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