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Tue, 3 Dec 2024 23:43:36 +1100 (AEDT) Received: by mail.gandi.net (Postfix) with ESMTPSA id 11F4DE0010; Tue, 3 Dec 2024 12:43:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1733229814; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=F1u0eeuSX4cb30X89CwQx+qR/vfxpPZBdpfTfsUK6pI=; b=VTeXo2MjeNeCnA0pgAtMBiOwjYEFVxDtbcCe2BCsPMaLaFqOSdUY8Wz4yogaefgoE2jgDJ AN1yJKClixBIIe8kvN509H3cHhd1GgJ1xV8JcReqCbmrWKYr8SBTn5ZKSXbAwvI8HXlcWB +0YJr92DeiSNMoZKvzaoHtV/g+8sdDmoEjXotPw3Uv0wFd75n/XIhfOd+0NagbIj6G/w1v JoRB1rynTzEFDF+O3Nn+ClSchRLzxjLWvDr4pNHBO9VDEli3prTi9MoBKkkSUlM5ynEh0S WMKQibomg5OWCuW7VTJyiYablk5g2ph2erdp09Fn+mXqNpeQlP62eiZZg6UhRA== From: Maxime Chevallier To: davem@davemloft.net, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , Christophe Leroy , Heiner Kallweit Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Simon Horman , Herve Codina , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , linuxppc-dev@lists.ozlabs.org Subject: [PATCH net-next v3 07/10] net: freescale: ucc_geth: Hardcode the preamble length to 7 bytes Date: Tue, 3 Dec 2024 13:43:18 +0100 Message-ID: <20241203124323.155866-8-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241203124323.155866-1-maxime.chevallier@bootlin.com> References: <20241203124323.155866-1-maxime.chevallier@bootlin.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,SPF_HELO_PASS,SPF_PASS autolearn=disabled version=4.0.0 X-Spam-Checker-Version: SpamAssassin 4.0.0 (2022-12-13) on lists.ozlabs.org The preamble length can be configured in ucc_geth, however it just ends-up always being configured to 7 bytes, as nothing ever changes the default value of 7. Make that value the default value when the MACCFG2 register gets initialized, and remove the code to configure that value altogether. Reviewed-by: Andrew Lunn Signed-off-by: Maxime Chevallier --- V3: No changes drivers/net/ethernet/freescale/ucc_geth.c | 21 --------------------- drivers/net/ethernet/freescale/ucc_geth.h | 4 ++-- 2 files changed, 2 insertions(+), 23 deletions(-) diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c index 566f53e24d28..81aefe291d80 100644 --- a/drivers/net/ethernet/freescale/ucc_geth.c +++ b/drivers/net/ethernet/freescale/ucc_geth.c @@ -132,7 +132,6 @@ static const struct ucc_geth_info ugeth_primary_info = { .transmitFlowControl = 1, .maxGroupAddrInHash = 4, .maxIndAddrInHash = 4, - .prel = 7, .maxFrameLength = 1518+16, /* Add extra bytes for VLANs etc. */ .minFrameLength = 64, .maxD1Length = 1520+16, /* Add extra bytes for VLANs etc. */ @@ -1205,18 +1204,6 @@ static int init_mac_station_addr_regs(u8 address_byte_0, return 0; } -static int init_preamble_length(u8 preamble_length, - u32 __iomem *maccfg2_register) -{ - if ((preamble_length < 3) || (preamble_length > 7)) - return -EINVAL; - - clrsetbits_be32(maccfg2_register, MACCFG2_PREL_MASK, - preamble_length << MACCFG2_PREL_SHIFT); - - return 0; -} - static int init_rx_parameters(int reject_broadcast, int receive_short_frames, int promiscuous, u32 __iomem *upsmr_register) @@ -1276,7 +1263,6 @@ static int adjust_enet_interface(struct ucc_geth_private *ugeth) struct ucc_geth_info *ug_info; struct ucc_geth __iomem *ug_regs; struct ucc_fast __iomem *uf_regs; - int ret_val; u32 upsmr, maccfg2; u16 value; @@ -1352,13 +1338,6 @@ static int adjust_enet_interface(struct ucc_geth_private *ugeth) put_device(&tbiphy->mdio.dev); } - ret_val = init_preamble_length(ug_info->prel, &ug_regs->maccfg2); - if (ret_val != 0) { - if (netif_msg_probe(ugeth)) - pr_err("Preamble length must be between 3 and 7 inclusive\n"); - return ret_val; - } - return 0; } diff --git a/drivers/net/ethernet/freescale/ucc_geth.h b/drivers/net/ethernet/freescale/ucc_geth.h index 2365b61c743a..dfb727327093 100644 --- a/drivers/net/ethernet/freescale/ucc_geth.h +++ b/drivers/net/ethernet/freescale/ucc_geth.h @@ -921,7 +921,8 @@ struct ucc_geth_hardware_statistics { #define UCC_GETH_UPSMR_INIT UCC_GETH_UPSMR_RES1 #define UCC_GETH_MACCFG1_INIT 0 -#define UCC_GETH_MACCFG2_INIT (MACCFG2_RESERVED_1) +#define UCC_GETH_MACCFG2_INIT (MACCFG2_RESERVED_1 | \ + (7 << MACCFG2_PREL_SHIFT)) /* Ethernet Address Type. */ enum enet_addr_type { @@ -1113,7 +1114,6 @@ struct ucc_geth_info { int transmitFlowControl; u8 maxGroupAddrInHash; u8 maxIndAddrInHash; - u8 prel; u16 maxFrameLength; u16 minFrameLength; u16 maxD1Length;