[PATCH 5.4 035/108] Revert "clk: core: Honor CLK_OPS_PARENT_ENABLE for clk gate ops"

Greg Kroah-Hartman
2022-09-13T17:32:27Z

From: Stephen Boyd <sboyd@kernel.org>

[ Upstream commit abb5f3f4b1f5f0ad50eb067a00051d3587dec9fb ]

This reverts commit 35b0fac808b95eea1212f8860baf6ad25b88b087. Alexander
reports that it causes boot failures on i.MX8M Plus based boards
(specifically imx8mp-tqma8mpql-mba8mpxl.dts).

Reported-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Cc: Chen-Yu Tsai <wenst@chromium.org>
Fixes: 35b0fac808b9 ("clk: core: Honor CLK_OPS_PARENT_ENABLE for clk gate ops")
Link: https://lore.kernel.org/r/12115951.O9o76ZdvQC@steina-w
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20220831175326.2523912-1-sboyd@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/clk/clk.c | 28 ----------------------------
1 file changed, 28 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index c5f7a9f9c6c0e..13332f89e034b 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -203,9 +203,6 @@ static bool clk_core_rate_is_protected(struct clk_core *core)
return core->protect_count;
}

-static int clk_core_prepare_enable(struct clk_core *core);
-static void clk_core_disable_unprepare(struct clk_core *core);
-
static bool clk_core_is_prepared(struct clk_core *core)
{
bool ret = false;
@@ -218,11 +215,7 @@ static bool clk_core_is_prepared(struct clk_core *core)
return core->prepare_count;

if (!clk_pm_runtime_get(core)) {
- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_prepare_enable(core->parent);
ret = core->ops->is_prepared(core->hw);
- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_disable_unprepare(core->parent);
clk_pm_runtime_put(core);
}

@@ -258,13 +251,7 @@ static bool clk_core_is_enabled(struct clk_core *core)
}
}

- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_prepare_enable(core->parent);
-
ret = core->ops->is_enabled(core->hw);
-
- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_disable_unprepare(core->parent);
done:
if (core->rpm_enabled)
pm_runtime_put(core->dev);
@@ -837,9 +824,6 @@ int clk_rate_exclusive_get(struct clk *clk)
}
EXPORT_SYMBOL_GPL(clk_rate_exclusive_get);

-static int clk_core_enable_lock(struct clk_core *core);
-static void clk_core_disable_lock(struct clk_core *core);
-
static void clk_core_unprepare(struct clk_core *core)
{
lockdep_assert_held(&prepare_lock);
@@ -863,9 +847,6 @@ static void clk_core_unprepare(struct clk_core *core)

WARN(core->enable_count > 0, "Unpreparing enabled %s\n", core->name);

- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_enable_lock(core->parent);
-
trace_clk_unprepare(core);

if (core->ops->unprepare)
@@ -874,9 +855,6 @@ static void clk_core_unprepare(struct clk_core *core)
clk_pm_runtime_put(core);

trace_clk_unprepare_complete(core);
-
- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_disable_lock(core->parent);
clk_core_unprepare(core->parent);
}

@@ -925,9 +903,6 @@ static int clk_core_prepare(struct clk_core *core)
if (ret)
goto runtime_put;

- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_enable_lock(core->parent);
-
trace_clk_prepare(core);

if (core->ops->prepare)
@@ -935,9 +910,6 @@ static int clk_core_prepare(struct clk_core *core)

trace_clk_prepare_complete(core);

- if (core->flags & CLK_OPS_PARENT_ENABLE)
- clk_core_disable_lock(core->parent);
-
if (ret)
goto unprepare;
}
--
2.35.1