Merge tag 'linux-can-next-for-5.19-20220502' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2022-05-02

this is a pull request of 9 patches for net-next/master.

The first patch is by Biju Das and documents renesas,r9a07g043-canfd
support in the renesas,rcar-canfd bindings document.

Jakub Kicinski's patch removes a copy of the NAPI_POLL_WEIGHT define
from the m_can driver.

The last 7 patches all target the ctucanfd driver. Pavel Pisa provides
2 patch which update the documentation. 2 patches by Jiapeng Chong
remove unneeded includes and error messages. And another 3 patches by
Pavel Pisa to further clean up the driver (remove inline keyword,
remove unneeded debug statements, and remove unneeded module parameters).

linux-can-next-for-5.19-20220502

* tag 'linux-can-next-for-5.19-20220502' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
  can: ctucanfd: remove PCI module debug parameters
  can: ctucanfd: remove debug statements
  can: ctucanfd: remove inline keyword from local static functions
  can: ctucanfd: ctucan_platform_probe(): remove unnecessary print function dev_err()
  can: ctucanfd: remove unused including <linux/version.h>
  docs: networking: device drivers: can: ctucanfd: update author e-mail
  docs: networking: device drivers: can: add ctucanfd to index
  can: m_can: remove a copy of the NAPI_POLL_WEIGHT define
  dt-bindings: can: renesas,rcar-canfd: Document RZ/G2UL support
====================

Link: https://lore.kernel.org/r/20220502075914.1905039-1-mkl@pengutronix.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

4 files changed, 12 insertions, 54 deletions

diff --git a/drivers/net/can/ctucanfd/ctucanfd_base.c b/drivers/net/can/ctucanfd/ctucanfd_base.c
index 7a4550f60abb..2ada097d1ede 100644
--- a/drivers/net/can/ctucanfd/ctucanfd_base.c
+++ b/drivers/net/can/ctucanfd/ctucanfd_base.c
@@ -31,7 +31,6 @@
 #include <linux/can/error.h>
 #include <linux/can/led.h>
 #include <linux/pm_runtime.h>
-#include <linux/version.h>
 
 #include "ctucanfd.h"
 #include "ctucanfd_kregs.h"
@@ -133,13 +132,12 @@ static u32 ctucan_read32_be(struct ctucan_priv *priv,
 	return ioread32be(priv->mem_base + reg);
 }
 
-static inline void ctucan_write32(struct ctucan_priv *priv, enum ctu_can_fd_can_registers reg,
-				  u32 val)
+static void ctucan_write32(struct ctucan_priv *priv, enum ctu_can_fd_can_registers reg, u32 val)
 {
 	priv->write_reg(priv, reg, val);
 }
 
-static inline u32 ctucan_read32(struct ctucan_priv *priv, enum ctu_can_fd_can_registers reg)
+static u32 ctucan_read32(struct ctucan_priv *priv, enum ctu_can_fd_can_registers reg)
 {
 	return priv->read_reg(priv, reg);
 }
@@ -179,8 +177,6 @@ static int ctucan_reset(struct net_device *ndev)
 	struct ctucan_priv *priv = netdev_priv(ndev);
 	int i = 100;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	ctucan_write32(priv, CTUCANFD_MODE, REG_MODE_RST);
 	clear_bit(CTUCANFD_FLAG_RX_FFW_BUFFERED, &priv->drv_flags);
 
@@ -266,8 +262,6 @@ static int ctucan_set_bittiming(struct net_device *ndev)
 	struct ctucan_priv *priv = netdev_priv(ndev);
 	struct can_bittiming *bt = &priv->can.bittiming;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	/* Note that bt may be modified here */
 	return ctucan_set_btr(ndev, bt, true);
 }
@@ -283,8 +277,6 @@ static int ctucan_set_data_bittiming(struct net_device *ndev)
 	struct ctucan_priv *priv = netdev_priv(ndev);
 	struct can_bittiming *dbt = &priv->can.data_bittiming;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	/* Note that dbt may be modified here */
 	return ctucan_set_btr(ndev, dbt, false);
 }
@@ -302,8 +294,6 @@ static int ctucan_set_secondary_sample_point(struct net_device *ndev)
 	int ssp_offset = 0;
 	u32 ssp_cfg = 0; /* No SSP by default */
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	if (CTU_CAN_FD_ENABLED(priv)) {
 		netdev_err(ndev, "BUG! Cannot set SSP - CAN is enabled\n");
 		return -EPERM;
@@ -390,8 +380,6 @@ static int ctucan_chip_start(struct net_device *ndev)
 	int err;
 	struct can_ctrlmode mode;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	priv->txb_prio = 0x01234567;
 	priv->txb_head = 0;
 	priv->txb_tail = 0;
@@ -457,8 +445,6 @@ static int ctucan_do_set_mode(struct net_device *ndev, enum can_mode mode)
 {
 	int ret;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	switch (mode) {
 	case CAN_MODE_START:
 		ret = ctucan_reset(ndev);
@@ -486,7 +472,7 @@ static int ctucan_do_set_mode(struct net_device *ndev, enum can_mode mode)
  *
  * Return: Status of TXT buffer
  */
-static inline enum ctucan_txtb_status ctucan_get_tx_status(struct ctucan_priv *priv, u8 buf)
+static enum ctucan_txtb_status ctucan_get_tx_status(struct ctucan_priv *priv, u8 buf)
 {
 	u32 tx_status = ctucan_read32(priv, CTUCANFD_TX_STATUS);
 	enum ctucan_txtb_status status = (tx_status >> (buf * 4)) & 0x7;
@@ -1123,8 +1109,6 @@ static irqreturn_t ctucan_interrupt(int irq, void *dev_id)
 	u32 imask;
 	int irq_loops;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	for (irq_loops = 0; irq_loops < 10000; irq_loops++) {
 		/* Get the interrupt status */
 		isr = ctucan_read32(priv, CTUCANFD_INT_STAT);
@@ -1198,8 +1182,6 @@ static void ctucan_chip_stop(struct net_device *ndev)
 	u32 mask = 0xffffffff;
 	u32 mode;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	/* Disable interrupts and disable CAN */
 	ctucan_write32(priv, CTUCANFD_INT_ENA_CLR, mask);
 	ctucan_write32(priv, CTUCANFD_INT_MASK_SET, mask);
@@ -1222,8 +1204,6 @@ static int ctucan_open(struct net_device *ndev)
 	struct ctucan_priv *priv = netdev_priv(ndev);
 	int ret;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	ret = pm_runtime_get_sync(priv->dev);
 	if (ret < 0) {
 		netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
@@ -1283,8 +1263,6 @@ static int ctucan_close(struct net_device *ndev)
 {
 	struct ctucan_priv *priv = netdev_priv(ndev);
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	netif_stop_queue(ndev);
 	napi_disable(&priv->napi);
 	ctucan_chip_stop(ndev);
@@ -1310,8 +1288,6 @@ static int ctucan_get_berr_counter(const struct net_device *ndev, struct can_ber
 	struct ctucan_priv *priv = netdev_priv(ndev);
 	int ret;
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	ret = pm_runtime_get_sync(priv->dev);
 	if (ret < 0) {
 		netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n", __func__, ret);
@@ -1337,8 +1313,6 @@ int ctucan_suspend(struct device *dev)
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct ctucan_priv *priv = netdev_priv(ndev);
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	if (netif_running(ndev)) {
 		netif_stop_queue(ndev);
 		netif_device_detach(ndev);
@@ -1355,8 +1329,6 @@ int ctucan_resume(struct device *dev)
 	struct net_device *ndev = dev_get_drvdata(dev);
 	struct ctucan_priv *priv = netdev_priv(ndev);
 
-	ctucan_netdev_dbg(ndev, "%s\n", __func__);
-
 	priv->can.state = CAN_STATE_ERROR_ACTIVE;
 
 	if (netif_running(ndev)) {
diff --git a/drivers/net/can/ctucanfd/ctucanfd_pci.c b/drivers/net/can/ctucanfd/ctucanfd_pci.c
index c37a42480533..8f2956a8ae43 100644
--- a/drivers/net/can/ctucanfd/ctucanfd_pci.c
+++ b/drivers/net/can/ctucanfd/ctucanfd_pci.c
@@ -45,14 +45,6 @@
 #define CTUCAN_WITHOUT_CTUCAN_ID  0
 #define CTUCAN_WITH_CTUCAN_ID     1
 
-static bool use_msi = true;
-module_param(use_msi, bool, 0444);
-MODULE_PARM_DESC(use_msi, "PCIe implementation use MSI interrupts. Default: 1 (yes)");
-
-static bool pci_use_second = true;
-module_param(pci_use_second, bool, 0444);
-MODULE_PARM_DESC(pci_use_second, "Use the second CAN core on PCIe card. Default: 1 (yes)");
-
 struct ctucan_pci_board_data {
 	void __iomem *bar0_base;
 	void __iomem *cra_base;
@@ -117,13 +109,11 @@ static int ctucan_pci_probe(struct pci_dev *pdev,
 		goto err_disable_device;
 	}
 
-	if (use_msi) {
-		ret = pci_enable_msi(pdev);
-		if (!ret) {
-			dev_info(dev, "MSI enabled\n");
-			pci_set_master(pdev);
-			msi_ok = 1;
-		}
+	ret = pci_enable_msi(pdev);
+	if (!ret) {
+		dev_info(dev, "MSI enabled\n");
+		pci_set_master(pdev);
+		msi_ok = 1;
 	}
 
 	dev_info(dev, "ctucan BAR0 0x%08llx 0x%08llx\n",
@@ -184,7 +174,7 @@ static int ctucan_pci_probe(struct pci_dev *pdev,
 
 	core_i++;
 
-	while (pci_use_second && (core_i < num_cores)) {
+	while (core_i < num_cores) {
 		addr += 0x4000;
 		ret = ctucan_probe_common(dev, addr, irq, ntxbufs, 100000000,
 					  0, ctucan_pci_set_drvdata);
diff --git a/drivers/net/can/ctucanfd/ctucanfd_platform.c b/drivers/net/can/ctucanfd/ctucanfd_platform.c
index 5e4806068662..89d54c2151e1 100644
--- a/drivers/net/can/ctucanfd/ctucanfd_platform.c
+++ b/drivers/net/can/ctucanfd/ctucanfd_platform.c
@@ -64,7 +64,6 @@ static int ctucan_platform_probe(struct platform_device *pdev)
 	}
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
-		dev_err(dev, "Cannot find interrupt.\n");
 		ret = irq;
 		goto err;
 	}
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 2779bba390f2..e6d2da4a9f41 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -77,9 +77,6 @@ enum m_can_reg {
 	M_CAN_TXEFA	= 0xf8,
 };
 
-/* napi related */
-#define M_CAN_NAPI_WEIGHT	64
-
 /* message ram configuration data length */
 #define MRAM_CFG_LEN	8
 
@@ -951,7 +948,7 @@ static int m_can_rx_peripheral(struct net_device *dev)
 	struct m_can_classdev *cdev = netdev_priv(dev);
 	int work_done;
 
-	work_done = m_can_rx_handler(dev, M_CAN_NAPI_WEIGHT);
+	work_done = m_can_rx_handler(dev, NAPI_POLL_WEIGHT);
 
 	/* Don't re-enable interrupts if the driver had a fatal error
 	 * (e.g., FIFO read failure).
@@ -1474,7 +1471,7 @@ static int m_can_dev_setup(struct m_can_classdev *cdev)
 
 	if (!cdev->is_peripheral)
 		netif_napi_add(dev, &cdev->napi,
-			       m_can_poll, M_CAN_NAPI_WEIGHT);
+			       m_can_poll, NAPI_POLL_WEIGHT);
 
 	/* Shared properties of all M_CAN versions */
 	cdev->version = m_can_version;
@@ -1994,7 +1991,7 @@ int m_can_class_register(struct m_can_classdev *cdev)
 
 	if (cdev->is_peripheral) {
 		ret = can_rx_offload_add_manual(cdev->net, &cdev->offload,
-						M_CAN_NAPI_WEIGHT);
+						NAPI_POLL_WEIGHT);
 		if (ret)
 			goto clk_disable;
 	}