linux-kernel - Re: [v5, 2/3] interconnect: qcom: Add SC7180 interconnect provider driver

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Message-ID: <CAE=gft5LE=_hBLbkWHDAQ6O9vrbfF=LtS7B=1tWWDE3euZov_g@mail.gmail.com>
Date:   Mon, 9 Mar 2020 10:33:45 -0700
From:   Evan Green <evgreen@...gle.com>
To:     Odelu Kukatla <okukatla@...eaurora.org>
Cc:     Georgi Djakov <georgi.djakov@...aro.org>,
        David Dai <daidavid1@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        linux-pm@...r.kernel.org, sboyd@...nel.org,
        Lina Iyer <ilina@...eaurora.org>,
        Sean Sweeney <seansw@....qualcomm.com>,
        Alex Elder <elder@...aro.org>,
        linux-arm-msm-owner@...r.kernel.org
Subject: Re: [v5, 2/3] interconnect: qcom: Add SC7180 interconnect provider driver

On Tue, Mar 3, 2020 at 5:18 AM Odelu Kukatla <okukatla@...eaurora.org> wrote:
>
> Add driver for the Qualcomm interconnect buses found in SC7180 based
> platforms. The topology consists of several NoCs that are controlled by
> a remote processor that collects the aggregated bandwidth for each
> master-slave pairs.
>
> Signed-off-by: Odelu Kukatla <okukatla@...eaurora.org>
> ---
>  drivers/interconnect/qcom/Kconfig  |  10 +
>  drivers/interconnect/qcom/Makefile |   2 +
>  drivers/interconnect/qcom/sc7180.c | 641 +++++++++++++++++++++++++++++++++++++
>  drivers/interconnect/qcom/sc7180.h | 149 +++++++++
>  4 files changed, 802 insertions(+)
>  create mode 100644 drivers/interconnect/qcom/sc7180.c
>  create mode 100644 drivers/interconnect/qcom/sc7180.h
>
> diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig
> index f6418a6..482c5be 100644
> --- a/drivers/interconnect/qcom/Kconfig
> +++ b/drivers/interconnect/qcom/Kconfig
> @@ -42,6 +42,16 @@ config INTERCONNECT_QCOM_RPMH
>         depends on INTERCONNECT_QCOM || COMPILE_TEST
>         depends on QCOM_COMMAND_DB
>
> +config INTERCONNECT_QCOM_SC7180
> +       tristate "Qualcomm SC7180 interconnect driver"
> +       depends on INTERCONNECT_QCOM
> +       depends on (QCOM_RPMH && QCOM_COMMAND_DB && OF) || COMPILE_TEST
> +       select INTERCONNECT_QCOM_RPMH
> +       select INTERCONNECT_QCOM_BCM_VOTER
> +       help
> +         This is a driver for the Qualcomm Network-on-Chip on sc7180-based
> +         platforms.
> +
>  config INTERCONNECT_QCOM_SDM845
>         tristate "Qualcomm SDM845 interconnect driver"
>         depends on INTERCONNECT_QCOM
> diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile
> index d591bb5..5325558 100644
> --- a/drivers/interconnect/qcom/Makefile
> +++ b/drivers/interconnect/qcom/Makefile
> @@ -5,6 +5,7 @@ qnoc-msm8916-objs                       := msm8916.o
>  qnoc-msm8974-objs                      := msm8974.o
>  qnoc-qcs404-objs                       := qcs404.o
>  icc-rpmh-obj                           := icc-rpmh.o
> +qnoc-sc7180-objs                       := sc7180.o
>  qnoc-sdm845-objs                       := sdm845.o
>  icc-smd-rpm-objs                       := smd-rpm.o
>
> @@ -13,5 +14,6 @@ obj-$(CONFIG_INTERCONNECT_QCOM_MSM8916) += qnoc-msm8916.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_MSM8974) += qnoc-msm8974.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_QCS404) += qnoc-qcs404.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_RPMH) += icc-rpmh.o
> +obj-$(CONFIG_INTERCONNECT_QCOM_SC7180) += qnoc-sc7180.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_SDM845) += qnoc-sdm845.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_SMD_RPM) += icc-smd-rpm.o
> diff --git a/drivers/interconnect/qcom/sc7180.c b/drivers/interconnect/qcom/sc7180.c
> new file mode 100644
> index 0000000..dcf493d
> --- /dev/null
> +++ b/drivers/interconnect/qcom/sc7180.c
> @@ -0,0 +1,641 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2020, The Linux Foundation. All rights reserved.
> + *
> + */
> +
> +#include <linux/device.h>
> +#include <linux/interconnect.h>
> +#include <linux/interconnect-provider.h>
> +#include <linux/module.h>
> +#include <linux/of_platform.h>

Nit: As Georgi mentioned in the previous review, you can remove this
an replace it with of_device.h. No need to spin for just that, though.

Reviewed-by: Evan Green <evgreen@...omium.org>