Messages in this thread | | | Subject | Re: [PATCH v4 0/7] cpufreq support for Raspberry Pi | From | Stefan Wahren <> | Date | Thu, 13 Jun 2019 06:31:56 +0200 |
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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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