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stmmac: Add an optional device tree property "snps,burst_len" 

This property define the AXI bug lenth.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sonic Zhang 2015-01-22 14:55:58 +08:00 committed by David S. Miller
parent dec2165ff3
commit fa067467d8
2 changed files with 4 additions and 0 deletions
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1
Documentation/devicetree/bindings/net/stmmac.txt
View File

@ -43,6 +43,7 @@ Optional properties:
available this clock is used for programming the Timestamp Addend Register.
If not passed then the system clock will be used and this is fine on some
platforms.
- snps,burst_len: The AXI burst lenth value of the AXI BUS MODE register.
Examples:

3
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View File

@ -235,6 +235,9 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
of_property_read_bool(np, "snps,fixed-burst");
dma_cfg->mixed_burst =
of_property_read_bool(np, "snps,mixed-burst");
of_property_read_u32(np, "snps,burst_len", &dma_cfg->burst_len);
if (dma_cfg->burst_len < 0 || dma_cfg->burst_len > 256)
dma_cfg->burst_len = 0;
}
plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
if (plat->force_thresh_dma_mode) {