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authorAndrey Smirnov <andrew.smirnov@gmail.com>2018-05-17 14:29:15 -0700
committerSascha Hauer <s.hauer@pengutronix.de>2018-05-18 08:31:32 +0200
commitbb64685c7dc96a14d4ec5d7b2355e40343cf094a (patch)
tree515fc7145f0de395a07941f9cca603d86999705b /common/bootsource.c
parentd0a6fd63f1cf6a5dac5ef40e26e5df7b9880c7f5 (diff)
downloadbarebox-bb64685c7dc96a14d4ec5d7b2355e40343cf094a.tar.gz
bootsource: Add bootsource alias name API
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@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common/bootsource.c')
-rw-r--r--common/bootsource.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/common/bootsource.c b/common/bootsource.c
index 78ecd82..e68338f 100644
--- a/common/bootsource.c
+++ b/common/bootsource.c
@@ -41,6 +41,74 @@ 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)
+{
+ 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);
+
+ switch (bootsource) {
+ /*
+ * 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
+ */
+ case BOOTSOURCE_I2C_EEPROM:
+ stem = bootsource_str[BOOTSOURCE_I2C];
+ break;
+ case BOOTSOURCE_SPI_EEPROM:
+ stem = bootsource_str[BOOTSOURCE_SPI];
+ 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;
+ }
+
+ /*
+ * We expect SoC specific bootsource detction code to properly
+ * initalize bootsource_instance, so we bail out if it didn't
+ */
+ if (bootsource_instance == BOOTSOURCE_INSTANCE_UNKNOWN)
+ return NULL;
+
+ return basprintf("%s%d", stem, bootsource_instance);
+}
+
+void bootsource_set_alias_name(const char *name)
+{
+ bootsource_alias_name = name;
+}
void bootsource_set(enum bootsource src)
{