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[216.228.112.22]) by smtp.gmail.com with ESMTPSA id x185sm6904738pfc.188.2020.09.29.17.35.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Sep 2020 17:35:45 -0700 (PDT) From: Nicolin Chen To: thierry.reding@gmail.com, joro@8bytes.org, krzk@kernel.org, digetx@gmail.com Cc: vdumpa@nvidia.com, jonathanh@nvidia.com, linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/3] memory: tegra: Add helper function tegra_get_memory_controller Date: Tue, 29 Sep 2020 17:30:11 -0700 Message-Id: <20200930003013.31289-2-nicoleotsuka@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200930003013.31289-1-nicoleotsuka@gmail.com> References: <20200930003013.31289-1-nicoleotsuka@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This can be used by both tegra-smmu and tegra20-devfreq drivers. Suggested-by: Dmitry Osipenko Signed-off-by: Nicolin Chen --- Changelog v1->v2 * N/A drivers/memory/tegra/mc.c | 23 +++++++++++++++++++++++ include/soc/tegra/mc.h | 1 + 2 files changed, 24 insertions(+) diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index ec8403557ed4..09352ad66dcc 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -42,6 +42,29 @@ static const struct of_device_id tegra_mc_of_match[] = { }; MODULE_DEVICE_TABLE(of, tegra_mc_of_match); +struct tegra_mc *tegra_get_memory_controller(void) +{ + struct platform_device *pdev; + struct device_node *np; + struct tegra_mc *mc; + + np = of_find_matching_node_and_match(NULL, tegra_mc_of_match, NULL); + if (!np) + return ERR_PTR(-ENOENT); + + pdev = of_find_device_by_node(np); + of_node_put(np); + if (!pdev) + return ERR_PTR(-ENODEV); + + mc = platform_get_drvdata(pdev); + if (!mc) + return ERR_PTR(-EPROBE_DEFER); + + return mc; +} +EXPORT_SYMBOL_GPL(tegra_get_memory_controller); + static int tegra_mc_block_dma_common(struct tegra_mc *mc, const struct tegra_mc_reset *rst) { diff --git a/include/soc/tegra/mc.h b/include/soc/tegra/mc.h index 1238e35653d1..c72718fd589f 100644 --- a/include/soc/tegra/mc.h +++ b/include/soc/tegra/mc.h @@ -183,5 +183,6 @@ struct tegra_mc { int tegra_mc_write_emem_configuration(struct tegra_mc *mc, unsigned long rate); unsigned int tegra_mc_get_emem_device_count(struct tegra_mc *mc); +struct tegra_mc *tegra_get_memory_controller(void); #endif /* __SOC_TEGRA_MC_H__ */ -- 2.17.1