linux-kernel - [PATCH] can: rockchip_canfd: rkcanfd_chip_fifo_setup(): remove duplicated setup of RX FIFO

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Message-Id: <20250219-rk3568-canfd-v1-1-453869358c72@pengutronix.de>
Date: Wed, 19 Feb 2025 12:15:43 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: kernel@...gutronix.de, Vincent Mailhol <mailhol.vincent@...adoo.fr>, 
 Heiko Stuebner <heiko@...ech.de>
Cc: linux-can@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Robin van der Gracht <robin@...tonic.nl>, 
 Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH] can: rockchip_canfd: rkcanfd_chip_fifo_setup(): remove
 duplicated setup of RX FIFO

From: Robin van der Gracht <robin@...tonic.nl>

The rockchip_canfd driver doesn't make use of the TXE FIFO.

Although the comment states that the TXE FIFO is setup, it's actually
a setup of the RX FIFO. The regular setup of the RX FIFO follows.

Remove the duplicated setup of the RX FIFO.

Fixes: ff60bfbaf67f ("can: rockchip_canfd: add driver for Rockchip CAN-FD controller")
Signed-off-by: Robin van der Gracht <robin@...tonic.nl>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/rockchip/rockchip_canfd-core.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/net/can/rockchip/rockchip_canfd-core.c b/drivers/net/can/rockchip/rockchip_canfd-core.c
index d9a937ba126c..46201c126703 100644
--- a/drivers/net/can/rockchip/rockchip_canfd-core.c
+++ b/drivers/net/can/rockchip/rockchip_canfd-core.c
@@ -236,11 +236,6 @@ static void rkcanfd_chip_fifo_setup(struct rkcanfd_priv *priv)
 {
 	u32 reg;
 
-	/* TXE FIFO */
-	reg = rkcanfd_read(priv, RKCANFD_REG_RX_FIFO_CTRL);
-	reg |= RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_ENABLE;
-	rkcanfd_write(priv, RKCANFD_REG_RX_FIFO_CTRL, reg);
-
 	/* RX FIFO */
 	reg = rkcanfd_read(priv, RKCANFD_REG_RX_FIFO_CTRL);
 	reg |= RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_ENABLE;

---
base-commit: aefd232de5eb2e77e3fc58c56486c7fe7426a228
change-id: 20250219-rk3568-canfd-a0f9c103751e

Best regards,
-- 
Marc Kleine-Budde <mkl@...gutronix.de>