[PATCH] spi: Ensure we always have a maximum speed specified somewhere

Currently all the places where we might specify a maximum transfer speed
are optional, adding complexity every time we have to use the value
since we have to handle unspecified as a special case.  Simplify things
for users by providing a default for controlllers that is the maximum
representable speed.

Signed-off-by: Mark Brown <[email protected]>
---
 drivers/spi/spi.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index d9e6b4b87c89..0a13d0bfd218 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -3542,6 +3542,13 @@ int spi_register_controller(struct spi_controller *ctlr)
 			goto del_ctrl;
 	}
 
+	/*
+	 * Ensure that there's always *some* limit without us needing
+	 * special cases everywhere.
+	 */
+	if (!ctlr->max_speed_hz)
+		ctlr->max_speed_hz = U32_MAX;
+
 	mutex_lock(&board_lock);
 	list_add_tail(&ctlr->list, &spi_controller_list);
 	list_for_each_entry(bi, &board_list, list)

---
base-commit: f5098b6bae761e346ebcd9da7f95622c04733cff
change-id: 20260731-spi-enforce-max-speed-30c53f183635

Best regards,
--  
Mark Brown <[email protected]>