[PATCH 0/6] Add support for MAX8997 Clock Driver

Krzysztof Kozlowski
2016-11-07T17:27:34Z

On Mon, Nov 07, 2016 at 03:39:30PM +0530, Pankaj Dubey wrote:
> During recent test on Exynos4210 based Origen board, I observed
> RTC1 probe is failing giving following error message:
>
> [ 2.195817] s3c-rtc 10070000.rtc: failed to find rtc source clock
> [ 2.200475] s3c-rtc: probe of 10070000.rtc failed with error -2
> [ 2.206597] i2c /dev entries driver
>
> This is mainly because S3C-RTC expects two clocks "rtc" and "rtc_src".
> In case of Origen board this second clock is supplied by MAX8997 clock
> oscillator.
> This patch series modified MAX8997 MFD driver for supporting regmap, and
> adds max8997-clk driver. Also it documentation where-ever required and
> extends RTC node in exynos4210-origen.dts for supporting both clocks.
>
> After this patch series, RTC is getting probed properly on Origen board.
>
> This patch series is tested for SMP boot on Origen board.

No need to re-invent the wheel:
https://lkml.org/lkml/2016/6/17/57
http://lists.infradead.org/pipermail/linux-arm-kernel/2016-June/437113.html

I won't be sending updates for these patches. Feel free to continue the
work.

BR,
Krzysztof

>
> Pankaj Dubey (6):
> mfd: max8997: Initialize max8997 register map
> dt-bindings: clk: max8997: Add DT binding documentation
> clk: Add driver for Maxim-8997 PMIC clocks
> ARM: dts: Add clock provider specific properties to max8997 node
> mfd: max8997: Add max8997-clk name in mfd_cell
> ARM: dts: Extend the S3C RTC node with rtc_src clock
>
> .../devicetree/bindings/clock/maxim,max8997.txt | 44 +++++++++++++
> .../bindings/regulator/max8997-regulator.txt | 3 +
> arch/arm/boot/dts/exynos4210-origen.dts | 6 +-
> arch/arm/boot/dts/exynos4210-trats.dts | 3 +-
> drivers/clk/Kconfig | 10 +++
> drivers/clk/Makefile | 1 +
> drivers/clk/clk-max8997.c | 76 ++++++++++++++++++++++
> drivers/mfd/max8997.c | 15 +++++
> include/dt-bindings/clock/maxim,max8997.h | 23 +++++++
> include/linux/mfd/max8997-private.h | 3 +
> 10 files changed, 182 insertions(+), 2 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/clock/maxim,max8997.txt
> create mode 100644 drivers/clk/clk-max8997.c
> create mode 100644 include/dt-bindings/clock/maxim,max8997.h
>
> --
> 2.7.4
>