From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 22A55C43602 for ; Wed, 1 Jul 2026 09:56:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date :Subject:Cc:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=YXbWsJdVyrdyTG0h5l7l2loSKTm6mVXPsPtw2ami5dk=; b=jJce4vhTpIaSKWyjB7Hxs1vjzY RiO2JtD1vL53uU9A0C/2RLPfocPh+4gbDxZTVKpHblfqiTKABOwz1l2E9HhHHFpnI/XDFQmUmODLf AeVvInJTBv+0tvgKHsmwjmZhMpl167kRzAo+1aQR7NEMF1boKMz9ynityeygbeBAJ6ZRcI+ejzvU1 KqfvTFvVGi/WwOsBQiP0uAyr5h3oOA1bdcJKKSDG9mK4CrdpOuC70ucXmPGaTsSClSSAU92aNg3Um HEndcl1aHkxzgjnOTUFsZdRLtwxu61BB3NFPcLZkgXVZDB9ujmVKxD2/TmgSwUK0jDrU1mLRXlIka lqbxUTlA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1werfi-00000001FGF-2Wka; Wed, 01 Jul 2026 09:55:58 +0000 Received: from gloria.sntech.de ([185.11.138.130]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1werff-00000001FFR-1IWR; Wed, 01 Jul 2026 09:55:56 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sntech.de; s=gloria202408; h=Content-Type:Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Reply-To; bh=YXbWsJdVyrdyTG0h5l7l2loSKTm6mVXPsPtw2ami5dk=; b=CBFCH8L3XGKiP/K1ZN7vVXVeHO TYkbcdRb7HG3F74/uf8JkzcO+CYf/pQ8hVd/bQW64Ez2rZ4zxcV4TD0jnnJseomf1envfpC8mnB+Q AXx+xHjOmIhyrn9yFTao5hqiJWjmm1v9eFQzdTye49MOlx8QrLadNqQKz4MVVq9UicyCi7m9t222i SUAkN9B4gjxbnt2lMrxs+JROzdPZgH7xqe3MBWAMt+K5c4hXSLlrlhoQtMTZaYHbAKEzBypRxVrM4 X4p3CoGibwpF2ye7JhDmqplKnFc8fTDvLGL3P4wY8T7vuXpwFxPsznPvG3gb2gCl+RTv1YHEL7YtO PBd3NovA==; From: Heiko =?UTF-8?B?U3TDvGJuZXI=?= To: Marc Kleine-Budde , linux-can@vger.kernel.org, 1579567540@qq.com Cc: Vincent Mailhol , kernel@pengutronix.de, Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, luch00 <1579567540@qq.com> Subject: Re: [PATCH 2/3] can: rockchip: add RK3588 CAN-FD support Date: Wed, 01 Jul 2026 11:55:39 +0200 Message-ID: <2064877.jZfb76A358@diego> In-Reply-To: References: <20260701070128.2096267-1-1579567540@qq.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260701_025555_546005_23A85632 X-CRM114-Status: GOOD ( 20.77 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, Am Mittwoch, 1. Juli 2026, 09:01:27 Mitteleurop=C3=A4ische Sommerzeit schri= eb 1579567540@qq.com: > From: luch00 <1579567540@qq.com> please use a real name, not an alias. > Add support for the RK3588v2 CAN-FD controller by introducing a > dedicated model ID and OF match entry. >=20 > The block is closely related to the existing RK3568 variants, but it > cannot reuse their match data unchanged. In particular, RK3588v2 > encodes RX_FIFO_CNT in bits 7:5 instead of 6:4, so the RX path needs > SoC-specific handling. >=20 > Validation on RK3588v2 also shows that its observed errata profile does > not fully match rk3568v2/rk3568v3, so keep a dedicated devtype for this > variant instead of relying on an rk3568 fallback. =46unnily enough, we seem to have worked on the same topic at the same time :-) https://lore.kernel.org/lkml/20260630164336.3444550-1-heiko@sntech.de/ > Signed-off-by: luch00 <1579567540@qq.com> > --- > drivers/net/can/rockchip/rockchip_canfd-core.c | 14 ++++++++++++++ > drivers/net/can/rockchip/rockchip_canfd-rx.c | 5 ++++- > drivers/net/can/rockchip/rockchip_canfd.h | 12 +++++++++++- > 3 files changed, 29 insertions(+), 2 deletions(-) >=20 > diff --git a/drivers/net/can/rockchip/rockchip_canfd-core.c b/drivers/net= /can/rockchip/rockchip_canfd-core.c > index 29de0c01e..3c2480785 100644 > --- a/drivers/net/can/rockchip/rockchip_canfd-core.c > +++ b/drivers/net/can/rockchip/rockchip_canfd-core.c > @@ -50,6 +50,15 @@ static const struct rkcanfd_devtype_data rkcanfd_devty= pe_data_rk3568v3 =3D { > RKCANFD_QUIRK_CANFD_BROKEN, > }; > =20 > +/* Tests on the rk3588v2 reproduce Erratum 5, but not > + * Erratum 6 or the special CAN-FD frames that trigger Error Interrupts > + * on rk3568v2/rk3568v3. > + */ Here I could reproduce erratum 6 though: https://lore.kernel.org/lkml/20260630164336.3444550-4-heiko@sntech.de/ [...] > diff --git a/drivers/net/can/rockchip/rockchip_canfd-rx.c b/drivers/net/c= an/rockchip/rockchip_canfd-rx.c > index 475c0409e..fe64db373 100644 > --- a/drivers/net/can/rockchip/rockchip_canfd-rx.c > +++ b/drivers/net/can/rockchip/rockchip_canfd-rx.c > @@ -281,7 +281,10 @@ rkcanfd_rx_fifo_get_len(const struct rkcanfd_priv *p= riv) > { > const u32 reg =3D rkcanfd_read(priv, RKCANFD_REG_RX_FIFO_CTRL); > =20 > - return FIELD_GET(RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT, reg); > + if (priv->devtype_data.model =3D=3D RKCANFD_MODEL_RK3588V2) > + return FIELD_GET(RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT_RK3588, reg); > + > + return FIELD_GET(RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT_RK3568, reg); > } > =20 > int rkcanfd_handle_rx_int(struct rkcanfd_priv *priv) > diff --git a/drivers/net/can/rockchip/rockchip_canfd.h b/drivers/net/can/= rockchip/rockchip_canfd.h > index 93131c7d7..f6105b904 100644 > --- a/drivers/net/can/rockchip/rockchip_canfd.h > +++ b/drivers/net/can/rockchip/rockchip_canfd.h > @@ -214,7 +214,8 @@ > #define RKCANFD_REG_TXEVENT_FIFO_CTRL_TXE_FIFO_ENABLE BIT(0) > =20 > #define RKCANFD_REG_RX_FIFO_CTRL 0x118 > -#define RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT GENMASK(6, 4) > +#define RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT_RK3568 GENMASK(6, 4) > +#define RKCANFD_REG_RX_FIFO_CTRL_RX_FIFO_CNT_RK3588 GENMASK(7, 5) Oh, didn't see this when doing my variant of the support, so cool that you found this. Heiko