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-rw-r--r--drivers/soc/tegra/fuse/fuse-tegra.c30
-rw-r--r--drivers/soc/tegra/fuse/fuse-tegra20.c10
-rw-r--r--drivers/soc/tegra/fuse/fuse-tegra30.c9
3 files changed, 40 insertions, 9 deletions
diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
index 2434c570b53c..747237865aff 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -13,6 +13,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
@@ -210,6 +211,8 @@ static int tegra_fuse_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, fuse);
fuse->dev = &pdev->dev;
+ pm_runtime_enable(&pdev->dev);
+
if (fuse->soc->probe) {
err = fuse->soc->probe(fuse);
if (err < 0)
@@ -248,13 +251,40 @@ static int tegra_fuse_probe(struct platform_device *pdev)
restore:
fuse->clk = NULL;
fuse->base = base;
+ pm_runtime_disable(&pdev->dev);
return err;
}
+static int __maybe_unused tegra_fuse_runtime_resume(struct device *dev)
+{
+ int err;
+
+ err = clk_prepare_enable(fuse->clk);
+ if (err < 0) {
+ dev_err(dev, "failed to enable FUSE clock: %d\n", err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused tegra_fuse_runtime_suspend(struct device *dev)
+{
+ clk_disable_unprepare(fuse->clk);
+
+ return 0;
+}
+
+static const struct dev_pm_ops tegra_fuse_pm = {
+ SET_RUNTIME_PM_OPS(tegra_fuse_runtime_suspend, tegra_fuse_runtime_resume,
+ NULL)
+};
+
static struct platform_driver tegra_fuse_driver = {
.driver = {
.name = "tegra-fuse",
.of_match_table = tegra_fuse_match,
+ .pm = &tegra_fuse_pm,
.suppress_bind_attrs = true,
},
.probe = tegra_fuse_probe,
diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c
index 16aaa28573ac..cd6a273707fe 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra20.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra20.c
@@ -16,6 +16,7 @@
#include <linux/kobject.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/random.h>
#include <soc/tegra/fuse.h>
@@ -46,6 +47,10 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
u32 value = 0;
int err;
+ err = pm_runtime_resume_and_get(fuse->dev);
+ if (err)
+ return err;
+
mutex_lock(&fuse->apbdma.lock);
fuse->apbdma.config.src_addr = fuse->phys + FUSE_BEGIN + offset;
@@ -66,8 +71,6 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
reinit_completion(&fuse->apbdma.wait);
- clk_prepare_enable(fuse->clk);
-
dmaengine_submit(dma_desc);
dma_async_issue_pending(fuse->apbdma.chan);
time_left = wait_for_completion_timeout(&fuse->apbdma.wait,
@@ -78,10 +81,9 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
else
value = *fuse->apbdma.virt;
- clk_disable_unprepare(fuse->clk);
-
out:
mutex_unlock(&fuse->apbdma.lock);
+ pm_runtime_put(fuse->dev);
return value;
}
diff --git a/drivers/soc/tegra/fuse/fuse-tegra30.c b/drivers/soc/tegra/fuse/fuse-tegra30.c
index c1aa7815bd6e..dd03565a39a4 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra30.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra30.c
@@ -12,6 +12,7 @@
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/random.h>
#include <soc/tegra/fuse.h>
@@ -52,15 +53,13 @@ static u32 tegra30_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
u32 value;
int err;
- err = clk_prepare_enable(fuse->clk);
- if (err < 0) {
- dev_err(fuse->dev, "failed to enable FUSE clock: %d\n", err);
+ err = pm_runtime_resume_and_get(fuse->dev);
+ if (err)
return 0;
- }
value = readl_relaxed(fuse->base + FUSE_BEGIN + offset);
- clk_disable_unprepare(fuse->clk);
+ pm_runtime_put(fuse->dev);
return value;
}