Re: [PATCH v2 3/8] clk: qcom: common: Manage rpm, configure PLLs & AON clks in really probe

[Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>]

On 6.03.2025 9:55 AM, Jagadeesh Kona wrote:
> Add support for runtime power management, PLL configuration and enabling
> critical clocks in qcom_cc_really_probe() to commonize the clock
> controller probe.
> 
> The runtime power management is not required for all clock controllers,
> hence handle the rpm based on use_rpm flag in clock controller descriptor.
> Also the power domains need to be kept enabled during pll configuration,
> hence attach all required power domains prior to calling get_sync() on the
> device.
> 
> Signed-off-by: Jagadeesh Kona <quic_jkona@quicinc.com>
> ---

[...]

> + * struct qcom_clk_cfg - To maintain list of clocks that needs to be
> + *                       kept ON or misc clock register settings

I have some reservations about this name, particularly since 'clk_cfg'
has already been used in the msmbus/interconnect space..

Perhaps qcom_clk_reg_settings?

> + * @offset: address offset for clock register
> + * @mask: bit mask to indicate the bits to update
> + */
> +struct qcom_clk_cfg {
> +	unsigned int offset;
> +	unsigned int mask;

"u32"

also, to expand it, we probably want "field" and "val" to replace the
calls to regmap_update_bits in some drivers

I think we may keep this /\ struct for things like:

/* Enable clock gating for MDP clocks */
regmap_update_bits(regmap, DISP_CC_MISC_CMD, 0x10, 0x10);

while keeping a separate u32 array of branch clocks to call
qcom_branch_set_clk_en() on - we would then use 3x less memory


> +};

> +
>  struct qcom_cc_desc {
>  	const struct regmap_config *config;
>  	struct clk_regmap **clks;
> @@ -39,6 +50,11 @@ struct qcom_cc_desc {
>  	const struct qcom_icc_hws_data *icc_hws;
>  	size_t num_icc_hws;
>  	unsigned int icc_first_node_id;
> +	struct qcom_clk_cfg *clks_cfg;
> +	size_t num_clks_cfg;
> +	struct clk_alpha_pll **plls;

Some ancient or "non-standard" SoCs have non-alpha PLLs, please rename
this to something like alpha_plls


Konrad