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: <sta...@vger.kernel.org> # 4.19
Fixes: 5828729bebbb ("soc: sunxi: export a regmap for EMAC clock reg on A64")
Signed-off-by: Samuel Holland <sam...@sholland.org>
---
changes from v1:
 - add stable@ and Fixes: tag

---
 drivers/soc/sunxi/Kconfig | 1 +
 drivers/usb/musb/Kconfig  | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/sunxi/Kconfig b/drivers/soc/sunxi/Kconfig
index 353b07e40176..e84eb4e59f58 100644
--- a/drivers/soc/sunxi/Kconfig
+++ b/drivers/soc/sunxi/Kconfig
@@ -4,6 +4,7 @@
 config SUNXI_SRAM
        bool
        default ARCH_SUNXI
+       select REGMAP_MMIO
        help
          Say y here to enable the SRAM controller support. This
          device is responsible on mapping the SRAM in the sunXi SoCs
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index ad08895e78f9..c3dae7d5cb6e 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -66,7 +66,7 @@ config USB_MUSB_SUNXI
        depends on NOP_USB_XCEIV
        depends on PHY_SUN4I_USB
        depends on EXTCON
-       depends on GENERIC_PHY
+       select GENERIC_PHY
        select SUNXI_SRAM
 
 config USB_MUSB_DAVINCI
-- 
2.21.0

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