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From: Nicolin Chen <nicoleotsuka@gmail.com>
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	[thread overview]
Message-ID: <20200930003013.31289-2-nicoleotsuka@gmail.com> (raw)
In-Reply-To: <20200930003013.31289-1-nicoleotsuka@gmail.com>

This can be used by both tegra-smmu and tegra20-devfreq drivers.

Suggested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---

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


WARNING: multiple messages have this Message-ID (diff)
From: Nicolin Chen <nicoleotsuka@gmail.com>
To: thierry.reding@gmail.com, joro@8bytes.org, krzk@kernel.org,
	digetx@gmail.com
Cc: linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org,
	iommu@lists.linux-foundation.org, jonathanh@nvidia.com
Subject: [PATCH v2 1/3] memory: tegra: Add helper function tegra_get_memory_controller
Date: Tue, 29 Sep 2020 17:30:11 -0700	[thread overview]
Message-ID: <20200930003013.31289-2-nicoleotsuka@gmail.com> (raw)
In-Reply-To: <20200930003013.31289-1-nicoleotsuka@gmail.com>

This can be used by both tegra-smmu and tegra20-devfreq drivers.

Suggested-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
---

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

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  reply	other threads:[~2020-09-30  0:35 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-30  0:30 [PATCH v2 0/3] iommu/tegra-smmu: Add PCI support Nicolin Chen
2020-09-30  0:30 ` Nicolin Chen
2020-09-30  0:30 ` Nicolin Chen [this message]
2020-09-30  0:30   ` [PATCH v2 1/3] memory: tegra: Add helper function tegra_get_memory_controller Nicolin Chen
2020-09-30  5:12   ` Dmitry Osipenko
2020-09-30  5:12     ` Dmitry Osipenko
2020-09-30  5:44     ` Nicolin Chen
2020-09-30  5:44       ` Nicolin Chen
2020-09-30  6:32       ` Dmitry Osipenko
2020-09-30  6:32         ` Dmitry Osipenko
2020-09-30  6:38         ` Nicolin Chen
2020-09-30  6:38           ` Nicolin Chen
2020-09-30  7:31           ` Dmitry Osipenko
2020-09-30  7:31             ` Dmitry Osipenko
2020-09-30  7:21   ` Krzysztof Kozlowski
2020-09-30  7:21     ` Krzysztof Kozlowski
2020-09-30  7:25     ` Nicolin Chen
2020-09-30  7:25       ` Nicolin Chen
2020-09-30  7:50       ` Krzysztof Kozlowski
2020-09-30  7:50         ` Krzysztof Kozlowski
2020-09-30  0:30 ` [PATCH v2 2/3] iommu/tegra-smmu: Rework .probe_device and .attach_dev Nicolin Chen
2020-09-30  0:30   ` Nicolin Chen
2020-09-30  5:10   ` Dmitry Osipenko
2020-09-30  5:10     ` Dmitry Osipenko
2020-09-30  5:20     ` Dmitry Osipenko
2020-09-30  5:20       ` Dmitry Osipenko
2020-09-30  5:50       ` Nicolin Chen
2020-09-30  5:50         ` Nicolin Chen
2020-09-30  6:34       ` Nicolin Chen
2020-09-30  6:34         ` Nicolin Chen
2020-09-30  5:11   ` Dmitry Osipenko
2020-09-30  5:11     ` Dmitry Osipenko
2020-09-30  5:49     ` Nicolin Chen
2020-09-30  5:49       ` Nicolin Chen
2020-09-30  6:10       ` Dmitry Osipenko
2020-09-30  6:10         ` Dmitry Osipenko
2020-09-30  6:13         ` Nicolin Chen
2020-09-30  6:13           ` Nicolin Chen
2020-09-30  6:33           ` Dmitry Osipenko
2020-09-30  6:33             ` Dmitry Osipenko
2020-09-30  5:24   ` Dmitry Osipenko
2020-09-30  5:24     ` Dmitry Osipenko
2020-09-30  5:39     ` Nicolin Chen
2020-09-30  5:39       ` Nicolin Chen
2020-09-30  5:48       ` Dmitry Osipenko
2020-09-30  5:48         ` Dmitry Osipenko
2020-09-30  5:39   ` Dmitry Osipenko
2020-09-30  5:39     ` Dmitry Osipenko
2020-09-30  5:41     ` Nicolin Chen
2020-09-30  5:41       ` Nicolin Chen
2020-09-30  5:59       ` Dmitry Osipenko
2020-09-30  5:59         ` Dmitry Osipenko
2020-09-30  6:19         ` Nicolin Chen
2020-09-30  6:19           ` Nicolin Chen
2020-09-30  0:30 ` [PATCH v2 3/3] iommu/tegra-smmu: Add PCI support Nicolin Chen
2020-09-30  0:30   ` Nicolin Chen
2020-09-30  5:10   ` Dmitry Osipenko
2020-09-30  5:10     ` Dmitry Osipenko
2020-09-30  5:28     ` Nicolin Chen
2020-09-30  5:28       ` Nicolin Chen
2020-09-30  5:10   ` Dmitry Osipenko
2020-09-30  5:10     ` Dmitry Osipenko
2020-09-30  5:29     ` Nicolin Chen
2020-09-30  5:29       ` Nicolin Chen
2020-09-30  5:58       ` Dmitry Osipenko
2020-09-30  5:58         ` Dmitry Osipenko
2020-09-30  7:16         ` Nicolin Chen
2020-09-30  7:16           ` Nicolin Chen
2020-09-30  5:10   ` Dmitry Osipenko
2020-09-30  5:10     ` Dmitry Osipenko
2020-09-30  5:34     ` Nicolin Chen
2020-09-30  5:34       ` Nicolin Chen
2020-09-30  6:01       ` Dmitry Osipenko
2020-09-30  6:01         ` Dmitry Osipenko
2020-09-30  7:12         ` Nicolin Chen
2020-09-30  7:12           ` Nicolin Chen

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