From: Brian Masney <masneyb@kernel.org>
To: Johnny Liu <johnliu@nvidia.com>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Thierry Reding <thierry.reding@kernel.org>,
Jonathan Hunter <jonathanh@nvidia.com>,
Prashant Gaikwad <pgaikwad@nvidia.com>,
Stephen Boyd <sboyd@kernel.org>,
Brian Masney <bmasney+clk@redhat.com>,
Jerome Brunet <jbrunet+clk@baylibre.com>,
Douglas Anderson <dianders@chromium.org>,
Aniruddha Rao <anrao@nvidia.com>,
devicetree@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org
Subject: Re: [PATCH v3 4/4] clk: tegra: bpmp: Do not cache the EMC clock rate
Date: Thu, 12 Nov 2026 06:59:11 -0500 [thread overview]
Message-ID: <avWqD-Rm5-85Dj5c@x1g10> (raw)
In-Reply-To: <20261102121202.2431928-5-johnliu@nvidia.com>
On Mon, Nov 02, 2026 at 12:12:02PM +0000, Johnny Liu wrote:
> EMC clock scaling is managed by the BPMP itself without kernel
> involvement. When the rate changes on the BPMP side, clk_get_rate() on
> the kernel side returns the stale value cached by the common clock
> framework instead of the rate programmed by the BPMP.
>
> Set CLK_GET_RATE_NOCACHE on the EMC clock, identified by the per-SoC
> emc_clk_id from the BPMP SoC data, so that rate queries are forwarded to
> the BPMP.
>
> Signed-off-by: Johnny Liu <johnliu@nvidia.com>
Acked-by: Brian Masney <masneyb@kernel.org>
next prev parent reply other threads:[~2026-11-12 11:59 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-02 12:11 [PATCH v3 0/4] Add Tegra238 BPMP support and fix stale " Johnny Liu
2026-11-02 12:11 ` [PATCH v3 1/4] dt-bindings: firmware: tegra186-bpmp: Add Tegra238 BPMP Johnny Liu
2026-11-02 13:12 ` Johnny Liu
2026-11-02 12:12 ` [PATCH v3 2/4] firmware: tegra: bpmp: Add per-SoC EMC clock ID Johnny Liu
2026-11-02 12:12 ` [PATCH v3 3/4] firmware: tegra: bpmp: Add Tegra238 support Johnny Liu
2026-11-02 12:12 ` [PATCH v3 4/4] clk: tegra: bpmp: Do not cache the EMC clock rate Johnny Liu
2026-11-12 11:59 ` Brian Masney [this message]
2026-11-03 6:25 ` [PATCH v3 0/4] Add Tegra238 BPMP support and fix stale " Mikko Perttunen
2026-11-12 1:20 ` Johnny Liu
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