WARNING: please write a help paragraph that fully describes the config symbol
#88: FILE: drivers/net/can/rockchip/Kconfig:3:
+config CAN_ROCKCHIP_CANFD
+	tristate "Rockchip CAN-FD controller"
+	depends on OF || COMPILE_TEST
+	select CAN_RX_OFFLOAD
+	help
+	  Say Y here if you want to use CAN-FD controller found on
+	  Rockchip SoCs.

WARNING: line length of 88 exceeds 80 columns
#243: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:128:
+	tdco = min(tdco, FIELD_MAX(RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_OFFSET));

WARNING: line length of 88 exceeds 80 columns
#245: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:130:
+	reg_tdc = FIELD_PREP(RKCANFD_REG_TRANSMIT_DELAY_COMPENSATION_TDC_OFFSET, tdco) |

WARNING: line length of 86 exceeds 80 columns
#317: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:202:
+	rkcanfd_write(priv, RKCANFD_REG_IDMASK, RKCANFD_REG_IDCODE_EXTENDED_FRAME_ID);

WARNING: line length of 82 exceeds 80 columns
#333: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:218:
+	 * - TIMESTAMP_COUNTER_OVERFLOW_INT - timestamp counter overflow interrupt

WARNING: line length of 86 exceeds 80 columns
#355: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:240:
+static void __rkcanfd_chip_stop(struct rkcanfd_priv *priv, const enum can_state state)

WARNING: line length of 84 exceeds 80 columns
#363: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:248:
+static void rkcanfd_chip_stop(struct rkcanfd_priv *priv, const enum can_state state)

WARNING: line length of 89 exceeds 80 columns
#370: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:255:
+static void rkcanfd_chip_stop_sync(struct rkcanfd_priv *priv, const enum can_state state)

WARNING: line length of 82 exceeds 80 columns
#445: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:330:
+		   reg_ec & RKCANFD_REG_ERROR_CODE_PHASE ? "Data" : "Arbitration",

WARNING: line length of 82 exceeds 80 columns
#682: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:567:
+			"IRQ handler rkcanfd_handle_%s() returned error: %pe\n", \

WARNING: line length of 81 exceeds 80 columns
#762: FILE: drivers/net/can/rockchip/rockchip_canfd-core.c:647:
+	err = request_irq(ndev->irq, rkcanfd_irq, IRQF_SHARED, ndev->name, priv);

total: 0 errors, 11 warnings, 0 checks, 1413 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 690596a2fe21 ("can: rockchip_canfd: add driver for Rockchip CAN-FD controller") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 11 warnings, 0 checks, 1413 lines checked