[PATCH] dm: core: Add address translation in fdt_get_resource
Patrick Delaunay
patrick.delaunay at foss.st.com
Tue Apr 6 09:38:06 CEST 2021
Today of_address_to_resource() is called only in
ofnode_read_resource() for livetree support and
fdt_get_resource() is called when livetree is not supported.
The fdt_get_resource() doesn't do the address translation
so when it is required, but the address translation is done
by ofnode_read_resource() caller, for example in
drivers/firmware/scmi/smt.c::scmi_dt_get_smt_buffer() {
...
ret = ofnode_read_resource(args.node, 0, &resource);
if (ret)
return ret;
faddr = cpu_to_fdt32(resource.start);
paddr = ofnode_translate_address(args.node, &faddr);
...
The both behavior should be aligned and the address translation
must be called in fdt_get_resource() and removed for each caller.
Fixes: a44810123f9e ("dm: core: Add dev_read_resource() to read device resources")
Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>
---
This patch allows to remove the workaround in smci/smt.c
introduced by [1].
But it impact with all user of
- ofnode_read_resource
- ofnode_read_resource_byname
- dev_read_resource
- dev_read_resource_byname
After my first check, the only impacts are in drivers/net/mscc_eswitch
=> I remove the unnecessary translate after code review,
this patch need to be verify on real hardware
I proposed to merge the workaround [1] as soon as possible to avoid issue
on stm32mp1 platform and this patch can be merged when it will be acked
by mscc_eswitch maintainers and other API users.
[1] "scmi: translate the resource only when livetree is not activated"
http://patchwork.ozlabs.org/project/uboot/list/?series=236526&state=*
drivers/firmware/scmi/smt.c | 12 +-----------
drivers/net/mscc_eswitch/jr2_switch.c | 4 +---
drivers/net/mscc_eswitch/ocelot_switch.c | 4 +---
drivers/net/mscc_eswitch/serval_switch.c | 4 +---
drivers/net/mscc_eswitch/servalt_switch.c | 4 +---
lib/fdtdec.c | 6 +++++-
6 files changed, 10 insertions(+), 24 deletions(-)
diff --git a/drivers/firmware/scmi/smt.c b/drivers/firmware/scmi/smt.c
index f1915c0074..e60c2aebc8 100644
--- a/drivers/firmware/scmi/smt.c
+++ b/drivers/firmware/scmi/smt.c
@@ -30,8 +30,6 @@ int scmi_dt_get_smt_buffer(struct udevice *dev, struct scmi_smt *smt)
int ret;
struct ofnode_phandle_args args;
struct resource resource;
- fdt32_t faddr;
- phys_addr_t paddr;
ret = dev_read_phandle_with_args(dev, "shmem", NULL, 0, 0, &args);
if (ret)
@@ -41,21 +39,13 @@ int scmi_dt_get_smt_buffer(struct udevice *dev, struct scmi_smt *smt)
if (ret)
return ret;
- /* TEMP workaround for ofnode_read_resource translation issue */
- if (of_live_active()) {
- paddr = resource.start;
- } else {
- faddr = cpu_to_fdt32(resource.start);
- paddr = ofnode_translate_address(args.node, &faddr);
- }
-
smt->size = resource_size(&resource);
if (smt->size < sizeof(struct scmi_smt_header)) {
dev_err(dev, "Shared memory buffer too small\n");
return -EINVAL;
}
- smt->buf = devm_ioremap(dev, paddr, smt->size);
+ smt->buf = devm_ioremap(dev, resource.start, smt->size);
if (!smt->buf)
return -ENOMEM;
diff --git a/drivers/net/mscc_eswitch/jr2_switch.c b/drivers/net/mscc_eswitch/jr2_switch.c
index 128d7f21ce..bf3e9b56ec 100644
--- a/drivers/net/mscc_eswitch/jr2_switch.c
+++ b/drivers/net/mscc_eswitch/jr2_switch.c
@@ -842,7 +842,6 @@ static int jr2_probe(struct udevice *dev)
int i;
int ret;
struct resource res;
- fdt32_t faddr;
phys_addr_t addr_base;
unsigned long addr_size;
ofnode eth_node, node, mdio_node;
@@ -893,9 +892,8 @@ static int jr2_probe(struct udevice *dev)
if (ofnode_read_resource(mdio_node, 0, &res))
return -ENOMEM;
- faddr = cpu_to_fdt32(res.start);
- addr_base = ofnode_translate_address(mdio_node, &faddr);
+ addr_base = res.start;
addr_size = res.end - res.start;
/* If the bus is new then create a new bus */
diff --git a/drivers/net/mscc_eswitch/ocelot_switch.c b/drivers/net/mscc_eswitch/ocelot_switch.c
index 19e725c6f9..d1d0a489ab 100644
--- a/drivers/net/mscc_eswitch/ocelot_switch.c
+++ b/drivers/net/mscc_eswitch/ocelot_switch.c
@@ -530,7 +530,6 @@ static int ocelot_probe(struct udevice *dev)
struct ocelot_private *priv = dev_get_priv(dev);
int i, ret;
struct resource res;
- fdt32_t faddr;
phys_addr_t addr_base;
unsigned long addr_size;
ofnode eth_node, node, mdio_node;
@@ -578,9 +577,8 @@ static int ocelot_probe(struct udevice *dev)
if (ofnode_read_resource(mdio_node, 0, &res))
return -ENOMEM;
- faddr = cpu_to_fdt32(res.start);
- addr_base = ofnode_translate_address(mdio_node, &faddr);
+ addr_base = res.start;
addr_size = res.end - res.start;
/* If the bus is new then create a new bus */
diff --git a/drivers/net/mscc_eswitch/serval_switch.c b/drivers/net/mscc_eswitch/serval_switch.c
index 09ce33452d..c4b81f7529 100644
--- a/drivers/net/mscc_eswitch/serval_switch.c
+++ b/drivers/net/mscc_eswitch/serval_switch.c
@@ -482,7 +482,6 @@ static int serval_probe(struct udevice *dev)
struct serval_private *priv = dev_get_priv(dev);
int i, ret;
struct resource res;
- fdt32_t faddr;
phys_addr_t addr_base;
unsigned long addr_size;
ofnode eth_node, node, mdio_node;
@@ -533,9 +532,8 @@ static int serval_probe(struct udevice *dev)
if (ofnode_read_resource(mdio_node, 0, &res))
return -ENOMEM;
- faddr = cpu_to_fdt32(res.start);
- addr_base = ofnode_translate_address(mdio_node, &faddr);
+ addr_base = res.start;
addr_size = res.end - res.start;
/* If the bus is new then create a new bus */
diff --git a/drivers/net/mscc_eswitch/servalt_switch.c b/drivers/net/mscc_eswitch/servalt_switch.c
index 4a4e9e4054..f114086ece 100644
--- a/drivers/net/mscc_eswitch/servalt_switch.c
+++ b/drivers/net/mscc_eswitch/servalt_switch.c
@@ -412,7 +412,6 @@ static int servalt_probe(struct udevice *dev)
struct servalt_private *priv = dev_get_priv(dev);
int i;
struct resource res;
- fdt32_t faddr;
phys_addr_t addr_base;
unsigned long addr_size;
ofnode eth_node, node, mdio_node;
@@ -461,9 +460,8 @@ static int servalt_probe(struct udevice *dev)
if (ofnode_read_resource(mdio_node, 0, &res))
return -ENOMEM;
- faddr = cpu_to_fdt32(res.start);
- addr_base = ofnode_translate_address(mdio_node, &faddr);
+ addr_base = res.start;
addr_size = res.end - res.start;
/* If the bus is new then create a new bus */
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 864589193b..4b097fb588 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -942,7 +942,11 @@ int fdt_get_resource(const void *fdt, int node, const char *property,
while (ptr + na + ns <= end) {
if (i == index) {
- res->start = fdtdec_get_number(ptr, na);
+ if (CONFIG_IS_ENABLED(OF_TRANSLATE))
+ res->start = fdt_translate_address(fdt, node, ptr);
+ else
+ res->start = fdtdec_get_number(ptr, na);
+
res->end = res->start;
res->end += fdtdec_get_number(&ptr[na], ns) - 1;
return 0;
--
2.17.1
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