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powerpc: fsl_rio: Use of_range_to_resource() for "ranges" parsing

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"ranges" is a standard property with common parsing functions. Users
shouldn't be implementing their own parsing of it. Refactor the FSL RapidIO
"ranges" parsing to use of_range_to_resource() instead.

One change is the original code would look for "#size-cells" and
"#address-cells" in the parent node if not found in the port child
nodes. That is non-standard behavior and not necessary AFAICT. In 2011
in commit 54986964c13c ("powerpc/85xx: Update SRIO device tree nodes")
there was an ABI break. The upstream .dts files have been correct since
at least that point.

Signed-off-by: Rob Herring <robh@kernel.org>
[mpe: Remove now unused "cell" variable]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230609183244.1767325-1-robh@kernel.org

"ranges" is a standard property with common parsing functions. Users
shouldn't be implementing their own parsing of it. Refactor the FSL RapidIO
"ranges" parsing to use of_range_to_resource() instead.

One change is the original code would look for "#size-cells" and
"#address-cells" in the parent node if not found in the port child
nodes. That is non-standard behavior and not necessary AFAICT. In 2011
in commit 54986964c13c ("powerpc/85xx: Update SRIO device tree nodes")
there was an ABI break. The upstream .dts files have been correct since
at least that point.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230609183244.1767325-1-robh@kernel.org
This commit is contained in:
Rob Herring 2023-06-09 12:32:44 -06:00 committed by Michael Ellerman
parent 6f3bdbbeaf
commit c4ae1799a5
1 changed files with 9 additions and 27 deletions
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36
arch/powerpc/sysdev/fsl_rio.c
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@ -448,13 +448,13 @@ int fsl_rio_setup(struct platform_device *dev)
struct rio_mport *port;
struct rio_priv *priv;
int rc = 0;
const u32 *dt_range, *cell, *port_index;
const u32 *dt_range, *port_index;
u32 active_ports = 0;
struct device_node *np, *rmu_node;
int rlen;
u32 ccsr;
u64 range_start, range_size;
int paw, aw, sw;
u64 range_start;
int aw;
u32 i;
static int tmp;
struct device_node *rmu_np[MAX_MSG_UNIT_NUM] = {NULL};
@ -569,6 +569,8 @@ int fsl_rio_setup(struct platform_device *dev)
/*set up ports node*/
for_each_child_of_node(dev->dev.of_node, np) {
struct resource res;
port_index = of_get_property(np, "cell-index", NULL);
if (!port_index) {
dev_err(&dev->dev, "Can't get %pOF property 'cell-index'\n",
@ -576,32 +578,14 @@ int fsl_rio_setup(struct platform_device *dev)
continue;
}
dt_range = of_get_property(np, "ranges", &rlen);
if (!dt_range) {
if (of_range_to_resource(np, 0, &res)) {
dev_err(&dev->dev, "Can't get %pOF property 'ranges'\n",
np);
continue;
}
/* Get node address wide */
cell = of_get_property(np, "#address-cells", NULL);
if (cell)
aw = *cell;
else
aw = of_n_addr_cells(np);
/* Get node size wide */
cell = of_get_property(np, "#size-cells", NULL);
if (cell)
sw = *cell;
else
sw = of_n_size_cells(np);
/* Get parent address wide wide */
paw = of_n_addr_cells(np);
range_start = of_read_number(dt_range + aw, paw);
range_size = of_read_number(dt_range + aw + paw, sw);
dev_info(&dev->dev, "%pOF: LAW start 0x%016llx, size 0x%016llx.\n",
np, range_start, range_size);
dev_info(&dev->dev, "%pOF: LAW %pR\n",
np, &res);
port = kzalloc(sizeof(struct rio_mport), GFP_KERNEL);
if (!port)
@ -624,9 +608,7 @@ int fsl_rio_setup(struct platform_device *dev)
}
INIT_LIST_HEAD(&port->dbells);
port->iores.start = range_start;
port->iores.end = port->iores.start + range_size - 1;
port->iores.flags = IORESOURCE_MEM;
port->iores = res; /* struct copy */
port->iores.name = "rio_io_win";
if (request_resource(&iomem_resource, &port->iores) < 0) {