linux-kernel - RE: [PATCH 3/3] drivers: usb :fsl: Remove USB Errata checking code

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Message-ID: <AM5PR0402MB286565A969652495746F5D62F18B0@AM5PR0402MB2865.eurprd04.prod.outlook.com>
Date:   Wed, 9 Jan 2019 03:52:39 +0000
From:   Ran Wang <ran.wang_1@....com>
To:     Alan Stern <stern@...land.harvard.edu>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Yinbo Zhu <yinbo.zhu@....com>
Subject: RE: [PATCH 3/3] drivers: usb :fsl: Remove USB Errata checking code

Hi Alan,

> -----Original Message-----
> From: Alan Stern <stern@...land.harvard.edu>
> Sent: Wednesday, January 09, 2019 00:22
> To: Ran Wang <ran.wang_1@....com>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>; linux-
> usb@...r.kernel.org; linux-kernel@...r.kernel.org; Yinbo Zhu
> <yinbo.zhu@....com>
> Subject: Re: [PATCH 3/3] drivers: usb :fsl: Remove USB Errata checking code
> 
> On Tue, 8 Jan 2019, Ran Wang wrote:
> 
> > From: yinbo.zhu <yinbo.zhu@....com>
> >
> > Remove USB errata checking code from driver. Applicability of erratum
> > is retrieved by reading corresponding property in device tree.
> > This property is written during device tree fixup.
> >
> > Signed-off-by: Ramneek Mehresh <ramneek.mehresh@...escale.com>
> > Signed-off-by: Nikhil Badola <nikhil.badola@...escale.com>
> > Signed-off-by: yinbo.zhu <yinbo.zhu@....com>
> > Signed-off-by: Ran Wang <ran.wang_1@....com>
> > ---
> >  drivers/usb/host/ehci-fsl.c      |    7 +------
> >  drivers/usb/host/fsl-mph-dr-of.c |    6 ++++++
> >  include/linux/fsl_devices.h      |    7 ++++---
> >  3 files changed, 11 insertions(+), 9 deletions(-)
> >
> > diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
> > index 59ebe1b..2aa408a 100644
> > --- a/drivers/usb/host/ehci-fsl.c
> > +++ b/drivers/usb/host/ehci-fsl.c
> > @@ -304,14 +304,9 @@ static int ehci_fsl_usb_setup(struct ehci_hcd *ehci)
> >  			return -EINVAL;
> >
> >  	if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
> > -		unsigned int chip, rev, svr;
> > -
> > -		svr = mfspr(SPRN_SVR);
> > -		chip = svr >> 16;
> > -		rev = (svr >> 4) & 0xf;
> >
> >  		/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1
> chips */
> > -		if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
> > +		if (pdata->has_fsl_erratum_14 == 1)
> >  			ehci->has_fsl_port_bug = 1;
> >
> >  		if (pdata->port_enables & FSL_USB2_PORT0_ENABLED) diff --
> git
> > a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
> > index 677f9d5..4f8b8a0 100644
> > --- a/drivers/usb/host/fsl-mph-dr-of.c
> > +++ b/drivers/usb/host/fsl-mph-dr-of.c
> > @@ -225,6 +225,12 @@ static int fsl_usb2_mph_dr_of_probe(struct
> platform_device *ofdev)
> >  	pdata->has_fsl_erratum_a005697 =
> >  		of_property_read_bool(np, "fsl,usb_erratum-a005697");
> >
> > +	if (of_get_property(np, "fsl,usb_erratum_14", NULL))
> > +		pdata->has_fsl_erratum_14 = 1;
> > +	else
> > +		pdata->has_fsl_erratum_14 = 0;
> > +
> > +
> >  	/*
> >  	 * Determine whether phy_clk_valid needs to be checked
> >  	 * by reading property in device tree diff --git
> > a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h index
> > 60cef82..7aa51bc 100644
> > --- a/include/linux/fsl_devices.h
> > +++ b/include/linux/fsl_devices.h
> > @@ -98,10 +98,11 @@ struct fsl_usb2_platform_data {
> >
> >  	unsigned	suspended:1;
> >  	unsigned	already_suspended:1;
> > -	unsigned        has_fsl_erratum_a007792:1;
> > -	unsigned        has_fsl_erratum_a005275:1;
> > +	unsigned    has_fsl_erratum_a007792:1;
> > +	unsigned    has_fsl_erratum_14:1;
> > +	unsigned    has_fsl_erratum_a005275:1;
> >  	unsigned	has_fsl_erratum_a005697:1;
> > -	unsigned        check_phy_clk_valid:1;
> > +	unsigned    check_phy_clk_valid:1;
> 
> You are using spaces here instead of tabs, which alters the alignment.
> Don't do that.

Yes, will fix it in next version.

Regards,
Ran

> Alan Stern
> 
> >
> >  	/* register save area for suspend/resume */
> >  	u32		pm_command;