mmc: Add a function to dump the mmc capabilities
This adds a simple helper function to display information (bus width and
mode) based on a capability mask. Useful for debug.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 4bfc6bf..ae82914 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1136,6 +1136,30 @@
mmc_set_ios(mmc);
}
+#if CONFIG_IS_ENABLED(MMC_VERBOSE) || defined(DEBUG)
+/*
+ * helper function to display the capabilities in a human
+ * friendly manner. The capabilities include bus width and
+ * supported modes.
+ */
+void mmc_dump_capabilities(const char *text, uint caps)
+{
+ enum bus_mode mode;
+
+ printf("%s: widths [", text);
+ if (caps & MMC_MODE_8BIT)
+ printf("8, ");
+ if (caps & MMC_MODE_4BIT)
+ printf("4, ");
+ printf("1] modes [");
+
+ for (mode = MMC_LEGACY; mode < MMC_MODES_END; mode++)
+ if (MMC_CAP(mode) & caps)
+ printf("%s, ", mmc_mode_name(mode));
+ printf("\b\b]\n");
+}
+#endif
+
static int sd_select_bus_freq_width(struct mmc *mmc)
{
int err;