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From: Markus Schneider-Pargmann <msp@baylibre.com>
To: Chandrasekar Ramakrishnan <rcsekar@samsung.com>,
	Marc Kleine-Budde <mkl@pengutronix.de>,
	Wolfgang Grandegger <wg@grandegger.com>
Cc: linux-can@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Markus Schneider-Pargmann <msp@baylibre.com>
Subject: [PATCH v2 08/11] can: tcan4x5x: Remove invalid write in clear_interrupts
Date: Tue,  6 Dec 2022 12:57:25 +0100	[thread overview]
Message-ID: <20221206115728.1056014-9-msp@baylibre.com> (raw)
In-Reply-To: <20221206115728.1056014-1-msp@baylibre.com>

Register 0x824 TCAN4X5X_MCAN_INT_REG is a read-only register. Any writes
to this register do not have any effect.

Remove this write. The m_can driver aldready clears the interrupts in
m_can_isr() by writing to M_CAN_IR which is translated to register
0x1050 which is a writable version of this register.

Fixes: 5443c226ba91 ("can: tcan4x5x: Add tcan4x5x driver to the kernel")
Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
---

Notes:
    v2:
     - Add fixes tag

 drivers/net/can/m_can/tcan4x5x-core.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index 41645a24384c..1fec394b3517 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -204,11 +204,6 @@ static int tcan4x5x_clear_interrupts(struct m_can_classdev *cdev)
 	if (ret)
 		return ret;
 
-	ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_MCAN_INT_REG,
-				      TCAN4X5X_ENABLE_MCAN_INT);
-	if (ret)
-		return ret;
-
 	ret = tcan4x5x_write_tcan_reg(cdev, TCAN4X5X_INT_FLAGS,
 				      TCAN4X5X_CLEAR_ALL_INT);
 	if (ret)
-- 
2.38.1


  parent reply	other threads:[~2022-12-06 11:58 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-06 11:57 [PATCH v2 00/11] can: m_can: Optimizations for tcan and peripheral chips Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 01/11] can: m_can: Eliminate double read of TXFQS in tx_handler Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 02/11] can: m_can: Avoid reading irqstatus twice Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 03/11] can: m_can: Read register PSR only on error Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 04/11] can: m_can: Count TXE FIFO getidx in the driver Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 05/11] can: m_can: Count read getindex " Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 06/11] can: m_can: Batch acknowledge transmit events Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 07/11] can: m_can: Batch acknowledge rx fifo Markus Schneider-Pargmann
2022-12-06 11:57 ` Markus Schneider-Pargmann [this message]
2022-12-06 11:57 ` [PATCH v2 09/11] can: tcan4x5x: Fix use of register error status mask Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 10/11] can: tcan4x5x: Fix register range of first two blocks Markus Schneider-Pargmann
2022-12-06 11:57 ` [PATCH v2 11/11] can: tcan4x5x: Specify separate read/write ranges Markus Schneider-Pargmann
2022-12-06 16:20   ` Marc Kleine-Budde
2022-12-12 10:54     ` Marc Kleine-Budde
2022-12-13 17:10       ` Markus Schneider-Pargmann
2022-12-13 19:10         ` Markus Schneider-Pargmann
2022-12-13 19:13           ` Marc Kleine-Budde

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