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Date:   Fri, 14 Aug 2020 03:06:16 +0300
From:   Dmitry Osipenko <>
To:     Thierry Reding <>,
        Jonathan Hunter <>,
        Georgi Djakov <>,
        Rob Herring <>,
        Michael Turquette <>,
        Stephen Boyd <>,
        Peter De Schrijver <>,
        MyungJoo Ham <>,
        Kyungmin Park <>,
        Chanwoo Choi <>,
        Mikko Perttunen <>
Subject: [PATCH v5 31/36] memory: tegra20-emc: Create tegra20-devfreq device

The tegra20-devfreq driver provides memory frequency scaling functionality
and it uses EMC clock for the scaling. Since tegra20-devfreq is a software
driver, the device for the driver needs to be created manually. Let's do
it from EMC driver since it provides the clk rate-change functionality.

Signed-off-by: Dmitry Osipenko <>
 drivers/memory/tegra/tegra20-emc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c
index 437d9d789941..e603cc0b0341 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -884,6 +884,9 @@ static int tegra_emc_probe(struct platform_device *pdev)
+		platform_device_register_simple("tegra20-devfreq", -1, NULL, 0);
 	 * Don't allow the kernel module to be unloaded. Unloading adds some
 	 * extra complexity which doesn't really worth the effort in a case of

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