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Date: Mon, 25 Apr 2016 17:20:38 +0200 From: Andrew Lunn <andrew@...n.ch> To: Pramod Kumar <pramod.kumar@...adcom.com> Cc: Rob Herring <robh+dt@...nel.org>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will.deacon@....com>, Masahiro Yamada <yamada.masahiro@...ionext.com>, Chen-Yu Tsai <wens@...e.org>, BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>, Pawel Moll <pawel.moll@....com>, Mark Rutland <mark.rutland@....com>, Arnd Bergmann <arnd@...db.de>, Suzuki K Poulose <suzuki.poulose@....com>, Punit Agrawal <punit.agrawal@....com>, devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: Re: [PATCH 0/6] Add Shared MDIO framework for iProc based SoCs On Thu, Apr 21, 2016 at 02:48:37PM +0530, Pramod Kumar wrote: > Broadcom iProc based SoCs uses MDIO bus for programming PHYs belonging to > different I/O subsystem like USB, SATA, PCIe, ETHERNET etc. Every subsystem > is referred as "Master" When a master is selected, all PHYs belonging to > this subsystem get active on the MDIO bus and responds to MDIO transaction. > In this way one MDIO controller is shared among all masters hence named as > "Shared MDIO controller". > > We have two important entities in "Shared MDIO Bus" framework: > 1) shared_mdio_master and > 2) shared_mdio_driver. > > The shared MDIO controller driver is registered as platform driver and it > creates shared_mdio_master instances and adds them to "Shared MDIO Bus" > framework. Hi Pramod What i'm missing is an explanation why the existing MDIO bus framework cannot be used. I recently made it more generic so that you can hang any type of device off it, not just PHYs. Thanks Andrew
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