linux-kernel - [PATCH 2/4] soc: qcom: pmic_glink: Introduce base PMIC GLINK driver

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Date:   Wed, 26 Oct 2022 12:52:26 -0700
From:   Subbaraman Narayanamurthy <quic_subbaram@...cinc.com>
To:     <bjorn.andersson@...aro.org>
CC:     <agross@...nel.org>, <devicetree@...r.kernel.org>,
        <konrad.dybcio@...ainline.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-pm@...r.kernel.org>, <robh+dt@...nel.org>, <sre@...nel.org>
Subject: [PATCH 2/4] soc: qcom: pmic_glink: Introduce base PMIC GLINK driver

> +static struct pmic_glink *__pmic_glink;
> +static DEFINE_MUTEX(__pmic_glink_lock);

Having this global device and lock to update pmic_glink struct pointer
might not work well if there are multiple pmic_glink devices that
corresponds to multiple pmic_glink channels (or rpmsg devices). This
is fine for the primary pmic_glink channel that supports mission mode
clients. However, to support debugging, there could be a secondary
pmic_glink channel and some clients under it.

> +struct pmic_glink_client {
> +	struct list_head node;
> +
> +	struct pmic_glink *pmic;

It would be good to name this pointer as "pg" or something.