linux-kernel - Re: [RFC] usb-phy-generic: Add support to SMSC USB3315

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Message-ID: <b63462c4-e5d3-7bd3-f958-3e1db3650be9@cogentembedded.com>
Date:   Wed, 19 Apr 2017 13:03:23 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Peter Senna Tschudin <peter.senna@...labora.com>
Cc:     Peter Chen <peter.chen@....com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Fabien Lahoudere <fabien.lahoudere@...labora.co.uk>,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "open list:USB PHY LAYER" <linux-usb@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] usb-phy-generic: Add support to SMSC USB3315

Hello!

On 4/19/2017 9:14 AM, Peter Senna Tschudin wrote:

> We need the SMSC USB3315 clock and regulator to always be initialized.
> We also need the PHY driver to take the PHY out of reset. This patch
> extends the existing USB generic nop phy driver to include a new
> initialization path.
>
> A new compatible string "smsc,usb3315" is used to decide which
> initialization path to use.
>
> CC: Peter Chen <peter.chen@....com>
> CC: Stephen Boyd <sboyd@...eaurora.org>
> CC: Fabien Lahoudere <fabien.lahoudere@...labora.co.uk>
> Signed-off-by: Peter Senna Tschudin <peter.senna@...labora.com>
> ---
>
> This is a follow-up of previous discussion:
>   https://www.spinics.net/lists/linux-usb/msg146680.html
>
>  drivers/usb/phy/phy-generic.c | 33 +++++++++++++++++++++++++++++----
>  drivers/usb/phy/phy-generic.h |  1 +
>  2 files changed, 30 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/usb/phy/phy-generic.c b/drivers/usb/phy/phy-generic.c
> index 89d6e7a..6ea9ce4 100644
> --- a/drivers/usb/phy/phy-generic.c
> +++ b/drivers/usb/phy/phy-generic.c
[...]
> @@ -216,18 +221,29 @@ static int nop_set_host(struct usb_otg *otg, struct usb_bus *host)
>  	otg->host = host;
>  	return 0;
>  }

    Need empty line here.

> +int smsc_usb3315_init(struct usb_phy_generic *nop)
> +{
> +	/*
> +	 * If the gpio for controlling reset state is not available, try again
> +	 * later
> +	 */
> +	if(!nop->gpiod_reset)

    You hadn't run the patch thru scripts/checkpatch.pl before posting -- need 
space between *if* and (.

[...]
> @@ -304,6 +320,12 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop,
>  	nop->phy.otg->set_host		= nop_set_host;
>  	nop->phy.otg->set_peripheral	= nop_set_peripheral;
>
> +	if(node && of_device_is_compatible(node, "smsc,usb3315")) {

    Same here.

[...]

MBR, Sergei