Merge tag 'linux-can-next-for-5.11-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2020-12-14

All 7 patches are by me and target the m_can driver. First there are 4 cleanup
patches (fix link to doc, fix coding style, uniform variable name usage, mark
function as static). Then the driver is converted to
pm_runtime_resume_and_get(). The next patch lets the m_can class driver
allocate the driver's private data, to get rid of one level of indirection. And
the last patch consistently uses struct m_can_classdev as drvdata over all
binding drivers.

* tag 'linux-can-next-for-5.11-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
  can: m_can: use struct m_can_classdev as drvdata
  can: m_can: let m_can_class_allocate_dev() allocate driver specific private data
  can: m_can: m_can_clk_start(): make use of pm_runtime_resume_and_get()
  can: m_can: m_can_config_endisable(): mark as static
  can: m_can: use cdev as name for struct m_can_classdev uniformly
  can: m_can: convert indention to kernel coding style
  can: m_can: update link to M_CAN user manual
====================

Link: https://lore.kernel.org/r/20201214133145.442472-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

5 files changed, 160 insertions, 167 deletions

diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 06c136961c7c..2c9f12401276 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -5,8 +5,7 @@
 // Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/
 
 /* Bosch M_CAN user manual can be obtained from:
- * http://www.bosch-semiconductors.de/media/pdf_1/ipmodules_1/m_can/
- * mcan_users_manual_v302.pdf
+ * https://github.com/linux-can/can-doc/tree/master/m_can
  */
 
 #include <linux/interrupt.h>
@@ -40,7 +39,7 @@ enum m_can_reg {
 	M_CAN_TOCV	= 0x2c,
 	M_CAN_ECR	= 0x40,
 	M_CAN_PSR	= 0x44,
-/* TDCR Register only available for version >=3.1.x */
+	/* TDCR Register only available for version >=3.1.x */
 	M_CAN_TDCR	= 0x48,
 	M_CAN_IR	= 0x50,
 	M_CAN_IE	= 0x54,
@@ -336,7 +335,7 @@ static u32 m_can_fifo_read(struct m_can_classdev *cdev,
 			   u32 fgi, unsigned int offset)
 {
 	u32 addr_offset = cdev->mcfg[MRAM_RXF0].off + fgi * RXF0_ELEMENT_SIZE +
-			  offset;
+		offset;
 
 	return cdev->ops->read_fifo(cdev, addr_offset);
 }
@@ -345,7 +344,7 @@ static void m_can_fifo_write(struct m_can_classdev *cdev,
 			     u32 fpi, unsigned int offset, u32 val)
 {
 	u32 addr_offset = cdev->mcfg[MRAM_TXB].off + fpi * TXB_ELEMENT_SIZE +
-			  offset;
+		offset;
 
 	cdev->ops->write_fifo(cdev, addr_offset, val);
 }
@@ -359,17 +358,17 @@ static inline void m_can_fifo_write_no_off(struct m_can_classdev *cdev,
 static u32 m_can_txe_fifo_read(struct m_can_classdev *cdev, u32 fgi, u32 offset)
 {
 	u32 addr_offset = cdev->mcfg[MRAM_TXE].off + fgi * TXE_ELEMENT_SIZE +
-			  offset;
+		offset;
 
 	return cdev->ops->read_fifo(cdev, addr_offset);
 }
 
 static inline bool m_can_tx_fifo_full(struct m_can_classdev *cdev)
 {
-		return !!(m_can_read(cdev, M_CAN_TXFQS) & TXFQS_TFQF);
+	return !!(m_can_read(cdev, M_CAN_TXFQS) & TXFQS_TFQF);
 }
 
-void m_can_config_endisable(struct m_can_classdev *cdev, bool enable)
+static void m_can_config_endisable(struct m_can_classdev *cdev, bool enable)
 {
 	u32 cccr = m_can_read(cdev, M_CAN_CCCR);
 	u32 timeout = 10;
@@ -613,18 +612,10 @@ static int __m_can_get_berr_counter(const struct net_device *dev,
 
 static int m_can_clk_start(struct m_can_classdev *cdev)
 {
-	int err;
-
 	if (cdev->pm_clock_support == 0)
 		return 0;
 
-	err = pm_runtime_get_sync(cdev->dev);
-	if (err < 0) {
-		pm_runtime_put_noidle(cdev->dev);
-		return err;
-	}
-
-	return 0;
+	return pm_runtime_resume_and_get(cdev->dev);
 }
 
 static void m_can_clk_stop(struct m_can_classdev *cdev)
@@ -922,14 +913,13 @@ static void m_can_echo_tx_event(struct net_device *dev)
 	m_can_txefs = m_can_read(cdev, M_CAN_TXEFS);
 
 	/* Get Tx Event fifo element count */
-	txe_count = (m_can_txefs & TXEFS_EFFL_MASK)
-			>> TXEFS_EFFL_SHIFT;
+	txe_count = (m_can_txefs & TXEFS_EFFL_MASK) >> TXEFS_EFFL_SHIFT;
 
 	/* Get and process all sent elements */
 	for (i = 0; i < txe_count; i++) {
 		/* retrieve get index */
-		fgi = (m_can_read(cdev, M_CAN_TXEFS) & TXEFS_EFGI_MASK)
-			>> TXEFS_EFGI_SHIFT;
+		fgi = (m_can_read(cdev, M_CAN_TXEFS) & TXEFS_EFGI_MASK) >>
+			TXEFS_EFGI_SHIFT;
 
 		/* get message marker */
 		msg_mark = (m_can_txe_fifo_read(cdev, fgi, 4) &
@@ -1088,7 +1078,7 @@ static int m_can_set_bittiming(struct net_device *dev)
 			 * Transmitter Delay Compensation Section
 			 */
 			tdco = (cdev->can.clock.freq / 1000) *
-			       ssp / dbt->bitrate;
+				ssp / dbt->bitrate;
 
 			/* Max valid TDCO value is 127 */
 			if (tdco > 127) {
@@ -1103,9 +1093,9 @@ static int m_can_set_bittiming(struct net_device *dev)
 		}
 
 		reg_btp |= (brp << DBTP_DBRP_SHIFT) |
-			   (sjw << DBTP_DSJW_SHIFT) |
-			   (tseg1 << DBTP_DTSEG1_SHIFT) |
-			   (tseg2 << DBTP_DTSEG2_SHIFT);
+			(sjw << DBTP_DSJW_SHIFT) |
+			(tseg1 << DBTP_DTSEG1_SHIFT) |
+			(tseg2 << DBTP_DTSEG2_SHIFT);
 
 		m_can_write(cdev, M_CAN_DBTP, reg_btp);
 	}
@@ -1138,7 +1128,7 @@ static void m_can_chip_config(struct net_device *dev)
 	if (cdev->version == 30) {
 		/* only support one Tx Buffer currently */
 		m_can_write(cdev, M_CAN_TXBC, (1 << TXBC_NDTB_SHIFT) |
-				cdev->mcfg[MRAM_TXB].off);
+			    cdev->mcfg[MRAM_TXB].off);
 	} else {
 		/* TX FIFO is used for newer IP Core versions */
 		m_can_write(cdev, M_CAN_TXBC,
@@ -1152,7 +1142,7 @@ static void m_can_chip_config(struct net_device *dev)
 	/* TX Event FIFO */
 	if (cdev->version == 30) {
 		m_can_write(cdev, M_CAN_TXEFC, (1 << TXEFC_EFS_SHIFT) |
-				cdev->mcfg[MRAM_TXE].off);
+			    cdev->mcfg[MRAM_TXE].off);
 	} else {
 		/* Full TX Event FIFO is used */
 		m_can_write(cdev, M_CAN_TXEFC,
@@ -1164,27 +1154,27 @@ static void m_can_chip_config(struct net_device *dev)
 	/* rx fifo configuration, blocking mode, fifo size 1 */
 	m_can_write(cdev, M_CAN_RXF0C,
 		    (cdev->mcfg[MRAM_RXF0].num << RXFC_FS_SHIFT) |
-		     cdev->mcfg[MRAM_RXF0].off);
+		    cdev->mcfg[MRAM_RXF0].off);
 
 	m_can_write(cdev, M_CAN_RXF1C,
 		    (cdev->mcfg[MRAM_RXF1].num << RXFC_FS_SHIFT) |
-		     cdev->mcfg[MRAM_RXF1].off);
+		    cdev->mcfg[MRAM_RXF1].off);
 
 	cccr = m_can_read(cdev, M_CAN_CCCR);
 	test = m_can_read(cdev, M_CAN_TEST);
 	test &= ~TEST_LBCK;
 	if (cdev->version == 30) {
-	/* Version 3.0.x */
+		/* Version 3.0.x */
 
 		cccr &= ~(CCCR_TEST | CCCR_MON | CCCR_DAR |
-			(CCCR_CMR_MASK << CCCR_CMR_SHIFT) |
-			(CCCR_CME_MASK << CCCR_CME_SHIFT));
+			  (CCCR_CMR_MASK << CCCR_CMR_SHIFT) |
+			  (CCCR_CME_MASK << CCCR_CME_SHIFT));
 
 		if (cdev->can.ctrlmode & CAN_CTRLMODE_FD)
 			cccr |= CCCR_CME_CANFD_BRS << CCCR_CME_SHIFT;
 
 	} else {
-	/* Version 3.1.x or 3.2.x */
+		/* Version 3.1.x or 3.2.x */
 		cccr &= ~(CCCR_TEST | CCCR_MON | CCCR_BRSE | CCCR_FDOE |
 			  CCCR_NISO | CCCR_DAR);
 
@@ -1329,80 +1319,79 @@ static bool m_can_niso_supported(struct m_can_classdev *cdev)
 	return !niso_timeout;
 }
 
-static int m_can_dev_setup(struct m_can_classdev *m_can_dev)
+static int m_can_dev_setup(struct m_can_classdev *cdev)
 {
-	struct net_device *dev = m_can_dev->net;
+	struct net_device *dev = cdev->net;
 	int m_can_version;
 
-	m_can_version = m_can_check_core_release(m_can_dev);
+	m_can_version = m_can_check_core_release(cdev);
 	/* return if unsupported version */
 	if (!m_can_version) {
-		dev_err(m_can_dev->dev, "Unsupported version number: %2d",
+		dev_err(cdev->dev, "Unsupported version number: %2d",
 			m_can_version);
 		return -EINVAL;
 	}
 
-	if (!m_can_dev->is_peripheral)
-		netif_napi_add(dev, &m_can_dev->napi,
+	if (!cdev->is_peripheral)
+		netif_napi_add(dev, &cdev->napi,
 			       m_can_poll, M_CAN_NAPI_WEIGHT);
 
 	/* Shared properties of all M_CAN versions */
-	m_can_dev->version = m_can_version;
-	m_can_dev->can.do_set_mode = m_can_set_mode;
-	m_can_dev->can.do_get_berr_counter = m_can_get_berr_counter;
+	cdev->version = m_can_version;
+	cdev->can.do_set_mode = m_can_set_mode;
+	cdev->can.do_get_berr_counter = m_can_get_berr_counter;
 
 	/* Set M_CAN supported operations */
-	m_can_dev->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
-					CAN_CTRLMODE_LISTENONLY |
-					CAN_CTRLMODE_BERR_REPORTING |
-					CAN_CTRLMODE_FD |
-					CAN_CTRLMODE_ONE_SHOT;
+	cdev->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
+		CAN_CTRLMODE_LISTENONLY |
+		CAN_CTRLMODE_BERR_REPORTING |
+		CAN_CTRLMODE_FD |
+		CAN_CTRLMODE_ONE_SHOT;
 
 	/* Set properties depending on M_CAN version */
-	switch (m_can_dev->version) {
+	switch (cdev->version) {
 	case 30:
 		/* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.0.x */
 		can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO);
-		m_can_dev->can.bittiming_const = m_can_dev->bit_timing ?
-			m_can_dev->bit_timing : &m_can_bittiming_const_30X;
+		cdev->can.bittiming_const = cdev->bit_timing ?
+			cdev->bit_timing : &m_can_bittiming_const_30X;
 
-		m_can_dev->can.data_bittiming_const = m_can_dev->data_timing ?
-						m_can_dev->data_timing :
-						&m_can_data_bittiming_const_30X;
+		cdev->can.data_bittiming_const = cdev->data_timing ?
+			cdev->data_timing :
+			&m_can_data_bittiming_const_30X;
 		break;
 	case 31:
 		/* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.1.x */
 		can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO);
-		m_can_dev->can.bittiming_const = m_can_dev->bit_timing ?
-			m_can_dev->bit_timing : &m_can_bittiming_const_31X;
+		cdev->can.bittiming_const = cdev->bit_timing ?
+			cdev->bit_timing : &m_can_bittiming_const_31X;
 
-		m_can_dev->can.data_bittiming_const = m_can_dev->data_timing ?
-						m_can_dev->data_timing :
-						&m_can_data_bittiming_const_31X;
+		cdev->can.data_bittiming_const = cdev->data_timing ?
+			cdev->data_timing :
+			&m_can_data_bittiming_const_31X;
 		break;
 	case 32:
 	case 33:
 		/* Support both MCAN version v3.2.x and v3.3.0 */
-		m_can_dev->can.bittiming_const = m_can_dev->bit_timing ?
-			m_can_dev->bit_timing : &m_can_bittiming_const_31X;
+		cdev->can.bittiming_const = cdev->bit_timing ?
+			cdev->bit_timing : &m_can_bittiming_const_31X;
 
-		m_can_dev->can.data_bittiming_const = m_can_dev->data_timing ?
-						m_can_dev->data_timing :
-						&m_can_data_bittiming_const_31X;
+		cdev->can.data_bittiming_const = cdev->data_timing ?
+			cdev->data_timing :
+			&m_can_data_bittiming_const_31X;
 
-		m_can_dev->can.ctrlmode_supported |=
-						(m_can_niso_supported(m_can_dev)
-						? CAN_CTRLMODE_FD_NON_ISO
-						: 0);
+		cdev->can.ctrlmode_supported |=
+			(m_can_niso_supported(cdev) ?
+			 CAN_CTRLMODE_FD_NON_ISO : 0);
 		break;
 	default:
-		dev_err(m_can_dev->dev, "Unsupported version number: %2d",
-			m_can_dev->version);
+		dev_err(cdev->dev, "Unsupported version number: %2d",
+			cdev->version);
 		return -EINVAL;
 	}
 
-	if (m_can_dev->ops->init)
-		m_can_dev->ops->init(m_can_dev);
+	if (cdev->ops->init)
+		cdev->ops->init(cdev);
 
 	return 0;
 }
@@ -1535,7 +1524,7 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
 
 		/* get put index for frame */
 		putidx = ((m_can_read(cdev, M_CAN_TXFQS) & TXFQS_TFQPI_MASK)
-				  >> TXFQS_TFQPI_SHIFT);
+			  >> TXFQS_TFQPI_SHIFT);
 		/* Write ID Field to FIFO Element */
 		m_can_fifo_write(cdev, putidx, M_CAN_FIFO_ID, id);
 
@@ -1582,7 +1571,7 @@ static netdev_tx_t m_can_tx_handler(struct m_can_classdev *cdev)
 static void m_can_tx_work_queue(struct work_struct *ws)
 {
 	struct m_can_classdev *cdev = container_of(ws, struct m_can_classdev,
-						tx_work);
+						   tx_work);
 
 	m_can_tx_handler(cdev);
 	cdev->tx_skb = NULL;
@@ -1706,26 +1695,26 @@ static void m_can_of_parse_mram(struct m_can_classdev *cdev,
 	cdev->mcfg[MRAM_SIDF].off = mram_config_vals[0];
 	cdev->mcfg[MRAM_SIDF].num = mram_config_vals[1];
 	cdev->mcfg[MRAM_XIDF].off = cdev->mcfg[MRAM_SIDF].off +
-			cdev->mcfg[MRAM_SIDF].num * SIDF_ELEMENT_SIZE;
+		cdev->mcfg[MRAM_SIDF].num * SIDF_ELEMENT_SIZE;
 	cdev->mcfg[MRAM_XIDF].num = mram_config_vals[2];
 	cdev->mcfg[MRAM_RXF0].off = cdev->mcfg[MRAM_XIDF].off +
-			cdev->mcfg[MRAM_XIDF].num * XIDF_ELEMENT_SIZE;
+		cdev->mcfg[MRAM_XIDF].num * XIDF_ELEMENT_SIZE;
 	cdev->mcfg[MRAM_RXF0].num = mram_config_vals[3] &
-			(RXFC_FS_MASK >> RXFC_FS_SHIFT);
+		(RXFC_FS_MASK >> RXFC_FS_SHIFT);
 	cdev->mcfg[MRAM_RXF1].off = cdev->mcfg[MRAM_RXF0].off +
-			cdev->mcfg[MRAM_RXF0].num * RXF0_ELEMENT_SIZE;
+		cdev->mcfg[MRAM_RXF0].num * RXF0_ELEMENT_SIZE;
 	cdev->mcfg[MRAM_RXF1].num = mram_config_vals[4] &
-			(RXFC_FS_MASK >> RXFC_FS_SHIFT);
+		(RXFC_FS_MASK >> RXFC_FS_SHIFT);
 	cdev->mcfg[MRAM_RXB].off = cdev->mcfg[MRAM_RXF1].off +
-			cdev->mcfg[MRAM_RXF1].num * RXF1_ELEMENT_SIZE;
+		cdev->mcfg[MRAM_RXF1].num * RXF1_ELEMENT_SIZE;
 	cdev->mcfg[MRAM_RXB].num = mram_config_vals[5];
 	cdev->mcfg[MRAM_TXE].off = cdev->mcfg[MRAM_RXB].off +
-			cdev->mcfg[MRAM_RXB].num * RXB_ELEMENT_SIZE;
+		cdev->mcfg[MRAM_RXB].num * RXB_ELEMENT_SIZE;
 	cdev->mcfg[MRAM_TXE].num = mram_config_vals[6];
 	cdev->mcfg[MRAM_TXB].off = cdev->mcfg[MRAM_TXE].off +
-			cdev->mcfg[MRAM_TXE].num * TXE_ELEMENT_SIZE;
+		cdev->mcfg[MRAM_TXE].num * TXE_ELEMENT_SIZE;
 	cdev->mcfg[MRAM_TXB].num = mram_config_vals[7] &
-			(TXBC_NDTB_MASK >> TXBC_NDTB_SHIFT);
+		(TXBC_NDTB_MASK >> TXBC_NDTB_SHIFT);
 
 	dev_dbg(cdev->dev,
 		"sidf 0x%x %d xidf 0x%x %d rxf0 0x%x %d rxf1 0x%x %d rxb 0x%x %d txe 0x%x %d txb 0x%x %d\n",
@@ -1754,15 +1743,15 @@ void m_can_init_ram(struct m_can_classdev *cdev)
 }
 EXPORT_SYMBOL_GPL(m_can_init_ram);
 
-int m_can_class_get_clocks(struct m_can_classdev *m_can_dev)
+int m_can_class_get_clocks(struct m_can_classdev *cdev)
 {
 	int ret = 0;
 
-	m_can_dev->hclk = devm_clk_get(m_can_dev->dev, "hclk");
-	m_can_dev->cclk = devm_clk_get(m_can_dev->dev, "cclk");
+	cdev->hclk = devm_clk_get(cdev->dev, "hclk");
+	cdev->cclk = devm_clk_get(cdev->dev, "cclk");
 
-	if (IS_ERR(m_can_dev->cclk)) {
-		dev_err(m_can_dev->dev, "no clock found\n");
+	if (IS_ERR(cdev->cclk)) {
+		dev_err(cdev->dev, "no clock found\n");
 		ret = -ENODEV;
 	}
 
@@ -1770,7 +1759,8 @@ int m_can_class_get_clocks(struct m_can_classdev *m_can_dev)
 }
 EXPORT_SYMBOL_GPL(m_can_class_get_clocks);
 
-struct m_can_classdev *m_can_class_allocate_dev(struct device *dev)
+struct m_can_classdev *m_can_class_allocate_dev(struct device *dev,
+						int sizeof_priv)
 {
 	struct m_can_classdev *class_dev = NULL;
 	u32 mram_config_vals[MRAM_CFG_LEN];
@@ -1793,7 +1783,7 @@ struct m_can_classdev *m_can_class_allocate_dev(struct device *dev)
 	tx_fifo_size = mram_config_vals[7];
 
 	/* allocate the m_can device */
-	net_dev = alloc_candev(sizeof(*class_dev), tx_fifo_size);
+	net_dev = alloc_candev(sizeof_priv, tx_fifo_size);
 	if (!net_dev) {
 		dev_err(dev, "Failed to allocate CAN device");
 		goto out;
@@ -1821,56 +1811,56 @@ void m_can_class_free_dev(struct net_device *net)
 }
 EXPORT_SYMBOL_GPL(m_can_class_free_dev);
 
-int m_can_class_register(struct m_can_classdev *m_can_dev)
+int m_can_class_register(struct m_can_classdev *cdev)
 {
 	int ret;
 
-	if (m_can_dev->pm_clock_support) {
-		ret = m_can_clk_start(m_can_dev);
+	if (cdev->pm_clock_support) {
+		ret = m_can_clk_start(cdev);
 		if (ret)
 			return ret;
 	}
 
-	ret = m_can_dev_setup(m_can_dev);
+	ret = m_can_dev_setup(cdev);
 	if (ret)
 		goto clk_disable;
 
-	ret = register_m_can_dev(m_can_dev->net);
+	ret = register_m_can_dev(cdev->net);
 	if (ret) {
-		dev_err(m_can_dev->dev, "registering %s failed (err=%d)\n",
-			m_can_dev->net->name, ret);
+		dev_err(cdev->dev, "registering %s failed (err=%d)\n",
+			cdev->net->name, ret);
 		goto clk_disable;
 	}
 
-	devm_can_led_init(m_can_dev->net);
+	devm_can_led_init(cdev->net);
 
-	of_can_transceiver(m_can_dev->net);
+	of_can_transceiver(cdev->net);
 
-	dev_info(m_can_dev->dev, "%s device registered (irq=%d, version=%d)\n",
-		 KBUILD_MODNAME, m_can_dev->net->irq, m_can_dev->version);
+	dev_info(cdev->dev, "%s device registered (irq=%d, version=%d)\n",
+		 KBUILD_MODNAME, cdev->net->irq, cdev->version);
 
 	/* Probe finished
 	 * Stop clocks. They will be reactivated once the M_CAN device is opened
 	 */
 clk_disable:
-	m_can_clk_stop(m_can_dev);
+	m_can_clk_stop(cdev);
 
 	return ret;
 }
 EXPORT_SYMBOL_GPL(m_can_class_register);
 
-void m_can_class_unregister(struct m_can_classdev *m_can_dev)
+void m_can_class_unregister(struct m_can_classdev *cdev)
 {
-	unregister_candev(m_can_dev->net);
+	unregister_candev(cdev->net);
 
-	m_can_clk_stop(m_can_dev);
+	m_can_clk_stop(cdev);
 }
 EXPORT_SYMBOL_GPL(m_can_class_unregister);
 
 int m_can_class_suspend(struct device *dev)
 {
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct m_can_classdev *cdev = netdev_priv(ndev);
+	struct m_can_classdev *cdev = dev_get_drvdata(dev);
+	struct net_device *ndev = cdev->net;
 
 	if (netif_running(ndev)) {
 		netif_stop_queue(ndev);
@@ -1889,8 +1879,8 @@ EXPORT_SYMBOL_GPL(m_can_class_suspend);
 
 int m_can_class_resume(struct device *dev)
 {
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct m_can_classdev *cdev = netdev_priv(ndev);
+	struct m_can_classdev *cdev = dev_get_drvdata(dev);
+	struct net_device *ndev = cdev->net;
 
 	pinctrl_pm_select_default_state(dev);
 
diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h
index f8a692596e59..3fda84cef351 100644
--- a/drivers/net/can/m_can/m_can.h
+++ b/drivers/net/can/m_can/m_can.h
@@ -86,8 +86,6 @@ struct m_can_classdev {
 
 	struct m_can_ops *ops;
 
-	void *device_data;
-
 	int version;
 	u32 irqstatus;
 
@@ -97,13 +95,12 @@ struct m_can_classdev {
 	struct mram_cfg mcfg[MRAM_CFG_NUM];
 };
 
-struct m_can_classdev *m_can_class_allocate_dev(struct device *dev);
+struct m_can_classdev *m_can_class_allocate_dev(struct device *dev, int sizeof_priv);
 void m_can_class_free_dev(struct net_device *net);
 int m_can_class_register(struct m_can_classdev *cdev);
 void m_can_class_unregister(struct m_can_classdev *cdev);
 int m_can_class_get_clocks(struct m_can_classdev *cdev);
 void m_can_init_ram(struct m_can_classdev *priv);
-void m_can_config_endisable(struct m_can_classdev *priv, bool enable);
 
 int m_can_class_suspend(struct device *dev);
 int m_can_class_resume(struct device *dev);
diff --git a/drivers/net/can/m_can/m_can_pci.c b/drivers/net/can/m_can/m_can_pci.c
index 04010ee0407c..128808605c3f 100644
--- a/drivers/net/can/m_can/m_can_pci.c
+++ b/drivers/net/can/m_can/m_can_pci.c
@@ -22,26 +22,33 @@
 #define CTL_CSR_INT_CTL_OFFSET		0x508
 
 struct m_can_pci_priv {
+	struct m_can_classdev cdev;
+
 	void __iomem *base;
 };
 
+static inline struct m_can_pci_priv *cdev_to_priv(struct m_can_classdev *cdev)
+{
+	return container_of(cdev, struct m_can_pci_priv, cdev);
+}
+
 static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg)
 {
-	struct m_can_pci_priv *priv = cdev->device_data;
+	struct m_can_pci_priv *priv = cdev_to_priv(cdev);
 
 	return readl(priv->base + reg);
 }
 
 static u32 iomap_read_fifo(struct m_can_classdev *cdev, int offset)
 {
-	struct m_can_pci_priv *priv = cdev->device_data;
+	struct m_can_pci_priv *priv = cdev_to_priv(cdev);
 
 	return readl(priv->base + offset);
 }
 
 static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
 {
-	struct m_can_pci_priv *priv = cdev->device_data;
+	struct m_can_pci_priv *priv = cdev_to_priv(cdev);
 
 	writel(val, priv->base + reg);
 
@@ -50,7 +57,7 @@ static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
 
 static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, int val)
 {
-	struct m_can_pci_priv *priv = cdev->device_data;
+	struct m_can_pci_priv *priv = cdev_to_priv(cdev);
 
 	writel(val, priv->base + offset);
 
@@ -89,28 +96,26 @@ static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 		return -ENOMEM;
 	}
 
-	priv = devm_kzalloc(&pci->dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv)
-		return -ENOMEM;
-
-	mcan_class = m_can_class_allocate_dev(&pci->dev);
+	mcan_class = m_can_class_allocate_dev(&pci->dev,
+					      sizeof(struct m_can_pci_priv));
 	if (!mcan_class)
 		return -ENOMEM;
 
+	priv = cdev_to_priv(mcan_class);
+
 	priv->base = base;
 
 	ret = pci_alloc_irq_vectors(pci, 1, 1, PCI_IRQ_ALL_TYPES);
 	if (ret < 0)
 		return ret;
 
-	mcan_class->device_data = priv;
 	mcan_class->dev = &pci->dev;
 	mcan_class->net->irq = pci_irq_vector(pci, 0);
 	mcan_class->pm_clock_support = 1;
 	mcan_class->can.clock.freq = id->driver_data;
 	mcan_class->ops = &m_can_pci_ops;
 
-	pci_set_drvdata(pci, mcan_class->net);
+	pci_set_drvdata(pci, mcan_class);
 
 	ret = m_can_class_register(mcan_class);
 	if (ret)
@@ -133,9 +138,8 @@ err:
 
 static void m_can_pci_remove(struct pci_dev *pci)
 {
-	struct net_device *dev = pci_get_drvdata(pci);
-	struct m_can_classdev *mcan_class = netdev_priv(dev);
-	struct m_can_pci_priv *priv = mcan_class->device_data;
+	struct m_can_classdev *mcan_class = pci_get_drvdata(pci);
+	struct m_can_pci_priv *priv = cdev_to_priv(mcan_class);
 
 	pm_runtime_forbid(&pci->dev);
 	pm_runtime_get_noresume(&pci->dev);
diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c
index 36ef791da388..599de0e08cd7 100644
--- a/drivers/net/can/m_can/m_can_platform.c
+++ b/drivers/net/can/m_can/m_can_platform.c
@@ -10,27 +10,34 @@
 #include "m_can.h"
 
 struct m_can_plat_priv {
+	struct m_can_classdev cdev;
+
 	void __iomem *base;
 	void __iomem *mram_base;
 };
 
+static inline struct m_can_plat_priv *cdev_to_priv(struct m_can_classdev *cdev)
+{
+	return container_of(cdev, struct m_can_plat_priv, cdev);
+}
+
 static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg)
 {
-	struct m_can_plat_priv *priv = cdev->device_data;
+	struct m_can_plat_priv *priv = cdev_to_priv(cdev);
 
 	return readl(priv->base + reg);
 }
 
 static u32 iomap_read_fifo(struct m_can_classdev *cdev, int offset)
 {
-	struct m_can_plat_priv *priv = cdev->device_data;
+	struct m_can_plat_priv *priv = cdev_to_priv(cdev);
 
 	return readl(priv->mram_base + offset);
 }
 
 static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
 {
-	struct m_can_plat_priv *priv = cdev->device_data;
+	struct m_can_plat_priv *priv = cdev_to_priv(cdev);
 
 	writel(val, priv->base + reg);
 
@@ -39,7 +46,7 @@ static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
 
 static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, int val)
 {
-	struct m_can_plat_priv *priv = cdev->device_data;
+	struct m_can_plat_priv *priv = cdev_to_priv(cdev);
 
 	writel(val, priv->mram_base + offset);
 
@@ -62,17 +69,12 @@ static int m_can_plat_probe(struct platform_device *pdev)
 	void __iomem *mram_addr;
 	int irq, ret = 0;
 
-	mcan_class = m_can_class_allocate_dev(&pdev->dev);
+	mcan_class = m_can_class_allocate_dev(&pdev->dev,
+					      sizeof(struct m_can_plat_priv));
 	if (!mcan_class)
 		return -ENOMEM;
 
-	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv) {
-		ret = -ENOMEM;
-		goto probe_fail;
-	}
-
-	mcan_class->device_data = priv;
+	priv = cdev_to_priv(mcan_class);
 
 	ret = m_can_class_get_clocks(mcan_class);
 	if (ret)
@@ -111,7 +113,7 @@ static int m_can_plat_probe(struct platform_device *pdev)
 
 	mcan_class->is_peripheral = false;
 
-	platform_set_drvdata(pdev, mcan_class->net);
+	platform_set_drvdata(pdev, mcan_class);
 
 	m_can_init_ram(mcan_class);
 
@@ -141,8 +143,8 @@ static __maybe_unused int m_can_resume(struct device *dev)
 
 static int m_can_plat_remove(struct platform_device *pdev)
 {
-	struct net_device *dev = platform_get_drvdata(pdev);
-	struct m_can_classdev *mcan_class = netdev_priv(dev);
+	struct m_can_plat_priv *priv = platform_get_drvdata(pdev);
+	struct m_can_classdev *mcan_class = &priv->cdev;
 
 	m_can_class_unregister(mcan_class);
 
@@ -153,8 +155,8 @@ static int m_can_plat_remove(struct platform_device *pdev)
 
 static int __maybe_unused m_can_runtime_suspend(struct device *dev)
 {
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct m_can_classdev *mcan_class = netdev_priv(ndev);
+	struct m_can_plat_priv *priv = dev_get_drvdata(dev);
+	struct m_can_classdev *mcan_class = &priv->cdev;
 
 	clk_disable_unprepare(mcan_class->cclk);
 	clk_disable_unprepare(mcan_class->hclk);
@@ -164,8 +166,8 @@ static int __maybe_unused m_can_runtime_suspend(struct device *dev)
 
 static int __maybe_unused m_can_runtime_resume(struct device *dev)
 {
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct m_can_classdev *mcan_class = netdev_priv(ndev);
+	struct m_can_plat_priv *priv = dev_get_drvdata(dev);
+	struct m_can_classdev *mcan_class = &priv->cdev;
 	int err;
 
 	err = clk_prepare_enable(mcan_class->hclk);
diff --git a/drivers/net/can/m_can/tcan4x5x.c b/drivers/net/can/m_can/tcan4x5x.c
index a0fecc3fb829..24c737c4fc44 100644
--- a/drivers/net/can/m_can/tcan4x5x.c
+++ b/drivers/net/can/m_can/tcan4x5x.c
@@ -114,17 +114,23 @@
 #define TCAN4X5X_WD_6_S_TIMER (BIT(28) | BIT(29))
 
 struct tcan4x5x_priv {
+	struct m_can_classdev cdev;
+
 	struct regmap *regmap;
 	struct spi_device *spi;
 
-	struct m_can_classdev *mcan_dev;
-
 	struct gpio_desc *reset_gpio;
 	struct gpio_desc *device_wake_gpio;
 	struct gpio_desc *device_state_gpio;
 	struct regulator *power;
 };
 
+static inline struct tcan4x5x_priv *cdev_to_priv(struct m_can_classdev *cdev)
+{
+	return container_of(cdev, struct tcan4x5x_priv, cdev);
+
+}
+
 static struct can_bittiming_const tcan4x5x_bittiming_const = {
 	.name = DEVICE_NAME,
 	.tseg1_min = 2,
@@ -253,7 +259,7 @@ static struct regmap_bus tcan4x5x_bus = {
 
 static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg)
 {
-	struct tcan4x5x_priv *priv = cdev->device_data;
+	struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
 	u32 val;
 
 	regmap_read(priv->regmap, TCAN4X5X_MCAN_OFFSET + reg, &val);
@@ -263,7 +269,7 @@ static u32 tcan4x5x_read_reg(struct m_can_classdev *cdev, int reg)
 
 static u32 tcan4x5x_read_fifo(struct m_can_classdev *cdev, int addr_offset)
 {
-	struct tcan4x5x_priv *priv = cdev->device_data;
+	struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
 	u32 val;
 
 	regmap_read(priv->regmap, TCAN4X5X_MRAM_START + addr_offset, &val);
@@ -273,7 +279,7 @@ static u32 tcan4x5x_read_fifo(struct m_can_classdev *cdev, int addr_offset)
 
 static int tcan4x5x_write_reg(struct m_can_classdev *cdev, int reg, int val)
 {
-	struct tcan4x5x_priv *priv = cdev->device_data;
+	struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
 
 	return regmap_write(priv->regmap, TCAN4X5X_MCAN_OFFSET + reg, val);
 }
@@ -281,7 +287,7 @@ static int tcan4x5x_write_reg(struct m_can_classdev *cdev, int reg, int val)
 static int tcan4x5x_write_fifo(struct m_can_classdev *cdev,
 			       int addr_offset, int val)
 {
-	struct tcan4x5x_priv *priv = cdev->device_data;
+	struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
 
 	return regmap_write(priv->regmap, TCAN4X5X_MRAM_START + addr_offset, val);
 }
@@ -300,7 +306,7 @@ static int tcan4x5x_power_enable(struct regulator *reg, int enable)
 static int tcan4x5x_write_tcan_reg(struct m_can_classdev *cdev,
 				   int reg, int val)
 {
-	struct tcan4x5x_priv *priv = cdev->device_data;
+	struct tcan4x5x_priv *priv = cdev_to_priv(cdev);
 
 	return regmap_write(priv->regmap, reg, val);
 }
@@ -330,7 +336,7 @@ static int tcan4x5x_clear_interrupts(struct m_can_classdev *cdev)
 
 static int tcan4x5x_init(struct m_can_classdev *cdev)
 {
-	struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+	struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
 	int ret;
 
 	tcan4x5x_check_wake(tcan4x5x);
@@ -357,7 +363,7 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
 
 static int tcan4x5x_disable_wake(struct m_can_classdev *cdev)
 {
-	struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+	struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
 
 	return regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
 				  TCAN4X5X_DISABLE_WAKE_MSK, 0x00);
@@ -365,7 +371,7 @@ static int tcan4x5x_disable_wake(struct m_can_classdev *cdev)
 
 static int tcan4x5x_disable_state(struct m_can_classdev *cdev)
 {
-	struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+	struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
 
 	return regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
 				  TCAN4X5X_DISABLE_INH_MSK, 0x01);
@@ -373,7 +379,7 @@ static int tcan4x5x_disable_state(struct m_can_classdev *cdev)
 
 static int tcan4x5x_get_gpios(struct m_can_classdev *cdev)
 {
-	struct tcan4x5x_priv *tcan4x5x = cdev->device_data;
+	struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
 	int ret;
 
 	tcan4x5x->device_wake_gpio = devm_gpiod_get(cdev->dev, "device-wake",
@@ -427,15 +433,12 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
 	struct m_can_classdev *mcan_class;
 	int freq, ret;
 
-	mcan_class = m_can_class_allocate_dev(&spi->dev);
+	mcan_class = m_can_class_allocate_dev(&spi->dev,
+					      sizeof(struct tcan4x5x_priv));
 	if (!mcan_class)
 		return -ENOMEM;
 
-	priv = devm_kzalloc(&spi->dev, sizeof(*priv), GFP_KERNEL);
-	if (!priv) {
-		ret = -ENOMEM;
-		goto out_m_can_class_free_dev;
-	}
+	priv = cdev_to_priv(mcan_class);
 
 	priv->power = devm_regulator_get_optional(&spi->dev, "vsup");
 	if (PTR_ERR(priv->power) == -EPROBE_DEFER) {
@@ -445,8 +448,6 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
 		priv->power = NULL;
 	}
 
-	mcan_class->device_data = priv;
-
 	m_can_class_get_clocks(mcan_class);
 	if (IS_ERR(mcan_class->cclk)) {
 		dev_err(&spi->dev, "no CAN clock source defined\n");
@@ -462,7 +463,6 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
 	}
 
 	priv->spi = spi;
-	priv->mcan_dev = mcan_class;
 
 	mcan_class->pm_clock_support = 0;
 	mcan_class->can.clock.freq = freq;
@@ -518,11 +518,11 @@ static int tcan4x5x_can_remove(struct spi_device *spi)
 {
 	struct tcan4x5x_priv *priv = spi_get_drvdata(spi);
 
-	m_can_class_unregister(priv->mcan_dev);
+	m_can_class_unregister(&priv->cdev);
 
 	tcan4x5x_power_enable(priv->power, 0);
 
-	m_can_class_free_dev(priv->mcan_dev->net);
+	m_can_class_free_dev(priv->cdev.net);
 
 	return 0;
 }