linux-kernel - Re: [PATCH v2 2/4] phy: allwinner: add phy driver for USB3 PHY on Allwinner H6 SoC

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Date:   Fri, 25 Oct 2019 17:15:25 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Ondrej Jirman <megous@...ous.com>, <linux-sunxi@...glegroups.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>, Icenowy Zheng <icenowy@...c.io>,
        Thomas Gleixner <tglx@...utronix.de>,
        Arnd Bergmann <arnd@...db.de>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH v2 2/4] phy: allwinner: add phy driver for USB3 PHY on
 Allwinner H6 SoC

Hi,

On 24/10/19 4:24 PM, Ondrej Jirman wrote:
> From: Icenowy Zheng <icenowy@...c.io>
> 
> Allwinner H6 SoC contains a USB3 PHY (with USB2 DP/DM lines also
> controlled).
> 
> Add a driver for it.
> 
> The register operations in this driver is mainly extracted from the BSP
> USB3 driver.
> 
> Signed-off-by: Ondrej Jirman <megous@...ous.com>
> Signed-off-by: Icenowy Zheng <icenowy@...c.io>
> Reviewed-by: Chen-Yu Tsai <wens@...e.org>
> Acked-by: Maxime Ripard <mripard@...nel.org>
> ---
>  drivers/phy/allwinner/Kconfig           |  12 ++
>  drivers/phy/allwinner/Makefile          |   1 +
>  drivers/phy/allwinner/phy-sun50i-usb3.c | 195 ++++++++++++++++++++++++
>  3 files changed, 208 insertions(+)
>  create mode 100644 drivers/phy/allwinner/phy-sun50i-usb3.c
> 
> diff --git a/drivers/phy/allwinner/Kconfig b/drivers/phy/allwinner/Kconfig
> index 215425296c77..fcae35ddd430 100644
> --- a/drivers/phy/allwinner/Kconfig
> +++ b/drivers/phy/allwinner/Kconfig
> @@ -45,3 +45,15 @@ config PHY_SUN9I_USB
>  	  sun9i SoCs.
>  
>  	  This driver controls each individual USB 2 host PHY.
> +
> +config PHY_SUN50I_USB3
> +	tristate "Allwinner sun50i SoC USB3 PHY driver"
> +	depends on ARCH_SUNXI && HAS_IOMEM && OF
> +	depends on RESET_CONTROLLER
> +	select USB_COMMON

Looks like USB_COMMON is not required here.
> +	select GENERIC_PHY
> +	help
> +	  Enable this to support the USB3.0-capable transceiver that is
> +	  part of some Allwinner sun50i SoCs.
> +
> +	  This driver controls each individual USB 2+3 host PHY combo.
> diff --git a/drivers/phy/allwinner/Makefile b/drivers/phy/allwinner/Makefile
> index 799a65c0b58d..bd74901a1255 100644
> --- a/drivers/phy/allwinner/Makefile
> +++ b/drivers/phy/allwinner/Makefile
> @@ -2,3 +2,4 @@
>  obj-$(CONFIG_PHY_SUN4I_USB)		+= phy-sun4i-usb.o
>  obj-$(CONFIG_PHY_SUN6I_MIPI_DPHY)	+= phy-sun6i-mipi-dphy.o
>  obj-$(CONFIG_PHY_SUN9I_USB)		+= phy-sun9i-usb.o
> +obj-$(CONFIG_PHY_SUN50I_USB3)		+= phy-sun50i-usb3.o
> diff --git a/drivers/phy/allwinner/phy-sun50i-usb3.c b/drivers/phy/allwinner/phy-sun50i-usb3.c
> new file mode 100644
> index 000000000000..8e170a4d0a11
> --- /dev/null
> +++ b/drivers/phy/allwinner/phy-sun50i-usb3.c
> @@ -0,0 +1,195 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Allwinner sun50i(H6) USB 3.0 phy driver
> + *
> + * Copyright (C) 2017 Icenowy Zheng <icenowy@...c.io>
> + *
> + * Based on phy-sun9i-usb.c, which is:
> + *
> + * Copyright (C) 2014-2015 Chen-Yu Tsai <wens@...e.org>
> + *
> + * Based on code from Allwinner BSP, which is:
> + *
> + * Copyright (c) 2010-2015 Allwinner Technology Co., Ltd.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/err.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/phy/phy.h>
> +#include <linux/usb/of.h>

this too..

Thanks
Kishon