Add a nop usb transcveiver driver. At the moment it does nothing, so is nothing more than a driver to satisfy the device tree dependencies. clk / vbus-regulator / vbus-detect-gpio support can be added later.
Signed-off-by: Sascha Hauer <[email protected]> --- drivers/phy/Kconfig | 15 +++++-- drivers/phy/Makefile | 1 + drivers/phy/usb-nop-xceiv.c | 104 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 116 insertions(+), 4 deletions(-) create mode 100644 drivers/phy/usb-nop-xceiv.c diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index e9461e1..b0c8b9b 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -2,9 +2,7 @@ # PHY # -menu "PHY Subsystem" - -config GENERIC_PHY +menuconfig GENERIC_PHY bool "PHY Core" help Generic PHY support. @@ -15,4 +13,13 @@ config GENERIC_PHY phy users can obtain reference to the PHY. All the users of this framework should select this config. -endmenu +if GENERIC_PHY + +config USB_NOP_XCEIV + bool "Generic USB nop phy" + help + This driver is to be used by all the usb transceiver which are either + built-in with usb ip or which are autonomous and doesn't require any + phy programming such as ISP1x04 etc. + +endif diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 74514ae..8fc8595 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -3,3 +3,4 @@ # obj-$(CONFIG_GENERIC_PHY) += phy-core.o +obj-$(CONFIG_USB_NOP_XCEIV) += usb-nop-xceiv.o diff --git a/drivers/phy/usb-nop-xceiv.c b/drivers/phy/usb-nop-xceiv.c new file mode 100644 index 0000000..606e098 --- /dev/null +++ b/drivers/phy/usb-nop-xceiv.c @@ -0,0 +1,104 @@ +/* + * Copyright (c) 2016 Sascha Hauer <[email protected]> + * + * 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; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + */ + +#include <common.h> +#include <init.h> +#include <of.h> +#include <errno.h> +#include <driver.h> +#include <malloc.h> +#include <usb/phy.h> +#include <linux/phy/phy.h> +#include <linux/clk.h> +#include <linux/err.h> + +struct nop_usbphy { + struct usb_phy usb_phy; + struct phy *phy; + struct phy_provider *provider; +}; + +static struct phy *nop_usbphy_xlate(struct device_d *dev, + struct of_phandle_args *args) +{ + struct nop_usbphy *nopphy = dev->priv; + + return nopphy->phy; +} + +static struct usb_phy *nop_usbphy_to_usbphy(struct phy *phy) +{ + struct nop_usbphy *nopphy = phy_get_drvdata(phy); + + return &nopphy->usb_phy; +} + +static const struct phy_ops nop_phy_ops = { + .to_usbphy = nop_usbphy_to_usbphy, +}; + +static int nop_usbphy_probe(struct device_d *dev) +{ + int ret; + struct nop_usbphy *nopphy; + + nopphy = xzalloc(sizeof(*nopphy)); + + dev->priv = nopphy; + + /* FIXME: Add clk support */ + /* FIXME: Add vbus regulator support */ + /* FIXME: Add vbus-detect-gpio support */ + + nopphy->usb_phy.dev = dev; + nopphy->phy = phy_create(dev, NULL, &nop_phy_ops, NULL); + if (IS_ERR(nopphy->phy)) { + ret = PTR_ERR(nopphy->phy); + goto err_free; + } + + phy_set_drvdata(nopphy->phy, nopphy); + + nopphy->provider = of_phy_provider_register(dev, nop_usbphy_xlate); + if (IS_ERR(nopphy->provider)) { + ret = PTR_ERR(nopphy->provider); + goto err_free; + } + + return 0; +err_free: + free(nopphy); + + return ret; +}; + +static __maybe_unused struct of_device_id nop_usbphy_dt_ids[] = { + { + .compatible = "usb-nop-xceiv", + }, { + /* sentinel */ + }, +}; + +static struct driver_d nop_usbphy_driver = { + .name = "usb-nop-xceiv", + .probe = nop_usbphy_probe, + .of_compatible = DRV_OF_COMPAT(nop_usbphy_dt_ids), +}; + +static int nop_usbphy_init(void) +{ + return platform_driver_register(&nop_usbphy_driver); +} +fs_initcall(nop_usbphy_init); -- 2.9.3 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
