On 23-04-03 17:52:58, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
>
> Add mcore_booted boot parameter which could simplify AMP clock
> management. To i.MX93, there is CCM(clock control Module) to generate
> clock root clock, anatop(analog PLL module) to generate PLL, and LPCG
> (clock gating) to gate clocks to peripherals. As below:
> anatop->ccm->lpcg->peripheral
>
> Linux handles the clock management and the auxiliary core is under
> control of Linux. Although there is per hardware domain control for LPCG
> and CCM, auxiliary core normally only use LPCG hardware domain control
> to avoid linux gate off the clk to peripherals and leave CCM ana anatop
> to Linux.
>
> Reviewed-by: Ye Li <ye.li@xxxxxxx>
> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
Reviewed-by: Abel Vesa <abel.vesa@xxxxxxxxxx>
> ---
> drivers/clk/imx/clk-composite-93.c | 8 +++++++-
> drivers/clk/imx/clk-imx93.c | 2 ++
> 2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/clk/imx/clk-composite-93.c b/drivers/clk/imx/clk-composite-93.c
> index 74a66b0203e4..81164bdcd6cc 100644
> --- a/drivers/clk/imx/clk-composite-93.c
> +++ b/drivers/clk/imx/clk-composite-93.c
> @@ -222,7 +222,7 @@ struct clk_hw *imx93_clk_composite_flags(const char *name, const char * const *p
> hw = clk_hw_register_composite(NULL, name, parent_names, num_parents,
> mux_hw, &clk_mux_ro_ops, div_hw,
> &clk_divider_ro_ops, NULL, NULL, flags);
> - } else {
> + } else if (!mcore_booted) {
> gate = kzalloc(sizeof(*gate), GFP_KERNEL);
> if (!gate)
> goto fail;
> @@ -238,6 +238,12 @@ struct clk_hw *imx93_clk_composite_flags(const char *name, const char * const *p
> &imx93_clk_composite_divider_ops, gate_hw,
> &imx93_clk_composite_gate_ops,
> flags | CLK_SET_RATE_NO_REPARENT);
> + } else {
> + hw = clk_hw_register_composite(NULL, name, parent_names, num_parents,
> + mux_hw, &imx93_clk_composite_mux_ops, div_hw,
> + &imx93_clk_composite_divider_ops, NULL,
> + &imx93_clk_composite_gate_ops,
> + flags | CLK_SET_RATE_NO_REPARENT);
> }
>
> if (IS_ERR(hw))
> diff --git a/drivers/clk/imx/clk-imx93.c b/drivers/clk/imx/clk-imx93.c
> index 8d0974db6bfd..de1ed1d8ba54 100644
> --- a/drivers/clk/imx/clk-imx93.c
> +++ b/drivers/clk/imx/clk-imx93.c
> @@ -352,6 +352,8 @@ static struct platform_driver imx93_clk_driver = {
> },
> };
> module_platform_driver(imx93_clk_driver);
> +module_param(mcore_booted, bool, 0444);
> +MODULE_PARM_DESC(mcore_booted, "See Cortex-M core is booted or not");
>
> MODULE_DESCRIPTION("NXP i.MX93 clock driver");
> MODULE_LICENSE("GPL v2");
> --
> 2.37.1
>
