From mboxrd@z Thu Jan 1 00:00:00 1970 From: Daniel Mack Subject: [PATCH v3 2/5] net: ethernet: cpsw: add optional third memory region for CONTROL module Date: Fri, 23 Aug 2013 14:08:52 +0200 Message-ID: <1377259735-20337-3-git-send-email-zonque@gmail.com> References: <1377259735-20337-1-git-send-email-zonque@gmail.com> Cc: bcousson@baylibre.com, nsekhar@ti.com, sergei.shtylyov@cogentembedded.com, davem@davemloft.net, ujhelyi.m@gmail.com, mugunthanvnm@ti.com, vaibhav.bedia@ti.com, d-gerlach@ti.com, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, devicetree@vger.kernel.org, Daniel Mack To: netdev@vger.kernel.org Return-path: Received: from svenfoo.org ([82.94.215.22]:48146 "EHLO mail.zonque.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755388Ab3HWMJG (ORCPT ); Fri, 23 Aug 2013 08:09:06 -0400 In-Reply-To: <1377259735-20337-1-git-send-email-zonque@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: At least the AM33xx SoC has a control module register to configure details such as the hardware ethernet interface mode. I'm not sure whether all SoCs which feature the cpsw block have such a register, so that third memory region is considered optional for now. Signed-off-by: Daniel Mack --- Documentation/devicetree/bindings/net/cpsw.txt | 5 ++++- drivers/net/ethernet/ti/cpsw.c | 16 ++++++++++++++++ 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt index 05d660e..4e5ca54 100644 --- a/Documentation/devicetree/bindings/net/cpsw.txt +++ b/Documentation/devicetree/bindings/net/cpsw.txt @@ -4,7 +4,10 @@ TI SoC Ethernet Switch Controller Device Tree Bindings Required properties: - compatible : Should be "ti,cpsw" - reg : physical base address and size of the cpsw - registers map + registers map. + An optional third memory region can be supplied if + the platform has a control module register to + configure phy interface details - interrupts : property with a value describing the interrupt number - interrupt-parent : The parent interrupt controller diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 1a91aac..bd0b664 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -372,6 +372,7 @@ struct cpsw_priv { struct cpsw_platform_data data; struct cpsw_ss_regs __iomem *regs; struct cpsw_wr_regs __iomem *wr_regs; + u32 __iomem *gmii_sel_reg; u8 __iomem *hw_stats; struct cpsw_host_regs __iomem *host_port_regs; u32 msg_enable; @@ -1999,6 +2000,21 @@ static int cpsw_probe(struct platform_device *pdev) goto clean_runtime_disable_ret; } + /* If the control memory region is unspecified, continue without it. + * If it is specified, but we're unable to reserve it, bail. + */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); + if (!res) { + dev_err(priv->dev, "error getting control i/o resource\n"); + goto no_gmii_sel; + } + priv->gmii_sel_reg = devm_ioremap_resource(&pdev->dev, res); + if (!priv->gmii_sel_reg) { + dev_err(priv->dev, "unable to map control i/o region\n"); + goto clean_runtime_disable_ret; + } + +no_gmii_sel: memset(&dma_params, 0, sizeof(dma_params)); memset(&ale_params, 0, sizeof(ale_params)); -- 1.8.3.1