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-rw-r--r--scripts/dtc/checks.c360
1 files changed, 305 insertions, 55 deletions
diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index c35aa6f886..17cb6890d4 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -1,24 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation. 2007.
- *
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
*/
#include "dtc.h"
+#include "srcpos.h"
#ifdef TRACE_CHECKS
#define TRACE(c, ...) \
@@ -78,23 +64,56 @@ static inline void PRINTF(5, 6) check_msg(struct check *c, struct dt_info *dti,
const char *fmt, ...)
{
va_list ap;
- va_start(ap, fmt);
+ char *str = NULL;
+ struct srcpos *pos = NULL;
+ char *file_str;
+
+ if (!(c->warn && (quiet < 1)) && !(c->error && (quiet < 2)))
+ return;
+
+ if (prop && prop->srcpos)
+ pos = prop->srcpos;
+ else if (node && node->srcpos)
+ pos = node->srcpos;
+
+ if (pos) {
+ file_str = srcpos_string(pos);
+ xasprintf(&str, "%s", file_str);
+ free(file_str);
+ } else if (streq(dti->outname, "-")) {
+ xasprintf(&str, "<stdout>");
+ } else {
+ xasprintf(&str, "%s", dti->outname);
+ }
- if ((c->warn && (quiet < 1))
- || (c->error && (quiet < 2))) {
- fprintf(stderr, "%s: %s (%s): ",
- strcmp(dti->outname, "-") ? dti->outname : "<stdout>",
+ xasprintf_append(&str, ": %s (%s): ",
(c->error) ? "ERROR" : "Warning", c->name);
- if (node) {
- fprintf(stderr, "%s", node->fullpath);
- if (prop)
- fprintf(stderr, ":%s", prop->name);
- fputs(": ", stderr);
- }
- vfprintf(stderr, fmt, ap);
- fprintf(stderr, "\n");
+
+ if (node) {
+ if (prop)
+ xasprintf_append(&str, "%s:%s: ", node->fullpath, prop->name);
+ else
+ xasprintf_append(&str, "%s: ", node->fullpath);
}
+
+ va_start(ap, fmt);
+ xavsprintf_append(&str, fmt, ap);
va_end(ap);
+
+ xasprintf_append(&str, "\n");
+
+ if (!prop && pos) {
+ pos = node->srcpos;
+ while (pos->next) {
+ pos = pos->next;
+
+ file_str = srcpos_string(pos);
+ xasprintf_append(&str, " also defined at %s\n", file_str);
+ free(file_str);
+ }
+ }
+
+ fputs(str, stderr);
}
#define FAIL(c, dti, node, ...) \
@@ -333,7 +352,7 @@ static void check_unit_address_vs_reg(struct check *c, struct dt_info *dti,
FAIL(c, dti, node, "node has a reg or ranges property, but no unit name");
} else {
if (unitname[0])
- FAIL(c, dti, node, "node has a unit name, but no reg property");
+ FAIL(c, dti, node, "node has a unit name, but no reg or ranges property");
}
}
WARNING(unit_address_vs_reg, check_unit_address_vs_reg, NULL);
@@ -626,6 +645,8 @@ ERROR(path_references, fixup_path_references, NULL, &duplicate_node_names);
static void fixup_omit_unused_nodes(struct check *c, struct dt_info *dti,
struct node *node)
{
+ if (generate_symbols && node->labels)
+ return;
if (node->omit_if_unused && !node->is_referenced)
delete_node(node);
}
@@ -670,6 +691,11 @@ static void check_alias_paths(struct check *c, struct dt_info *dti,
return;
for_each_property(node, prop) {
+ if (streq(prop->name, "phandle")
+ || streq(prop->name, "linux,phandle")) {
+ continue;
+ }
+
if (!prop->val.val || !get_node_by_path(dti->dt, prop->val.val)) {
FAIL_PROP(c, dti, node, prop, "aliases property is not a valid node (%s)",
prop->val.val);
@@ -739,13 +765,15 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
{
struct property *prop;
int c_addr_cells, p_addr_cells, c_size_cells, p_size_cells, entrylen;
+ const char *ranges = c->data;
- prop = get_property(node, "ranges");
+ prop = get_property(node, ranges);
if (!prop)
return;
if (!node->parent) {
- FAIL_PROP(c, dti, node, prop, "Root node has a \"ranges\" property");
+ FAIL_PROP(c, dti, node, prop, "Root node has a \"%s\" property",
+ ranges);
return;
}
@@ -757,23 +785,24 @@ static void check_ranges_format(struct check *c, struct dt_info *dti,
if (prop->val.len == 0) {
if (p_addr_cells != c_addr_cells)
- FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
+ FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
"#address-cells (%d) differs from %s (%d)",
- c_addr_cells, node->parent->fullpath,
+ ranges, c_addr_cells, node->parent->fullpath,
p_addr_cells);
if (p_size_cells != c_size_cells)
- FAIL_PROP(c, dti, node, prop, "empty \"ranges\" property but its "
+ FAIL_PROP(c, dti, node, prop, "empty \"%s\" property but its "
"#size-cells (%d) differs from %s (%d)",
- c_size_cells, node->parent->fullpath,
+ ranges, c_size_cells, node->parent->fullpath,
p_size_cells);
} else if ((prop->val.len % entrylen) != 0) {
- FAIL_PROP(c, dti, node, prop, "\"ranges\" property has invalid length (%d bytes) "
+ FAIL_PROP(c, dti, node, prop, "\"%s\" property has invalid length (%d bytes) "
"(parent #address-cells == %d, child #address-cells == %d, "
- "#size-cells == %d)", prop->val.len,
+ "#size-cells == %d)", ranges, prop->val.len,
p_addr_cells, c_addr_cells, c_size_cells);
}
}
-WARNING(ranges_format, check_ranges_format, NULL, &addr_size_cells);
+WARNING(ranges_format, check_ranges_format, "ranges", &addr_size_cells);
+WARNING(dma_ranges_format, check_ranges_format, "dma-ranges", &addr_size_cells);
static const struct bus_type pci_bus = {
.name = "PCI",
@@ -804,10 +833,9 @@ static void check_pci_bridge(struct check *c, struct dt_info *dti, struct node *
FAIL(c, dti, node, "incorrect #size-cells for PCI bridge");
prop = get_property(node, "bus-range");
- if (!prop) {
- FAIL(c, dti, node, "missing bus-range for PCI bridge");
+ if (!prop)
return;
- }
+
if (prop->val.len != (sizeof(cell_t) * 2)) {
FAIL_PROP(c, dti, node, prop, "value must be 2 cells");
return;
@@ -863,10 +891,8 @@ static void check_pci_device_reg(struct check *c, struct dt_info *dti, struct no
return;
prop = get_property(node, "reg");
- if (!prop) {
- FAIL(c, dti, node, "missing PCI reg property");
+ if (!prop)
return;
- }
cells = (cell_t *)prop->val.val;
if (cells[1] || cells[2])
@@ -911,7 +937,7 @@ static bool node_is_compatible(struct node *node, const char *compat)
for (str = prop->val.val, end = str + prop->val.len; str < end;
str += strnlen(str, end - str) + 1) {
- if (strprefixeq(str, end - str, compat))
+ if (streq(str, compat))
return true;
}
return false;
@@ -922,7 +948,8 @@ static void check_simple_bus_bridge(struct check *c, struct dt_info *dti, struct
if (node_is_compatible(node, "simple-bus"))
node->bus = &simple_bus;
}
-WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL, &addr_size_cells);
+WARNING(simple_bus_bridge, check_simple_bus_bridge, NULL,
+ &addr_size_cells, &compatible_is_string_list);
static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
{
@@ -963,6 +990,159 @@ static void check_simple_bus_reg(struct check *c, struct dt_info *dti, struct no
}
WARNING(simple_bus_reg, check_simple_bus_reg, NULL, &reg_format, &simple_bus_bridge);
+static const struct bus_type i2c_bus = {
+ .name = "i2c-bus",
+};
+
+static void check_i2c_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
+{
+ if (strprefixeq(node->name, node->basenamelen, "i2c-bus") ||
+ strprefixeq(node->name, node->basenamelen, "i2c-arb")) {
+ node->bus = &i2c_bus;
+ } else if (strprefixeq(node->name, node->basenamelen, "i2c")) {
+ struct node *child;
+ for_each_child(node, child) {
+ if (strprefixeq(child->name, node->basenamelen, "i2c-bus"))
+ return;
+ }
+ node->bus = &i2c_bus;
+ } else
+ return;
+
+ if (!node->children)
+ return;
+
+ if (node_addr_cells(node) != 1)
+ FAIL(c, dti, node, "incorrect #address-cells for I2C bus");
+ if (node_size_cells(node) != 0)
+ FAIL(c, dti, node, "incorrect #size-cells for I2C bus");
+
+}
+WARNING(i2c_bus_bridge, check_i2c_bus_bridge, NULL, &addr_size_cells);
+
+#define I2C_OWN_SLAVE_ADDRESS (1U << 30)
+#define I2C_TEN_BIT_ADDRESS (1U << 31)
+
+static void check_i2c_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
+{
+ struct property *prop;
+ const char *unitname = get_unitname(node);
+ char unit_addr[17];
+ uint32_t reg = 0;
+ int len;
+ cell_t *cells = NULL;
+
+ if (!node->parent || (node->parent->bus != &i2c_bus))
+ return;
+
+ prop = get_property(node, "reg");
+ if (prop)
+ cells = (cell_t *)prop->val.val;
+
+ if (!cells) {
+ FAIL(c, dti, node, "missing or empty reg property");
+ return;
+ }
+
+ reg = fdt32_to_cpu(*cells);
+ /* Ignore I2C_OWN_SLAVE_ADDRESS */
+ reg &= ~I2C_OWN_SLAVE_ADDRESS;
+ snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
+ if (!streq(unitname, unit_addr))
+ FAIL(c, dti, node, "I2C bus unit address format error, expected \"%s\"",
+ unit_addr);
+
+ for (len = prop->val.len; len > 0; len -= 4) {
+ reg = fdt32_to_cpu(*(cells++));
+ /* Ignore I2C_OWN_SLAVE_ADDRESS */
+ reg &= ~I2C_OWN_SLAVE_ADDRESS;
+
+ if ((reg & I2C_TEN_BIT_ADDRESS) && ((reg & ~I2C_TEN_BIT_ADDRESS) > 0x3ff))
+ FAIL_PROP(c, dti, node, prop, "I2C address must be less than 10-bits, got \"0x%x\"",
+ reg);
+ else if (reg > 0x7f)
+ FAIL_PROP(c, dti, node, prop, "I2C address must be less than 7-bits, got \"0x%x\". Set I2C_TEN_BIT_ADDRESS for 10 bit addresses or fix the property",
+ reg);
+ }
+}
+WARNING(i2c_bus_reg, check_i2c_bus_reg, NULL, &reg_format, &i2c_bus_bridge);
+
+static const struct bus_type spi_bus = {
+ .name = "spi-bus",
+};
+
+static void check_spi_bus_bridge(struct check *c, struct dt_info *dti, struct node *node)
+{
+ int spi_addr_cells = 1;
+
+ if (strprefixeq(node->name, node->basenamelen, "spi")) {
+ node->bus = &spi_bus;
+ } else {
+ /* Try to detect SPI buses which don't have proper node name */
+ struct node *child;
+
+ if (node_addr_cells(node) != 1 || node_size_cells(node) != 0)
+ return;
+
+ for_each_child(node, child) {
+ struct property *prop;
+ for_each_property(child, prop) {
+ if (strprefixeq(prop->name, 4, "spi-")) {
+ node->bus = &spi_bus;
+ break;
+ }
+ }
+ if (node->bus == &spi_bus)
+ break;
+ }
+
+ if (node->bus == &spi_bus && get_property(node, "reg"))
+ FAIL(c, dti, node, "node name for SPI buses should be 'spi'");
+ }
+ if (node->bus != &spi_bus || !node->children)
+ return;
+
+ if (get_property(node, "spi-slave"))
+ spi_addr_cells = 0;
+ if (node_addr_cells(node) != spi_addr_cells)
+ FAIL(c, dti, node, "incorrect #address-cells for SPI bus");
+ if (node_size_cells(node) != 0)
+ FAIL(c, dti, node, "incorrect #size-cells for SPI bus");
+
+}
+WARNING(spi_bus_bridge, check_spi_bus_bridge, NULL, &addr_size_cells);
+
+static void check_spi_bus_reg(struct check *c, struct dt_info *dti, struct node *node)
+{
+ struct property *prop;
+ const char *unitname = get_unitname(node);
+ char unit_addr[9];
+ uint32_t reg = 0;
+ cell_t *cells = NULL;
+
+ if (!node->parent || (node->parent->bus != &spi_bus))
+ return;
+
+ if (get_property(node->parent, "spi-slave"))
+ return;
+
+ prop = get_property(node, "reg");
+ if (prop)
+ cells = (cell_t *)prop->val.val;
+
+ if (!cells) {
+ FAIL(c, dti, node, "missing or empty reg property");
+ return;
+ }
+
+ reg = fdt32_to_cpu(*cells);
+ snprintf(unit_addr, sizeof(unit_addr), "%x", reg);
+ if (!streq(unitname, unit_addr))
+ FAIL(c, dti, node, "SPI bus unit address format error, expected \"%s\"",
+ unit_addr);
+}
+WARNING(spi_bus_reg, check_spi_bus_reg, NULL, &reg_format, &spi_bus_bridge);
+
static void check_unit_address_format(struct check *c, struct dt_info *dti,
struct node *node)
{
@@ -1035,8 +1215,24 @@ static void check_avoid_unnecessary_addr_size(struct check *c, struct dt_info *d
}
WARNING(avoid_unnecessary_addr_size, check_avoid_unnecessary_addr_size, NULL, &avoid_default_addr_size);
-static void check_unique_unit_address(struct check *c, struct dt_info *dti,
- struct node *node)
+static bool node_is_disabled(struct node *node)
+{
+ struct property *prop;
+
+ prop = get_property(node, "status");
+ if (prop) {
+ char *str = prop->val.val;
+ if (streq("disabled", str))
+ return true;
+ }
+
+ return false;
+}
+
+static void check_unique_unit_address_common(struct check *c,
+ struct dt_info *dti,
+ struct node *node,
+ bool disable_check)
{
struct node *childa;
@@ -1053,18 +1249,38 @@ static void check_unique_unit_address(struct check *c, struct dt_info *dti,
if (!strlen(addr_a))
continue;
+ if (disable_check && node_is_disabled(childa))
+ continue;
+
for_each_child(node, childb) {
const char *addr_b = get_unitname(childb);
if (childa == childb)
break;
+ if (disable_check && node_is_disabled(childb))
+ continue;
+
if (streq(addr_a, addr_b))
FAIL(c, dti, childb, "duplicate unit-address (also used in node %s)", childa->fullpath);
}
}
}
+
+static void check_unique_unit_address(struct check *c, struct dt_info *dti,
+ struct node *node)
+{
+ check_unique_unit_address_common(c, dti, node, false);
+}
WARNING(unique_unit_address, check_unique_unit_address, NULL, &avoid_default_addr_size);
+static void check_unique_unit_address_if_enabled(struct check *c, struct dt_info *dti,
+ struct node *node)
+{
+ check_unique_unit_address_common(c, dti, node, true);
+}
+CHECK_ENTRY(unique_unit_address_if_enabled, check_unique_unit_address_if_enabled,
+ NULL, false, false, &avoid_default_addr_size);
+
static void check_obsolete_chosen_interrupt_controller(struct check *c,
struct dt_info *dti,
struct node *node)
@@ -1339,6 +1555,28 @@ static bool node_is_interrupt_provider(struct node *node)
return false;
}
+
+static void check_interrupt_provider(struct check *c,
+ struct dt_info *dti,
+ struct node *node)
+{
+ struct property *prop;
+
+ if (!node_is_interrupt_provider(node))
+ return;
+
+ prop = get_property(node, "#interrupt-cells");
+ if (!prop)
+ FAIL(c, dti, node,
+ "Missing #interrupt-cells in interrupt provider");
+
+ prop = get_property(node, "#address-cells");
+ if (!prop)
+ FAIL(c, dti, node,
+ "Missing #address-cells in interrupt provider");
+}
+WARNING(interrupt_provider, check_interrupt_provider, NULL);
+
static void check_interrupts_property(struct check *c,
struct dt_info *dti,
struct node *node)
@@ -1365,10 +1603,14 @@ static void check_interrupts_property(struct check *c,
prop = get_property(parent, "interrupt-parent");
if (prop) {
phandle = propval_cell(prop);
- /* Give up if this is an overlay with external references */
- if ((phandle == 0 || phandle == -1) &&
- (dti->dtsflags & DTSF_PLUGIN))
+ if ((phandle == 0) || (phandle == -1)) {
+ /* Give up if this is an overlay with
+ * external references */
+ if (dti->dtsflags & DTSF_PLUGIN)
return;
+ FAIL_PROP(c, dti, parent, prop, "Invalid phandle");
+ continue;
+ }
irq_node = get_node_by_phandle(root, phandle);
if (!irq_node) {
@@ -1392,7 +1634,7 @@ static void check_interrupts_property(struct check *c,
prop = get_property(irq_node, "#interrupt-cells");
if (!prop) {
- FAIL(c, dti, irq_node, "Missing #interrupt-cells in interrupt-parent");
+ /* We warn about that already in another test. */
return;
}
@@ -1537,7 +1779,7 @@ static void check_graph_endpoint(struct check *c, struct dt_info *dti,
return;
if (!strprefixeq(node->name, node->basenamelen, "endpoint"))
- FAIL(c, dti, node, "graph endpont node name should be 'endpoint'");
+ FAIL(c, dti, node, "graph endpoint node name should be 'endpoint'");
check_graph_reg(c, dti, node);
@@ -1571,7 +1813,7 @@ static struct check *check_table[] = {
&property_name_chars_strict,
&node_name_chars_strict,
- &addr_size_cells, &reg_format, &ranges_format,
+ &addr_size_cells, &reg_format, &ranges_format, &dma_ranges_format,
&unit_address_vs_reg,
&unit_address_format,
@@ -1583,9 +1825,16 @@ static struct check *check_table[] = {
&simple_bus_bridge,
&simple_bus_reg,
+ &i2c_bus_bridge,
+ &i2c_bus_reg,
+
+ &spi_bus_bridge,
+ &spi_bus_reg,
+
&avoid_default_addr_size,
&avoid_unnecessary_addr_size,
&unique_unit_address,
+ &unique_unit_address_if_enabled,
&obsolete_chosen_interrupt_controller,
&chosen_node_is_root, &chosen_node_bootargs, &chosen_node_stdout_path,
@@ -1609,6 +1858,7 @@ static struct check *check_table[] = {
&deprecated_gpio_property,
&gpios_property,
&interrupts_property,
+ &interrupt_provider,
&alias_paths,
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