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Date: Wed, 07 Dec 2011 14:49:46 +0100
From: Nicolas Ferre <nicolas.ferre@...el.com>
To: netdev@...r.kernel.org, David Miller <davem@...emloft.net>
CC: robherring2@...il.com, devicetree-discuss@...ts.ozlabs.org,
plagnioj@...osoft.com, linux-arm-kernel@...ts.infradead.org,
grant.likely@...retlab.ca, linux-kernel@...r.kernel.org,
jamie@...ieiles.com
Subject: Re: [PATCH v3 1/2] net/macb: add DT support for Cadence macb/gem
driver
On 12/05/2011 12:59 PM, Nicolas Ferre :
> From: Jean-Christophe PLAGNIOL-VILLARD<plagnioj@...osoft.com>
>
> Allow the device tree to provide the mac address and the phy mode.
>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD<plagnioj@...osoft.com>
> [nicolas.ferre@...el.com: change "compatible" node property, doc and DT hwaddr]
> Signed-off-by: Nicolas Ferre<nicolas.ferre@...el.com>
> [jamie@...ieiles.com: add "gem" compatibility strings and doc]
> Acked-by: Jamie Iles<jamie@...ieiles.com>
David, can I have your acknowledgment on this patch so that I can send
it through arm-soc git tree? This way it will reside on top of previous
work by Jamie that is already in arm-soc git (for-next branch).
Thanks, best regards,
> ---
> v3: add "gem" compatibility strings
> v2: modify macb_get_hwaddr_dt() parameter
>
> Documentation/devicetree/bindings/net/macb.txt | 24 ++++++++
> drivers/net/ethernet/cadence/macb.c | 73 +++++++++++++++++++++---
> drivers/net/ethernet/cadence/macb.h | 2 +
> 3 files changed, 91 insertions(+), 8 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/net/macb.txt
>
> diff --git a/Documentation/devicetree/bindings/net/macb.txt b/Documentation/devicetree/bindings/net/macb.txt
> new file mode 100644
> index 0000000..2e24f05
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/macb.txt
> @@ -0,0 +1,24 @@
> +* Cadence MACB/GEM Ethernet controller
> +
> +Required properties:
> +- compatible: Should be "cdns,[<chip>-]{macb|gem}"
> + Use "cdns,at91sam9260-macb" Atmel at91sam9260 and at91sam9263 SoCs.
> + Use "cdns,at32ap7000-macb" for other 10/100 usage or use the generic form: "cdns,macb".
> + Use "cnds,pc302-gem" for Picochip picoXcell pc302 and later devices based on
> + the Cadence GEM, or the generic form: "cdns,gem".
> +- reg: Address and length of the register set for the device
> +- interrupts: Should contain macb interrupt
> +- phy-mode: String, operation mode of the PHY interface.
> + Supported values are: "mii", "rmii", "gmii", "rgmii".
> +
> +Optional properties:
> +- local-mac-address: 6 bytes, mac address
> +
> +Examples:
> +
> + macb0: ethernet@...c4000 {
> + compatible = "cdns,at32ap7000-macb";
> + reg =<0xfffc4000 0x4000>;
> + interrupts =<21>;
> + phy-mode = "rmii";
> + };
> diff --git a/drivers/net/ethernet/cadence/macb.c b/drivers/net/ethernet/cadence/macb.c
> index 64d6146..baf1a0d 100644
> --- a/drivers/net/ethernet/cadence/macb.c
> +++ b/drivers/net/ethernet/cadence/macb.c
> @@ -23,6 +23,8 @@
> #include<linux/platform_data/macb.h>
> #include<linux/platform_device.h>
> #include<linux/phy.h>
> +#include<linux/of_device.h>
> +#include<linux/of_net.h>
>
> #include "macb.h"
>
> @@ -191,7 +193,6 @@ static int macb_mii_probe(struct net_device *dev)
> {
> struct macb *bp = netdev_priv(dev);
> struct phy_device *phydev;
> - struct macb_platform_data *pdata;
> int ret;
>
> phydev = phy_find_first(bp->mii_bus);
> @@ -200,14 +201,11 @@ static int macb_mii_probe(struct net_device *dev)
> return -1;
> }
>
> - pdata = bp->pdev->dev.platform_data;
> /* TODO : add pin_irq */
>
> /* attach the mac to the phy */
> ret = phy_connect_direct(dev, phydev,&macb_handle_link_change, 0,
> - pdata&& pdata->is_rmii ?
> - PHY_INTERFACE_MODE_RMII :
> - PHY_INTERFACE_MODE_MII);
> + bp->phy_interface);
> if (ret) {
> netdev_err(dev, "Could not attach to PHY\n");
> return ret;
> @@ -1244,6 +1242,52 @@ static const struct net_device_ops macb_netdev_ops = {
> #endif
> };
>
> +#if defined(CONFIG_OF)
> +static const struct of_device_id macb_dt_ids[] = {
> + { .compatible = "cdns,at32ap7000-macb" },
> + { .compatible = "cdns,at91sam9260-macb" },
> + { .compatible = "cdns,macb" },
> + { .compatible = "cdns,pc302-gem" },
> + { .compatible = "cdns,gem" },
> + { /* sentinel */ }
> +};
> +
> +MODULE_DEVICE_TABLE(of, macb_dt_ids);
> +
> +static int __devinit macb_get_phy_mode_dt(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> +
> + if (np)
> + return of_get_phy_mode(np);
> +
> + return -ENODEV;
> +}
> +
> +static int __devinit macb_get_hwaddr_dt(struct macb *bp)
> +{
> + struct device_node *np = bp->pdev->dev.of_node;
> + if (np) {
> + const char *mac = of_get_mac_address(np);
> + if (mac) {
> + memcpy(bp->dev->dev_addr, mac, ETH_ALEN);
> + return 0;
> + }
> + }
> +
> + return -ENODEV;
> +}
> +#else
> +static int __devinit macb_get_phy_mode_dt(struct platform_device *pdev)
> +{
> + return -ENODEV;
> +}
> +static int __devinit macb_get_hwaddr_dt(struct macb *bp)
> +{
> + return -ENODEV;
> +}
> +#endif
> +
> static int __init macb_probe(struct platform_device *pdev)
> {
> struct macb_platform_data *pdata;
> @@ -1318,10 +1362,22 @@ static int __init macb_probe(struct platform_device *pdev)
> config |= macb_dbw(bp);
> macb_writel(bp, NCFGR, config);
>
> - macb_get_hwaddr(bp);
> - pdata = pdev->dev.platform_data;
> + err = macb_get_hwaddr_dt(bp);
> + if (err< 0)
> + macb_get_hwaddr(bp);
> +
> + err = macb_get_phy_mode_dt(pdev);
> + if (err< 0) {
> + pdata = pdev->dev.platform_data;
> + if (pdata&& pdata->is_rmii)
> + bp->phy_interface = PHY_INTERFACE_MODE_RMII;
> + else
> + bp->phy_interface = PHY_INTERFACE_MODE_MII;
> + } else {
> + bp->phy_interface = err;
> + }
>
> - if (pdata&& pdata->is_rmii)
> + if (bp->phy_interface == PHY_INTERFACE_MODE_RMII)
> #if defined(CONFIG_ARCH_AT91)
> macb_or_gem_writel(bp, USRIO, (MACB_BIT(RMII) |
> MACB_BIT(CLKEN)));
> @@ -1444,6 +1500,7 @@ static struct platform_driver macb_driver = {
> .driver = {
> .name = "macb",
> .owner = THIS_MODULE,
> + .of_match_table = of_match_ptr(macb_dt_ids),
> },
> };
>
> diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
> index 1931078..335e288 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -532,6 +532,8 @@ struct macb {
> unsigned int link;
> unsigned int speed;
> unsigned int duplex;
> +
> + phy_interface_t phy_interface;
> };
>
> static inline bool macb_is_gem(struct macb *bp)
--
Nicolas Ferre
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