linux-kernel - Re: [PATCH v2 3/7] soc: qcom: Add AOSS QMP genpd provider

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Date:   Mon, 14 Jan 2019 14:40:53 -0800
From:   Stephen Boyd <swboyd@...omium.org>
To:     Andy Gross <andy.gross@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     Russell King <linux@...linux.org.uk>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Arun Kumar Neelakantam <aneela@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/7] soc: qcom: Add AOSS QMP genpd provider

Quoting Bjorn Andersson (2019-01-06 00:09:11)
> diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig
> index dda19471057f..d81256ef5055 100644
> --- a/drivers/soc/qcom/Kconfig
> +++ b/drivers/soc/qcom/Kconfig
> @@ -12,6 +12,15 @@ config QCOM_AOSS_QMP
>           micro-controller in the AOSS, using QMP, to control certain resource
>           that are not exposed through RPMh.
>  
> +config QCOM_AOSS_QMP_PD
> +       tristate "Qualcomm AOSS Messaging Power Domain driver"
> +       depends on QCOM_AOSS_QMP
> +       select PM_GENERIC_DOMAINS
> +       help
> +         This driver provides the means of controlling the AOSSs handling of

Is that possesive? AOSS's?

> +         low-power state for resources related to the remoteproc subsystems as
> +         well as controlling the debug clocks.
> +
>  config QCOM_COMMAND_DB
>         bool "Qualcomm Command DB"
>         depends on ARCH_QCOM || COMPILE_TEST
> diff --git a/drivers/soc/qcom/aoss-qmp-pd.c b/drivers/soc/qcom/aoss-qmp-pd.c
> new file mode 100644
> index 000000000000..62b8fcb9d09e
> --- /dev/null
> +++ b/drivers/soc/qcom/aoss-qmp-pd.c
> @@ -0,0 +1,135 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018, Linaro Ltd
> + */
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/pm_domain.h>
> +#include <linux/soc/qcom/aoss-qmp.h>
> +#include <dt-bindings/power/qcom-aoss-qmp.h>
> +
> +struct qmp_pd {
> +       struct qmp *qmp;
> +
> +       struct generic_pm_domain pd;
> +
> +       const char *name;
> +};
> +
> +#define to_qmp_pd_resource(res) container_of(res, struct qmp_pd, pd)
> +
> +struct qmp_pd_resource {
> +       const char *name;
> +       int (*on)(struct generic_pm_domain *domain);
> +       int (*off)(struct generic_pm_domain *domain);
> +};
> +
> +static int qmp_pd_clock_toggle(struct qmp_pd *res, bool enable)
> +{
> +       char buf[96];

Is 96 calculated from somewhere? Can it be a define because it's quite
magical.