From: jh80.chung@samsung•com (Jaehoon Chung)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 1/5] mmc: host: sdhci-s3c: Add broken-voltage DT property for broken voltage quirk
Date: Wed, 19 Sep 2012 20:02:37 +0900 [thread overview]
Message-ID: <5059A64D.6000700@samsung.com> (raw)
In-Reply-To: <m3627aguhl.fsf@pullcord.laptop.org>
Hi,
On 09/19/2012 07:47 PM, Chris Ball wrote:
> Hi,
>
> On Wed, Sep 19 2012, Tomasz Figa wrote:
>> We could just check if the regulator provides the capability to change the
>> voltage.
>>
>> I don't see any direct way of querying the regulator for provided
>> capabilities (correct me if I'm just blind), but calling
>> regulator_count_voltages() on the regulator and checking if the returned
>> value is 1 should be enough to assume that the regulator is fixed.
>
> Sounds good, I agree. Are you able to test that the obvious patch below
> works on your fixed-regulator board?
>
> Jaehoon and Adrian, can you think of any reason why we shouldn't replace
> MMC_CAP2_BROKEN_VOLTAGE with the regulator_count_voltages() call below?
> Thanks.
I think this is better than using MMC_CAP2_BROKEN_VOLTAGE.
I tested with this..and working fine.
Best Regards,
Jaehoon Chung
>
>
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index 044cd01..a3cc740 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1132,7 +1132,7 @@ int mmc_regulator_set_ocr(struct mmc_host *mmc,
> */
> voltage = regulator_get_voltage(supply);
>
> - if (mmc->caps2 & MMC_CAP2_BROKEN_VOLTAGE)
> + if (regulator_count_voltages(supply) == 1)
> min_uV = max_uV = voltage;
>
> if (voltage < 0)
>
next prev parent reply other threads:[~2012-09-19 11:02 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-04 8:50 [PATCH v2 0/5] ARM: EXYNOS: Add support for Trats board using device tree Tomasz Figa
2012-09-04 8:50 ` [PATCH v2 1/5] mmc: host: sdhci-s3c: Add broken-voltage DT property for broken voltage quirk Tomasz Figa
2012-09-05 8:36 ` Jaehoon Chung
2012-09-19 5:42 ` Chris Ball
2012-09-19 10:13 ` Tomasz Figa
2012-09-19 10:24 ` Chris Ball
2012-09-19 10:34 ` Tomasz Figa
2012-09-19 10:47 ` Chris Ball
2012-09-19 10:49 ` Tomasz Figa
2012-09-19 11:02 ` Jaehoon Chung [this message]
2012-09-19 14:39 ` Chris Ball
2012-09-20 5:57 ` Jaehoon Chung
2012-09-04 8:50 ` [PATCH v2 2/5] ARM: Exynos4: dts: Specify address and size cells for i2c controllers Tomasz Figa
2012-09-05 3:58 ` Thomas Abraham
2012-09-08 2:37 ` Kukjin Kim
2012-09-04 8:50 ` [PATCH v2 3/5] ARM: Exynos4: Add OF compatibility lookups for Exynos4 i2c adapters Tomasz Figa
2012-09-05 3:59 ` Thomas Abraham
2012-09-08 2:38 ` Kukjin Kim
2012-09-04 8:50 ` [PATCH v2 4/5] ARM: EXYNOS: Increase maximum possible memory bank size to 512MiB Tomasz Figa
2012-09-08 2:41 ` Kukjin Kim
2012-09-08 8:15 ` Tomasz Figa
2012-09-04 8:50 ` [PATCH v2 5/5] ARM: Exynos: Add basic dts file for Samsung Trats board Tomasz Figa
2012-09-05 4:05 ` Thomas Abraham
2012-09-05 5:53 ` Tomasz Figa
2012-09-08 2:47 ` Kukjin Kim
2012-09-08 8:21 ` Tomasz Figa
2012-09-19 23:49 ` Kukjin Kim
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