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net: stmmac: fixed the pbl setting with DT 

This patch fixed the pbl(programmable burst length) setting
using DT. Even though the default pbl is 8, If there is no
pbl property in device tree file, pbl is set 0 and it causes
bandwidth degradation.

Signed-off-by: Byungho An <bh74.an@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Byungho An 2013-08-24 15:31:43 +09:00 committed by David S. Miller
parent 33c6b1f6b1
commit 64c3b252e9
1 changed files with 12 additions and 8 deletions
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20
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View File

@ -71,14 +71,18 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
plat->force_sf_dma_mode = 1; plat->force_sf_dma_mode = 1;
} }
dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg), GFP_KERNEL); if (of_find_property(np, "snps,pbl", NULL)) {
if (!dma_cfg) dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
return -ENOMEM; GFP_KERNEL);
if (!dma_cfg)
plat->dma_cfg = dma_cfg; return -ENOMEM;
of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); plat->dma_cfg = dma_cfg;
dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst"); of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst"); dma_cfg->fixed_burst =
of_property_read_bool(np, "snps,fixed-burst");
dma_cfg->mixed_burst =
of_property_read_bool(np, "snps,mixed-burst");
}
return 0; return 0;
} }