From: Wolfram Sang <wsa@the-dreams.de>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
linux-mmc <linux-mmc@vger.kernel.org>,
Al Cooper <alcooperx@gmail.com>,
Jaedon Shin <jaedon.shin@gmail.com>,
Haibo Chen <haibo.chen@nxp.com>,
Dong Aisheng <aisheng.dong@nxp.com>,
Shawn Lin <shawn.lin@rock-chips.com>,
Douglas Anderson <dianders@chromium.org>,
Zach Brown <zach.brown@ni.com>,
Ludovic Desroches <ludovic.desroches@atmel.com>,
Jisheng Zhang <jszhang@marvell.com>,
Yangbo Lu <yangbo.lu@nxp.com>,
Jaehoon Chung <jh80.chung@samsung.com>,
Weijun Yang <Weijun.Yang@csr.com>,
Barry Song <Baohua.Song@csr.com>,
Peter Griffin <peter.griffin@linaro.org>,
Lee Jones <lee.jones@linaro.org>,
Jon Hunter <jonathanh@nvidia.com>,
Harjani Ritesh <riteshh@codeaurora.org>
Subject: Re: [PATCH 07/25] mmc: sdhci-pci: Use ACPI DSM to get driver strength for some Intel devices
Date: Wed, 19 Apr 2017 14:24:20 +0200 [thread overview]
Message-ID: <20170419122419.GA3832@katana> (raw)
In-Reply-To: <47372fbd-9c16-725a-7f25-97481f09a6eb@intel.com>
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> > do you think it makes sense then to have a similar encoded value from DT
> > (maybe "mmc-fixed-driver-type-<n>" with n=0..4)?
>
> The _DSM, being a device-specific method does not have to support different
> devices with different requirements whereas DT does.
So, it is more like a vendor specific property (e.g. "renesas,
mmc-driver-type")? Sorry, I don't know much about ACPI.
> > This is a largely
> > reduced encoding of what you proposed in 2015 [1] but may be more
> > pragmatic for soldered on-board devices working on their max speeds with
> > fixed voltages and frequencies? Or did I get something wrong?
>
> What I proposed was being forced on me by the requirement to provide a
> solution that could meet any conceivable need. That gets over-complicated.
Yeah, that became pretty clear.
> But as you say, in practice people are probably only interested in providing
> one value for the max speed / frequency.
OK. Thanks for your answers! Much appreciated.
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next prev parent reply other threads:[~2017-04-19 12:24 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-20 17:50 [PATCH 00/25] sdhci patches Adrian Hunter
2017-03-20 17:50 ` [PATCH 01/25] mmc: sdhci: Do not disable interrupts while waiting for clock Adrian Hunter
2017-03-20 17:50 ` [PATCH 02/25] mmc: sdhci-pci: Do not disable interrupts in sdhci_intel_set_power Adrian Hunter
2017-03-20 17:50 ` [PATCH 03/25] mmc: sdhci: Optimize delay loops Adrian Hunter
2017-03-20 17:50 ` [PATCH 04/25] mmc: sdhci: Let drivers decide whether to use mmc_retune_needed() with pm Adrian Hunter
2017-03-20 17:50 ` [PATCH 05/25] mmc: sdhci-pci: Let devices define their own private data Adrian Hunter
2017-03-20 17:50 ` [PATCH 06/25] mmc: sdhci-pci: Don't re-tune with runtime pm for some Intel devices Adrian Hunter
2017-03-20 17:50 ` [PATCH 07/25] mmc: sdhci-pci: Use ACPI DSM to get driver strength " Adrian Hunter
2017-04-04 8:48 ` Wolfram Sang
2017-04-19 8:50 ` Adrian Hunter
2017-04-19 12:24 ` Wolfram Sang [this message]
2017-04-19 12:58 ` Adrian Hunter
2017-03-20 17:50 ` [PATCH 08/25] mmc: sdhci: Remove ->select_drive_strength() callback Adrian Hunter
2017-03-20 17:50 ` [PATCH 09/25] mmc: sdhci: Do not use spin lock in set_ios paths Adrian Hunter
2017-03-20 17:50 ` [PATCH 10/25] mmc: sdhci: Reduce spin lock usage in sdhci_execute_tuning Adrian Hunter
2017-03-20 17:50 ` [PATCH 11/25] mmc: sdhci: Improve debug print format Adrian Hunter
2017-03-20 17:50 ` [PATCH 12/25] mmc: sdhci: Add response register to register dump Adrian Hunter
2017-03-20 17:50 ` [PATCH 13/25] mmc: sdhci: Use sdhci_readl() not readl() in sdhci_dumpregs() Adrian Hunter
2017-03-20 17:50 ` [PATCH 14/25] mmc: sdhci: Improve register dump print format Adrian Hunter
2017-03-20 17:50 ` [PATCH 15/25] mmc: sdhci: Export sdhci_dumpregs Adrian Hunter
2017-03-20 17:50 ` [PATCH 16/25] mmc: sdhci: Get rid of 'extern' in header file Adrian Hunter
2017-03-20 17:50 ` [PATCH 17/25] mmc: sdhci: Add sdhci_cleanup_host Adrian Hunter
2017-03-20 17:50 ` [PATCH 18/25] mmc: sdhci: Factor out sdhci_set_default_irqs Adrian Hunter
2017-03-20 17:50 ` [PATCH 19/25] mmc: sdhci: Add CQE support Adrian Hunter
2017-03-20 17:50 ` [PATCH 20/25] mmc: sdhci-pci: Let devices define how to add the host Adrian Hunter
2017-03-20 17:50 ` [PATCH 21/25] mmc: sdhci-pci: Do not use suspend/resume callbacks with runtime pm Adrian Hunter
2017-03-20 17:50 ` [PATCH 22/25] mmc: sdhci-pci: Conditionally compile pm sleep functions Adrian Hunter
2017-03-20 17:50 ` [PATCH 23/25] mmc: sdhci-pci: Let suspend/resume callbacks replace default callbacks Adrian Hunter
2017-03-20 17:50 ` [PATCH 24/25] mmc: sdhci-pci: Add runtime suspend/resume callbacks Adrian Hunter
2017-03-20 17:50 ` [PATCH 25/25] mmc: sdhci-pci: Move a function to avoid later forward declaration Adrian Hunter
2017-03-21 10:01 ` [PATCH 00/25] sdhci patches Ulf Hansson
2017-03-21 11:00 ` Lee Jones
2017-03-21 11:54 ` Adrian Hunter
2017-03-21 15:14 ` Lee Jones
2017-03-21 15:17 ` Lee Jones
2017-03-22 8:47 ` Ludovic Desroches
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