linux-kernel - Re: [Patch v5 2/4] memory: tegra: Add MC error logging on tegra186 onward

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Message-ID: <55ae43f0-a22f-b532-2476-c3afa1e2cb73@gmail.com>
Date:   Sun, 20 Mar 2022 15:53:21 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Ashish Mhetre <amhetre@...dia.com>,
        krzysztof.kozlowski@...onical.com, robh+dt@...nel.org,
        thierry.reding@...il.com, jonathanh@...dia.com,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org
Cc:     vdumpa@...dia.com, Snikam@...dia.com
Subject: Re: [Patch v5 2/4] memory: tegra: Add MC error logging on tegra186
 onward

16.03.2022 12:25, Ashish Mhetre пишет:
> +static int tegra186_mc_get_channel(const struct tegra_mc *mc, int *mc_channel)
> +{
> +	u32 status;
> +
> +	status = mc_ch_readl(mc, MC_BROADCAST_CHANNEL, MC_GLOBAL_INTSTATUS);
> +
> +	switch (status & mc->soc->int_channel_mask) {
> +	case BIT(0):
> +		*mc_channel = 0;
> +		break;
> +
> +	case BIT(1):
> +		*mc_channel = 1;
> +		break;
> +
> +	case BIT(2):
> +		*mc_channel = 2;
> +		break;
> +
> +	case BIT(3):
> +		*mc_channel = 3;
> +		break;

This won't work if multiple bits are set at once.