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SubjectRe: [PATCH v4 0/7] cpufreq support for Raspberry Pi
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Hi Florian,
hi Stephen,

Am 13.06.19 um 05:31 schrieb Florian Fainelli:
>
> On 6/12/2019 11:24 AM, Nicolas Saenz Julienne wrote:
>> Hi all,
>> this aims at adding cpufreq support to the Raspberry Pi family of
>> boards.
>>
>> The series first factors out 'pllb' from clk-bcm2385 and creates a new
>> clk driver that operates it over RPi's firmware interface[1]. We are
>> forced to do so as the firmware 'owns' the pll and we're not allowed to
>> change through the register interface directly as we might race with the
>> over-temperature and under-voltage protections provided by the firmware.
>>
>> Next it creates a minimal cpufreq driver that populates the CPU's opp
>> table, and registers cpufreq-dt. Which is needed as the firmware
>> controls the max and min frequencies available.
>>
>> This was tested on a RPi3b+ and RPI2b, both using multi_v7_defconfig and
>> arm64's defconfig.
> How do we go about merging this? Stefan, will you pick up patch 3, 6 and
> 7 and submit them for 5.3/5.4? Viresh has already picked up patch 4.

is it possible to let patches 1,2, 3 and 5 go via clk-tree?

I would take care of 6 and 7.

Stefan

>
>> That's all,
>> kind regards,
>> Nicolas
>>
>> [1] https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface
>>
>> ---
>>
>> Changes since v3:
>> - Fix sparse warnings in clk-raspberrypi.c
>> - Minor cleanups
>>
>> Changes since v2:
>> - Fixed configs to match Stefan's comments
>> - Round OPP frequencies
>> - Rebase onto linux-next
>> - Minor cleanups & checkpatch.pl
>>
>> Changes since v1:
>> - Enabled by default on the whole family of devices
>> - Added/Fixed module support
>> - clk device now registered by firmware driver
>> - raspberrypi-cpufreq device now registered by clk driver
>> - Reimplemented clk rounding unsing determine_rate()
>> - Enabled in configs for arm and arm64
>>
>> Changes since RFC:
>> - Move firmware clk device into own driver
>>
>> Nicolas Saenz Julienne (7):
>> clk: bcm2835: remove pllb
>> clk: bcm283x: add driver interfacing with Raspberry Pi's firmware
>> firmware: raspberrypi: register clk device
>> cpufreq: add driver for Raspberry Pi
>> clk: raspberrypi: register platform device for raspberrypi-cpufreq
>> ARM: defconfig: enable cpufreq driver for RPi
>> arm64: defconfig: enable cpufreq support for RPi3
>>
>> arch/arm/configs/bcm2835_defconfig | 9 +
>> arch/arm/configs/multi_v7_defconfig | 2 +
>> arch/arm64/configs/defconfig | 2 +
>> drivers/clk/bcm/Kconfig | 7 +
>> drivers/clk/bcm/Makefile | 1 +
>> drivers/clk/bcm/clk-bcm2835.c | 28 +--
>> drivers/clk/bcm/clk-raspberrypi.c | 315 ++++++++++++++++++++++++++
>> drivers/cpufreq/Kconfig.arm | 8 +
>> drivers/cpufreq/Makefile | 1 +
>> drivers/cpufreq/raspberrypi-cpufreq.c | 97 ++++++++
>> drivers/firmware/raspberrypi.c | 10 +
>> 11 files changed, 456 insertions(+), 24 deletions(-)
>> create mode 100644 drivers/clk/bcm/clk-raspberrypi.c
>> create mode 100644 drivers/cpufreq/raspberrypi-cpufreq.c
>>

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