linux-kernel - [PATCH v5 31/36] memory: tegra20-emc: Create tegra20-devfreq device

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Message-Id: <20200814000621.8415-32-digetx@gmail.com>
Date:   Fri, 14 Aug 2020 03:06:16 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Mikko Perttunen <cyndis@...si.fi>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org
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 <digetx@...il.com>
---
 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)
 	tegra_emc_debugfs_init(emc);
 	tegra_emc_interconnect_init(emc);
 
+	if (IS_ENABLED(CONFIG_ARM_TEGRA20_DEVFREQ))
+		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
-- 
2.27.0