From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 787323D3307; Thu, 15 Jan 2026 17:29:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498187; cv=none; b=E0E0pJbmBbb07WQgMsio6di5OgICWtsElJSnW6TWnuAEIOWI2KzxzRj0wybj9Ow1RtybGx/6MBKNGXCMLgdd48SscQj06zNQTVwuTW66MMwHnFfnTZIXeGaZ1wW3+w8qTUVKCSTJlI+Kc/+SOcSRdcJgDNrdppXV9DKEcqJRyo0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498187; c=relaxed/simple; bh=ZLzHcrnYq6eh537n2gRpxQBBRfivxZLSe/ZIMjZAaMY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E41x9dH5rLMR0kEAjy5t4PAz4+Z6XEjUFR1Hg6gNAGV9n0rQqv8t1JM80JhuPNfLiLJ1IcH2IchGgBwfwYuZTaGM1ZIHI5uAktNloK+Fuvup5H7018IkRavq3pnCJABDEdhg4X9OHUpMBBwEKUVruntD2HhBmPHEIBvxvxz1OW4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ntCHL4UI; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ntCHL4UI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7DECEC116D0; Thu, 15 Jan 2026 17:29:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768498186; bh=ZLzHcrnYq6eh537n2gRpxQBBRfivxZLSe/ZIMjZAaMY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ntCHL4UIpOE40S+QADnXg5yIGjDIf4Rzbet9PxclU53ZRR4tohsXGP43TqunUG1Qx cYg+tHQkBa/RT5rYOxjltZS9dMaoPZR5uw79ApAXm+yoDywA4h+2pCMV2viNSkc9CK ITnZQnEN9Ucv0mhOEAqXLP8YX8rOw1FCijHataWM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Potin Lai , Andrew Lunn , "David S. Miller" , Sasha Levin Subject: [PATCH 5.15 342/554] net: mdio: aspeed: move reg accessing part into separate functions Date: Thu, 15 Jan 2026 17:46:48 +0100 Message-ID: <20260115164258.609778557@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Potin Lai [ Upstream commit 737ca352569e744bf753b4522a6f91b120a734f1 ] Add aspeed_mdio_op() and aseed_mdio_get_data() for register accessing. aspeed_mdio_op() handles operations, write command to control register, then check and wait operations is finished (bit 31 is cleared). aseed_mdio_get_data() fetchs the result value of operation from data register. Signed-off-by: Potin Lai Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller Stable-dep-of: d1a1a4bade4b ("net: mdio: aspeed: add dummy read to avoid read-after-write issue") Signed-off-by: Sasha Levin --- drivers/net/mdio/mdio-aspeed.c | 70 ++++++++++++++++++---------------- 1 file changed, 38 insertions(+), 32 deletions(-) diff --git a/drivers/net/mdio/mdio-aspeed.c b/drivers/net/mdio/mdio-aspeed.c index e2273588c75b..f22be2f069e9 100644 --- a/drivers/net/mdio/mdio-aspeed.c +++ b/drivers/net/mdio/mdio-aspeed.c @@ -39,34 +39,35 @@ struct aspeed_mdio { void __iomem *base; }; -static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum) +static int aspeed_mdio_op(struct mii_bus *bus, u8 st, u8 op, u8 phyad, u8 regad, + u16 data) { struct aspeed_mdio *ctx = bus->priv; u32 ctrl; - u32 data; - int rc; - dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr, - regnum); - - /* Just clause 22 for the moment */ - if (regnum & MII_ADDR_C45) - return -EOPNOTSUPP; + dev_dbg(&bus->dev, "%s: st: %u op: %u, phyad: %u, regad: %u, data: %u\n", + __func__, st, op, phyad, regad, data); ctrl = ASPEED_MDIO_CTRL_FIRE - | FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22) - | FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_READ) - | FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr) - | FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regnum); + | FIELD_PREP(ASPEED_MDIO_CTRL_ST, st) + | FIELD_PREP(ASPEED_MDIO_CTRL_OP, op) + | FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, phyad) + | FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regad) + | FIELD_PREP(ASPEED_MDIO_DATA_MIIRDATA, data); iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL); - rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl, + return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl, !(ctrl & ASPEED_MDIO_CTRL_FIRE), ASPEED_MDIO_INTERVAL_US, ASPEED_MDIO_TIMEOUT_US); - if (rc < 0) - return rc; +} + +static int aspeed_mdio_get_data(struct mii_bus *bus) +{ + struct aspeed_mdio *ctx = bus->priv; + int rc; + u32 data; rc = readl_poll_timeout(ctx->base + ASPEED_MDIO_DATA, data, data & ASPEED_MDIO_DATA_IDLE, @@ -78,31 +79,36 @@ static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum) return FIELD_GET(ASPEED_MDIO_DATA_MIIRDATA, data); } -static int aspeed_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val) +static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum) { - struct aspeed_mdio *ctx = bus->priv; - u32 ctrl; + int rc; - dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n", - __func__, addr, regnum, val); + dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr, + regnum); /* Just clause 22 for the moment */ if (regnum & MII_ADDR_C45) return -EOPNOTSUPP; - ctrl = ASPEED_MDIO_CTRL_FIRE - | FIELD_PREP(ASPEED_MDIO_CTRL_ST, ASPEED_MDIO_CTRL_ST_C22) - | FIELD_PREP(ASPEED_MDIO_CTRL_OP, MDIO_C22_OP_WRITE) - | FIELD_PREP(ASPEED_MDIO_CTRL_PHYAD, addr) - | FIELD_PREP(ASPEED_MDIO_CTRL_REGAD, regnum) - | FIELD_PREP(ASPEED_MDIO_CTRL_MIIWDATA, val); + rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C22, MDIO_C22_OP_READ, + addr, regnum, 0); + if (rc < 0) + return rc; - iowrite32(ctrl, ctx->base + ASPEED_MDIO_CTRL); + return aspeed_mdio_get_data(bus); +} - return readl_poll_timeout(ctx->base + ASPEED_MDIO_CTRL, ctrl, - !(ctrl & ASPEED_MDIO_CTRL_FIRE), - ASPEED_MDIO_INTERVAL_US, - ASPEED_MDIO_TIMEOUT_US); +static int aspeed_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val) +{ + dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n", + __func__, addr, regnum, val); + + /* Just clause 22 for the moment */ + if (regnum & MII_ADDR_C45) + return -EOPNOTSUPP; + + return aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C22, MDIO_C22_OP_WRITE, + addr, regnum, val); } static int aspeed_mdio_probe(struct platform_device *pdev) -- 2.51.0