netdev - [PATCH net-next 05/21] can: sun4i_can: Add support for the Allwinner D1

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Message-Id: <20230728075614.1014117-6-mkl@pengutronix.de>
Date: Fri, 28 Jul 2023 09:55:58 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: netdev@...r.kernel.org
Cc: davem@...emloft.net,
	kuba@...nel.org,
	linux-can@...r.kernel.org,
	kernel@...gutronix.de,
	John Watts <contact@...kia.org>,
	Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 05/21] can: sun4i_can: Add support for the Allwinner D1

From: John Watts <contact@...kia.org>

The controllers present in the D1 are extremely similar to the R40
and require the same reset quirks, but An extra quirk is needed to support
receiving packets.

Signed-off-by: John Watts <contact@...kia.org>
Link: https://lore.kernel.org/all/20230721221552.1973203-6-contact@jookia.org
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/can/Kconfig     |  4 ++--
 drivers/net/can/sun4i_can.c | 12 +++++++++++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/net/can/Kconfig b/drivers/net/can/Kconfig
index 18e4a6e94ba9..649453a3c858 100644
--- a/drivers/net/can/Kconfig
+++ b/drivers/net/can/Kconfig
@@ -190,10 +190,10 @@ config CAN_SLCAN
 
 config CAN_SUN4I
 	tristate "Allwinner A10 CAN controller"
-	depends on MACH_SUN4I || MACH_SUN7I || COMPILE_TEST
+	depends on MACH_SUN4I || MACH_SUN7I || RISCV || COMPILE_TEST
 	help
 	  Say Y here if you want to use CAN controller found on Allwinner
-	  A10/A20 SoCs.
+	  A10/A20/D1 SoCs.
 
 	  To compile this driver as a module, choose M here: the module will
 	  be called sun4i_can.
diff --git a/drivers/net/can/sun4i_can.c b/drivers/net/can/sun4i_can.c
index 1f90fe6dbb8b..c508a328e38d 100644
--- a/drivers/net/can/sun4i_can.c
+++ b/drivers/net/can/sun4i_can.c
@@ -91,6 +91,8 @@
 #define SUN4I_REG_BUF12_ADDR	0x0070	/* CAN Tx/Rx Buffer 12 */
 #define SUN4I_REG_ACPC_ADDR	0x0040	/* CAN Acceptance Code 0 */
 #define SUN4I_REG_ACPM_ADDR	0x0044	/* CAN Acceptance Mask 0 */
+#define SUN4I_REG_ACPC_ADDR_D1	0x0028	/* CAN Acceptance Code 0 on the D1 */
+#define SUN4I_REG_ACPM_ADDR_D1	0x002C	/* CAN Acceptance Mask 0 on the D1 */
 #define SUN4I_REG_RBUF_RBACK_START_ADDR	0x0180	/* CAN transmit buffer start */
 #define SUN4I_REG_RBUF_RBACK_END_ADDR	0x01b0	/* CAN transmit buffer end */
 
@@ -779,6 +781,11 @@ static const struct sun4ican_quirks sun4ican_quirks_r40 = {
 	.acp_offset = 0,
 };
 
+static const struct sun4ican_quirks sun4ican_quirks_d1 = {
+	.has_reset = true,
+	.acp_offset = (SUN4I_REG_ACPC_ADDR_D1 - SUN4I_REG_ACPC_ADDR),
+};
+
 static const struct of_device_id sun4ican_of_match[] = {
 	{
 		.compatible = "allwinner,sun4i-a10-can",
@@ -789,6 +796,9 @@ static const struct of_device_id sun4ican_of_match[] = {
 	}, {
 		.compatible = "allwinner,sun8i-r40-can",
 		.data = &sun4ican_quirks_r40
+	}, {
+		.compatible = "allwinner,sun20i-d1-can",
+		.data = &sun4ican_quirks_d1
 	}, {
 		/* sentinel */
 	},
@@ -913,4 +923,4 @@ module_platform_driver(sun4i_can_driver);
 MODULE_AUTHOR("Peter Chen <xingkongcp@...il.com>");
 MODULE_AUTHOR("Gerhard Bertelsmann <info@...hard-bertelsmann.de>");
 MODULE_LICENSE("Dual BSD/GPL");
-MODULE_DESCRIPTION("CAN driver for Allwinner SoCs (A10/A20)");
+MODULE_DESCRIPTION("CAN driver for Allwinner SoCs (A10/A20/D1)");
-- 
2.40.1