netdev - Re: [PATCH wireless-next v2 11/12] brcmfmac: pcie: Add IDs/properties for BCM4378

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Date:   Fri, 16 Sep 2022 10:31:57 +0300
From:   Kalle Valo <kvalo@...nel.org>
To:     Alvin Šipraga <ALSI@...g-olufsen.dk>
Cc:     "Russell King \(Oracle\)" <linux@...linux.org.uk>,
        Arend van Spriel <aspriel@...il.com>,
        Franky Lin <franky.lin@...adcom.com>,
        Hante Meuleman <hante.meuleman@...adcom.com>,
        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        "asahi\@lists.linux.dev" <asahi@...ts.linux.dev>,
        "brcm80211-dev-list.pdl\@broadcom.com" 
        <brcm80211-dev-list.pdl@...adcom.com>,
        "David S. Miller" <davem@...emloft.net>,
        "devicetree\@vger.kernel.org" <devicetree@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Hector Martin <marcan@...can.st>,
        Jakub Kicinski <kuba@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        "linux-arm-kernel\@lists.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-wireless\@vger.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev\@vger.kernel.org" <netdev@...r.kernel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rafa__ Mi__ecki <zajec5@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        "SHA-cyfmac-dev-list\@infineon.com" 
        <SHA-cyfmac-dev-list@...ineon.com>, Sven Peter <sven@...npeter.dev>
Subject: Re: [PATCH wireless-next v2 11/12] brcmfmac: pcie: Add IDs/properties for BCM4378

Alvin Šipraga <ALSI@...g-olufsen.dk> writes:

> On Thu, Sep 15, 2022 at 05:54:11PM +0100, Russell King (Oracle) wrote:
>> On Thu, Sep 15, 2022 at 03:34:59PM +0000, Alvin Šipraga wrote:
>> > On Mon, Sep 12, 2022 at 10:53:32AM +0100, Russell King wrote:
>> > > From: Hector Martin <marcan@...can.st>
>> > > 
>> > > This chip is present on Apple M1 (t8103) platforms:
>> > > 
>> > > * atlantisb (apple,j274): Mac mini (M1, 2020)
>> > > * honshu    (apple,j293): MacBook Pro (13-inch, M1, 2020)
>> > > * shikoku   (apple,j313): MacBook Air (M1, 2020)
>> > > * capri     (apple,j456): iMac (24-inch, 4x USB-C, M1, 2020)
>> > > * santorini (apple,j457): iMac (24-inch, 2x USB-C, M1, 2020)
>> > > 
>> > > Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
>> > > Signed-off-by: Hector Martin <marcan@...can.st>
>> > > Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
>> > > ---
>> > 
>> > Reviewed-by: Alvin Šipraga <alsi@...g-olufsen.dk>
>> > 
>> > >  drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c   | 2 ++
>> > >  drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c   | 8 ++++++++
>> > >  .../net/wireless/broadcom/brcm80211/include/brcm_hw_ids.h | 2 ++
>> > >  3 files changed, 12 insertions(+)
>> > > 
>> > > diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
>> > > index 23295fceb062..3026166a56c1 100644
>> > > --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
>> > > +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c
>> > > @@ -733,6 +733,8 @@ static u32 brcmf_chip_tcm_rambase(struct brcmf_chip_priv *ci)
>> > >  		return 0x160000;
>> > >  	case CY_CC_43752_CHIP_ID:
>> > >  		return 0x170000;
>> > > +	case BRCM_CC_4378_CHIP_ID:
>> > > +		return 0x352000;
>> > >  	default:
>> > >  		brcmf_err("unknown chip: %s\n", ci->pub.name);
>> > >  		break;
>> > > diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
>> > > index 269a516ae654..0c627f33049e 100644
>> > > --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
>> > > +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
>> > > @@ -59,6 +59,7 @@ BRCMF_FW_DEF(4365C, "brcmfmac4365c-pcie");
>> > >  BRCMF_FW_DEF(4366B, "brcmfmac4366b-pcie");
>> > >  BRCMF_FW_DEF(4366C, "brcmfmac4366c-pcie");
>> > >  BRCMF_FW_DEF(4371, "brcmfmac4371-pcie");
>> > > +BRCMF_FW_CLM_DEF(4378B1, "brcmfmac4378b1-pcie");
>> > >  
>> > >  /* firmware config files */
>> > >  MODULE_FIRMWARE(BRCMF_FW_DEFAULT_PATH "brcmfmac*-pcie.txt");
>> > > @@ -88,6 +89,7 @@ static const struct brcmf_firmware_mapping brcmf_pcie_fwnames[] = {
>> > >  	BRCMF_FW_ENTRY(BRCM_CC_43664_CHIP_ID, 0xFFFFFFF0, 4366C),
>> > >  	BRCMF_FW_ENTRY(BRCM_CC_43666_CHIP_ID, 0xFFFFFFF0, 4366C),
>> > >  	BRCMF_FW_ENTRY(BRCM_CC_4371_CHIP_ID, 0xFFFFFFFF, 4371),
>> > > +	BRCMF_FW_ENTRY(BRCM_CC_4378_CHIP_ID, 0xFFFFFFFF, 4378B1), /* 3 */
>> > 
>> > What is /* 3 */?
>> 
>> Hector says that it was mentioned in the prior review round as well.
>> It's the revision ID. The mask allows all IDs for chips where no
>> split has been seen, but if a new one comes up that comment is there
>> so we know where to split the mask.
>
> Alright, makes sense. If you happen to re-spin the series then it would
> be nice to include this info in the commit message.

And maybe even change the comment to something like:

/* revision ID 3 */

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