github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 10:33:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

media: chips-media: wave5: support reset lines

Browse Source 
Add initial support for optional reset lines. For now, simply deassert
resets while probing the driver and assert them back when removing the
driver.

Signed-off-by: Ivan Bornyakov <brnkv.i1@gmail.com>
Signed-off-by: Sebastian Fricke <sebastian.fricke@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Ivan Bornyakov 2024-04-15 13:07:20 +03:00 committed by Hans Verkuil
parent 143e7ab4d9
commit 2b9188426b
2 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/media/platform/chips-media/wave5/wave5-vpu.c
View File

@ -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"
@ -179,6 +180,16 @@ 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");
}
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 */
@ -191,7 +202,7 @@ static int wave5_vpu_probe(struct platform_device *pdev)
ret = clk_bulk_prepare_enable(dev->num_clks, dev->clks);
if (ret) {
dev_err(&pdev->dev, "Enabling clocks, fail: %d\n", ret);
return ret;
goto err_reset_assert;
}
ret = of_property_read_u32(pdev->dev.of_node, "sram-size",
@ -282,6 +293,8 @@ static int wave5_vpu_probe(struct platform_device *pdev)
wave5_vdi_release(&pdev->dev);
err_clk_dis:
clk_bulk_disable_unprepare(dev->num_clks, dev->clks);
err_reset_assert:
reset_control_assert(dev->resets);
return ret;
}
@ -297,6 +310,7 @@ 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);

1
drivers/media/platform/chips-media/wave5/wave5-vpuapi.h
View File

@ -762,6 +762,7 @@ struct vpu_device {
struct kthread_worker *worker;
int vpu_poll_interval;
int num_clks;
struct reset_control *resets;
};
struct vpu_instance;