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74 lines
2.2 KiB
Diff
74 lines
2.2 KiB
Diff
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From 7e553c44f09a8f536090904c6db5b8c9dbafa03b Mon Sep 17 00:00:00 2001
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From: Aleksander Jan Bajkowski <olek2@wp.pl>
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Date: Tue, 26 Oct 2021 22:59:01 +0200
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Subject: [PATCH] net: lantiq_xrx200: Hardcode the burst length value
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All SoCs with this IP core support 8 burst length. Hauke
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suggested to hardcode this value and simplify the driver.
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Link: https://lkml.org/lkml/2021/9/14/1533
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Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/lantiq_xrx200.c | 21 ++++-----------------
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1 file changed, 4 insertions(+), 17 deletions(-)
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--- a/drivers/net/ethernet/lantiq_xrx200.c
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+++ b/drivers/net/ethernet/lantiq_xrx200.c
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@@ -23,6 +23,7 @@
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#define XRX200_DMA_DATA_LEN 0x600
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#define XRX200_DMA_RX 0
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#define XRX200_DMA_TX 1
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+#define XRX200_DMA_BURST_LEN 8
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/* cpu port mac */
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#define PMAC_RX_IPG 0x0024
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@@ -71,9 +72,6 @@ struct xrx200_priv {
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struct net_device *net_dev;
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struct device *dev;
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- int tx_burst_len;
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- int rx_burst_len;
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-
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__iomem void *pmac_reg;
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};
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@@ -320,7 +318,7 @@ static netdev_tx_t xrx200_start_xmit(str
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goto err_drop;
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/* dma needs to start on a burst length value aligned address */
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- byte_offset = mapping % (priv->tx_burst_len * 4);
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+ byte_offset = mapping % (XRX200_DMA_BURST_LEN * 4);
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desc->addr = mapping - byte_offset;
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/* Make sure the address is written before we give it to HW */
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@@ -372,7 +370,8 @@ static int xrx200_dma_init(struct xrx200
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int ret = 0;
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int i;
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- ltq_dma_init_port(DMA_PORT_ETOP, priv->tx_burst_len, rx_burst_len);
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+ ltq_dma_init_port(DMA_PORT_ETOP, XRX200_DMA_BURST_LEN,
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+ XRX200_DMA_BURST_LEN);
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ch_rx->dma.nr = XRX200_DMA_RX;
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ch_rx->dma.dev = priv->dev;
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@@ -490,18 +489,6 @@ static int xrx200_probe(struct platform_
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if (err)
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eth_hw_addr_random(net_dev);
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- err = device_property_read_u32(dev, "lantiq,tx-burst-length", &priv->tx_burst_len);
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- if (err < 0) {
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- dev_err(dev, "unable to read tx-burst-length property\n");
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- return err;
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- }
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-
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- err = device_property_read_u32(dev, "lantiq,rx-burst-length", &priv->rx_burst_len);
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- if (err < 0) {
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- dev_err(dev, "unable to read rx-burst-length property\n");
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- return err;
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- }
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-
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/* bring up the dma engine and IP core */
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err = xrx200_dma_init(priv);
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if (err)
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