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From c318c90b824c59539bf2e33618e381293398616c Mon Sep 17 00:00:00 2001
From: Christian Marangi <ansuelsmth@gmail.com>
Date: Tue, 16 Apr 2024 15:02:49 +0200
Subject: [PATCH 1/6] edma_v1: rework hw_reset logic to permit rmmod and insmod
Rework hw_reset logic for edma v1 to permit rmmod and insmod by using
get_exclusive_released variant (assuming the reset control was released)
and manually acquire and release it.
This permits rmmod and insmod without triggering warning or receiving
-EBUSY errors.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
hal/dp_ops/edma_dp/edma_v1/edma_cfg.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/hal/dp_ops/edma_dp/edma_v1/edma_cfg.c
+++ b/hal/dp_ops/edma_dp/edma_v1/edma_cfg.c
@@ -719,18 +719,22 @@ int edma_hw_reset(struct edma_hw *ehw)
struct reset_control *rst;
struct platform_device *pdev = ehw->pdev;
- rst = devm_reset_control_get(&pdev->dev, EDMA_HW_RESET_ID);
+ rst = devm_reset_control_get_exclusive_released(&pdev->dev, EDMA_HW_RESET_ID);
if (IS_ERR(rst)) {
pr_warn("DTS Node: %s does not exist\n", EDMA_HW_RESET_ID);
return -EINVAL;
}
+ reset_control_acquire(rst);
+
reset_control_assert(rst);
udelay(100);
reset_control_deassert(rst);
udelay(100);
+ reset_control_release(rst);
+
pr_info("EDMA HW Reset completed succesfully\n");
return 0;
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