diff options
| author | Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com> | 2025-09-03 10:27:51 +0200 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2025-09-04 11:29:31 +0200 |
| commit | f8c5f0dc77d86da36bcbf0684c6747a2937cc3cd (patch) | |
| tree | 23c374ecfb61a2acd0b9e5da9233c366a4b16004 | |
| parent | 341b0f1b6cba5f4f317f4bb51efa8e9f566ac8e3 (diff) | |
clk: renesas: rzg2l: Re-assert reset on deassert timeout
Prevent issues during reset deassertion by re-asserting the reset if a
timeout occurs when trying to deassert. This ensures the reset line is in a
known state and improves reliability for hardware that may not immediately
clear the reset monitor bit.
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://lore.kernel.org/20250903082757.115778-3-tommaso.merciai.xr@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
| -rw-r--r-- | drivers/clk/renesas/rzg2l-cpg.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c index e0e1bebd9895..07909e80bae2 100644 --- a/drivers/clk/renesas/rzg2l-cpg.c +++ b/drivers/clk/renesas/rzg2l-cpg.c @@ -1667,8 +1667,14 @@ static int __rzg2l_cpg_assert(struct reset_controller_dev *rcdev, return 0; } - return readl_poll_timeout_atomic(priv->base + reg, value, - assert == !!(value & mask), 10, 200); + ret = readl_poll_timeout_atomic(priv->base + reg, value, + assert == !!(value & mask), 10, 200); + if (ret && !assert) { + value = mask << 16; + writel(value, priv->base + CLK_RST_R(info->resets[id].off)); + } + + return ret; } static int rzg2l_cpg_assert(struct reset_controller_dev *rcdev, |