/drivers/nvdimm/of_pmem.c @@ -49,11 +49,12 @@ static void of_pmem_register_region(struct platform_device *pdev, static int of_pmem_region_probe(struct platform_device *pdev) { + struct device_node *mr_np, *np; struct of_pmem_private *priv; - struct device_node *np; struct nvdimm_bus *bus; + struct resource res; bool is_volatile; - int i; + int i, ret; np = dev_of_node(&pdev->dev); if (!np) @@ -83,6 +84,21 @@ static int of_pmem_region_probe(struct platform_device *pdev) is_volatile); } + i = 0; + while ((mr_np = of_parse_phandle(np, "memory-region", i++))) { + ret = of_address_to_resource(mr_np, 0, &res); + if (ret) { + dev_warn( + &pdev->dev, + "Unable to acquire memory-region from %pOF: %d\n", + mr_np, ret); + } else { + of_pmem_register_region(pdev, bus, np, &res, + is_volatile); + } + of_node_put(mr_np); + } + return 0; } -- 2.25.0.265.gbab2e86ba0-goog
| |