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clk: imx8m: check mcore_booted before register clk

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If mcore_booted is true, ignore the clk root gate registration and
this will simplify AMP clock management and avoid system hang unexpectly
especially Linux shutdown clk used by mcore.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Link: https://lore.kernel.org/r/20220228124112.3974242-2-peng.fan@oss.nxp.com
[abelvesa@kernel.org: Removed if-case for when mcore_booted is true]
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
This commit is contained in:
Peng Fan 2022-02-28 20:41:12 +08:00 committed by Abel Vesa
parent 19565ea12d
commit bb7e897b00
1 changed files with 11 additions and 8 deletions
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19
drivers/clk/imx/clk-composite-8m.c
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@ -178,7 +178,7 @@ struct clk_hw *__imx8m_clk_hw_composite(const char *name,
unsigned long flags)
{
struct clk_hw *hw = ERR_PTR(-ENOMEM), *mux_hw;
struct clk_hw *div_hw, *gate_hw;
struct clk_hw *div_hw, *gate_hw = NULL;
struct clk_divider *div = NULL;
struct clk_gate *gate = NULL;
struct clk_mux *mux = NULL;
@ -223,14 +223,17 @@ struct clk_hw *__imx8m_clk_hw_composite(const char *name,
div->lock = &imx_ccm_lock;
div->flags = CLK_DIVIDER_ROUND_CLOSEST;
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate)
goto fail;
/* skip registering the gate ops if M4 is enabled */
if (!mcore_booted) {
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate)
goto fail;
gate_hw = &gate->hw;
gate->reg = reg;
gate->bit_idx = PCG_CGC_SHIFT;
gate->lock = &imx_ccm_lock;
gate_hw = &gate->hw;
gate->reg = reg;
gate->bit_idx = PCG_CGC_SHIFT;
gate->lock = &imx_ccm_lock;
}
hw = clk_hw_register_composite(NULL, name, parent_names, num_parents,
mux_hw, mux_ops, div_hw,