Add API allowing to query and override the name of the alias pointing
at DTB node representing current bootsource.
Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
common/bootsource.c | 74 ++++++++++++++++++++++++++++++++++++++++++++
include/bootsource.h | 2 ++
2 files changed, 76 insertions(+)
diff --git a/common/bootsource.c b/common/bootsource.c
index 78ecd8267..ed435c051 100644
--- a/common/bootsource.c
+++ b/common/bootsource.c
@@ -41,6 +41,80 @@ static const char *bootsource_str[] = {
static enum bootsource bootsource = BOOTSOURCE_UNKNOWN;
static int bootsource_instance = BOOTSOURCE_INSTANCE_UNKNOWN;
+const char *bootsource_alias_name = NULL;
+
+/**
+ * bootsource_get_alias_name() - Get the name of the bootsource alias
+ *
+ * This function will return newly allocated string containing name of
+ * the alias that is expected to point to DTB node corresponding to
+ * detected bootsource
+ *
+ * NOTE: Caller is expected to free() the string allocated by this
+ * function
+ */
+char *bootsource_get_alias_name(void)
+{
+ int instance = bootsource_instance;
+ const char *stem;
+
+ /*
+ * If alias name was overridden via
+ * bootsource_set_alias_name() return that value without
+ * asking any questions.
+ *
+ * Note that we have to strdup() the result to make it
+ * free-able.
+ */
+ if (bootsource_alias_name)
+ return strdup(bootsource_alias_name);
+
+ if (bootsource >= ARRAY_SIZE(bootsource_str) ||
+ bootsource == BOOTSOURCE_UNKNOWN)
+ return NULL;
+
+ switch (bootsource) {
+ case BOOTSOURCE_I2C_EEPROM: /* FALLTHROUGH */
+ case BOOTSOURCE_SPI_EEPROM:
+ /*
+ * For I2C and SPI EEPROMs we set the stem to be 'i2c'
+ * and 'spi' correspondingly. The resulting alias will
+ * be pointing at the controller said EEPROM is
+ * attached to.
+ *
+ * NOTE: This code assumes single bootable EEPROM per
+ * controller
+ */
+ BUILD_BUG_ON(BOOTSOURCE_SPI != BOOTSOURCE_SPI_EEPROM - 1);
+ BUILD_BUG_ON(BOOTSOURCE_I2C != BOOTSOURCE_I2C_EEPROM - 1);
+
+ stem = bootsource_str[bootsource - 1];
+ break;
+ case BOOTSOURCE_SERIAL: /* FALLTHROUGH */
+ case BOOTSOURCE_I2C: /* FALLTHROUGH */
+ case BOOTSOURCE_MMC: /* FALLTHROUGH */
+ case BOOTSOURCE_SPI: /* FALLTHROUGH */
+ case BOOTSOURCE_CAN:
+ stem = bootsource_str[bootsource];
+ break;
+ default:
+ return NULL;
+ }
+
+ /*
+ * Assume 0 if instance was not specified by bootsource
+ * detection code.
+ */
+ if (instance == BOOTSOURCE_INSTANCE_UNKNOWN)
+ instance = 0;
+
+ return basprintf("%s%d", stem, instance);
+}
+
+void bootsource_set_alias_name(const char *name)
+{
+ bootsource_alias_name = name;
+}
void bootsource_set(enum bootsource src)
{
diff --git a/include/bootsource.h b/include/bootsource.h
index 064f6b9a2..29347aaeb 100644
--- a/include/bootsource.h
+++ b/include/bootsource.h
@@ -25,5 +25,7 @@ enum bootsource bootsource_get(void);
int bootsource_get_instance(void);
void bootsource_set(enum bootsource src);
void bootsource_set_instance(int instance);
+void bootsource_set_alias_name(const char *name);
+char *bootsource_get_alias_name(void);
#endif /* __BOOTSOURCE_H__ */
--
2.17.0
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