Merge tag 'linux-can-fixes-for-5.18-20220514' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2022-05-14

this is a pull request of 2 patches for net/master.

Changes to linux-can-fixes-for-5.18-20220513:
- adjusted Fixes: Tag on "Revert "can: m_can: pci: use custom bit timings for Elkhart Lake""
  (Thanks Jakub)

Both patches are by Jarkko Nikula, target the m_can PCI driver
bindings, and fix usage of wrong bit timing constants for the Elkhart
Lake platform.
====================

Signed-off-by: David S. Miller <[email protected]>

Author: davem330

drivers/net/can/m_can/m_can.c

@@ -1495,34 +1495,22 @@ static int m_can_dev_setup(struct m_can_classdev *cdev)
 		err = can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO);
 		if (err)
 			return err;
-		cdev->can.bittiming_const = cdev->bit_timing ?
-			cdev->bit_timing : &m_can_bittiming_const_30X;
-
-		cdev->can.data_bittiming_const = cdev->data_timing ?
-			cdev->data_timing :
-			&m_can_data_bittiming_const_30X;
+		cdev->can.bittiming_const = &m_can_bittiming_const_30X;
+		cdev->can.data_bittiming_const = &m_can_data_bittiming_const_30X;
 		break;
 	case 31:
 		/* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.1.x */
 		err = can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO);
 		if (err)
 			return err;
-		cdev->can.bittiming_const = cdev->bit_timing ?
-			cdev->bit_timing : &m_can_bittiming_const_31X;
-
-		cdev->can.data_bittiming_const = cdev->data_timing ?
-			cdev->data_timing :
-			&m_can_data_bittiming_const_31X;
+		cdev->can.bittiming_const = &m_can_bittiming_const_31X;
+		cdev->can.data_bittiming_const = &m_can_data_bittiming_const_31X;
 		break;
 	case 32:
 	case 33:
 		/* Support both MCAN version v3.2.x and v3.3.0 */
-		cdev->can.bittiming_const = cdev->bit_timing ?
-			cdev->bit_timing : &m_can_bittiming_const_31X;
-
-		cdev->can.data_bittiming_const = cdev->data_timing ?
-			cdev->data_timing :
-			&m_can_data_bittiming_const_31X;
+		cdev->can.bittiming_const = &m_can_bittiming_const_31X;
+		cdev->can.data_bittiming_const = &m_can_data_bittiming_const_31X;
 
 		cdev->can.ctrlmode_supported |=
 			(m_can_niso_supported(cdev) ?

drivers/net/can/m_can/m_can.h

@@ -85,9 +85,6 @@ struct m_can_classdev {
 	struct sk_buff *tx_skb;
 	struct phy *transceiver;
 
-	const struct can_bittiming_const *bit_timing;
-	const struct can_bittiming_const *data_timing;
-
 	struct m_can_ops *ops;
 
 	int version;

drivers/net/can/m_can/m_can_pci.c

@@ -18,14 +18,9 @@
 
 #define M_CAN_PCI_MMIO_BAR		0
 
+#define M_CAN_CLOCK_FREQ_EHL		200000000
 #define CTL_CSR_INT_CTL_OFFSET		0x508
 
-struct m_can_pci_config {
-	const struct can_bittiming_const *bit_timing;
-	const struct can_bittiming_const *data_timing;
-	unsigned int clock_freq;
-};
-
 struct m_can_pci_priv {
 	struct m_can_classdev cdev;
 
@@ -89,40 +84,9 @@ static struct m_can_ops m_can_pci_ops = {
 	.read_fifo = iomap_read_fifo,
 };
 
-static const struct can_bittiming_const m_can_bittiming_const_ehl = {
-	.name = KBUILD_MODNAME,
-	.tseg1_min = 2,		/* Time segment 1 = prop_seg + phase_seg1 */
-	.tseg1_max = 64,
-	.tseg2_min = 1,		/* Time segment 2 = phase_seg2 */
-	.tseg2_max = 128,
-	.sjw_max = 128,
-	.brp_min = 1,
-	.brp_max = 512,
-	.brp_inc = 1,
-};
-
-static const struct can_bittiming_const m_can_data_bittiming_const_ehl = {
-	.name = KBUILD_MODNAME,
-	.tseg1_min = 2,		/* Time segment 1 = prop_seg + phase_seg1 */
-	.tseg1_max = 16,
-	.tseg2_min = 1,		/* Time segment 2 = phase_seg2 */
-	.tseg2_max = 8,
-	.sjw_max = 4,
-	.brp_min = 1,
-	.brp_max = 32,
-	.brp_inc = 1,
-};
-
-static const struct m_can_pci_config m_can_pci_ehl = {
-	.bit_timing = &m_can_bittiming_const_ehl,
-	.data_timing = &m_can_data_bittiming_const_ehl,
-	.clock_freq = 200000000,
-};
-
 static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 {
 	struct device *dev = &pci->dev;
-	const struct m_can_pci_config *cfg;
 	struct m_can_classdev *mcan_class;
 	struct m_can_pci_priv *priv;
 	void __iomem *base;
@@ -150,8 +114,6 @@ static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 	if (!mcan_class)
 		return -ENOMEM;
 
-	cfg = (const struct m_can_pci_config *)id->driver_data;
-
 	priv = cdev_to_priv(mcan_class);
 
 	priv->base = base;
@@ -163,9 +125,7 @@ static int m_can_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
 	mcan_class->dev = &pci->dev;
 	mcan_class->net->irq = pci_irq_vector(pci, 0);
 	mcan_class->pm_clock_support = 1;
-	mcan_class->bit_timing = cfg->bit_timing;
-	mcan_class->data_timing = cfg->data_timing;
-	mcan_class->can.clock.freq = cfg->clock_freq;
+	mcan_class->can.clock.freq = id->driver_data;
 	mcan_class->ops = &m_can_pci_ops;
 
 	pci_set_drvdata(pci, mcan_class);
@@ -218,8 +178,8 @@ static SIMPLE_DEV_PM_OPS(m_can_pci_pm_ops,
 			 m_can_pci_suspend, m_can_pci_resume);
 
 static const struct pci_device_id m_can_pci_id_table[] = {
-	{ PCI_VDEVICE(INTEL, 0x4bc1), (kernel_ulong_t)&m_can_pci_ehl, },
-	{ PCI_VDEVICE(INTEL, 0x4bc2), (kernel_ulong_t)&m_can_pci_ehl, },
+	{ PCI_VDEVICE(INTEL, 0x4bc1), M_CAN_CLOCK_FREQ_EHL, },
+	{ PCI_VDEVICE(INTEL, 0x4bc2), M_CAN_CLOCK_FREQ_EHL, },
 	{  }	/* Terminating Entry */
 };
 MODULE_DEVICE_TABLE(pci, m_can_pci_id_table);