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Add support for MAX8997 Clock Driver

Krzysztof Kozlowski linux-arm-kernel linux-clk linux-devicetree linux-samsung-soc 1 version New

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b4 am 20161107172734.GA4865@kozik-lap

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  1. v1 Latest2 of 6 patches 0 repliesNew

2 of 6 patches are in this archive. The cover letter announces 6.

Patches in v1 No applies recorded yet

#Subject and filesSizeRepliesApplied
3/6clk: Add driver for Maxim-8997 PMIC clocks+0 -00 replies
6/6ARM: dts: Extend the S3C RTC node with rtc_src clock+0 -00 replies

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No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.

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Cover letter [PATCH 0/6] Add support for MAX8997 Clock Driver
Quoted 14 lines · Pankaj Dubey

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.

Quoted 3 lines

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

Quoted 27 lines

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
Signature · 1 line
2.7.4

Read the cover letter in its thread