linux-kernel - Re: [PATCH V8 0/8] Add interconnect support to QSPI and QUP drivers

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Message-ID: <20200625045720.GV128451@builder.lan>
Date:   Wed, 24 Jun 2020 21:57:20 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Akash Asthana <akashast@...eaurora.org>
Cc:     gregkh@...uxfoundation.org, agross@...nel.org, wsa@...-dreams.de,
        broonie@...nel.org, linux-i2c@...r.kernel.org,
        linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
        swboyd@...omium.org, mgautam@...eaurora.org,
        linux-arm-msm@...r.kernel.org, linux-serial@...r.kernel.org,
        mka@...omium.org, dianders@...omium.org, evgreen@...eaurora.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V8 0/8] Add interconnect support to QSPI and QUP drivers

On Tue 23 Jun 03:38 PDT 2020, Akash Asthana wrote:

> This patch series is based on tag "next-20200622" of linux-next tree.
> 

Series applied to the qcom tree, thank you and thanks for the Acks.

Regards,
Bjorn

> High level design:
>  - QUP wrapper/common driver.
>    Vote for QUP core on behalf of earlycon from probe.
>    Remove BW vote during earlycon exit call
> 
>  - SERIAL driver.
>    Vote only for CPU/CORE path because driver is in FIFO mode only
>    Vote/unvote from qcom_geni_serial_pm func.
>    Bump up the CPU vote from set_termios call based on real time need
> 
>  - I2C driver.
>    Vote for CORE/CPU/DDR path
>    Vote/unvote from runtime resume/suspend callback
>    As bus speed for I2C is fixed from probe itself no need for bump up.
> 
>  - SPI QUP driver.
>    Vote only for CPU/CORE path because driver is in FIFO mode only
>    Vote/unvote from runtime resume/suspend callback
>    Bump up CPU vote based on real time need per transfer.
> 
>  - QSPI driver.
>    Vote only for CPU path
>    Vote/unvote from runtime resume/suspend callback
>    Bump up CPU vote based on real time need per transfer.
> 
> Changes in V2:
>  - Add devm_of_icc_get() API interconnect core.
>  - Add ICC support to common driver to fix earlyconsole crash.
> 
> Changes in V3:
>  - Define common ICC APIs in geni-se driver and use it across geni based
>    I2C,SPI and UART driver.
> 
> Changes in V4:
>  - Add a patch to ICC core to scale peak requirement
>    as twice of average if it is not mentioned explicilty.
> 
> Changes in V5:
>  - As per Georgi's suggestion removed patch from ICC core for assuming
>    peak_bw as twice of average when it's not mentioned, instead assume it
>    equall to avg_bw and keep this assumption in ICC client itself.
>  - As per Matthias suggestion use enum for GENI QUP ICC paths.
> 
> Changes in V6:
>  - No Major change
> 
> Changes in V7:
>  - As per Matthias's comment removed usage of peak_bw variable because we don't
>    have explicit peak requirement, we were voting peak = avg and this can be
>    tracked using single variable for avg bw.
>  - As per Matthias's comment improved print log.
> 
> Changes in V8:
>  - Add [PATCH V8 5/8] to factor out common code for clock setting.
>  - Combine ICC voting and clock setting to single API. [PATCH V8 6/8]
>  - Add ICC voting per transfer because in case of multi message,
>    transfer frequency can vary for each message/transfer.[PATCH V8 6/8]
> 
> Akash Asthana (7):
>   soc: qcom: geni: Support for ICC voting
>   soc: qcom-geni-se: Add interconnect support to fix earlycon crash
>   i2c: i2c-qcom-geni: Add interconnect support
>   tty: serial: qcom_geni_serial: Add interconnect support
>   spi: spi-geni-qcom: Add interconnect support
>   spi: spi-qcom-qspi: Add interconnect support
>   arm64: dts: sc7180: Add interconnect for QUP and QSPI
> 
> Douglas Anderson (1):
>   spi: spi-geni-qcom: Combine the clock setting code
> 
>  arch/arm64/boot/dts/qcom/sc7180.dtsi  | 127 ++++++++++++++++++++++++++++
>  drivers/i2c/busses/i2c-qcom-geni.c    |  26 +++++-
>  drivers/soc/qcom/qcom-geni-se.c       | 150 ++++++++++++++++++++++++++++++++++
>  drivers/spi/spi-geni-qcom.c           | 100 +++++++++++++++--------
>  drivers/spi/spi-qcom-qspi.c           |  56 ++++++++++++-
>  drivers/tty/serial/qcom_geni_serial.c |  38 ++++++++-
>  include/linux/qcom-geni-se.h          |  40 +++++++++
>  7 files changed, 496 insertions(+), 41 deletions(-)
> 
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,\na Linux Foundation Collaborative Project
>