diff options
| author | Dominik Sliwa <dominik.sliwa@toradex.com> | 2018-01-31 17:43:22 +0100 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2018-03-28 18:11:50 +0200 |
| commit | e57a938d023cdf933731a77a350cfacadc37d3c4 (patch) | |
| tree | a6c6ce33fd8c131af6207a7c928de9502b0087ea /drivers/net/can/apalis-tk1-k20-can.c | |
| parent | 877a32308600b065f376f8cf41e1bf9093aff64f (diff) | |
can: mfd: apalis-tk1-k20:increased clock speed, zero copy
Increased SPI speed for transfers and peripheral speed.
Switch to cleaning IRQ flags on read, instead of separate write.
Switched to zero-copy on SPI reads.
Signed-off-by: Dominik Sliwa <dominik.sliwa@toradex.com>
Acked-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Diffstat (limited to 'drivers/net/can/apalis-tk1-k20-can.c')
| -rw-r--r-- | drivers/net/can/apalis-tk1-k20-can.c | 31 |
1 files changed, 2 insertions, 29 deletions
diff --git a/drivers/net/can/apalis-tk1-k20-can.c b/drivers/net/can/apalis-tk1-k20-can.c index 22437c48296f..5d0f5d764ceb 100644 --- a/drivers/net/can/apalis-tk1-k20-can.c +++ b/drivers/net/can/apalis-tk1-k20-can.c @@ -155,30 +155,11 @@ static void apalis_tk1_k20_can_hw_rx_frame(struct net_device *net, u8 *buf, apalis_tk1_k20_unlock(priv->apalis_tk1_k20); } -static u32 apalis_tk1_k20_can_available_rx_frames(struct net_device *net) -{ - u32 frame_cnt = 0; - struct apalis_tk1_k20_priv *priv = netdev_priv(net); - int ret; - - apalis_tk1_k20_lock(priv->apalis_tk1_k20); - - ret = apalis_tk1_k20_reg_read(priv->apalis_tk1_k20, - APALIS_TK1_K20_CAN_IN_BUF_CNT - + APALIS_TK1_K20_CAN_DEV_OFFSET( - priv->pdata->id), &frame_cnt); - apalis_tk1_k20_unlock(priv->apalis_tk1_k20); - - return (ret == 0) ? frame_cnt : 0; -} - static void apalis_tk1_k20_can_hw_rx(struct net_device *net, int buf_idx) { struct apalis_tk1_k20_priv *priv = netdev_priv(net); struct sk_buff *skb; struct can_frame *frame; - u8 available_frames = 0; - u8 buf[CAN_TRANSFER_BUF_LEN]; skb = alloc_can_skb(priv->net, &frame); if (!skb) { @@ -187,14 +168,7 @@ static void apalis_tk1_k20_can_hw_rx(struct net_device *net, int buf_idx) return; } - available_frames = apalis_tk1_k20_can_available_rx_frames(net); - - while ((available_frames > 0)) { - apalis_tk1_k20_can_hw_rx_frame(net, buf, buf_idx); - memcpy(&frame->can_id, buf + MB_EID_OFF, MB_EID_LEN); - /* Data length */ - frame->can_dlc = get_can_dlc(buf[MB_DLC_OFF]); - memcpy(frame->data, buf + CAN_HEADER_MAX_LEN, frame->can_dlc); + apalis_tk1_k20_can_hw_rx_frame(net, (unsigned char *)frame, buf_idx); priv->net->stats.rx_packets++; priv->net->stats.rx_bytes += frame->can_dlc; @@ -202,8 +176,7 @@ static void apalis_tk1_k20_can_hw_rx(struct net_device *net, int buf_idx) can_led_event(priv->net, CAN_LED_EVENT_RX); netif_rx_ni(skb); - available_frames--; - } + } static netdev_tx_t apalis_tk1_k20_can_hard_start_xmit(struct sk_buff *skb, |