[U-Boot] [PATCH] serial: bcm283x_mu: make pending values more explicit

[Stephen Warren]

dm_serial_ops.pending should return the number of characters, not just a
valid C Boolean integer value. The existing code does already does this,
but only as an accident since BCM283X_MU_LSR_RX_READY happens to be
BIT(0). Enhance the code to be more explicit about the values it returns.

Suggested-by: Simon Glass <sjg at chromium.org>
Signed-off-by: Stephen Warren <swarren at wwwdotorg.org>
---
 drivers/serial/serial_bcm283x_mu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/serial/serial_bcm283x_mu.c b/drivers/serial/serial_bcm283x_mu.c
index fc36bc0e85d6..7357bbfb2679 100644
--- a/drivers/serial/serial_bcm283x_mu.c
+++ b/drivers/serial/serial_bcm283x_mu.c
@@ -116,9 +116,9 @@ static int bcm283x_mu_serial_pending(struct udevice *dev, bool input)
 
 	if (input) {
 		WATCHDOG_RESET();
-		return lsr & BCM283X_MU_LSR_RX_READY;
+		return (lsr & BCM283X_MU_LSR_RX_READY) ? 1 : 0;
 	} else {
-		return !(lsr & BCM283X_MU_LSR_TX_IDLE);
+		return (lsr & BCM283X_MU_LSR_TX_IDLE) ? 0 : 1;
 	}
 }
 
-- 
2.7.4