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From: Naveen Krishna Ch <naveenkrishna.ch@gmail.com>
To: Doug Anderson <dianders@chromium.org>
Cc: Jonathan Cameron <jic23@kernel.org>,
	Kukjin Kim <kgene.kim@samsung.com>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Naveen Krishna Chatradhi <ch.naveen@samsung.com>,
	Olof Johansson <olof@lixom.net>,
	Guenter Roeck <linux@roeck-us.net>,
	Grant Likely <grant.likely@secretlab.ca>,
	Rob Herring <rob.herring@calxeda.com>,
	Rob Landley <rob@landley.net>, Jonathan Cameron <jic23@cam.ac.uk>,
	devicetree-discuss@lists.ozlabs.org, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org
Subject: Re: [PATCH v2 2/4] iio: adc: Add dt support for turning on the phy in exynos-adc
Date: Fri, 15 Mar 2013 21:13:07 +0530
Message-ID: <CAHfPSqCqeRJ-VABi22Q0M33LFFRS_QnK_zGM28j1UPhrRvK-+Q@mail.gmail.com> (raw)
In-Reply-To: <CAHfPSqCJVGsERi+jNTSYOJTCL0H-ytAcLTLb+7fQnFK1KGqkyg@mail.gmail.com>

On 15 March 2013 17:15, Naveen Krishna Ch <naveenkrishna.ch@gmail.com> wrote:
> On 14 March 2013 02:10, Doug Anderson <dianders@chromium.org> wrote:
>> Without this change the exynos adc controller needed to have its phy
>> enabled in some out-of-driver C code.  Add support for specifying the
>> phy enable register by listing it in the reg list.
>>
>> Signed-off-by: Doug Anderson <dianders@chromium.org>
Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com>
I used this in mach file for testing. But this one worked aswell.

>
> Worked for me, Its needed for Exynos5250 and future versions too.
> Tested on SMDK5250.
>> ---
>> Changes in v2: None
>>
>>  .../devicetree/bindings/arm/samsung/exynos-adc.txt         |  4 ++--
>>  drivers/iio/adc/exynos_adc.c                               | 14 +++++++++++++-
>>  2 files changed, 15 insertions(+), 3 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt b/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
>> index 96db940..05be151 100644
>> --- a/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
>> +++ b/Documentation/devicetree/bindings/arm/samsung/exynos-adc.txt
>> @@ -15,7 +15,7 @@ Required properties:
>>                         Must be "samsung,exynos-adc-v2" for
>>                                 future controllers.
>>  - reg:                 Contains ADC register address range (base address and
>> -                       length).
>> +                       length) and the address of the phy enable register.
>>  - interrupts:          Contains the interrupt information for the timer. The
>>                         format is being dependent on which interrupt controller
>>                         the Samsung device uses.
>> @@ -30,7 +30,7 @@ Example: adding device info in dtsi file
>>
>>  adc: adc@12D10000 {
>>         compatible = "samsung,exynos-adc-v1";
>> -       reg = <0x12D10000 0x100>;
>> +       reg = <0x12D10000 0x100>, <0x10040718 0x4>;
>>         interrupts = <0 106 0>;
>>         #io-channel-cells = <1>;
>>         io-channel-ranges;
>> diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
>> index ed6fdd7..5ab0dfd 100644
>> --- a/drivers/iio/adc/exynos_adc.c
>> +++ b/drivers/iio/adc/exynos_adc.c
>> @@ -85,6 +85,7 @@ enum adc_version {
>>
>>  struct exynos_adc {
>>         void __iomem            *regs;
>> +       void __iomem            *enable_reg;
>>         struct clk              *clk;
>>         unsigned int            irq;
>>         struct regulator        *vdd;
>> @@ -269,13 +270,19 @@ static int exynos_adc_probe(struct platform_device *pdev)
>>         info = iio_priv(indio_dev);
>>
>>         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>> -
>>         info->regs = devm_request_and_ioremap(&pdev->dev, mem);
>>         if (!info->regs) {
>>                 ret = -ENOMEM;
>>                 goto err_iio;
>>         }
>>
>> +       mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
>> +       info->enable_reg = devm_request_and_ioremap(&pdev->dev, mem);
>> +       if (!info->enable_reg) {
>> +               ret = -ENOMEM;
>> +               goto err_iio;
>> +       }
>> +
>>         irq = platform_get_irq(pdev, 0);
>>         if (irq < 0) {
>>                 dev_err(&pdev->dev, "no irq resource?\n");
>> @@ -295,6 +302,8 @@ static int exynos_adc_probe(struct platform_device *pdev)
>>                 goto err_iio;
>>         }
>>
>> +       writel(1, info->enable_reg);
>> +
>>         info->clk = devm_clk_get(&pdev->dev, "adc");
>>         if (IS_ERR(info->clk)) {
>>                 dev_err(&pdev->dev, "failed getting clock, err = %ld\n",
>> @@ -370,6 +379,7 @@ static int exynos_adc_remove(struct platform_device *pdev)
>>                                 exynos_adc_remove_devices);
>>         regulator_disable(info->vdd);
>>         clk_disable_unprepare(info->clk);
>> +       writel(0, info->enable_reg);
>>         iio_device_unregister(indio_dev);
>>         free_irq(info->irq, info);
>>         iio_device_free(indio_dev);
>> @@ -395,6 +405,7 @@ static int exynos_adc_suspend(struct device *dev)
>>         }
>>
>>         clk_disable_unprepare(info->clk);
>> +       writel(0, info->enable_reg);
>>         regulator_disable(info->vdd);
>>
>>         return 0;
>> @@ -410,6 +421,7 @@ static int exynos_adc_resume(struct device *dev)
>>         if (ret)
>>                 return ret;
>>
>> +       writel(1, info->enable_reg);
>>         clk_prepare_enable(info->clk);
>>
>>         exynos_adc_hw_init(info);
>> --
>> 1.8.1.3
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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>> Please read the FAQ at  http://www.tux.org/lkml/
>
>
>
> --
> Shine bright,
> (: Nav :)



--
Shine bright,
(: Nav :)

  reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-12 23:13 [PATCH 0/4] Get exynos adc driver running on on exynos5250-snow Doug Anderson
2013-03-12 23:13 ` [PATCH 1/4] iio: adc: Document the regulator/clocks for exynos-adc Doug Anderson
2013-03-12 23:13 ` [PATCH 2/4] iio: adc: Add dt support for turning on the phy in exynos-adc Doug Anderson
2013-03-12 23:13 ` [PATCH 3/4] ARM: dts: Add adc to exynos5250 device tree file Doug Anderson
2013-03-12 23:13 ` [PATCH 4/4] ARM: dts: Add adc and thermistors for exynos5250-snow Doug Anderson
2013-03-13 20:39 ` [PATCH v2 0/4] This set of patches is based on Naveen Krishna Chatradhi's recent work Doug Anderson
2013-03-13 20:39   ` [PATCH v2 1/4] iio: adc: Document the regulator/clocks for exynos-adc Doug Anderson
2013-03-15  8:05     ` Naveen Krishna Ch
2013-03-27 18:35     ` Naveen Krishna Ch
2013-03-27 18:40       ` Lars-Peter Clausen
2013-03-27 18:46         ` Doug Anderson
2013-03-28  6:31           ` Jonathan Cameron
2013-03-29  9:36           ` Jonathan Cameron
2013-03-13 20:40   ` [PATCH v2 2/4] iio: adc: Add dt support for turning on the phy in exynos-adc Doug Anderson
2013-03-15 11:45     ` Naveen Krishna Ch
2013-03-15 15:43       ` Naveen Krishna Ch [this message]
2013-03-27 18:37     ` Naveen Krishna Ch
2013-03-27 18:44       ` Doug Anderson
2013-03-13 20:40   ` [PATCH v2 3/4] ARM: dts: Add adc to exynos5250 device tree file Doug Anderson
2013-03-15 15:45     ` Naveen Krishna Ch
2013-03-13 20:40   ` [PATCH v2 4/4] ARM: dts: Add adc and thermistors for exynos5250-snow Doug Anderson
2013-03-15 10:24     ` Naveen Krishna Ch
2013-03-15 15:42       ` Naveen Krishna Ch
2013-03-27 18:36         ` Naveen Krishna Ch

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