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[94.29.37.113]) by smtp.gmail.com with ESMTPSA id s20sm102655lfr.39.2021.07.01.16.28.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 01 Jul 2021 16:28:46 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Ulf Hansson , Viresh Kumar , Stephen Boyd , Peter De Schrijver Cc: linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v7 28/37] memory: tegra20-emc: Add minimal runtime PM support Date: Fri, 2 Jul 2021 02:27:19 +0300 Message-Id: <20210701232728.23591-29-digetx@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210701232728.23591-1-digetx@gmail.com> References: <20210701232728.23591-1-digetx@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org EMC is always enabled, mark it as enabled. This makes the OPP and GENPD API usage more consistent since otherwise we're changing performance state of a power domain for the device that doesn't support power management. Signed-off-by: Dmitry Osipenko --- drivers/memory/tegra/tegra20-emc.c | 31 ++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c index c3462dbc8c22..22087009fa0c 100644 --- a/drivers/memory/tegra/tegra20-emc.c +++ b/drivers/memory/tegra/tegra20-emc.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -1028,6 +1029,32 @@ static int tegra_emc_devfreq_init(struct tegra_emc *emc) return 0; } +static void devm_tegra_emc_disable_runtime_pm(void *dev) +{ + pm_runtime_put(dev); + pm_runtime_disable(dev); +} + +static int tegra_emc_init_pm(struct tegra_emc *emc) +{ + int err; + + pm_runtime_enable(emc->dev); + err = pm_runtime_resume_and_get(emc->dev); + if (err) { + pm_runtime_disable(emc->dev); + return err; + } + + err = devm_add_action_or_reset(emc->dev, + devm_tegra_emc_disable_runtime_pm, + emc->dev); + if (err) + return err; + + return 0; +} + static int tegra_emc_probe(struct platform_device *pdev) { struct tegra_core_opp_params opp_params = {}; @@ -1076,6 +1103,10 @@ static int tegra_emc_probe(struct platform_device *pdev) if (err) return err; + err = tegra_emc_init_pm(emc); + if (err) + return err; + opp_params.init_state = true; err = devm_tegra_core_dev_init_opp_table(&pdev->dev, &opp_params); -- 2.30.2