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-rw-r--r--scripts/dtc/checks.c143
1 files changed, 143 insertions, 0 deletions
diff --git a/scripts/dtc/checks.c b/scripts/dtc/checks.c
index a2cc1036c915..9c9b0c328af6 100644
--- a/scripts/dtc/checks.c
+++ b/scripts/dtc/checks.c
@@ -962,6 +962,143 @@ 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);
+
+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);
+ 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++));
+ if (reg > 0x3ff)
+ FAIL_PROP(c, dti, node, prop, "I2C address must be less than 10-bits, got \"0x%x\"",
+ 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)
+{
+
+ 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 (node_addr_cells(node) != 1)
+ 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;
+
+ 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)
{
@@ -1582,6 +1719,12 @@ 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,