can: at91_can: add dt support (3078cde7) · Commits · e / devices / android_kernel_fairphone_FP3

Documentation/devicetree/bindings/net/can/atmel-can.txt

0 → 100644

+14 −0

Original line number	Diff line number	Diff line
		* AT91 CAN *

		Required properties:
		- compatible: Should be "atmel,at91sam9263-can" or "atmel,at91sam9x5-can"
		- reg: Should contain CAN controller registers location and length
		- interrupts: Should contain IRQ line for the CAN controller

		Example:

		can0: can@f000c000 {
		compatbile = "atmel,at91sam9x5-can";
		reg = <0xf000c000 0x300>;
		interrupts = <40 4 5>
		};

drivers/net/can/at91_can.c

+57 −19

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/netdevice.h>
		#include <linux/of.h>
		#include <linux/platform_device.h>
		#include <linux/rtnetlink.h>
		#include <linux/skbuff.h>
		@@ -155,19 +156,20 @@ struct at91_priv {
		canid_t mb0_id;
		};

		static const struct at91_devtype_data at91_devtype_data[] = {
		[AT91_DEVTYPE_SAM9263] = {
		static const struct at91_devtype_data at91_at91sam9263_data = {
		.rx_first = 1,
		.rx_split = 8,
		.rx_last = 11,
		.tx_shift = 2,
		},
		[AT91_DEVTYPE_SAM9X5] = {
		.type = AT91_DEVTYPE_SAM9263,
		};

		static const struct at91_devtype_data at91_at91sam9x5_data = {
		.rx_first = 0,
		.rx_split = 4,
		.rx_last = 5,
		.tx_shift = 1,
		},
		.type = AT91_DEVTYPE_SAM9X5,
		};

		static const struct can_bittiming_const at91_bittiming_const = {
		@@ -1249,10 +1251,42 @@ static struct attribute_group at91_sysfs_attr_group = {
		.attrs = at91_sysfs_attrs,
		};

		#if defined(CONFIG_OF)
		static const struct of_device_id at91_can_dt_ids[] = {
		{
		.compatible = "atmel,at91sam9x5-can",
		.data = &at91_at91sam9x5_data,
		}, {
		.compatible = "atmel,at91sam9263-can",
		.data = &at91_at91sam9263_data,
		}, {
		/* sentinel */
		}
		};
		MODULE_DEVICE_TABLE(of, at91_can_dt_ids);
		#else
		#define at91_can_dt_ids NULL
		#endif

		static const struct at91_devtype_data at91_can_get_driver_data(struct platform_device pdev)
		{
		if (pdev->dev.of_node) {
		const struct of_device_id *match;

		match = of_match_node(at91_can_dt_ids, pdev->dev.of_node);
		if (!match) {
		dev_err(&pdev->dev, "no matching node found in dtb\n");
		return NULL;
		}
		return (const struct at91_devtype_data *)match->data;
		}
		return (const struct at91_devtype_data *)
		platform_get_device_id(pdev)->driver_data;
		}

		static int at91_can_probe(struct platform_device *pdev)
		{
		const struct at91_devtype_data *devtype_data;
		enum at91_devtype devtype;
		struct net_device *dev;
		struct at91_priv *priv;
		struct resource *res;
		@@ -1260,8 +1294,12 @@ static int at91_can_probe(struct platform_device *pdev)
		void __iomem *addr;
		int err, irq;

		devtype = pdev->id_entry->driver_data;
		devtype_data = &at91_devtype_data[devtype];
		devtype_data = at91_can_get_driver_data(pdev);
		if (!devtype_data) {
		dev_err(&pdev->dev, "no driver data\n");
		err = -ENODEV;
		goto exit;
		}

		clk = clk_get(&pdev->dev, "can_clk");
		if (IS_ERR(clk)) {
		@@ -1310,7 +1348,6 @@ static int at91_can_probe(struct platform_device *pdev)
		priv->dev = dev;
		priv->reg_base = addr;
		priv->devtype_data = *devtype_data;
		priv->devtype_data.type = devtype;
		priv->clk = clk;
		priv->pdata = pdev->dev.platform_data;
		priv->mb0_id = 0x7ff;
		@@ -1373,10 +1410,10 @@ static int at91_can_remove(struct platform_device *pdev)
		static const struct platform_device_id at91_can_id_table[] = {
		{
		.name = "at91_can",
		.driver_data = AT91_DEVTYPE_SAM9263,
		.driver_data = (kernel_ulong_t)&at91_at91sam9x5_data,
		}, {
		.name = "at91sam9x5_can",
		.driver_data = AT91_DEVTYPE_SAM9X5,
		.driver_data = (kernel_ulong_t)&at91_at91sam9263_data,
		}, {
		/* sentinel */
		}
		@@ -1389,6 +1426,7 @@ static struct platform_driver at91_can_driver = {
		.driver = {
		.name = KBUILD_MODNAME,
		.owner = THIS_MODULE,
		.of_match_table = at91_can_dt_ids,
		},
		.id_table = at91_can_id_table,
		};