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Re: [PATCH 15/21] rt2x00: rt2800lib: hardcode txmixer gain values to zero for RT3883

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On Wed, Apr 10, 2019 at 10:22:42AM +0200, Stanislaw Gruszka wrote:
> On Tue, Apr 09, 2019 at 05:26:46PM +0200, Tom Psyborg wrote:
> > On 09/04/2019, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote:
> > > From: Gabor Juhos <juhosg@xxxxxxxxxxx>
> > >
> > > Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
> > > Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
> > > ---
> > >  drivers/net/wireless/ralink/rt2x00/rt2800lib.c | 6 ++++--
> > >  1 file changed, 4 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
> > > b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
> > > index 0687bef990e1..4ea94c62d439 100644
> > > --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
> > > +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
> > > @@ -9128,7 +9128,8 @@ static u8 rt2800_get_txmixer_gain_24g(struct
> > > rt2x00_dev *rt2x00dev)
> > >  {
> > >  	u16 word;
> > >
> > > -	if (rt2x00_rt(rt2x00dev, RT3593))
> > > +	if (rt2x00_rt(rt2x00dev, RT3593) ||
> > > +	    rt2x00_rt(rt2x00dev, RT3883))
> > >  		return 0;
> > >
> > >  	word = rt2800_eeprom_read(rt2x00dev, EEPROM_TXMIXER_GAIN_BG);
> > > @@ -9142,7 +9143,8 @@ static u8 rt2800_get_txmixer_gain_5g(struct rt2x00_dev
> > > *rt2x00dev)
> > >  {
> > >  	u16 word;
> > >
> > > -	if (rt2x00_rt(rt2x00dev, RT3593))
> > > +	if (rt2x00_rt(rt2x00dev, RT3593) ||
> > > +	    rt2x00_rt(rt2x00dev, RT3883))
> > >  		return 0;
> > >
> > >  	word = rt2800_eeprom_read(rt2x00dev, EEPROM_TXMIXER_GAIN_A);
> > > --
> > > 2.7.5
> > >
> > >
> > 
> > Did someone actually verified this is correct?
> 
> I don't know if it was verified or not.

Gabor supposedly verified this when he wrote that patch 6 years ago,
it was reviewed and merged by John Crispin back then:

commit 6e3de004f9cf6724b1ad950e7cb3b98f1b4af54d
Author: John Crispin <blogic@xxxxxxxxxxx>
Date:   Wed Apr 23 07:52:18 2014 +0000

    mac80211: rt2x00: add support for the RT3662/RT3883 SoCs
    
    Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
    
    git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40558 3c298f89-4303-0410-b956-a3cf2f4a3e73

Since when we carry it in OpenWrt and supposedly everyone with Rt3xx3
WiSoC devices is using it and there haven't been any complains so far.


Cheers


Daniel

> 
> Stanislaw



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