Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1267116

Re: [PATCH v2 16/16] mmc: host: omap_hsmmc: use "mmc_of_parse_voltage" to get ocr_avail

Show all headers | View raw

On 11 November 2015 at 11:26, Roger Quadros <rogerq@ti.com> wrote:
> Hi,
>
> On 25/08/15 17:50, Ulf Hansson wrote:
>> On 3 August 2015 at 14:26, Kishon Vijay Abraham I <kishon@ti.com> wrote:
>>> From: Roger Quadros <rogerq@ti.com>
>>>
>>> For platforms that doesn't have explicit regulator control in MMC,
>>> populate voltage-ranges in MMC device tree node and use
>>> mmc_of_parse_voltage to get ocr_avail
>>
>> I don't like this.
>>
>> If we are able to fetch the OCR mask via an external regulator, that
>> shall be done.
>
> Agreed.
>>
>> I think the mmc_of_parse_voltage() API and the corresponding DT
>> binding it parses, should be used for those HW when we don't have an
>> external regulator to use. For example if the MMC controller itself
>> somehow controls the voltage levels. Is that really the case for you?
>
> What shall be done if there is no software control of the external regulator
> and it is fixed at a certain voltage?

I think you can model that as a so called fixed regulator.

Kind regards
Uffe
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Re: [PATCH v2 16/16] mmc: host: omap_hsmmc: use  "mmc_of_parse_voltage" to get ocr_avail Roger Quadros <rogerq@ti.com> - 2015-11-11 11:30 +0100
  Re: [PATCH v2 16/16] mmc: host: omap_hsmmc: use "mmc_of_parse_voltage"  to get ocr_avail Ulf Hansson <ulf.hansson@linaro.org> - 2015-11-11 12:50 +0100

csiph-web