linux-kernel - Re: [PATCH 5/5] interconnect: qcom: Add MSM8939 interconnect provider driver

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Message-ID: <39ad2fc8-8604-5529-c2d5-d5b434f19859@linaro.org>
Date:   Tue, 3 Nov 2020 18:45:12 +0200
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     Jun Nie <jun.nie@...aro.org>
Cc:     devicetree@...r.kernel.org, bjorn.andersson@...aro.org,
        agross@...nel.org, linux-pm@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        robh@...nel.org, shawn.guo@...aro.org
Subject: Re: [PATCH 5/5] interconnect: qcom: Add MSM8939 interconnect provider
 driver

On 9/30/20 11:16, Jun Nie wrote:
> Add driver for the Qualcomm interconnect buses found in MSM8939 based
> platforms. The topology consists of four NoCs that are controlled by
> a remote processor that collects the aggregated bandwidth for each
> master-slave pairs.
> 
> Signed-off-by: Jun Nie <jun.nie@...aro.org>
> ---
>  drivers/interconnect/qcom/Kconfig   |   9 +
>  drivers/interconnect/qcom/Makefile  |   2 +
>  drivers/interconnect/qcom/msm8939.c | 355 ++++++++++++++++++++++++++++
>  3 files changed, 366 insertions(+)
>  create mode 100644 drivers/interconnect/qcom/msm8939.c
> 
> diff --git a/drivers/interconnect/qcom/Kconfig b/drivers/interconnect/qcom/Kconfig
> index 25486de5a38d..6395404bfe3f 100644
> --- a/drivers/interconnect/qcom/Kconfig
> +++ b/drivers/interconnect/qcom/Kconfig
> @@ -17,6 +17,15 @@ config INTERCONNECT_QCOM_MSM8916
>  	  This is a driver for the Qualcomm Network-on-Chip on msm8916-based
>  	  platforms.
>  
> +config INTERCONNECT_QCOM_MSM8939
> +	tristate "Qualcomm MSM8939 interconnect driver"
> +	depends on INTERCONNECT_QCOM
> +	depends on QCOM_SMD_RPM
> +	select INTERCONNECT_QCOM_SMD_RPM
> +	help
> +	  This is a driver for the Qualcomm Network-on-Chip on msm8939-based
> +	  platforms.
> +
>  config INTERCONNECT_QCOM_MSM8974
>  	tristate "Qualcomm MSM8974 interconnect driver"
>  	depends on INTERCONNECT_QCOM
> diff --git a/drivers/interconnect/qcom/Makefile b/drivers/interconnect/qcom/Makefile
> index f5e803489de0..84b75022f0d8 100644
> --- a/drivers/interconnect/qcom/Makefile
> +++ b/drivers/interconnect/qcom/Makefile
> @@ -2,6 +2,7 @@
>  
>  icc-bcm-voter-objs			:= bcm-voter.o
>  qnoc-msm8916-objs			:= msm8916.o
> +qnoc-msm8939-objs			:= msm8939.o
>  qnoc-msm8974-objs			:= msm8974.o
>  icc-osm-l3-objs				:= osm-l3.o
>  qnoc-qcs404-objs			:= qcs404.o
> @@ -13,6 +14,7 @@ icc-smd-rpm-objs			:= smd-rpm.o icc-rpm.o
>  
>  obj-$(CONFIG_INTERCONNECT_QCOM_BCM_VOTER) += icc-bcm-voter.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_MSM8916) += qnoc-msm8916.o
> +obj-$(CONFIG_INTERCONNECT_QCOM_MSM8939) += qnoc-msm8939.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_MSM8974) += qnoc-msm8974.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_OSM_L3) += icc-osm-l3.o
>  obj-$(CONFIG_INTERCONNECT_QCOM_QCS404) += qnoc-qcs404.o
> diff --git a/drivers/interconnect/qcom/msm8939.c b/drivers/interconnect/qcom/msm8939.c
> new file mode 100644
> index 000000000000..dfbec30ed149
> --- /dev/null
> +++ b/drivers/interconnect/qcom/msm8939.c
> @@ -0,0 +1,355 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020 Linaro Ltd
> + * Author: Jun Nie <jun.nie@...aro.org>
> + * With reference of msm8916 interconnect driver of Georgi Djakov.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/interconnect-provider.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/of_device.h>

Nit: Move this above platform_device.h to make it sorted.

> +
> +#include <dt-bindings/interconnect/qcom,msm8939.h>
> +
> +#include "smd-rpm.h"
> +#include "icc-rpm.h"
> +
[..]
> +static const struct of_device_id msm8939_noc_of_match[] = {
> +	{ .compatible = "qcom,msm8939-bimc", .data = &msm8939_bimc },
> +	{ .compatible = "qcom,msm8939-pcnoc", .data = &msm8939_pcnoc },
> +	{ .compatible = "qcom,msm8939-snoc", .data = &msm8939_snoc },
> +	{ .compatible = "qcom,msm8939-snoc-mm", .data = &msm8939_snoc_mm },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, msm8939_noc_of_match);
> +
> +static struct platform_driver msm8939_noc_driver = {
> +	.probe = msm8939_qnoc_probe,
> +	.remove = qnoc_remove,
> +	.driver = {
> +		.name = "qnoc-msm8939",
> +		.of_match_table = msm8939_noc_of_match,

The sync_state patches got merged, so please add this:
		.sync_state = icc_sync_state,

Thanks,
Georgi

> +	},
> +};
> +module_platform_driver(msm8939_noc_driver);
> +MODULE_AUTHOR("Jun Nie <jun.nie@...aro.org>");
> +MODULE_DESCRIPTION("Qualcomm MSM8939 NoC driver");
> +MODULE_LICENSE("GPL v2");
>