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path: root/drivers/net/can/at91_can.c
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Diffstat (limited to 'drivers/net/can/at91_can.c')
-rw-r--r--drivers/net/can/at91_can.c199
1 files changed, 90 insertions, 109 deletions
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 9df2007b5e56..199cb200f2bd 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -8,6 +8,7 @@
#include <linux/clk.h>
#include <linux/errno.h>
+#include <linux/ethtool.h>
#include <linux/if_arp.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -23,7 +24,6 @@
#include <linux/can/dev.h>
#include <linux/can/error.h>
-#include <linux/can/led.h>
#define AT91_MB_MASK(i) ((1 << (i)) - 1)
@@ -43,14 +43,14 @@ enum at91_reg {
};
/* Mailbox registers (0 <= i <= 15) */
-#define AT91_MMR(i) (enum at91_reg)(0x200 + ((i) * 0x20))
-#define AT91_MAM(i) (enum at91_reg)(0x204 + ((i) * 0x20))
-#define AT91_MID(i) (enum at91_reg)(0x208 + ((i) * 0x20))
-#define AT91_MFID(i) (enum at91_reg)(0x20C + ((i) * 0x20))
-#define AT91_MSR(i) (enum at91_reg)(0x210 + ((i) * 0x20))
-#define AT91_MDL(i) (enum at91_reg)(0x214 + ((i) * 0x20))
-#define AT91_MDH(i) (enum at91_reg)(0x218 + ((i) * 0x20))
-#define AT91_MCR(i) (enum at91_reg)(0x21C + ((i) * 0x20))
+#define AT91_MMR(i) ((enum at91_reg)(0x200 + ((i) * 0x20)))
+#define AT91_MAM(i) ((enum at91_reg)(0x204 + ((i) * 0x20)))
+#define AT91_MID(i) ((enum at91_reg)(0x208 + ((i) * 0x20)))
+#define AT91_MFID(i) ((enum at91_reg)(0x20C + ((i) * 0x20)))
+#define AT91_MSR(i) ((enum at91_reg)(0x210 + ((i) * 0x20)))
+#define AT91_MDL(i) ((enum at91_reg)(0x214 + ((i) * 0x20)))
+#define AT91_MDH(i) ((enum at91_reg)(0x218 + ((i) * 0x20)))
+#define AT91_MCR(i) ((enum at91_reg)(0x21C + ((i) * 0x20)))
/* Register bits */
#define AT91_MR_CANEN BIT(0)
@@ -87,19 +87,19 @@ enum at91_mb_mode {
};
/* Interrupt mask bits */
-#define AT91_IRQ_ERRA (1 << 16)
-#define AT91_IRQ_WARN (1 << 17)
-#define AT91_IRQ_ERRP (1 << 18)
-#define AT91_IRQ_BOFF (1 << 19)
-#define AT91_IRQ_SLEEP (1 << 20)
-#define AT91_IRQ_WAKEUP (1 << 21)
-#define AT91_IRQ_TOVF (1 << 22)
-#define AT91_IRQ_TSTP (1 << 23)
-#define AT91_IRQ_CERR (1 << 24)
-#define AT91_IRQ_SERR (1 << 25)
-#define AT91_IRQ_AERR (1 << 26)
-#define AT91_IRQ_FERR (1 << 27)
-#define AT91_IRQ_BERR (1 << 28)
+#define AT91_IRQ_ERRA BIT(16)
+#define AT91_IRQ_WARN BIT(17)
+#define AT91_IRQ_ERRP BIT(18)
+#define AT91_IRQ_BOFF BIT(19)
+#define AT91_IRQ_SLEEP BIT(20)
+#define AT91_IRQ_WAKEUP BIT(21)
+#define AT91_IRQ_TOVF BIT(22)
+#define AT91_IRQ_TSTP BIT(23)
+#define AT91_IRQ_CERR BIT(24)
+#define AT91_IRQ_SERR BIT(25)
+#define AT91_IRQ_AERR BIT(26)
+#define AT91_IRQ_FERR BIT(27)
+#define AT91_IRQ_BERR BIT(28)
#define AT91_IRQ_ERR_ALL (0x1fff0000)
#define AT91_IRQ_ERR_FRAME (AT91_IRQ_CERR | AT91_IRQ_SERR | \
@@ -163,13 +163,13 @@ static const struct can_bittiming_const at91_bittiming_const = {
.tseg2_min = 2,
.tseg2_max = 8,
.sjw_max = 4,
- .brp_min = 2,
+ .brp_min = 2,
.brp_max = 128,
.brp_inc = 1,
};
#define AT91_IS(_model) \
-static inline int at91_is_sam##_model(const struct at91_priv *priv) \
+static inline int __maybe_unused at91_is_sam##_model(const struct at91_priv *priv) \
{ \
return priv->devtype_data.type == AT91_DEVTYPE_SAM##_model; \
}
@@ -281,19 +281,20 @@ static inline u32 at91_read(const struct at91_priv *priv, enum at91_reg reg)
}
static inline void at91_write(const struct at91_priv *priv, enum at91_reg reg,
- u32 value)
+ u32 value)
{
writel_relaxed(value, priv->reg_base + reg);
}
static inline void set_mb_mode_prio(const struct at91_priv *priv,
- unsigned int mb, enum at91_mb_mode mode, int prio)
+ unsigned int mb, enum at91_mb_mode mode,
+ int prio)
{
at91_write(priv, AT91_MMR(mb), (mode << 24) | (prio << 16));
}
static inline void set_mb_mode(const struct at91_priv *priv, unsigned int mb,
- enum at91_mb_mode mode)
+ enum at91_mb_mode mode)
{
set_mb_mode_prio(priv, mb, mode, 0);
}
@@ -316,8 +317,7 @@ static void at91_setup_mailboxes(struct net_device *dev)
unsigned int i;
u32 reg_mid;
- /*
- * Due to a chip bug (errata 50.2.6.3 & 50.3.5.3) the first
+ /* Due to a chip bug (errata 50.2.6.3 & 50.3.5.3) the first
* mailbox is disabled. The next 11 mailboxes are used as a
* reception FIFO. The last mailbox is configured with
* overwrite option. The overwrite flag indicates a FIFO
@@ -368,7 +368,7 @@ static int at91_set_bittiming(struct net_device *dev)
}
static int at91_get_berr_counter(const struct net_device *dev,
- struct can_berr_counter *bec)
+ struct can_berr_counter *bec)
{
const struct at91_priv *priv = netdev_priv(dev);
u32 reg_ecr = at91_read(priv, AT91_ECR);
@@ -423,8 +423,7 @@ static void at91_chip_stop(struct net_device *dev, enum can_state state)
priv->can.state = state;
}
-/*
- * theory of operation:
+/* theory of operation:
*
* According to the datasheet priority 0 is the highest priority, 15
* is the lowest. If two mailboxes have the same priority level the
@@ -449,12 +448,11 @@ static void at91_chip_stop(struct net_device *dev, enum can_state state)
static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct at91_priv *priv = netdev_priv(dev);
- struct net_device_stats *stats = &dev->stats;
struct can_frame *cf = (struct can_frame *)skb->data;
unsigned int mb, prio;
u32 reg_mid, reg_mcr;
- if (can_dropped_invalid_skb(dev, skb))
+ if (can_dev_dropped_skb(dev, skb))
return NETDEV_TX_OK;
mb = get_tx_next_mb(priv);
@@ -468,7 +466,7 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
}
reg_mid = at91_can_id_to_reg_mid(cf->can_id);
reg_mcr = ((cf->can_id & CAN_RTR_FLAG) ? AT91_MCR_MRTR : 0) |
- (cf->can_dlc << 16) | AT91_MCR_MTCR;
+ (cf->len << 16) | AT91_MCR_MTCR;
/* disable MB while writing ID (see datasheet) */
set_mb_mode(priv, mb, AT91_MB_MODE_DISABLED);
@@ -481,13 +479,10 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* This triggers transmission */
at91_write(priv, AT91_MCR(mb), reg_mcr);
- stats->tx_bytes += cf->can_dlc;
-
/* _NOTE_: subtract AT91_MB_TX_FIRST offset from mb! */
- can_put_echo_skb(skb, dev, mb - get_mb_tx_first(priv));
+ can_put_echo_skb(skb, dev, mb - get_mb_tx_first(priv), 0);
- /*
- * we have to stop the queue and deliver all messages in case
+ /* we have to stop the queue and deliver all messages in case
* of a prio+mb counter wrap around. This is the case if
* tx_next buffer prio and mailbox equals 0.
*
@@ -515,6 +510,7 @@ static netdev_tx_t at91_start_xmit(struct sk_buff *skb, struct net_device *dev)
static inline void at91_activate_rx_low(const struct at91_priv *priv)
{
u32 mask = get_mb_rx_low_mask(priv);
+
at91_write(priv, AT91_TCR, mask);
}
@@ -526,9 +522,10 @@ static inline void at91_activate_rx_low(const struct at91_priv *priv)
* Reenables given mailbox for reception of new CAN messages
*/
static inline void at91_activate_rx_mb(const struct at91_priv *priv,
- unsigned int mb)
+ unsigned int mb)
{
u32 mask = 1 << mb;
+
at91_write(priv, AT91_TCR, mask);
}
@@ -553,8 +550,6 @@ static void at91_rx_overflow_err(struct net_device *dev)
cf->can_id |= CAN_ERR_CRTL;
cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
- stats->rx_packets++;
- stats->rx_bytes += cf->can_dlc;
netif_receive_skb(skb);
}
@@ -568,7 +563,7 @@ static void at91_rx_overflow_err(struct net_device *dev)
* given can frame. "mb" and "cf" must be valid.
*/
static void at91_read_mb(struct net_device *dev, unsigned int mb,
- struct can_frame *cf)
+ struct can_frame *cf)
{
const struct at91_priv *priv = netdev_priv(dev);
u32 reg_msr, reg_mid;
@@ -580,11 +575,11 @@ static void at91_read_mb(struct net_device *dev, unsigned int mb,
cf->can_id = (reg_mid >> 18) & CAN_SFF_MASK;
reg_msr = at91_read(priv, AT91_MSR(mb));
- cf->can_dlc = get_can_dlc((reg_msr >> 16) & 0xf);
+ cf->len = can_cc_dlc2len((reg_msr >> 16) & 0xf);
- if (reg_msr & AT91_MSR_MRTR)
+ if (reg_msr & AT91_MSR_MRTR) {
cf->can_id |= CAN_RTR_FLAG;
- else {
+ } else {
*(u32 *)(cf->data + 0) = at91_read(priv, AT91_MDL(mb));
*(u32 *)(cf->data + 4) = at91_read(priv, AT91_MDH(mb));
}
@@ -619,10 +614,10 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb)
at91_read_mb(dev, mb, cf);
stats->rx_packets++;
- stats->rx_bytes += cf->can_dlc;
- netif_receive_skb(skb);
+ if (!(cf->can_id & CAN_RTR_FLAG))
+ stats->rx_bytes += cf->len;
- can_led_event(dev, CAN_LED_EVENT_RX);
+ netif_receive_skb(skb);
}
/**
@@ -643,7 +638,7 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb)
*
* The first message goes into mb nr. 1 and issues an interrupt. All
* rx ints are disabled in the interrupt handler and a napi poll is
- * scheduled. We read the mailbox, but do _not_ reenable the mb (to
+ * scheduled. We read the mailbox, but do _not_ re-enable the mb (to
* receive another message).
*
* lower mbxs upper
@@ -661,13 +656,13 @@ static void at91_read_msg(struct net_device *dev, unsigned int mb)
*
* The variable priv->rx_next points to the next mailbox to read a
* message from. As long we're in the lower mailboxes we just read the
- * mailbox but not reenable it.
+ * mailbox but not re-enable it.
*
- * With completion of the last of the lower mailboxes, we reenable the
+ * With completion of the last of the lower mailboxes, we re-enable the
* whole first group, but continue to look for filled mailboxes in the
* upper mailboxes. Imagine the second group like overflow mailboxes,
* which takes CAN messages if the lower goup is full. While in the
- * upper group we reenable the mailbox right after reading it. Giving
+ * upper group we re-enable the mailbox right after reading it. Giving
* the chip more room to store messages.
*
* After finishing we look again in the lower group if we've still
@@ -685,7 +680,7 @@ static int at91_poll_rx(struct net_device *dev, int quota)
if (priv->rx_next > get_mb_rx_low_last(priv) &&
reg_sr & get_mb_rx_low_mask(priv))
netdev_info(dev,
- "order of incoming frames cannot be guaranteed\n");
+ "order of incoming frames cannot be guaranteed\n");
again:
for (mb = find_next_bit(addr, get_mb_tx_first(priv), priv->rx_next);
@@ -718,7 +713,7 @@ static int at91_poll_rx(struct net_device *dev, int quota)
}
static void at91_poll_err_frame(struct net_device *dev,
- struct can_frame *cf, u32 reg_sr)
+ struct can_frame *cf, u32 reg_sr)
{
struct at91_priv *priv = netdev_priv(dev);
@@ -779,8 +774,6 @@ static int at91_poll_err(struct net_device *dev, int quota, u32 reg_sr)
at91_poll_err_frame(dev, cf, reg_sr);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += cf->can_dlc;
netif_receive_skb(skb);
return 1;
@@ -796,8 +789,7 @@ static int at91_poll(struct napi_struct *napi, int quota)
if (reg_sr & get_irq_mb_rx(priv))
work_done += at91_poll_rx(dev, quota - work_done);
- /*
- * The error bits are clear on read,
+ /* The error bits are clear on read,
* so use saved value from irq handler.
*/
reg_sr |= priv->reg_sr;
@@ -807,6 +799,7 @@ static int at91_poll(struct napi_struct *napi, int quota)
if (work_done < quota) {
/* enable IRQs for frame errors and all mailboxes >= rx_next */
u32 reg_ier = AT91_IRQ_ERR_FRAME;
+
reg_ier |= get_irq_mb_rx(priv) & ~AT91_MB_MASK(priv->rx_next);
napi_complete_done(napi, work_done);
@@ -816,8 +809,7 @@ static int at91_poll(struct napi_struct *napi, int quota)
return work_done;
}
-/*
- * theory of operation:
+/* theory of operation:
*
* priv->tx_echo holds the number of the oldest can_frame put for
* transmission into the hardware, but not yet ACKed by the CAN tx
@@ -846,8 +838,7 @@ static void at91_irq_tx(struct net_device *dev, u32 reg_sr)
/* Disable irq for this TX mailbox */
at91_write(priv, AT91_IDR, 1 << mb);
- /*
- * only echo if mailbox signals us a transfer
+ /* only echo if mailbox signals us a transfer
* complete (MSR_MRDY). Otherwise it's a tansfer
* abort. "can_bus_off()" takes care about the skbs
* parked in the echo queue.
@@ -856,14 +847,15 @@ static void at91_irq_tx(struct net_device *dev, u32 reg_sr)
if (likely(reg_msr & AT91_MSR_MRDY &&
~reg_msr & AT91_MSR_MABT)) {
/* _NOTE_: subtract AT91_MB_TX_FIRST offset from mb! */
- can_get_echo_skb(dev, mb - get_mb_tx_first(priv));
+ dev->stats.tx_bytes +=
+ can_get_echo_skb(dev,
+ mb - get_mb_tx_first(priv),
+ NULL);
dev->stats.tx_packets++;
- can_led_event(dev, CAN_LED_EVENT_TX);
}
}
- /*
- * restart queue if we don't have a wrap around but restart if
+ /* restart queue if we don't have a wrap around but restart if
* we get a TX int for the last can frame directly before a
* wrap around.
*/
@@ -873,7 +865,7 @@ static void at91_irq_tx(struct net_device *dev, u32 reg_sr)
}
static void at91_irq_err_state(struct net_device *dev,
- struct can_frame *cf, enum can_state new_state)
+ struct can_frame *cf, enum can_state new_state)
{
struct at91_priv *priv = netdev_priv(dev);
u32 reg_idr = 0, reg_ier = 0;
@@ -883,8 +875,7 @@ static void at91_irq_err_state(struct net_device *dev,
switch (priv->can.state) {
case CAN_STATE_ERROR_ACTIVE:
- /*
- * from: ERROR_ACTIVE
+ /* from: ERROR_ACTIVE
* to : ERROR_WARNING, ERROR_PASSIVE, BUS_OFF
* => : there was a warning int
*/
@@ -898,10 +889,9 @@ static void at91_irq_err_state(struct net_device *dev,
CAN_ERR_CRTL_TX_WARNING :
CAN_ERR_CRTL_RX_WARNING;
}
- /* fall through */
+ fallthrough;
case CAN_STATE_ERROR_WARNING:
- /*
- * from: ERROR_ACTIVE, ERROR_WARNING
+ /* from: ERROR_ACTIVE, ERROR_WARNING
* to : ERROR_PASSIVE, BUS_OFF
* => : error passive int
*/
@@ -917,8 +907,7 @@ static void at91_irq_err_state(struct net_device *dev,
}
break;
case CAN_STATE_BUS_OFF:
- /*
- * from: BUS_OFF
+ /* from: BUS_OFF
* to : ERROR_ACTIVE, ERROR_WARNING, ERROR_PASSIVE
*/
if (new_state <= CAN_STATE_ERROR_PASSIVE) {
@@ -935,12 +924,10 @@ static void at91_irq_err_state(struct net_device *dev,
break;
}
-
/* process state changes depending on the new state */
switch (new_state) {
case CAN_STATE_ERROR_ACTIVE:
- /*
- * actually we want to enable AT91_IRQ_WARN here, but
+ /* actually we want to enable AT91_IRQ_WARN here, but
* it screws up the system under certain
* circumstances. so just enable AT91_IRQ_ERRP, thus
* the "fallthrough"
@@ -948,7 +935,7 @@ static void at91_irq_err_state(struct net_device *dev,
netdev_dbg(dev, "Error Active\n");
cf->can_id |= CAN_ERR_PROT;
cf->data[2] = CAN_ERR_PROT_ACTIVE;
- /* fall through */
+ fallthrough;
case CAN_STATE_ERROR_WARNING:
reg_idr = AT91_IRQ_ERRA | AT91_IRQ_WARN | AT91_IRQ_BOFF;
reg_ier = AT91_IRQ_ERRP;
@@ -983,7 +970,7 @@ static void at91_irq_err_state(struct net_device *dev,
}
static int at91_get_state_by_bec(const struct net_device *dev,
- enum can_state *state)
+ enum can_state *state)
{
struct can_berr_counter bec;
int err;
@@ -1004,7 +991,6 @@ static int at91_get_state_by_bec(const struct net_device *dev,
return 0;
}
-
static void at91_irq_err(struct net_device *dev)
{
struct at91_priv *priv = netdev_priv(dev);
@@ -1018,15 +1004,15 @@ static void at91_irq_err(struct net_device *dev)
reg_sr = at91_read(priv, AT91_SR);
/* we need to look at the unmasked reg_sr */
- if (unlikely(reg_sr & AT91_IRQ_BOFF))
+ if (unlikely(reg_sr & AT91_IRQ_BOFF)) {
new_state = CAN_STATE_BUS_OFF;
- else if (unlikely(reg_sr & AT91_IRQ_ERRP))
+ } else if (unlikely(reg_sr & AT91_IRQ_ERRP)) {
new_state = CAN_STATE_ERROR_PASSIVE;
- else if (unlikely(reg_sr & AT91_IRQ_WARN))
+ } else if (unlikely(reg_sr & AT91_IRQ_WARN)) {
new_state = CAN_STATE_ERROR_WARNING;
- else if (likely(reg_sr & AT91_IRQ_ERRA))
+ } else if (likely(reg_sr & AT91_IRQ_ERRA)) {
new_state = CAN_STATE_ERROR_ACTIVE;
- else {
+ } else {
netdev_err(dev, "BUG! hardware in undefined state\n");
return;
}
@@ -1046,15 +1032,12 @@ static void at91_irq_err(struct net_device *dev)
at91_irq_err_state(dev, cf, new_state);
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += cf->can_dlc;
netif_rx(skb);
priv->can.state = new_state;
}
-/*
- * interrupt handler
+/* interrupt handler
*/
static irqreturn_t at91_irq(int irq, void *dev_id)
{
@@ -1075,8 +1058,7 @@ static irqreturn_t at91_irq(int irq, void *dev_id)
/* Receive or error interrupt? -> napi */
if (reg_sr & (get_irq_mb_rx(priv) | AT91_IRQ_ERR_FRAME)) {
- /*
- * The error bits are clear on read,
+ /* The error bits are clear on read,
* save for later use.
*/
priv->reg_sr = reg_sr;
@@ -1116,8 +1098,6 @@ static int at91_open(struct net_device *dev)
goto out_close;
}
- can_led_event(dev, CAN_LED_EVENT_OPEN);
-
/* start chip and queuing */
at91_chip_start(dev);
napi_enable(&priv->napi);
@@ -1133,8 +1113,7 @@ static int at91_open(struct net_device *dev)
return err;
}
-/*
- * stop CAN bus activity
+/* stop CAN bus activity
*/
static int at91_close(struct net_device *dev)
{
@@ -1149,8 +1128,6 @@ static int at91_close(struct net_device *dev)
close_candev(dev);
- can_led_event(dev, CAN_LED_EVENT_STOP);
-
return 0;
}
@@ -1176,19 +1153,24 @@ static const struct net_device_ops at91_netdev_ops = {
.ndo_change_mtu = can_change_mtu,
};
-static ssize_t at91_sysfs_show_mb0_id(struct device *dev,
- struct device_attribute *attr, char *buf)
+static const struct ethtool_ops at91_ethtool_ops = {
+ .get_ts_info = ethtool_op_get_ts_info,
+};
+
+static ssize_t mb0_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
struct at91_priv *priv = netdev_priv(to_net_dev(dev));
if (priv->mb0_id & CAN_EFF_FLAG)
- return snprintf(buf, PAGE_SIZE, "0x%08x\n", priv->mb0_id);
+ return sysfs_emit(buf, "0x%08x\n", priv->mb0_id);
else
- return snprintf(buf, PAGE_SIZE, "0x%03x\n", priv->mb0_id);
+ return sysfs_emit(buf, "0x%03x\n", priv->mb0_id);
}
-static ssize_t at91_sysfs_set_mb0_id(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
+static ssize_t mb0_id_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
{
struct net_device *ndev = to_net_dev(dev);
struct at91_priv *priv = netdev_priv(ndev);
@@ -1222,7 +1204,7 @@ static ssize_t at91_sysfs_set_mb0_id(struct device *dev,
return ret;
}
-static DEVICE_ATTR(mb0_id, 0644, at91_sysfs_show_mb0_id, at91_sysfs_set_mb0_id);
+static DEVICE_ATTR_RW(mb0_id);
static struct attribute *at91_sysfs_attrs[] = {
&dev_attr_mb0_id.attr,
@@ -1316,6 +1298,7 @@ static int at91_can_probe(struct platform_device *pdev)
}
dev->netdev_ops = &at91_netdev_ops;
+ dev->ethtool_ops = &at91_ethtool_ops;
dev->irq = irq;
dev->flags |= IFF_ECHO;
@@ -1332,7 +1315,7 @@ static int at91_can_probe(struct platform_device *pdev)
priv->pdata = dev_get_platdata(&pdev->dev);
priv->mb0_id = 0x7ff;
- netif_napi_add(dev, &priv->napi, at91_poll, get_mb_rx_num(priv));
+ netif_napi_add_weight(dev, &priv->napi, at91_poll, get_mb_rx_num(priv));
if (at91_is_sam9263(priv))
dev->sysfs_groups[0] = &at91_sysfs_attr_group;
@@ -1346,8 +1329,6 @@ static int at91_can_probe(struct platform_device *pdev)
goto exit_free;
}
- devm_can_led_init(dev);
-
dev_info(&pdev->dev, "device registered (reg_base=%p, irq=%d)\n",
priv->reg_base, dev->irq);