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linux-can-next-for-6.12-20240830

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Merge tag 'linux-can-next-for-6.12-20240830' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2024-08-30

The first patch is by Duy Nguyen and document the R-Car V4M support in
the rcar-canfd DT bindings.

Frank Li's patch converts the microchip,mcp251x.txt DT bindings
documentation to yaml.

A patch by Zhang Changzhong update a comment in the j1939 CAN
networking stack.

Stefan Mätje's patch updates the CAN configuration netlink code, so
that the bit timing calculation doesn't work on stale
can_priv::ctrlmode data.

Martin Jocic contributes a patch for the kvaser_pciefd driver to
convert some ifdefs into if (IS_ENABLED()).

The last patch is by Yan Zhen and simplifies the probe() function of
the kvaser USB driver by using dev_err_probe().

* tag 'linux-can-next-for-6.12-20240830' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
  can: kvaser_usb: Simplify with dev_err_probe()
  can: kvaser_pciefd: Use IS_ENABLED() instead of #ifdef
  can: netlink: avoid call to do_set_data_bittiming callback with stale can_priv::ctrlmode
  can: j1939: use correct function name in comment
  dt-bindings: can: convert microchip,mcp251x.txt to yaml
  dt-bindings: can: renesas,rcar-canfd: Document R-Car V4M support
====================

Link: https://patch.msgid.link/20240830214406.1605786-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2024-09-02 19:10:44 -07:00
commit da4f3b72c8
7 changed files with 170 additions and 130 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

70
Documentation/devicetree/bindings/net/can/microchip,mcp2510.yaml Normal file
View File

@ -0,0 +1,70 @@
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/can/microchip,mcp2510.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Microchip MCP251X stand-alone CAN controller
maintainers:
- Marc Kleine-Budde <mkl@pengutronix.de>
properties:
compatible:
enum:
- microchip,mcp2510
- microchip,mcp2515
- microchip,mcp25625
reg:
maxItems: 1
clocks:
maxItems: 1
interrupts:
maxItems: 1
vdd-supply:
description: Regulator that powers the CAN controller.
xceiver-supply:
description: Regulator that powers the CAN transceiver.
gpio-controller: true
"#gpio-cells":
const: 2
required:
- compatible
- reg
- clocks
- interrupts
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
can@1 {
compatible = "microchip,mcp2515";
reg = <1>;
clocks = <&clk24m>;
interrupt-parent = <&gpio4>;
interrupts = <13 IRQ_TYPE_LEVEL_LOW>;
vdd-supply = <&reg5v0>;
xceiver-supply = <&reg5v0>;
gpio-controller;
#gpio-cells = <2>;
};
};

30
Documentation/devicetree/bindings/net/can/microchip,mcp251x.txt
View File

@ -1,30 +0,0 @@
* Microchip MCP251X stand-alone CAN controller device tree bindings
Required properties:
- compatible: Should be one of the following:
- "microchip,mcp2510" for MCP2510.
- "microchip,mcp2515" for MCP2515.
- "microchip,mcp25625" for MCP25625.
- reg: SPI chip select.
- clocks: The clock feeding the CAN controller.
- interrupts: Should contain IRQ line for the CAN controller.
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 {
compatible = "microchip,mcp2515";
reg = <1>;
clocks = <&clk24m>;
interrupt-parent = <&gpio4>;
interrupts = <13 IRQ_TYPE_LEVEL_LOW>;
vdd-supply = <&reg5v0>;
xceiver-supply = <&reg5v0>;
gpio-controller;
#gpio-cells = <2>;
};

22
Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
View File

@ -32,6 +32,7 @@ properties:
- enum:
- renesas,r8a779a0-canfd # R-Car V3U
- renesas,r8a779g0-canfd # R-Car V4H
- renesas,r8a779h0-canfd # R-Car V4M
- const: renesas,rcar-gen4-canfd # R-Car Gen4
- items:
@ -163,14 +164,23 @@ allOf:
maxItems: 1
- if:
not:
properties:
compatible:
contains:
const: renesas,rcar-gen4-canfd
properties:
compatible:
contains:
const: renesas,r8a779h0-canfd
then:
patternProperties:
"^channel[2-7]$": false
"^channel[5-7]$": false
else:
if:
not:
properties:
compatible:
contains:
const: renesas,rcar-gen4-canfd
then:
patternProperties:
"^channel[2-7]$": false
unevaluatedProperties: false

102
drivers/net/can/dev/netlink.c
View File

@ -65,15 +65,6 @@ static int can_validate(struct nlattr *tb[], struct nlattr *data[],
if (!data)
return 0;
if (data[IFLA_CAN_BITTIMING]) {
struct can_bittiming bt;
memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
err = can_validate_bittiming(&bt, extack);
if (err)
return err;
}
if (data[IFLA_CAN_CTRLMODE]) {
struct can_ctrlmode *cm = nla_data(data[IFLA_CAN_CTRLMODE]);
u32 tdc_flags = cm->flags & CAN_CTRLMODE_TDC_MASK;
@ -114,6 +105,15 @@ static int can_validate(struct nlattr *tb[], struct nlattr *data[],
}
}
if (data[IFLA_CAN_BITTIMING]) {
struct can_bittiming bt;
memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
err = can_validate_bittiming(&bt, extack);
if (err)
return err;
}
if (is_can_fd) {
if (!data[IFLA_CAN_BITTIMING] || !data[IFLA_CAN_DATA_BITTIMING])
return -EOPNOTSUPP;
@ -195,48 +195,6 @@ static int can_changelink(struct net_device *dev, struct nlattr *tb[],
/* We need synchronization with dev->stop() */
ASSERT_RTNL();
if (data[IFLA_CAN_BITTIMING]) {
struct can_bittiming bt;
/* Do not allow changing bittiming while running */
if (dev->flags & IFF_UP)
return -EBUSY;
/* Calculate bittiming parameters based on
* bittiming_const if set, otherwise pass bitrate
* directly via do_set_bitrate(). Bail out if neither
* is given.
*/
if (!priv->bittiming_const && !priv->do_set_bittiming &&
!priv->bitrate_const)
return -EOPNOTSUPP;
memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
err = can_get_bittiming(dev, &bt,
priv->bittiming_const,
priv->bitrate_const,
priv->bitrate_const_cnt,
extack);
if (err)
return err;
if (priv->bitrate_max && bt.bitrate > priv->bitrate_max) {
NL_SET_ERR_MSG_FMT(extack,
"arbitration bitrate %u bps surpasses transceiver capabilities of %u bps",
bt.bitrate, priv->bitrate_max);
return -EINVAL;
}
memcpy(&priv->bittiming, &bt, sizeof(bt));
if (priv->do_set_bittiming) {
/* Finally, set the bit-timing registers */
err = priv->do_set_bittiming(dev);
if (err)
return err;
}
}
if (data[IFLA_CAN_CTRLMODE]) {
struct can_ctrlmode *cm;
u32 ctrlstatic;
@ -284,6 +242,48 @@ static int can_changelink(struct net_device *dev, struct nlattr *tb[],
priv->ctrlmode &= cm->flags | ~CAN_CTRLMODE_TDC_MASK;
}
if (data[IFLA_CAN_BITTIMING]) {
struct can_bittiming bt;
/* Do not allow changing bittiming while running */
if (dev->flags & IFF_UP)
return -EBUSY;
/* Calculate bittiming parameters based on
* bittiming_const if set, otherwise pass bitrate
* directly via do_set_bitrate(). Bail out if neither
* is given.
*/
if (!priv->bittiming_const && !priv->do_set_bittiming &&
!priv->bitrate_const)
return -EOPNOTSUPP;
memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
err = can_get_bittiming(dev, &bt,
priv->bittiming_const,
priv->bitrate_const,
priv->bitrate_const_cnt,
extack);
if (err)
return err;
if (priv->bitrate_max && bt.bitrate > priv->bitrate_max) {
NL_SET_ERR_MSG_FMT(extack,
"arbitration bitrate %u bps surpasses transceiver capabilities of %u bps",
bt.bitrate, priv->bitrate_max);
return -EINVAL;
}
memcpy(&priv->bittiming, &bt, sizeof(bt));
if (priv->do_set_bittiming) {
/* Finally, set the bit-timing registers */
err = priv->do_set_bittiming(dev);
if (err)
return err;
}
}
if (data[IFLA_CAN_RESTART_MS]) {
/* Do not allow changing restart delay while running */
if (dev->flags & IFF_UP)

26
drivers/net/can/kvaser_pciefd.c
View File

@ -1053,13 +1053,13 @@ static void kvaser_pciefd_write_dma_map_altera(struct kvaser_pciefd *pcie,
void __iomem *serdes_base;
u32 word1, word2;
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
word1 = addr | KVASER_PCIEFD_ALTERA_DMA_64BIT;
word2 = addr >> 32;
#else
word1 = addr;
word2 = 0;
#endif
if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)) {
word1 = lower_32_bits(addr) | KVASER_PCIEFD_ALTERA_DMA_64BIT;
word2 = upper_32_bits(addr);
} else {
word1 = addr;
word2 = 0;
}
serdes_base = KVASER_PCIEFD_SERDES_ADDR(pcie) + 0x8 * index;
iowrite32(word1, serdes_base);
iowrite32(word2, serdes_base + 0x4);
@ -1072,9 +1072,9 @@ static void kvaser_pciefd_write_dma_map_sf2(struct kvaser_pciefd *pcie,
u32 lsb = addr & KVASER_PCIEFD_SF2_DMA_LSB_MASK;
u32 msb = 0x0;
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
msb = addr >> 32;
#endif
if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
msb = upper_32_bits(addr);
serdes_base = KVASER_PCIEFD_SERDES_ADDR(pcie) + 0x10 * index;
iowrite32(lsb, serdes_base);
iowrite32(msb, serdes_base + 0x4);
@ -1087,9 +1087,9 @@ static void kvaser_pciefd_write_dma_map_xilinx(struct kvaser_pciefd *pcie,
u32 lsb = addr & KVASER_PCIEFD_XILINX_DMA_LSB_MASK;
u32 msb = 0x0;
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
msb = addr >> 32;
#endif
if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
msb = upper_32_bits(addr);
serdes_base = KVASER_PCIEFD_SERDES_ADDR(pcie) + 0x8 * index;
iowrite32(msb, serdes_base);
iowrite32(lsb, serdes_base + 0x4);

42
drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c
View File

@ -898,10 +898,8 @@ static int kvaser_usb_probe(struct usb_interface *intf,
ops = driver_info->ops;
err = ops->dev_setup_endpoints(dev);
if (err) {
dev_err(&intf->dev, "Cannot get usb endpoint(s)");
return err;
}
if (err)
return dev_err_probe(&intf->dev, err, "Cannot get usb endpoint(s)");
dev->udev = interface_to_usbdev(intf);
@ -912,26 +910,20 @@ static int kvaser_usb_probe(struct usb_interface *intf,
dev->card_data.ctrlmode_supported = 0;
dev->card_data.capabilities = 0;
err = ops->dev_init_card(dev);
if (err) {
dev_err(&intf->dev,
"Failed to initialize card, error %d\n", err);
return err;
}
if (err)
return dev_err_probe(&intf->dev, err,
"Failed to initialize card\n");
err = ops->dev_get_software_info(dev);
if (err) {
dev_err(&intf->dev,
"Cannot get software info, error %d\n", err);
return err;
}
if (err)
return dev_err_probe(&intf->dev, err,
"Cannot get software info\n");
if (ops->dev_get_software_details) {
err = ops->dev_get_software_details(dev);
if (err) {
dev_err(&intf->dev,
"Cannot get software details, error %d\n", err);
return err;
}
if (err)
return dev_err_probe(&intf->dev, err,
"Cannot get software details\n");
}
if (WARN_ON(!dev->cfg))
@ -945,18 +937,16 @@ static int kvaser_usb_probe(struct usb_interface *intf,
dev_dbg(&intf->dev, "Max outstanding tx = %d URBs\n", dev->max_tx_urbs);
err = ops->dev_get_card_info(dev);
if (err) {
dev_err(&intf->dev, "Cannot get card info, error %d\n", err);
return err;
}
if (err)
return dev_err_probe(&intf->dev, err,
"Cannot get card info\n");
if (ops->dev_get_capabilities) {
err = ops->dev_get_capabilities(dev);
if (err) {
dev_err(&intf->dev,
"Cannot get capabilities, error %d\n", err);
kvaser_usb_remove_interfaces(dev);
return err;
return dev_err_probe(&intf->dev, err,
"Cannot get capabilities\n");
}
}

8
net/can/j1939/transport.c
View File

@ -1179,10 +1179,10 @@ static enum hrtimer_restart j1939_tp_txtimer(struct hrtimer *hrtimer)
break;
case -ENETDOWN:
/* In this case we should get a netdev_event(), all active
* sessions will be cleared by
* j1939_cancel_all_active_sessions(). So handle this as an
* error, but let j1939_cancel_all_active_sessions() do the
* cleanup including propagation of the error to user space.
* sessions will be cleared by j1939_cancel_active_session().
* So handle this as an error, but let
* j1939_cancel_active_session() do the cleanup including
* propagation of the error to user space.
*/
break;
case -EOVERFLOW: