lkml.org 
[lkml]   [2020]   [Sep]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 1/3] memory: tegra: Add helper function tegra_get_memory_controller
Date
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
\
 
 \ /
  Last update: 2020-09-30 02:36    [W:0.159 / U:0.344 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site