netdev - Re: [PATCH 2/7] net: phy: Fix the register offsets in Broadcom iProc mdio mux driver

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Date:   Thu, 26 Jul 2018 21:06:36 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Arun Parameswaran <arun.parameswaran@...adcom.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH 2/7] net: phy: Fix the register offsets in Broadcom iProc
 mdio mux driver

On Thu, Jul 26, 2018 at 11:36:19AM -0700, Arun Parameswaran wrote:
> Modify the register offsets in the Broadcom iProc mdio mux to start
> from the top of the register address space.
> 
> Earlier the base address specified was from the middle of the block's
> register space. The base address will now point to the start of the
> mdio's address space. The offsets have been fixed to match this.

Hi Arun

Did you consider a change something like:

diff --git a/drivers/net/phy/mdio-mux-bcm-iproc.c b/drivers/net/phy/mdio-mux-bcm-iproc.c
index 0831b7142df7..2d53e609498c 100644
--- a/drivers/net/phy/mdio-mux-bcm-iproc.c
+++ b/drivers/net/phy/mdio-mux-bcm-iproc.c
@@ -169,6 +169,12 @@ static int mdio_mux_iproc_probe(struct platform_device *pdev)
        md->dev = &pdev->dev;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+       if (res->start & 0xfff != 0) {
+               dev_info(&pdev->dev, "Please upgrade your device tree blob.\n");
+               res->start &= ~0xfff;
+       }
+
        md->base = devm_ioremap_resource(&pdev->dev, res);
        if (IS_ERR(md->base)) {
                dev_err(&pdev->dev, "failed to ioremap register\n");


	Andrew