From patchwork Tue Aug 7 14:34:48 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ian Molton X-Patchwork-Id: 175652 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 2D8302C0089 for ; Wed, 8 Aug 2012 00:36:04 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755114Ab2HGOff (ORCPT ); Tue, 7 Aug 2012 10:35:35 -0400 Received: from ducie-dc1.codethink.co.uk ([37.128.190.40]:50811 "EHLO ducie-dc1.codethink.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754833Ab2HGOfH (ORCPT ); Tue, 7 Aug 2012 10:35:07 -0400 Received: from snark.dyn.ducie.codethink.co.uk (snark.dyn.ducie.codethink.co.uk [192.168.24.147]) by ducie-dc1.codethink.co.uk (Postfix) with ESMTPA id 257ED460B59; Tue, 7 Aug 2012 15:35:06 +0100 (BST) From: Ian Molton To: linux-arm-kernel@lists.infradead.org Cc: andrew@lunn.ch, thomas.petazzoni@free-electrons.com, ben.dooks@codethink.co.uk, arnd@arndb.de, netdev@vger.kernel.org Subject: [PATCH v3 3/7] mv643xx.c: Add basic device tree support. Date: Tue, 7 Aug 2012 15:34:48 +0100 Message-Id: <1344350092-24050-4-git-send-email-ian.molton@codethink.co.uk> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1344350092-24050-1-git-send-email-ian.molton@codethink.co.uk> References: <1344350092-24050-1-git-send-email-ian.molton@codethink.co.uk> Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds basic device tree support to the mv643xx ethernet driver. It should be enough for most current users of the device, and should allow a painless migration. Signed-off-by: Ian Molton --- Documentation/devicetree/bindings/net/mv643xx.txt | 75 +++++++++++++++++ drivers/net/ethernet/marvell/mv643xx_eth.c | 93 +++++++++++++++++++-- 2 files changed, 161 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/net/mv643xx.txt diff --git a/Documentation/devicetree/bindings/net/mv643xx.txt b/Documentation/devicetree/bindings/net/mv643xx.txt new file mode 100644 index 0000000..2727f79 --- /dev/null +++ b/Documentation/devicetree/bindings/net/mv643xx.txt @@ -0,0 +1,75 @@ +mv643xx related nodes. + +marvell,mdio-mv643xx: + +Required properties: + + - interrupts : where a is the SMI interrupt number. + - reg : the base address and size of the controllers register space. + +Optional properties: + - shared_smi : on some chips, the second PHY is "shared", meaning it is + really accessed via the first SMI controller. It is passed in this + way due to the present structure of the driver, which requires the + base address for the MAC to be passed in via the SMI controllers + platform data. + - tx_csum_limit : on some devices, this option is required for proper + operation wrt. jumbo frames. + + +Example: + +smi0: mdio@72000 { + compatible = "marvell,mdio-mv643xx"; + reg = <0x72000 0x4000>; + interrupts = <46>; + tx_csum_limit = <1600>; + status = "disabled"; +}; + +smi1: mdio@76000 { + compatible = "marvell,mdio-mv643xx"; + reg = <0x76000 0x4000>; + interrupts = <47>; + shared_smi = <&smi0>; + tx_csum_limit = <1600>; + status = "disabled"; +}; + + + +marvell,mv643xx-eth: + +Required properties: + - interrupts : the port interrupt number. + - mdio : phandle of the smi device as drescribed above + +Optional properties: + - port_number : the port number on this bus. + - phy_addr : the PHY address. + - reg : should match the mdio reg this device is attached to. + this is a required hack for now due to the way the + driver is constructed. This allows the device clock to be + kept running so that the MAC is not lost after boot. + + +Example: + +egiga0 { + compatible = "marvell,mv643xx-eth"; + reg = <0x72000 0x4000>; + mdio = <&smi0>; + port_number = <0>; + phy_addr = <0x80>; + interrupts = <11>; +}; + +egiga1 { + compatible = "marvell,mv643xx-eth"; + reg = <0x76000 0x4000>; + mdio = <&smi1>; + port_number = <0>; + phy_addr = <0x81>; + interrupts = <15>; +}; + diff --git a/drivers/net/ethernet/marvell/mv643xx_eth.c b/drivers/net/ethernet/marvell/mv643xx_eth.c index 92497eb..bb80050 100644 --- a/drivers/net/ethernet/marvell/mv643xx_eth.c +++ b/drivers/net/ethernet/marvell/mv643xx_eth.c @@ -48,6 +48,9 @@ #include #include #include +#include +#include +#include #include #include #include @@ -2601,7 +2604,7 @@ static void infer_hw_params(struct mv643xx_eth_shared_private *msp) static int mv643xx_eth_shared_probe(struct platform_device *pdev) { static int mv643xx_eth_version_printed; - struct mv643xx_eth_shared_platform_data *pd = pdev->dev.platform_data; + struct mv643xx_eth_shared_platform_data *pd; struct mv643xx_eth_shared_private *msp; const struct mbus_dram_target_info *dram; struct resource *res; @@ -2625,6 +2628,26 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev) if (msp->base == NULL) goto out_free; + if (pdev->dev.of_node) { + struct device_node *np = NULL; + + /* when all users of this driver use FDT, we can remove this */ + pd = kzalloc(sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_dbg(&pdev->dev, "Could not allocate platform data\n"); + goto out_free; + } + + of_property_read_u32(pdev->dev.of_node, + "tx_csum_limit", &pd->tx_csum_limit); + + np = of_parse_phandle(pdev->dev.of_node, "shared_smi", 0); + if (np) + pd->shared_smi = of_find_device_by_node(np); + + } else { + pd = pdev->dev.platform_data; + } /* * Set up and register SMI bus. */ @@ -2657,7 +2680,6 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (res != NULL) { int err; - err = request_irq(res->start, mv643xx_eth_err_irq, IRQF_SHARED, "mv643xx_eth", msp); if (!err) { @@ -2675,6 +2697,10 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev) msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ? pd->tx_csum_limit : 9 * 1024; + + if (pdev->dev.of_node) + kfree(pd); /* If we created a fake pd, free it now */ + infer_hw_params(msp); platform_set_drvdata(pdev, msp); @@ -2708,12 +2734,21 @@ static int mv643xx_eth_shared_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static struct of_device_id mv_mdio_dt_ids[] __devinitdata = { + { .compatible = "marvell,mdio-mv643xx", }, + {}, +}; +MODULE_DEVICE_TABLE(of, mv_mdio_dt_ids); +#endif + static struct platform_driver mv643xx_eth_shared_driver = { .probe = mv643xx_eth_shared_probe, .remove = mv643xx_eth_shared_remove, .driver = { .name = MV643XX_ETH_SHARED_NAME, .owner = THIS_MODULE, + .of_match_table = of_match_ptr(mv_mdio_dt_ids), }, }; @@ -2873,7 +2908,36 @@ static int mv643xx_eth_probe(struct platform_device *pdev) struct resource *res; int err; - pd = pdev->dev.platform_data; + if (pdev->dev.of_node) { + struct device_node *np = NULL; + + /* when all users of this driver use FDT, we can remove this */ + pd = kzalloc(sizeof(*pd), GFP_KERNEL); + if (!pd) { + dev_dbg(&pdev->dev, "Could not allocate platform data\n"); + return -ENOMEM; + } + + of_property_read_u32(pdev->dev.of_node, + "port_number", &pd->port_number); + + if (!of_property_read_u32(pdev->dev.of_node, + "phy_addr", &pd->phy_addr)) + pd->phy_addr = MV643XX_ETH_PHY_ADDR(pd->phy_addr); + else + pd->phy_addr = MV643XX_ETH_PHY_ADDR_DEFAULT; + + np = of_parse_phandle(pdev->dev.of_node, "mdio", 0); + if (np) { + pd->shared = of_find_device_by_node(np); + } else { + kfree(pd); + return -ENODEV; + } + } else { + pd = pdev->dev.platform_data; + } + if (pd == NULL) { dev_err(&pdev->dev, "no mv643xx_eth_platform_data\n"); return -ENODEV; @@ -2881,12 +2945,15 @@ static int mv643xx_eth_probe(struct platform_device *pdev) if (pd->shared == NULL) { dev_err(&pdev->dev, "no mv643xx_eth_platform_data->shared\n"); - return -ENODEV; + err = -ENODEV; + goto out_free_pd; } dev = alloc_etherdev_mq(sizeof(struct mv643xx_eth_private), 8); - if (!dev) - return -ENOMEM; + if (!dev) { + err = -ENOMEM; + goto out_free_pd; + } mp = netdev_priv(dev); platform_set_drvdata(pdev, mp); @@ -2923,6 +2990,8 @@ static int mv643xx_eth_probe(struct platform_device *pdev) init_pscr(mp, pd->speed, pd->duplex); + if (pdev->dev.of_node) + kfree(pd); /* If we created a fake pd, free it now */ mib_counters_clear(mp); @@ -2942,7 +3011,6 @@ static int mv643xx_eth_probe(struct platform_device *pdev) mp->rx_oom.data = (unsigned long)mp; mp->rx_oom.function = oom_timer_wrapper; - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); BUG_ON(!res); dev->irq = res->start; @@ -2991,6 +3059,8 @@ out: } #endif free_netdev(dev); +out_free_pd: + kfree(pd); return err; } @@ -3030,6 +3100,14 @@ static void mv643xx_eth_shutdown(struct platform_device *pdev) port_reset(mp); } +#ifdef CONFIG_OF +static struct of_device_id mv_eth_dt_ids[] __devinitdata = { + { .compatible = "marvell,mv643xx-eth", }, + {}, +}; +MODULE_DEVICE_TABLE(of, mv_eth_dt_ids); +#endif + static struct platform_driver mv643xx_eth_driver = { .probe = mv643xx_eth_probe, .remove = mv643xx_eth_remove, @@ -3037,6 +3115,7 @@ static struct platform_driver mv643xx_eth_driver = { .driver = { .name = MV643XX_ETH_NAME, .owner = THIS_MODULE, + .of_match_table = of_match_ptr(mv_eth_dt_ids), }, };