From: Andrew Lunn <andrew@lunn.ch>
To: Arun Parameswaran <arun.parameswaran@broadcom.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Florian Fainelli <f.fainelli@gmail.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>, Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
netdev@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com
Subject: Re: [PATCH 7/7] net: phy: Add pm support for scan ctrl register to bcm mdio mux
Date: Thu, 26 Jul 2018 21:36:34 +0200 [thread overview]
Message-ID: <20180726193634.GM10686@lunn.ch> (raw)
In-Reply-To: <170a4731-b091-aef4-2d66-2950114e41fc@broadcom.com>
On Thu, Jul 26, 2018 at 12:33:05PM -0700, Arun Parameswaran wrote:
>
>
> On 18-07-26 12:20 PM, Andrew Lunn wrote:
> > On Thu, Jul 26, 2018 at 11:36:24AM -0700, Arun Parameswaran wrote:
> >> Add support for saving and restoring the 'scan control' register
> >> in the Broadcom iProc mdio mux driver.
> >
> > Hi Arun
> >
> > I don't see anything setting this register. So why is it necessary to
> > save it over suspend/resume?
> >
> > Andrew
> >
> Hi Andrew
> In the Omega SoC (only), this register was defaulted incorrectly (to use
> a test mode) by the hardware. So we added the setup of the register to
> the early bootloader (ATF).
>
> We still need to restore this register while resuming from sleep.
Hi Arun
It is better to not rely on the bootloader and have the driver do it.
That makes it easier for people to swap to alternative bootloaders.
Andrew
next prev parent reply other threads:[~2018-07-26 19:36 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-26 18:36 [PATCH 0/7] Add clock config and pm support to bcm iProc mdio mux Arun Parameswaran
2018-07-26 18:36 ` [PATCH 1/7] dt-bindings: net: Fix Broadcom iProc mdio mux driver base address Arun Parameswaran
2018-07-26 19:01 ` Andrew Lunn
2018-07-26 19:15 ` Arun Parameswaran
2018-07-26 18:36 ` [PATCH 2/7] net: phy: Fix the register offsets in Broadcom iProc mdio mux driver Arun Parameswaran
2018-07-26 19:06 ` Andrew Lunn
2018-07-26 19:16 ` Arun Parameswaran
2018-07-26 19:25 ` Ray Jui
2018-07-26 19:29 ` Andrew Lunn
2018-07-26 18:36 ` [PATCH 3/7] arm64: dts: Fix the base address of the Broadcom iProc mdio mux Arun Parameswaran
2018-07-26 18:36 ` [PATCH 4/7] dt-bindings: net: Add clock handle to " Arun Parameswaran
2018-07-26 18:36 ` [PATCH 5/7] net: phy: Add support to configure clock in " Arun Parameswaran
2018-07-26 19:13 ` Andrew Lunn
2018-07-26 19:20 ` Arun Parameswaran
2018-07-26 19:26 ` Andrew Lunn
2018-07-26 20:00 ` Arun Parameswaran
2018-07-26 18:36 ` [PATCH 6/7] net: phy: Add pm support to Broadcom iProc mdio mux driver Arun Parameswaran
2018-07-26 19:16 ` Andrew Lunn
2018-07-26 18:36 ` [PATCH 7/7] net: phy: Add pm support for scan ctrl register to bcm mdio mux Arun Parameswaran
2018-07-26 19:20 ` Andrew Lunn
2018-07-26 19:33 ` Arun Parameswaran
2018-07-26 19:36 ` Andrew Lunn [this message]
2018-07-26 19:51 ` Arun Parameswaran
2018-07-26 18:52 ` [PATCH 0/7] Add clock config and pm support to bcm iProc " Andrew Lunn
2018-07-26 19:00 ` Arun Parameswaran
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