can: at91_can: add dt support
Add device tree support.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 44f3637..db52f441 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -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 @@
canid_t mb0_id;
};
-static const struct at91_devtype_data at91_devtype_data[] = {
- [AT91_DEVTYPE_SAM9263] = {
- .rx_first = 1,
- .rx_split = 8,
- .rx_last = 11,
- .tx_shift = 2,
- },
- [AT91_DEVTYPE_SAM9X5] = {
- .rx_first = 0,
- .rx_split = 4,
- .rx_last = 5,
- .tx_shift = 1,
- },
+static const struct at91_devtype_data at91_at91sam9263_data = {
+ .rx_first = 1,
+ .rx_split = 8,
+ .rx_last = 11,
+ .tx_shift = 2,
+ .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 @@
.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 @@
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 @@
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 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 @@
.driver = {
.name = KBUILD_MODNAME,
.owner = THIS_MODULE,
+ .of_match_table = at91_can_dt_ids,
},
.id_table = at91_can_id_table,
};