Hi,
On Monday 06 June 2016 06:11 PM, Pramod Kumar wrote:
> Add PCI Phy support for Broadcom Northstar2 SoCs. This driver uses the
> interface from the iproc mdio mux driver to enable the devices
> respective phys.
>
> Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
> Signed-off-by: Jon Mason <jonmason@xxxxxxxxxxxx>
> Signed-off-by: Pramod Kumar <pramod.kumar@xxxxxxxxxxxx>
> ---
> drivers/phy/Kconfig | 8 +++
> drivers/phy/Makefile | 2 +-
> drivers/phy/phy-bcm-ns2-pcie.c | 115 +++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 124 insertions(+), 1 deletion(-)
> create mode 100644 drivers/phy/phy-bcm-ns2-pcie.c
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index b869b98..01fb93b 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -434,4 +434,12 @@ config PHY_CYGNUS_PCIE
>
> source "drivers/phy/tegra/Kconfig"
>
> +config PHY_NS2_PCIE
> + tristate "Broadcom Northstar2 PCIe PHY driver"
> + depends on OF && MDIO_BUS_MUX_BCM_IPROC
> + select GENERIC_PHY
> + default ARCH_BCM_IPROC
> + help
> + Enable this to support the Broadcom Northstar2 PCIe PHY.
> + If unsure, say N.
> endmenu
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index 9c3e73c..7aea094 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -53,5 +53,5 @@ obj-$(CONFIG_PHY_TUSB1210) += phy-tusb1210.o
> obj-$(CONFIG_PHY_BRCM_SATA) += phy-brcm-sata.o
> obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
> obj-$(CONFIG_PHY_CYGNUS_PCIE) += phy-bcm-cygnus-pcie.o
> -
> obj-$(CONFIG_ARCH_TEGRA) += tegra/
> +obj-$(CONFIG_PHY_NS2_PCIE) += phy-bcm-ns2-pcie.o
> diff --git a/drivers/phy/phy-bcm-ns2-pcie.c b/drivers/phy/phy-bcm-ns2-pcie.c
> new file mode 100644
> index 0000000..9513f7a
> --- /dev/null
> +++ b/drivers/phy/phy-bcm-ns2-pcie.c
> @@ -0,0 +1,115 @@
> +/*
> + * Copyright (C) 2016 Broadcom
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/device.h>
> +#include <linux/module.h>
> +#include <linux/of_mdio.h>
> +#include <linux/mdio.h>
> +#include <linux/phy.h>
> +#include <linux/phy/phy.h>
> +
> +struct ns2_pci_phy {
> + struct mdio_device *mdiodev;
> + struct phy *phy;
> +};
> +
> +#define BLK_ADDR_REG_OFFSET 0x1f
> +#define PLL_AFE1_100MHZ_BLK 0x2100
> +#define PLL_CLK_AMP_OFFSET 0x03
> +#define PLL_CLK_AMP_2P05V 0x2b18
> +
> +static int ns2_pci_phy_init(struct phy *p)
> +{
> + struct ns2_pci_phy *phy = phy_get_drvdata(p);
> + int rc;
> +
> + /* select the AFE 100MHz block page */
> + rc = mdiobus_write(phy->mdiodev->bus, phy->mdiodev->addr,
> + BLK_ADDR_REG_OFFSET, PLL_AFE1_100MHZ_BLK);
> + if (rc)
> + goto err;
> +
> + /* set the 100 MHz reference clock amplitude to 2.05 v */
> + rc = mdiobus_write(phy->mdiodev->bus, phy->mdiodev->addr,
> + PLL_CLK_AMP_OFFSET, PLL_CLK_AMP_2P05V);
> + if (rc)
> + goto err;
> +
> + return 0;
> +
> +err:
> + dev_err(&phy->mdiodev->dev, "Error %d writing to phy\n", rc);
> + return rc;
> +}
> +
> +static struct phy_ops ns2_pci_phy_ops = {
> + .init = ns2_pci_phy_init,
.owner is required for phy_ops.
> +};
> +
> +static int ns2_pci_phy_probe(struct mdio_device *mdiodev)
> +{
> + struct device *dev = &mdiodev->dev;
> + struct phy_provider *provider;
> + struct ns2_pci_phy *p;
> + struct phy *phy;
> +
> + phy = devm_phy_create(dev, dev->of_node, &ns2_pci_phy_ops);
> + if (IS_ERR(phy)) {
> + dev_err(dev, "failed to create Phy\n");
> + return PTR_ERR(phy);
> + }
> +
> + p = devm_kmalloc(dev, sizeof(struct ns2_pci_phy),
> + GFP_KERNEL);
> + if (!p)
> + return -ENOMEM;
> +
> + p->mdiodev = mdiodev;
> + dev_set_drvdata(dev, p);
> +
> + p->phy = phy;
> + phy_set_drvdata(phy, p);
> +
> + provider = devm_of_phy_provider_register(&phy->dev,
> + of_phy_simple_xlate);
just use return PTR_ERR_OR_ZERO(provider);
All the error messages are un-necessary.
Thanks
Kishon
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