Add initial support for optional reset lines. For now, simply deassert
resets on driver probe and assert them back on driver remove.
Signed-off-by: Ivan Bornyakov <brnkv.i1@xxxxxxxxx>
---
.../media/platform/chips-media/wave5/wave5-vpu.c | 13 +++++++++++++
.../media/platform/chips-media/wave5/wave5-vpuapi.h | 1 +
2 files changed, 14 insertions(+)
diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu.c b/drivers/media/platform/chips-media/wave5/wave5-vpu.c
index 1b3df5b04249..f3ecadefd37a 100644
--- a/drivers/media/platform/chips-media/wave5/wave5-vpu.c
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpu.c
@@ -10,6 +10,7 @@
#include <linux/clk.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
+#include <linux/reset.h>
#include "wave5-vpu.h"
#include "wave5-regdefine.h"
#include "wave5-vpuconfig.h"
@@ -151,6 +152,17 @@ static int wave5_vpu_probe(struct platform_device *pdev)
dev_set_drvdata(&pdev->dev, dev);
dev->dev = &pdev->dev;
+ dev->resets = devm_reset_control_array_get_optional_exclusive(&pdev->dev);
+ if (IS_ERR(dev->resets)) {
+ return dev_err_probe(&pdev->dev, PTR_ERR(dev->resets),
+ "Failed to get reset control\n");
+ } else {
+ ret = reset_control_deassert(dev->resets);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to deassert resets\n");
+ }
+
ret = devm_clk_bulk_get_all(&pdev->dev, &dev->clks);
/* continue without clock, assume externally managed */
@@ -256,6 +268,7 @@ static void wave5_vpu_remove(struct platform_device *pdev)
mutex_destroy(&dev->dev_lock);
mutex_destroy(&dev->hw_lock);
+ reset_control_assert(dev->resets);
clk_bulk_disable_unprepare(dev->num_clks, dev->clks);
wave5_vpu_enc_unregister_device(dev);
wave5_vpu_dec_unregister_device(dev);
diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h
index 352f6e904e50..fa62a85080b5 100644
--- a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h
@@ -757,6 +757,7 @@ struct vpu_device {
struct ida inst_ida;
struct clk_bulk_data *clks;
int num_clks;
+ struct reset_control *resets;
};
struct vpu_instance;
--
2.44.0
