[PATCH v2] clk: exynos4: Fix wrong clock for Exynos4x12 ADC

Krzysztof Kozlowski k.kozlowski at samsung.com
Tue Jul 21 16:41:01 PDT 2015

On 22.07.2015 07:42, Stephen Boyd wrote:
> On 06/12, Krzysztof Kozlowski wrote:
>> The TSADC gate clock was used in Exynos4x12 DTSI for exynos-adc driver.
>> However TSADC is present only on Exynos4210 so on Trats2 board (with
>> Exynos4412 SoC) the exynos-adc driver could not be probed:
>>    ERROR: could not get clock /adc at 126C0000:adc(0)
>>    exynos-adc 126c0000.adc: failed getting clock, err = -2
>>    exynos-adc: probe of 126c0000.adc failed with error -2
>> Instead on Exynos4x12 SoCs the main clock used by Analog to Digital
>> Converter is located in different register and it is named in datasheet
>> as PCLK_ADC. Regardless of the name the purpose of this PCLK_ADC clock
>> is the same as purpose of TSADC from Exynos4210.
>> The patch adds gate clock for Exynos4x12 using the proper register so
>> backward compatibility is preserved. This fixes the probe of exynos-adc
>> driver on Exynos4x12 boards and allows accessing sensors connected to it
>> on Trats2 board (ntc,ncp15wb473 AP and battery thermistors).
>> Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>
>> Cc: <stable at vger.kernel.org>
>> Fixes: c63c57433003 ("ARM: dts: Add ADC's dt data to read raw data for exynos4x12")
>> Link: https://lkml.org/lkml/2015/6/11/85
> Did you want clk maintainers to apply this? The To: list is not
> helping so I'm not sure what's going on and it seems to have
> slipped through the cracks.

Thank you for being proactive! I appreciate this.
Some time ago Sylwester replied that he took care about this patch so I
think this will go through Samsung clock tree.

Sylwester, are you planning to send this as fix for 4.2-rc?

Best regards,

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