[PATCH 3/5] rtc: gamecube: Explain why fast_io is enabled

[Thorsten Blum <blum@kernel.org>]

Replace the TODO with an explanation of why fast_io is enabled.

Signed-off-by: Thorsten Blum <blum@kernel.org>
---
 drivers/rtc/rtc-gamecube.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-gamecube.c b/drivers/rtc/rtc-gamecube.c
index 25290f162cbc..4b45274effdf 100644
--- a/drivers/rtc/rtc-gamecube.c
+++ b/drivers/rtc/rtc-gamecube.c
@@ -152,7 +152,7 @@ static int exi_write(void *context, u32 reg, u32 data)
 }
 
 static const struct regmap_bus exi_bus = {
-	/* TODO: is that true?  Not that it matters here, but still. */
+	/* Transfers use MMIO and busy-wait for completion without sleeping. */
 	.fast_io = true,
 	.reg_read = exi_read,
 	.reg_write = exi_write,