Messages in this thread | | | Subject | Re: [PATCH v2 08/16] mmc: sdhci-omap: Add support to override f_max and iodelay from pdata | From | Kishon Vijay Abraham I <> | Date | Fri, 16 Feb 2018 13:38:51 +0530 |
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Hi,
On Wednesday 14 February 2018 10:54 PM, Tony Lindgren wrote: > * Ulf Hansson <ulf.hansson@linaro.org> [180214 09:53]: >> On 5 February 2018 at 13:50, Kishon Vijay Abraham I <kishon@ti.com> wrote: >>> DRA74x EVM Rev H EVM comes with revision 2.0 silicon. However, earlier >>> versions of EVM can come with either revision 1.1 or revision 1.0 of >>> silicon. >>> >>> The device-tree file is written to support rev 2.0 of silicon. >>> pdata-quirks are used to then override the settings needed for >>> PG 1.1 silicon. >>> >>> PG 1.1 silicon has limitations w.r.t frequencies at which MMC1/2/3 >>> can operate as well as different IOdelay numbers. >> >> I fail to understand the need for platform data. Why can't DT be used >> for the older revisions as well?
It was decided to have dt file for a single soc revision. So the default dts corresponds to rev 2.0. > > Maybe the silicon revision is not available via soc_device_match()?
hmm.. looks like we can get rid of pdata if we use soc_device_match. Thanks for the hint.
Regards Kishon
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