Merge tag 'linux-can-next-for-5.10-20200921' of...

Merge tag 'linux-can-next-for-5.10-20200921' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2020-09-21

this is a pull request of 38 patches for net-next.

the first 5 patches are by Colin Ian King, Alexandre Belloni and me and they
fix various spelling mistakes.

The next patch is by me and fixes the indention in the CAN raw protocol
according to the kernel coding style.

Diego Elio Pettenò contributes two patches to fix dead links in CAN's Kconfig.

Masahiro Yamada's patch removes the "WITH Linux-syscall-note" from SPDX tag of
C files.

AThe next 4 patches are by me and target the CAN device infrastructure and add
error propagation and improve the output of various messages to ease driver
development and debugging.

YueHaibing's patch for the c_can driver removes an unused inline function.

Next follows another patch by Colin Ian King, which removes the unneeded
initialization of a variable in the mcba_usb driver.

A patch by me annotates a fallthrough in the mscan driver.

The ti_hecc driver is converted to use devm_platform_ioremap_resource_byname()
in a patch by Dejin Zheng.

Liu Shixin's patch converts the pcan_usb_pro driver to make use of
le32_add_cpu() instead of open coding it.

Wang Hai's patch for the peak_pciefd_main driver removes an unused makro.

Vaibhav Gupta's patch converts the pch_can driver to generic power management.

Stephane Grosjean improves the pcan_usb usb driver by first documenting the
commands sent to the device and by adding support of rxerr/txerr counters.

The next patch is by me and cleans up the Kconfig of the CAN SPI drivers.

The next 6 patches all target the mcp251x driver, they are by Timo Schlüßler,
Andy Shevchenko, Tim Harvey and me. They update the DT bindings documentation,
sort the include files alphabetically, add GPIO support, make use of the
readx_poll_timeout() helper, and add support for half duplex SPI-controllers.

Wolfram Sang contributes a patch to update the contact email address in the
mscan driver, while Zhang Changzhong updates the clock handling.

The next patch is by and updates the rx-offload infrastructure to support
callback less usage.

The last 6 patches add support for the mcp25xxfd CAN SPI driver. First the
dt-bindings are added by Oleksij Rempel, the regmap infrastructure and the main
driver is contributed by me. Kurt Van Dijck adds listen-only support,
Manivannan Sadhasivam adds himself as maintainer, and Thomas Kopp himself as a
reviewer.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/can/microchip,mcp251x.txt

@@ -12,6 +12,9 @@ Required properties:
 Optional properties:
  - vdd-supply: Regulator that powers the CAN controller.
  - xceiver-supply: Regulator that powers the CAN transceiver.
+ - gpio-controller: Indicates this device is a GPIO controller.
+ - #gpio-cells: Should be two. The first cell is the pin number and
+                the second cell is used to specify the gpio polarity.
 
 Example:
 	can0: can@1 {
@@ -19,7 +22,9 @@ Example:
 		reg = <1>;
 		clocks = <&clk24m>;
 		interrupt-parent = <&gpio4>;
-		interrupts = <13 0x2>;
+		interrupts = <13 IRQ_TYPE_LEVEL_LOW>;
 		vdd-supply = <&reg5v0>;
 		xceiver-supply = <&reg5v0>;
+		gpio-controller;
+		#gpio-cells = <2>;
 	};

Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml

+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/microchip,mcp25xxfd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title:
+  Microchip MCP2517FD and MCP2518FD stand-alone CAN controller device tree
+  bindings
+
+maintainers:
+  - Marc Kleine-Budde <mkl@pengutronix.de>
+
+properties:
+  compatible:
+    oneOf:
+      - const: microchip,mcp2517fd
+        description: for MCP2517FD
+      - const: microchip,mcp2518fd
+        description: for MCP2518FD
+      - const: microchip,mcp25xxfd
+        description: to autodetect chip variant
+
+  reg:
+    maxItems: 1
+
+  interrupts-extended:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  vdd-supply:
+    description: Regulator that powers the CAN controller.
+    maxItems: 1
+
+  xceiver-supply:
+    description: Regulator that powers the CAN transceiver.
+    maxItems: 1
+
+  microchip,rx-int-gpios:
+    description:
+      GPIO phandle of GPIO connected to to INT1 pin of the MCP25XXFD, which
+      signals a pending RX interrupt.
+    maxItems: 1
+
+  spi-max-frequency:
+    description:
+      Must be half or less of "clocks" frequency.
+    maximum: 20000000
+
+required:
+  - compatible
+  - reg
+  - interrupts-extended
+  - clocks
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    spi0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        can@0 {
+            compatible = "microchip,mcp25xxfd";
+            reg = <0>;
+            clocks = <&can0_osc>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&can0_pins>;
+            spi-max-frequency = <20000000>;
+            interrupts-extended = <&gpio 13 IRQ_TYPE_LEVEL_LOW>;
+            microchip,rx-int-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
+            vdd-supply = <&reg5v0>;
+            xceiver-supply = <&reg5v0>;
+        };
+    };

MAINTAINERS

@@ -10671,6 +10671,15 @@ L:	linux-input@vger.kernel.org
 S:	Maintained
 F:	drivers/hid/hid-mcp2221.c
 
+MCP25XXFD SPI-CAN NETWORK DRIVER
+M:	Marc Kleine-Budde <mkl@pengutronix.de>
+M:	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
+R:	Thomas Kopp <thomas.kopp@microchip.com>
+L:	linux-can@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/net/can/microchip,mcp25xxfd.yaml
+F:	drivers/net/can/spi/mcp25xxfd/
+
 MCP4018 AND MCP4531 MICROCHIP DIGITAL POTENTIOMETER DRIVERS
 M:	Peter Rosin <peda@axentia.se>
 L:	linux-iio@vger.kernel.org

drivers/net/can/Kconfig

@@ -41,8 +41,8 @@ config CAN_SLCAN
 	  www.canusb.com / www.can232.com / www.mictronics.de / www.canhack.de
 
 	  Userspace tools to attach the SLCAN line discipline (slcan_attach,
-	  slcand) can be found in the can-utils at the SocketCAN SVN, see
-	  http://developer.berlios.de/projects/socketcan for details.
+	  slcand) can be found in the can-utils at the linux-can project, see
+	  https://github.com/linux-can/can-utils for details.
 
 	  The slcan driver supports up to 10 CAN netdevices by default which
 	  can be changed by the 'maxdev=xx' module option. This driver can

drivers/net/can/at91_can.c

@@ -643,7 +643,7 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb)
  *
  * The first message goes into mb nr. 1 and issues an interrupt. All
  * rx ints are disabled in the interrupt handler and a napi poll is
- * scheduled. We read the mailbox, but do _not_ reenable the mb (to
+ * scheduled. We read the mailbox, but do _not_ re-enable the mb (to
  * receive another message).
  *
  *    lower mbxs      upper
@@ -661,13 +661,13 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb)
  *
  * The variable priv->rx_next points to the next mailbox to read a
  * message from. As long we're in the lower mailboxes we just read the
- * mailbox but not reenable it.
+ * mailbox but not re-enable it.
  *
- * With completion of the last of the lower mailboxes, we reenable the
+ * With completion of the last of the lower mailboxes, we re-enable the
  * whole first group, but continue to look for filled mailboxes in the
  * upper mailboxes. Imagine the second group like overflow mailboxes,
  * which takes CAN messages if the lower goup is full. While in the
- * upper group we reenable the mailbox right after reading it. Giving
+ * upper group we re-enable the mailbox right after reading it. Giving
  * the chip more room to store messages.
  *
  * After finishing we look again in the lower group if we've still

drivers/net/can/c_can/c_can.c

@@ -356,15 +356,6 @@ static void c_can_setup_tx_object(struct net_device *dev, int iface,
 	}
 }
 
-static inline void c_can_activate_all_lower_rx_msg_obj(struct net_device *dev,
-						       int iface)
-{
-	int i;
-
-	for (i = C_CAN_MSG_OBJ_RX_FIRST; i <= C_CAN_MSG_RX_LOW_LAST; i++)
-		c_can_object_get(dev, iface, i, IF_COMM_CLR_NEWDAT);
-}
-
 static int c_can_handle_lost_msg_obj(struct net_device *dev,
 				     int iface, int objno, u32 ctrl)
 {

drivers/net/can/cc770/cc770.c

@@ -538,7 +538,7 @@ static int cc770_err(struct net_device *dev, u8 status)
 			priv->can.can_stats.error_warning++;
 		}
 	} else {
-		/* Back to error avtive */
+		/* Back to error active */
 		cf->can_id |= CAN_ERR_PROT;
 		cf->data[2] = CAN_ERR_PROT_ACTIVE;
 		priv->can.state = CAN_STATE_ERROR_ACTIVE;

drivers/net/can/cc770/cc770.h

@@ -184,7 +184,7 @@ struct cc770_priv {
 	u8 control_normal_mode;	/* Control register for normal mode */
 	u8 cpu_interface;	/* CPU interface register */
 	u8 clkout;		/* Clock out register */
-	u8 bus_config;		/* Bus conffiguration register */
+	u8 bus_config;		/* Bus configuration register */
 
 	struct sk_buff *tx_skb;
 };

drivers/net/can/dev.c

@@ -371,6 +371,28 @@ static int can_rx_state_to_frame(struct net_device *dev, enum can_state state)
 	}
 }
 
+static const char *can_get_state_str(const enum can_state state)
+{
+	switch (state) {
+	case CAN_STATE_ERROR_ACTIVE:
+		return "Error Active";
+	case CAN_STATE_ERROR_WARNING:
+		return "Error Warning";
+	case CAN_STATE_ERROR_PASSIVE:
+		return "Error Passive";
+	case CAN_STATE_BUS_OFF:
+		return "Bus Off";
+	case CAN_STATE_STOPPED:
+		return "Stopped";
+	case CAN_STATE_SLEEPING:
+		return "Sleeping";
+	default:
+		return "<unknown>";
+	}
+
+	return "<unknown>";
+}
+
 void can_change_state(struct net_device *dev, struct can_frame *cf,
 		      enum can_state tx_state, enum can_state rx_state)
 {
@@ -382,7 +404,9 @@ void can_change_state(struct net_device *dev, struct can_frame *cf,
 		return;
 	}
 
-	netdev_dbg(dev, "New error state: %d\n", new_state);
+	netdev_dbg(dev, "Controller changed from %s State (%d) into %s State (%d).\n",
+		   can_get_state_str(priv->state), priv->state,
+		   can_get_state_str(new_state), new_state);
 
 	can_update_state_error_stats(dev, new_state);
 	priv->state = new_state;
@@ -434,7 +458,7 @@ static void can_flush_echo_skb(struct net_device *dev)
  * of the device driver. The driver must protect access to
  * priv->echo_skb, if necessary.
  */
-void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
+int can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 		     unsigned int idx)
 {
 	struct can_priv *priv = netdev_priv(dev);
@@ -446,13 +470,13 @@ void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 	    (skb->protocol != htons(ETH_P_CAN) &&
 	     skb->protocol != htons(ETH_P_CANFD))) {
 		kfree_skb(skb);
-		return;
+		return 0;
 	}
 
 	if (!priv->echo_skb[idx]) {
 		skb = can_create_echo_skb(skb);
 		if (!skb)
-			return;
+			return -ENOMEM;
 
 		/* make settings for echo to reduce code in irq context */
 		skb->pkt_type = PACKET_BROADCAST;
@@ -463,9 +487,12 @@ void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 		priv->echo_skb[idx] = skb;
 	} else {
 		/* locking problem with netif_stop_queue() ?? */
-		netdev_err(dev, "%s: BUG! echo_skb is occupied!\n", __func__);
+		netdev_err(dev, "%s: BUG! echo_skb %d is occupied!\n", __func__, idx);
 		kfree_skb(skb);
+		return -EBUSY;
 	}
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(can_put_echo_skb);
 
@@ -612,6 +639,10 @@ void can_bus_off(struct net_device *dev)
 {
 	struct can_priv *priv = netdev_priv(dev);
 
+	if (priv->restart_ms)
+		netdev_info(dev, "bus-off, scheduling restart in %d ms\n",
+			    priv->restart_ms);
+	else
 		netdev_info(dev, "bus-off\n");
 
 	netif_carrier_off(dev);

drivers/net/can/flexcan.c

@@ -230,7 +230,7 @@ struct flexcan_regs {
 	/* FIFO-mode:
 	 *			MB
 	 * 0x080...0x08f	0	RX message buffer
-	 * 0x090...0x0df	1-5	reserverd
+	 * 0x090...0x0df	1-5	reserved
 	 * 0x0e0...0x0ff	6-7	8 entry ID table
 	 *				(mx25, mx28, mx35, mx53)
 	 * 0x0e0...0x2df	6-7..37	8..128 entry ID table

drivers/net/can/grcan.c

@@ -726,7 +726,7 @@ static void grcan_err(struct net_device *dev, u32 sources, u32 status)
 			txrx = "on rx ";
 			stats->rx_errors++;
 		}
-		netdev_err(dev, "Fatal AHB buss error %s- halting device\n",
+		netdev_err(dev, "Fatal AHB bus error %s- halting device\n",
 			   txrx);
 
 		spin_lock_irqsave(&priv->lock, flags);
@@ -1243,7 +1243,7 @@ static int grcan_poll(struct napi_struct *napi, int budget)
 	int rx_budget = budget / 2;
 	int tx_budget = budget - rx_budget;
 
-	/* Half of the budget for receiveing messages */
+	/* Half of the budget for receiving messages */
 	rx_work_done = grcan_receive(dev, rx_budget);
 
 	/* Half of the budget for transmitting messages as that can trigger echo

drivers/net/can/m_can/Kconfig

@@ -20,5 +20,5 @@ config CAN_M_CAN_TCAN4X5X
 	tristate "TCAN4X5X M_CAN device"
 	help
 	  Say Y here if you want support for Texas Instruments TCAN4x5x
-	  M_CAN controller.  This device is a peripherial device that uses the
+	  M_CAN controller.  This device is a peripheral device that uses the
 	  SPI bus for communication.

drivers/net/can/mscan/mpc5xxx_can.c

@@ -5,7 +5,7 @@
  * Copyright (C) 2004-2005 Andrey Volkov <avolkov@varma-el.com>,
  *                         Varma Electronics Oy
  * Copyright (C) 2008-2009 Wolfgang Grandegger <wg@grandegger.com>
- * Copyright (C) 2009 Wolfram Sang, Pengutronix <w.sang@pengutronix.de>
+ * Copyright (C) 2009 Wolfram Sang, Pengutronix <kernel@pengutronix.de>
  */
 
 #include <linux/kernel.h>

drivers/net/can/mscan/mscan.c

@@ -209,6 +209,7 @@ static netdev_tx_t mscan_start_xmit(struct sk_buff *skb, struct net_device *dev)
 		 * since buffer with lower id have higher priority (hell..)
 		 */
 		netif_stop_queue(dev);
+		fallthrough;
 	case 2:
 		if (buf_id < priv->prev_buf_id) {
 			priv->cur_pri++;
@@ -540,16 +541,12 @@ static int mscan_open(struct net_device *dev)
 	struct mscan_priv *priv = netdev_priv(dev);
 	struct mscan_regs __iomem *regs = priv->reg_base;
 
-	if (priv->clk_ipg) {
 	ret = clk_prepare_enable(priv->clk_ipg);
 	if (ret)
 		goto exit_retcode;
-	}
-	if (priv->clk_can) {
 	ret = clk_prepare_enable(priv->clk_can);
 	if (ret)
 		goto exit_dis_ipg_clock;
-	}
 
 	/* common open */
 	ret = open_candev(dev);
@@ -583,10 +580,8 @@ static int mscan_open(struct net_device *dev)
 	napi_disable(&priv->napi);
 	close_candev(dev);
 exit_dis_can_clock:
-	if (priv->clk_can)
 	clk_disable_unprepare(priv->clk_can);
 exit_dis_ipg_clock:
-	if (priv->clk_ipg)
 	clk_disable_unprepare(priv->clk_ipg);
 exit_retcode:
 	return ret;
@@ -606,9 +601,7 @@ static int mscan_close(struct net_device *dev)
 	close_candev(dev);
 	free_irq(dev->irq, dev);
 
-	if (priv->clk_can)
 	clk_disable_unprepare(priv->clk_can);
-	if (priv->clk_ipg)
 	clk_disable_unprepare(priv->clk_ipg);
 
 	return 0;

drivers/net/can/pch_can.c

@@ -461,7 +461,7 @@ static void pch_can_int_clr(struct pch_can_priv *priv, u32 mask)
 			       PCH_ID2_DIR | (0x7ff << 2));
 		iowrite32(0x0, &priv->regs->ifregs[1].id1);
 
-		/* Claring NewDat, TxRqst & IntPnd */
+		/* Clearing NewDat, TxRqst & IntPnd */
 		pch_can_bit_clear(&priv->regs->ifregs[1].mcont,
 				  PCH_IF_MCONT_NEWDAT | PCH_IF_MCONT_INTPND |
 				  PCH_IF_MCONT_TXRQXT);
@@ -834,7 +834,7 @@ static int pch_can_open(struct net_device *ndev)
 	struct pch_can_priv *priv = netdev_priv(ndev);
 	int retval;
 
-	/* Regstering the interrupt. */
+	/* Registering the interrupt. */
 	retval = request_irq(priv->dev->irq, pch_can_interrupt, IRQF_SHARED,
 			     ndev->name, ndev);
 	if (retval) {
@@ -957,8 +957,7 @@ static void pch_can_remove(struct pci_dev *pdev)
 	free_candev(priv->ndev);
 }
 
-#ifdef CONFIG_PM
-static void pch_can_set_int_custom(struct pch_can_priv *priv)
+static void __maybe_unused pch_can_set_int_custom(struct pch_can_priv *priv)
 {
 	/* Clearing the IE, SIE and EIE bits of Can control register. */
 	pch_can_bit_clear(&priv->regs->cont, PCH_CTRL_IE_SIE_EIE);
@@ -969,14 +968,14 @@ static void pch_can_set_int_custom(struct pch_can_priv *priv)
 }
 
 /* This function retrieves interrupt enabled for the CAN device. */
-static u32 pch_can_get_int_enables(struct pch_can_priv *priv)
+static u32 __maybe_unused pch_can_get_int_enables(struct pch_can_priv *priv)
 {
 	/* Obtaining the status of IE, SIE and EIE interrupt bits. */
 	return (ioread32(&priv->regs->cont) & PCH_CTRL_IE_SIE_EIE) >> 1;
 }
 
-static u32 pch_can_get_rxtx_ir(struct pch_can_priv *priv, u32 buff_num,
-			       enum pch_ifreg dir)
+static u32 __maybe_unused pch_can_get_rxtx_ir(struct pch_can_priv *priv,
+					      u32 buff_num, enum pch_ifreg dir)
 {
 	u32 ie, enable;
 
@@ -997,7 +996,7 @@ static u32 pch_can_get_rxtx_ir(struct pch_can_priv *priv, u32 buff_num,
 	return enable;
 }
 
-static void pch_can_set_rx_buffer_link(struct pch_can_priv *priv,
+static void __maybe_unused pch_can_set_rx_buffer_link(struct pch_can_priv *priv,
 						      u32 buffer_num, int set)
 {
 	iowrite32(PCH_CMASK_RX_TX_GET, &priv->regs->ifregs[0].cmask);
@@ -1013,7 +1012,8 @@ static void pch_can_set_rx_buffer_link(struct pch_can_priv *priv,
 	pch_can_rw_msg_obj(&priv->regs->ifregs[0].creq, buffer_num);
 }
 
-static u32 pch_can_get_rx_buffer_link(struct pch_can_priv *priv, u32 buffer_num)
+static u32 __maybe_unused pch_can_get_rx_buffer_link(struct pch_can_priv *priv,
+						     u32 buffer_num)
 {
 	u32 link;
 
@@ -1027,20 +1027,19 @@ static u32 pch_can_get_rx_buffer_link(struct pch_can_priv *priv, u32 buffer_num)
 	return link;
 }
 
-static int pch_can_get_buffer_status(struct pch_can_priv *priv)
+static int __maybe_unused pch_can_get_buffer_status(struct pch_can_priv *priv)
 {
 	return (ioread32(&priv->regs->treq1) & 0xffff) |
 	       (ioread32(&priv->regs->treq2) << 16);
 }
 
-static int pch_can_suspend(struct pci_dev *pdev, pm_message_t state)
+static int __maybe_unused pch_can_suspend(struct device *dev_d)
 {
 	int i;
-	int retval;
 	u32 buf_stat;	/* Variable for reading the transmit buffer status. */
 	int counter = PCH_COUNTER_LIMIT;
 
-	struct net_device *dev = pci_get_drvdata(pdev);
+	struct net_device *dev = dev_get_drvdata(dev_d);
 	struct pch_can_priv *priv = netdev_priv(dev);
 
 	/* Stop the CAN controller */
@@ -1058,7 +1057,7 @@ static int pch_can_suspend(struct pci_dev *pdev, pm_message_t state)
 		udelay(1);
 	}
 	if (!counter)
-		dev_err(&pdev->dev, "%s -> Transmission time out.\n", __func__);
+		dev_err(dev_d, "%s -> Transmission time out.\n", __func__);
 
 	/* Save interrupt configuration and then disable them */
 	priv->int_enables = pch_can_get_int_enables(priv);
@@ -1081,35 +1080,16 @@ static int pch_can_suspend(struct pci_dev *pdev, pm_message_t state)
 
 	/* Disable all Receive buffers */
 	pch_can_set_rx_all(priv, 0);
-	retval = pci_save_state(pdev);
-	if (retval) {
-		dev_err(&pdev->dev, "pci_save_state failed.\n");
-	} else {
-		pci_enable_wake(pdev, PCI_D3hot, 0);
-		pci_disable_device(pdev);
-		pci_set_power_state(pdev, pci_choose_state(pdev, state));
-	}
 
-	return retval;
+	return 0;
 }
 
-static int pch_can_resume(struct pci_dev *pdev)
+static int __maybe_unused pch_can_resume(struct device *dev_d)
 {
 	int i;
-	int retval;
-	struct net_device *dev = pci_get_drvdata(pdev);
+	struct net_device *dev = dev_get_drvdata(dev_d);
 	struct pch_can_priv *priv = netdev_priv(dev);
 
-	pci_set_power_state(pdev, PCI_D0);
-	pci_restore_state(pdev);
-	retval = pci_enable_device(pdev);
-	if (retval) {
-		dev_err(&pdev->dev, "pci_enable_device failed.\n");
-		return retval;
-	}
-
-	pci_enable_wake(pdev, PCI_D3hot, 0);
-
 	priv->can.state = CAN_STATE_ERROR_ACTIVE;
 
 	/* Disabling all interrupts. */
@@ -1146,12 +1126,8 @@ static int pch_can_resume(struct pci_dev *pdev)
 	/* Restore Run Mode */
 	pch_can_set_run_mode(priv, PCH_CAN_RUN);
 
-	return retval;
+	return 0;
 }
-#else
-#define pch_can_suspend NULL
-#define pch_can_resume NULL
-#endif
 
 static int pch_can_get_berr_counter(const struct net_device *dev,
 				    struct can_berr_counter *bec)
@@ -1252,13 +1228,16 @@ static int pch_can_probe(struct pci_dev *pdev,
 	return rc;
 }
 
+static SIMPLE_DEV_PM_OPS(pch_can_pm_ops,
+			 pch_can_suspend,
+			 pch_can_resume);
+
 static struct pci_driver pch_can_pci_driver = {
 	.name = "pch_can",
 	.id_table = pch_pci_tbl,
 	.probe = pch_can_probe,
 	.remove = pch_can_remove,
-	.suspend = pch_can_suspend,
-	.resume = pch_can_resume,
+	.driver.pm = &pch_can_pm_ops,
 };
 
 module_pci_driver(pch_can_pci_driver);

drivers/net/can/peak_canfd/peak_pciefd_main.c

@@ -116,8 +116,6 @@ MODULE_LICENSE("GPL v2");
 #define CANFD_CTL_IRQ_CL_DEF	16	/* Rx msg max nb per IRQ in Rx DMA */
 #define CANFD_CTL_IRQ_TL_DEF	10	/* Time before IRQ if < CL (x100 µs) */
 
-#define CANFD_OPTIONS_SET	(CANFD_OPTION_ERROR | CANFD_OPTION_BUSLOAD)
-
 /* Tx anticipation window (link logical address should be aligned on 2K
  * boundary)
  */

drivers/net/can/rx-offload.c

@@ -351,6 +351,17 @@ int can_rx_offload_add_fifo(struct net_device *dev,
 }
 EXPORT_SYMBOL_GPL(can_rx_offload_add_fifo);
 
+int can_rx_offload_add_manual(struct net_device *dev,
+			      struct can_rx_offload *offload,
+			      unsigned int weight)
+{
+	if (offload->mailbox_read)
+		return -EINVAL;
+
+	return can_rx_offload_init_queue(dev, offload, weight);
+}
+EXPORT_SYMBOL_GPL(can_rx_offload_add_manual);
+
 void can_rx_offload_enable(struct can_rx_offload *offload)
 {
 	napi_enable(&offload->napi);

drivers/net/can/sja1000/peak_pci.c

@@ -97,7 +97,7 @@ MODULE_DEVICE_TABLE(pci, peak_pci_tbl);
 /* GPIOICR byte access offsets */
 #define PITA_GPOUT		0x18	/* GPx output value */
 #define PITA_GPIN		0x19	/* GPx input value */
-#define PITA_GPOEN		0x1A	/* configure GPx as ouput pin */
+#define PITA_GPOEN		0x1A	/* configure GPx as output pin */
 
 /* I2C GP bits */
 #define PITA_GPIN_SCL		0x01	/* Serial Clock Line */

drivers/net/can/sja1000/peak_pcmcia.c

@@ -671,7 +671,7 @@ static int pcan_probe(struct pcmcia_device *pdev)
 	card->fw_major = pcan_read_reg(card, PCC_FW_MAJOR);
 	card->fw_minor = pcan_read_reg(card, PCC_FW_MINOR);
 
-	/* display board name and firware version */
+	/* display board name and firmware version */
 	dev_info(&pdev->dev, "PEAK-System pcmcia card %s fw %d.%d\n",
 		pdev->prod_id[1] ? pdev->prod_id[1] : "PCAN-PC Card",
 		card->fw_major, card->fw_minor);

drivers/net/can/softing/Kconfig

@@ -5,14 +5,14 @@ config CAN_SOFTING
 	help
 	  Support for CAN cards from Softing Gmbh & some cards
 	  from Vector Gmbh.
-	  Softing Gmbh CAN cards come with 1 or 2 physical busses.
+	  Softing Gmbh CAN cards come with 1 or 2 physical buses.
 	  Those cards typically use Dual Port RAM to communicate
 	  with the host CPU. The interface is then identical for PCI
 	  and PCMCIA cards. This driver operates on a platform device,
 	  which has been created by softing_cs or softing_pci driver.
 	  Warning:
 	  The API of the card does not allow fine control per bus, but
-	  controls the 2 busses on the card together.
+	  controls the 2 buses on the card together.
 	  As such, some actions (start/stop/busoff recovery) on 1 bus
 	  must bring down the other bus too temporarily.
 
@@ -24,7 +24,7 @@ config CAN_SOFTING_CS
 	  Support for PCMCIA cards from Softing Gmbh & some cards
 	  from Vector Gmbh.
 	  You need firmware for these, which you can get at
-	  http://developer.berlios.de/projects/socketcan/
+	  https://github.com/linux-can/can-firmware
 	  This version of the driver is written against
 	  firmware version 4.6 (softing-fw-4.6-binaries.tar.gz)
 	  In order to use the card as CAN device, you need the Softing generic

drivers/net/can/softing/softing_fw.c

@@ -273,7 +273,7 @@ int softing_load_app_fw(const char *file, struct softing *card)
 			goto failed;
 		}
 
-		/* regualar data */
+		/* regular data */
 		for (sum = 0, j = 0; j < len; ++j)
 			sum += dat[j];
 		/* work in 16bit (target) */
@@ -474,14 +474,14 @@ int softing_startstop(struct net_device *dev, int up)
 	if (ret)
 		goto failed;
 	if (!bus_bitmask_start)
-		/* no busses to be brought up */
+		/* no buses to be brought up */
 		goto card_done;
 
 	if ((bus_bitmask_start & 1) && (bus_bitmask_start & 2)
 			&& (softing_error_reporting(card->net[0])
 				!= softing_error_reporting(card->net[1]))) {
 		dev_alert(&card->pdev->dev,
-				"err_reporting flag differs for busses\n");
+				"err_reporting flag differs for buses\n");
 		goto invalid;
 	}
 	error_reporting = 0;
@@ -635,7 +635,7 @@ int softing_startstop(struct net_device *dev, int up)
 		priv->can.state = CAN_STATE_ERROR_ACTIVE;
 		open_candev(netdev);
 		if (dev != netdev) {
-			/* notify other busses on the restart */
+			/* notify other buses on the restart */
 			softing_netdev_rx(netdev, &msg, 0);
 			++priv->can.can_stats.restarts;
 		}

drivers/net/can/softing/softing_main.c

@@ -170,8 +170,8 @@ static int softing_handle_1(struct softing *card)
 		msg.can_dlc = CAN_ERR_DLC;
 		msg.data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
 		/*
-		 * service to all busses, we don't know which it was applicable
-		 * but only service busses that are online
+		 * service to all buses, we don't know which it was applicable
+		 * but only service buses that are online
 		 */
 		for (j = 0; j < ARRAY_SIZE(card->net); ++j) {
 			netdev = card->net[j];
@@ -339,7 +339,7 @@ static irqreturn_t softing_irq_thread(int irq, void *dev_id)
 			continue;
 		priv = netdev_priv(netdev);
 		if (!canif_is_active(netdev))
-			/* it makes no sense to wake dead busses */
+			/* it makes no sense to wake dead buses */
 			continue;
 		if (priv->tx.pending >= TX_ECHO_SKB_MAX)
 			continue;
@@ -374,7 +374,7 @@ static irqreturn_t softing_irq_v1(int irq, void *dev_id)
 }
 
 /*
- * netdev/candev inter-operability
+ * netdev/candev interoperability
  */
 static int softing_netdev_open(struct net_device *ndev)
 {

drivers/net/can/softing/softing_platform.h

@@ -19,7 +19,7 @@ struct softing_platform_data {
 	 * 16bit, shared interrupt
 	 */
 	int generation;
-	int nbus; /* # busses on device */
+	int nbus; /* # buses on device */
 	unsigned int freq; /* operating frequency in Hz */
 	unsigned int max_brp;
 	unsigned int max_sjw;

drivers/net/can/spi/Kconfig

@@ -4,15 +4,15 @@ menu "CAN SPI interfaces"
 
 config CAN_HI311X
 	tristate "Holt HI311x SPI CAN controllers"
-	depends on CAN_DEV && SPI && HAS_DMA
 	help
 	  Driver for the Holt HI311x SPI CAN controllers.
 
 config CAN_MCP251X
 	tristate "Microchip MCP251x and MCP25625 SPI CAN controllers"
-	depends on HAS_DMA
 	help
 	  Driver for the Microchip MCP251x and MCP25625 SPI CAN
 	  controllers.
 
+source "drivers/net/can/spi/mcp25xxfd/Kconfig"
+
 endmenu

drivers/net/can/spi/Makefile

@@ -6,3 +6,4 @@
 
 obj-$(CONFIG_CAN_HI311X)	+= hi311x.o
 obj-$(CONFIG_CAN_MCP251X)	+= mcp251x.o
+obj-y				+= mcp25xxfd/

drivers/net/can/spi/mcp25xxfd/Kconfig

+# SPDX-License-Identifier: GPL-2.0-only
+
+config CAN_MCP25XXFD
+	tristate "Microchip MCP25xxFD SPI CAN controllers"
+	select REGMAP
+	help
+	  Driver for the Microchip MCP25XXFD SPI FD-CAN controller
+	  family.
+
+config CAN_MCP25XXFD_SANITY
+	depends on CAN_MCP25XXFD
+	bool "Additional Sanity Checks"
+	help
+	  This option enables additional sanity checks in the driver,
+	  that compares various internal counters with the in chip
+	  variants. This comes with a runtime overhead.
+	  Disable if unsure.

drivers/net/can/spi/mcp25xxfd/Makefile

+# SPDX-License-Identifier: GPL-2.0-only
+
+obj-$(CONFIG_CAN_MCP25XXFD) += mcp25xxfd.o
+
+mcp25xxfd-objs :=
+mcp25xxfd-objs += mcp25xxfd-core.o
+mcp25xxfd-objs += mcp25xxfd-crc16.o
+mcp25xxfd-objs += mcp25xxfd-regmap.o

drivers/net/can/spi/mcp25xxfd/mcp25xxfd-crc16.c

+// SPDX-License-Identifier: GPL-2.0
+//
+// mcp25xxfd - Microchip MCP25xxFD Family CAN controller driver
+//
+// Copyright (c) 2020 Pengutronix,
+//                    Marc Kleine-Budde <kernel@pengutronix.de>
+//
+// Based on:
+//
+// CAN bus driver for Microchip 25XXFD CAN Controller with SPI Interface
+//
+// Copyright (c) 2019 Martin Sperl <kernel@martin.sperl.org>
+//
+
+#include "mcp25xxfd.h"
+
+/* The standard crc16 in linux/crc16.h is unfortunately not computing
+ * the correct results (left shift vs. right shift). So here an
+ * implementation with a table generated with the help of:
+ *
+ * http://lkml.iu.edu/hypermail/linux/kernel/0508.1/1085.html
+ */
+static const u16 mcp25xxfd_crc16_table[] = {
+	0x0000, 0x8005, 0x800f, 0x000a, 0x801b, 0x001e, 0x0014, 0x8011,
+	0x8033, 0x0036, 0x003c, 0x8039, 0x0028, 0x802d, 0x8027, 0x0022,
+	0x8063, 0x0066, 0x006c, 0x8069, 0x0078, 0x807d, 0x8077, 0x0072,
+	0x0050, 0x8055, 0x805f, 0x005a, 0x804b, 0x004e, 0x0044, 0x8041,
+	0x80c3, 0x00c6, 0x00cc, 0x80c9, 0x00d8, 0x80dd, 0x80d7, 0x00d2,
+	0x00f0, 0x80f5, 0x80ff, 0x00fa, 0x80eb, 0x00ee, 0x00e4, 0x80e1,
+	0x00a0, 0x80a5, 0x80af, 0x00aa, 0x80bb, 0x00be, 0x00b4, 0x80b1,
+	0x8093, 0x0096, 0x009c, 0x8099, 0x0088, 0x808d, 0x8087, 0x0082,
+	0x8183, 0x0186, 0x018c, 0x8189, 0x0198, 0x819d, 0x8197, 0x0192,
+	0x01b0, 0x81b5, 0x81bf, 0x01ba, 0x81ab, 0x01ae, 0x01a4, 0x81a1,
+	0x01e0, 0x81e5, 0x81ef, 0x01ea, 0x81fb, 0x01fe, 0x01f4, 0x81f1,
+	0x81d3, 0x01d6, 0x01dc, 0x81d9, 0x01c8, 0x81cd, 0x81c7, 0x01c2,
+	0x0140, 0x8145, 0x814f, 0x014a, 0x815b, 0x015e, 0x0154, 0x8151,
+	0x8173, 0x0176, 0x017c, 0x8179, 0x0168, 0x816d, 0x8167, 0x0162,
+	0x8123, 0x0126, 0x012c, 0x8129, 0x0138, 0x813d, 0x8137, 0x0132,
+	0x0110, 0x8115, 0x811f, 0x011a, 0x810b, 0x010e, 0x0104, 0x8101,
+	0x8303, 0x0306, 0x030c, 0x8309, 0x0318, 0x831d, 0x8317, 0x0312,
+	0x0330, 0x8335, 0x833f, 0x033a, 0x832b, 0x032e, 0x0324, 0x8321,
+	0x0360, 0x8365, 0x836f, 0x036a, 0x837b, 0x037e, 0x0374, 0x8371,
+	0x8353, 0x0356, 0x035c, 0x8359, 0x0348, 0x834d, 0x8347, 0x0342,
+	0x03c0, 0x83c5, 0x83cf, 0x03ca, 0x83db, 0x03de, 0x03d4, 0x83d1,
+	0x83f3, 0x03f6, 0x03fc, 0x83f9, 0x03e8, 0x83ed, 0x83e7, 0x03e2,
+	0x83a3, 0x03a6, 0x03ac, 0x83a9, 0x03b8, 0x83bd, 0x83b7, 0x03b2,
+	0x0390, 0x8395, 0x839f, 0x039a, 0x838b, 0x038e, 0x0384, 0x8381,
+	0x0280, 0x8285, 0x828f, 0x028a, 0x829b, 0x029e, 0x0294, 0x8291,
+	0x82b3, 0x02b6, 0x02bc, 0x82b9, 0x02a8, 0x82ad, 0x82a7, 0x02a2,
+	0x82e3, 0x02e6, 0x02ec, 0x82e9, 0x02f8, 0x82fd, 0x82f7, 0x02f2,
+	0x02d0, 0x82d5, 0x82df, 0x02da, 0x82cb, 0x02ce, 0x02c4, 0x82c1,
+	0x8243, 0x0246, 0x024c, 0x8249, 0x0258, 0x825d, 0x8257, 0x0252,
+	0x0270, 0x8275, 0x827f, 0x027a, 0x826b, 0x026e, 0x0264, 0x8261,
+	0x0220, 0x8225, 0x822f, 0x022a, 0x823b, 0x023e, 0x0234, 0x8231,
+	0x8213, 0x0216, 0x021c, 0x8219, 0x0208, 0x820d, 0x8207, 0x0202
+};
+
+static inline u16 mcp25xxfd_crc16_byte(u16 crc, const u8 data)
+{
+	u8 index = (crc >> 8) ^ data;
+
+	return (crc << 8) ^ mcp25xxfd_crc16_table[index];
+}
+
+static u16 mcp25xxfd_crc16(u16 crc, u8 const *buffer, size_t len)
+{
+	while (len--)
+		crc = mcp25xxfd_crc16_byte(crc, *buffer++);
+
+	return crc;
+}
+
+u16 mcp25xxfd_crc16_compute(const void *data, size_t data_size)
+{
+	u16 crc = 0xffff;
+
+	return mcp25xxfd_crc16(crc, data, data_size);
+}
+
+u16 mcp25xxfd_crc16_compute2(const void *cmd, size_t cmd_size,
+			     const void *data, size_t data_size)
+{
+	u16 crc;
+
+	crc = mcp25xxfd_crc16_compute(cmd, cmd_size);
+	crc = mcp25xxfd_crc16(crc, data, data_size);
+
+	return crc;
+}

drivers/net/can/ti_hecc.c

@@ -454,7 +454,7 @@ static int ti_hecc_get_berr_counter(const struct net_device *ndev,
 /* ti_hecc_xmit: HECC Transmit
  *
  * The transmit mailboxes start from 0 to HECC_MAX_TX_MBOX. In HECC the
- * priority of the mailbox for tranmission is dependent upon priority setting
+ * priority of the mailbox for transmission is dependent upon priority setting
  * field in mailbox registers. The mailbox with highest value in priority field
  * is transmitted first. Only when two mailboxes have the same value in
  * priority field the highest numbered mailbox is transmitted first.
@@ -857,7 +857,7 @@ static int ti_hecc_probe(struct platform_device *pdev)
 	struct net_device *ndev = (struct net_device *)0;
 	struct ti_hecc_priv *priv;
 	struct device_node *np = pdev->dev.of_node;
-	struct resource *res, *irq;
+	struct resource *irq;
 	struct regulator *reg_xceiver;
 	int err = -ENODEV;
 
@@ -878,39 +878,22 @@ static int ti_hecc_probe(struct platform_device *pdev)
 	priv = netdev_priv(ndev);
 
 	/* handle hecc memory */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hecc");
-	if (!res) {
-		dev_err(&pdev->dev, "can't get IORESOURCE_MEM hecc\n");
-		return -EINVAL;
-	}
-
-	priv->base = devm_ioremap_resource(&pdev->dev, res);
+	priv->base = devm_platform_ioremap_resource_byname(pdev, "hecc");
 	if (IS_ERR(priv->base)) {
 		dev_err(&pdev->dev, "hecc ioremap failed\n");
 		return PTR_ERR(priv->base);
 	}
 
 	/* handle hecc-ram memory */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hecc-ram");
-	if (!res) {
-		dev_err(&pdev->dev, "can't get IORESOURCE_MEM hecc-ram\n");
-		return -EINVAL;
-	}
-
-	priv->hecc_ram = devm_ioremap_resource(&pdev->dev, res);
+	priv->hecc_ram = devm_platform_ioremap_resource_byname(pdev,
+							       "hecc-ram");
 	if (IS_ERR(priv->hecc_ram)) {
 		dev_err(&pdev->dev, "hecc-ram ioremap failed\n");
 		return PTR_ERR(priv->hecc_ram);
 	}
 
 	/* handle mbx memory */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "mbx");
-	if (!res) {
-		dev_err(&pdev->dev, "can't get IORESOURCE_MEM mbx\n");
-		return -EINVAL;
-	}
-
-	priv->mbx = devm_ioremap_resource(&pdev->dev, res);
+	priv->mbx = devm_platform_ioremap_resource_byname(pdev, "mbx");
 	if (IS_ERR(priv->mbx)) {
 		dev_err(&pdev->dev, "mbx ioremap failed\n");
 		return PTR_ERR(priv->mbx);

drivers/net/can/usb/Kconfig

@@ -90,7 +90,7 @@ config CAN_PEAK_USB
 	tristate "PEAK PCAN-USB/USB Pro interfaces for CAN 2.0b/CAN-FD"
 	help
 	  This driver supports the PEAK-System Technik USB adapters that enable
-	  access to the CAN bus, with repect to the CAN 2.0b and/or CAN-FD
+	  access to the CAN bus, with respect to the CAN 2.0b and/or CAN-FD
 	  standards, that is:
 
 	  PCAN-USB             single CAN 2.0b channel USB adapter

drivers/net/can/usb/gs_usb.c

@@ -828,7 +828,7 @@ static struct gs_can *gs_make_candev(unsigned int channel,
 
 	netdev->flags |= IFF_ECHO; /* we support full roundtrip echo */
 
-	/* dev settup */
+	/* dev setup */
 	strcpy(dev->bt_const.name, "gs_usb");
 	dev->bt_const.tseg1_min = bt_const->tseg1_min;
 	dev->bt_const.tseg1_max = bt_const->tseg1_max;
@@ -852,7 +852,7 @@ static struct gs_can *gs_make_candev(unsigned int channel,
 		dev->tx_context[rc].echo_id = GS_MAX_TX_URBS;
 	}
 
-	/* can settup */
+	/* can setup */
 	dev->can.state = CAN_STATE_STOPPED;
 	dev->can.clock.freq = bt_const->fclk_can;
 	dev->can.bittiming_const = &dev->bt_const;

drivers/net/can/usb/mcba_usb.c

@@ -28,7 +28,7 @@
 #define MCBA_CTX_FREE MCBA_MAX_TX_URBS
 
 /* RX buffer must be bigger than msg size since at the
- * beggining USB messages are stacked.
+ * beginning USB messages are stacked.
  */
 #define MCBA_USB_RX_BUFF_SIZE 64
 #define MCBA_USB_TX_BUFF_SIZE (sizeof(struct mcba_usb_msg))
@@ -793,7 +793,7 @@ static int mcba_usb_probe(struct usb_interface *intf,
 {
 	struct net_device *netdev;
 	struct mcba_priv *priv;
-	int err = -ENOMEM;
+	int err;
 	struct usb_device *usbdev = interface_to_usbdev(intf);
 
 	netdev = alloc_candev(sizeof(struct mcba_priv), MCBA_MAX_TX_URBS);

drivers/net/can/usb/peak_usb/pcan_usb_fd.c

@@ -35,7 +35,7 @@ MODULE_SUPPORTED_DEVICE("PEAK-System PCAN-USB Pro FD adapter");
 #define PCAN_UFD_RX_BUFFER_SIZE		2048
 #define PCAN_UFD_TX_BUFFER_SIZE		512
 
-/* read some versions info from the hw devcie */
+/* read some versions info from the hw device */
 struct __packed pcan_ufd_fw_info {
 	__le16	size_of;	/* sizeof this */
 	__le16	type;		/* type of this structure */
@@ -796,7 +796,7 @@ static int pcan_usb_fd_start(struct peak_usb_device *dev)
 	return err;
 }
 
-/* socket callback used to copy berr counters values receieved through USB */
+/* socket callback used to copy berr counters values received through USB */
 static int pcan_usb_fd_get_berr_counter(const struct net_device *netdev,
 					struct can_berr_counter *bec)
 {

drivers/net/can/usb/peak_usb/pcan_usb_pro.c

@@ -186,7 +186,7 @@ static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, int id, ...)
 
 	len = pc - pm->rec_ptr;
 	if (len > 0) {
-		*pm->u.rec_cnt = cpu_to_le32(le32_to_cpu(*pm->u.rec_cnt) + 1);
+		le32_add_cpu(pm->u.rec_cnt, 1);
 		*pm->rec_ptr = id;
 
 		pm->rec_ptr = pc;
@@ -973,7 +973,7 @@ int pcan_usb_pro_probe(struct usb_interface *intf)
 		struct usb_endpoint_descriptor *ep = &if_desc->endpoint[i].desc;
 
 		/*
-		 * below is the list of valid ep addreses. Any other ep address
+		 * below is the list of valid ep addresses. Any other ep address
 		 * is considered as not-CAN interface address => no dev created
 		 */
 		switch (ep->bEndpointAddress) {

drivers/net/can/usb/ucan.c

@@ -1445,7 +1445,7 @@ static int ucan_probe(struct usb_interface *intf,
 
 	/* request the device information and store it in ctl_msg_buffer
 	 *
-	 * note: ucan_ctrl_command_* wrappers connot be used yet
+	 * note: ucan_ctrl_command_* wrappers cannot be used yet
 	 * because `up` is initialised in Stage 3
 	 */
 	ret = usb_control_msg(udev,
@@ -1494,7 +1494,7 @@ static int ucan_probe(struct usb_interface *intf,
 
 	up = netdev_priv(netdev);
 
-	/* initialze data */
+	/* initialize data */
 	up->udev = udev;
 	up->intf = intf;
 	up->netdev = netdev;

drivers/net/can/usb/usb_8dev.c

@@ -88,7 +88,7 @@ enum usb_8dev_cmd {
 
 /* status */
 #define USB_8DEV_STATUSMSG_OK		0x00  /* Normal condition. */
-#define USB_8DEV_STATUSMSG_OVERRUN	0x01  /* Overrun occured when sending */
+#define USB_8DEV_STATUSMSG_OVERRUN	0x01  /* Overrun occurred when sending */
 #define USB_8DEV_STATUSMSG_BUSLIGHT	0x02  /* Error counter has reached 96 */
 #define USB_8DEV_STATUSMSG_BUSHEAVY	0x03  /* Error count. has reached 128 */
 #define USB_8DEV_STATUSMSG_BUSOFF	0x04  /* Device is in BUSOFF */
@@ -165,7 +165,7 @@ struct __packed usb_8dev_rx_msg {
 /* command frame */
 struct __packed usb_8dev_cmd_msg {
 	u8 begin;
-	u8 channel;	/* unkown - always 0 */
+	u8 channel;	/* unknown - always 0 */
 	u8 command;	/* command to execute */
 	u8 opt1;	/* optional parameter / return value */
 	u8 opt2;	/* optional parameter 2 */

drivers/net/can/xilinx_can.c

@@ -1308,7 +1308,7 @@ static void xcan_tx_interrupt(struct net_device *ndev, u32 isr)
 /**
  * xcan_interrupt - CAN Isr
  * @irq:	irq number
- * @dev_id:	device id poniter
+ * @dev_id:	device id pointer
  *
  * This is the xilinx CAN Isr. It checks for the type of interrupt
  * and invokes the corresponding ISR.

include/linux/can/core.h

@@ -2,7 +2,7 @@
 /*
  * linux/can/core.h
  *
- * Protoypes and definitions for CAN protocol modules using the PF_CAN core
+ * Prototypes and definitions for CAN protocol modules using the PF_CAN core
  *
  * Authors: Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
  *          Urs Thuermann   <urs.thuermann@volkswagen.de>

include/linux/can/dev.h

@@ -108,7 +108,7 @@ static inline bool can_skb_headroom_valid(struct net_device *dev,
 
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 
-		/* preform proper loopback on capable devices */
+		/* perform proper loopback on capable devices */
 		if (dev->flags & IFF_ECHO)
 			skb->pkt_type = PACKET_LOOPBACK;
 		else
@@ -201,7 +201,7 @@ void can_bus_off(struct net_device *dev);
 void can_change_state(struct net_device *dev, struct can_frame *cf,
 		      enum can_state tx_state, enum can_state rx_state);
 
-void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
+int can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 		     unsigned int idx);
 struct sk_buff *__can_get_echo_skb(struct net_device *dev, unsigned int idx,
 				   u8 *len_ptr);

include/linux/can/rx-offload.h

@@ -35,6 +35,9 @@ int can_rx_offload_add_timestamp(struct net_device *dev,
 int can_rx_offload_add_fifo(struct net_device *dev,
 			    struct can_rx_offload *offload,
 			    unsigned int weight);
+int can_rx_offload_add_manual(struct net_device *dev,
+			      struct can_rx_offload *offload,
+			      unsigned int weight);
 int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,
 					 u64 reg);
 int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload);

net/can/af_can.c

@@ -358,7 +358,7 @@ static unsigned int effhash(canid_t can_id)
  *
  * Return:
  *  Pointer to optimal filterlist for the given can_id/mask pair.
- *  Constistency checked mask.
+ *  Consistency checked mask.
  *  Reduced can_id to have a preprocessed filter compare value.
  */
 static struct hlist_head *can_rcv_list_find(canid_t *can_id, canid_t *mask,
@@ -411,7 +411,7 @@ static struct hlist_head *can_rcv_list_find(canid_t *can_id, canid_t *mask,
 /**
  * can_rx_register - subscribe CAN frames from a specific interface
  * @net: the applicable net namespace
- * @dev: pointer to netdevice (NULL => subcribe from 'all' CAN devices list)
+ * @dev: pointer to netdevice (NULL => subscribe from 'all' CAN devices list)
  * @can_id: CAN identifier (see description)
  * @mask: CAN mask (see description)
  * @func: callback function on filter match

net/can/bcm.c

-// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 /*
  * bcm.c - Broadcast Manager to filter/send (cyclic) CAN content
  *

net/can/gw.c

-// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 /* gw.c - CAN frame Gateway/Router/Bridge with netlink interface
  *
  * Copyright (c) 2019 Volkswagen Group Electronic Research

net/can/proc.c

-// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 /*
  * proc.c - procfs support for Protocol family CAN core module
  *

net/can/raw.c

-// SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause)
+// SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
 /* raw.c - Raw sockets for protocol family CAN
  *
  * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
@@ -154,10 +154,10 @@ static void raw_rcv(struct sk_buff *oskb, void *data)
 	if (!skb)
 		return;
 
-	/*  Put the datagram to the queue so that raw_recvmsg() can
-	 *  get it from there.  We need to pass the interface index to
-	 *  raw_recvmsg().  We pass a whole struct sockaddr_can in skb->cb
-	 *  containing the interface index.
+	/* Put the datagram to the queue so that raw_recvmsg() can get
+	 * it from there. We need to pass the interface index to
+	 * raw_recvmsg(). We pass a whole struct sockaddr_can in
+	 * skb->cb containing the interface index.
 	 */
 
 	sock_skb_cb_check_size(sizeof(struct sockaddr_can));