From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sonic Zhang Subject: [PATCH 3/3] stmmac: Add an optional device tree property "snps,burst_len" Date: Thu, 22 Jan 2015 14:55:58 +0800 Message-ID: <1421909758-31359-3-git-send-email-sonic.adi@gmail.com> References: <1421909758-31359-1-git-send-email-sonic.adi@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Cc: , , Sonic Zhang To: Giuseppe Cavallaro , "David S. Miller" Return-path: Received: from mail-bn1on0078.outbound.protection.outlook.com ([157.56.110.78]:21859 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754316AbbAVHcz (ORCPT ); Thu, 22 Jan 2015 02:32:55 -0500 In-Reply-To: <1421909758-31359-1-git-send-email-sonic.adi@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Sonic Zhang This property define the AXI bug lenth. Signed-off-by: Sonic Zhang --- Documentation/devicetree/bindings/net/stmmac.txt | 1 + .../net/ethernet/stmicro/stmmac/stmmac_platform.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt index c41afd9..8ca65ce 100644 --- a/Documentation/devicetree/bindings/net/stmmac.txt +++ b/Documentation/devicetree/bindings/net/stmmac.txt @@ -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: diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 3039de2..a20cf0d 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -234,6 +234,9 @@ 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) { -- 1.7.9.5