From bb64685c7dc96a14d4ec5d7b2355e40343cf094a Mon Sep 17 00:00:00 2001 From: Andrey Smirnov Date: Thu, 17 May 2018 14:29:15 -0700 Subject: 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 Signed-off-by: Sascha Hauer --- common/bootsource.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) (limited to 'common/bootsource.c') diff --git a/common/bootsource.c b/common/bootsource.c index 78ecd82676..e68338faa5 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) { -- cgit v1.2.3