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Date:   Thu, 4 Apr 2019 10:34:59 -0500
From:   Bin Liu <b-liu@ti.com>
To:     Maxime Ripard <maxime.ripard@bootlin.com>
CC:     Samuel Holland <samuel@sholland.org>, Chen-Yu Tsai <wens@csie.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <linux-usb@vger.kernel.org>,
        <linux-sunxi@googlegroups.com>, <stable@vger.kernel.org>
Subject: Re: [PATCH v2] soc: sunxi: Fix missing dependency on REGMAP_MMIO
Message-ID: <20190404153459.GT25852@uda0271908>
Mail-Followup-To: Bin Liu <b-liu@ti.com>,
        Maxime Ripard <maxime.ripard@bootlin.com>,
        Samuel Holland <samuel@sholland.org>, Chen-Yu Tsai <wens@csie.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-usb@vger.kernel.org, linux-sunxi@googlegroups.com,
        stable@vger.kernel.org
References: <20190401220331.44720-1-samuel@sholland.org>
 <20190402060901.rowpoenurzbolyby@flea>
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On Tue, Apr 02, 2019 at 08:09:01AM +0200, Maxime Ripard wrote:
> On Mon, Apr 01, 2019 at 05:03:31PM -0500, Samuel Holland wrote:
> > When enabling ARCH_SUNXI from allnoconfig, SUNXI_SRAM is enabled, but
> > not REGMAP_MMIO, so the kernel fails to link with an undefined reference
> > to __devm_regmap_init_mmio_clk. Select REGMAP_MMIO, as suggested in
> > drivers/base/regmap/Kconfig.
> >
> > This creates the following dependency loop:
> >
> >   drivers/of/Kconfig:68:                symbol OF_IRQ depends on IRQ_DOMAIN
> >   kernel/irq/Kconfig:63:                symbol IRQ_DOMAIN is selected by REGMAP
> >   drivers/base/regmap/Kconfig:7:        symbol REGMAP default is visible depending on REGMAP_MMIO
> >   drivers/base/regmap/Kconfig:39:       symbol REGMAP_MMIO is selected by SUNXI_SRAM
> >   drivers/soc/sunxi/Kconfig:4:          symbol SUNXI_SRAM is selected by USB_MUSB_SUNXI
> >   drivers/usb/musb/Kconfig:63:          symbol USB_MUSB_SUNXI depends on GENERIC_PHY
> >   drivers/phy/Kconfig:7:                symbol GENERIC_PHY is selected by PHY_BCM_NS_USB3
> >   drivers/phy/broadcom/Kconfig:29:      symbol PHY_BCM_NS_USB3 depends on MDIO_BUS
> >   drivers/net/phy/Kconfig:12:           symbol MDIO_BUS default is visible depending on PHYLIB
> >   drivers/net/phy/Kconfig:181:          symbol PHYLIB is selected by ARC_EMAC_CORE
> >   drivers/net/ethernet/arc/Kconfig:18:  symbol ARC_EMAC_CORE is selected by ARC_EMAC
> >   drivers/net/ethernet/arc/Kconfig:24:  symbol ARC_EMAC depends on OF_IRQ
> >
> > To fix the circular dependency, make USB_MUSB_SUNXI select GENERIC_PHY
> > instead of depending on it. This matches the use of GENERIC_PHY by all
> > but two other drivers.
> >
> > Cc: <stable@vger.kernel.org> # 4.19
> > Fixes: 5828729bebbb ("soc: sunxi: export a regmap for EMAC clock reg on A64")
> > Signed-off-by: Samuel Holland <samuel@sholland.org>
> 
> Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>

The patch is applied.

Thanks,
-Bin.