Re: [PATCH v4 8/9] clk: qcom: rpmh: Add support for SM8550 rpmh clocks

From: Dmitry Baryshkov
Date: Wed Nov 30 2022 - 06:45:39 EST

On Wed, 30 Nov 2022 at 13:30, Abel Vesa <abel.vesa@xxxxxxxxxx> wrote:
>
> Adds the RPMH clocks present in SM8550 SoC.
>
> Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxx>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
> ---
> drivers/clk/qcom/clk-rpmh.c | 110 +++++++++++++++++++++++++++++-------
> 1 file changed, 90 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/clk/qcom/clk-rpmh.c b/drivers/clk/qcom/clk-rpmh.c
> index 0471bab82464..3204df3fda86 100644
> --- a/drivers/clk/qcom/clk-rpmh.c
> +++ b/drivers/clk/qcom/clk-rpmh.c
> @@ -132,6 +132,36 @@ static DEFINE_MUTEX(rpmh_clk_lock);
> }, \
> }
>
> +#define DEFINE_CLK_RPMH_FIXED(_platform, _name, _name_active, \
> + _parent_name, _name_active_parent, \
> + _div) \
> + static struct clk_fixed_factor _platform##_##_name = { \
> + .mult = 1, \
> + .div = _div, \
> + .hw.init = &(struct clk_init_data){ \
> + .ops = &clk_fixed_factor_ops, \
> + .name = #_name, \
> + .parent_data = &(const struct clk_parent_data){ \
> + .fw_name = #_parent_name, \
> + .name = #_parent_name, \
> + }, \
> + .num_parents = 1, \
> + }, \
> + }; \
> + static struct clk_fixed_factor _platform##_##_name_active = { \
> + .mult = 1, \
> + .div = _div, \
> + .hw.init = &(struct clk_init_data){ \
> + .ops = &clk_fixed_factor_ops, \
> + .name = #_name_active, \
> + .parent_data = &(const struct clk_parent_data){ \
> + .fw_name = #_name_active_parent,\
> + .name = #_name_active_parent, \
> + }, \
> + .num_parents = 1, \
> + }, \
> + }
> +

Please use CLK_FIXED_FACTOR_FW_NAME() instead.

> static inline struct clk_rpmh *to_clk_rpmh(struct clk_hw *_hw)
> {
> return container_of(_hw, struct clk_rpmh, hw);
> @@ -579,6 +609,43 @@ static const struct clk_rpmh_desc clk_rpmh_sm8450 = {
> .num_clks = ARRAY_SIZE(sm8450_rpmh_clocks),
> };
>
> +DEFINE_CLK_RPMH_ARC(sm8550, xo_pad, xo_pad_ao, "xo.lvl", 0x03, 2);
> +DEFINE_CLK_RPMH_FIXED(sm8550, bi_tcxo, bi_tcxo_ao, xo_pad, xo_pad_ao, 2);
> +DEFINE_CLK_RPMH_VRM(sm8550, rf_clk1, rf_clk1_ao, "clka1", 1);
> +DEFINE_CLK_RPMH_VRM(sm8550, rf_clk2, rf_clk2_ao, "clka2", 1);
> +DEFINE_CLK_RPMH_VRM(sm8550, rf_clk3, rf_clk3_ao, "clka3", 1);
> +DEFINE_CLK_RPMH_VRM(sm8550, rf_clk4, rf_clk4_ao, "clka4", 1);
> +DEFINE_CLK_RPMH_VRM(sm8550, ln_bb_clk1, ln_bb_clk1_ao, "clka6", 2);
> +DEFINE_CLK_RPMH_VRM(sm8550, ln_bb_clk2, ln_bb_clk2_ao, "clka7", 2);
> +DEFINE_CLK_RPMH_VRM(sm8550, ln_bb_clk3, ln_bb_clk3_ao, "clka8", 2);
> +
> +static struct clk_hw *sm8550_rpmh_clocks[] = {
> + [RPMH_CXO_PAD_CLK] = &sm8550_xo_pad.hw,
> + [RPMH_CXO_PAD_CLK_A] = &sm8550_xo_pad_ao.hw,
> + [RPMH_CXO_CLK] = &sm8550_bi_tcxo.hw,
> + [RPMH_CXO_CLK_A] = &sm8550_bi_tcxo_ao.hw,
> + [RPMH_LN_BB_CLK1] = &sm8550_ln_bb_clk1.hw,
> + [RPMH_LN_BB_CLK1_A] = &sm8550_ln_bb_clk1_ao.hw,
> + [RPMH_LN_BB_CLK2] = &sm8550_ln_bb_clk2.hw,
> + [RPMH_LN_BB_CLK2_A] = &sm8550_ln_bb_clk2_ao.hw,
> + [RPMH_LN_BB_CLK3] = &sm8550_ln_bb_clk3.hw,
> + [RPMH_LN_BB_CLK3_A] = &sm8550_ln_bb_clk3_ao.hw,
> + [RPMH_RF_CLK1] = &sm8550_rf_clk1.hw,
> + [RPMH_RF_CLK1_A] = &sm8550_rf_clk1_ao.hw,
> + [RPMH_RF_CLK2] = &sm8550_rf_clk2.hw,
> + [RPMH_RF_CLK2_A] = &sm8550_rf_clk2_ao.hw,
> + [RPMH_RF_CLK3] = &sm8550_rf_clk3.hw,
> + [RPMH_RF_CLK3_A] = &sm8550_rf_clk3_ao.hw,
> + [RPMH_RF_CLK4] = &sm8550_rf_clk4.hw,
> + [RPMH_RF_CLK4_A] = &sm8550_rf_clk4_ao.hw,
> + [RPMH_IPA_CLK] = &sdm845_ipa.hw,
> +};
> +
> +static const struct clk_rpmh_desc clk_rpmh_sm8550 = {
> + .clks = sm8550_rpmh_clocks,
> + .num_clks = ARRAY_SIZE(sm8550_rpmh_clocks),
> +};
> +
> static struct clk_hw *sc7280_rpmh_clocks[] = {
> [RPMH_CXO_CLK] = &sc7280_bi_tcxo.hw,
> [RPMH_CXO_CLK_A] = &sc7280_bi_tcxo_ao.hw,
> @@ -682,29 +749,31 @@ static int clk_rpmh_probe(struct platform_device *pdev)
>
> name = hw_clks[i]->init->name;
>
> - rpmh_clk = to_clk_rpmh(hw_clks[i]);
> - res_addr = cmd_db_read_addr(rpmh_clk->res_name);
> - if (!res_addr) {
> - dev_err(&pdev->dev, "missing RPMh resource address for %s\n",
> - rpmh_clk->res_name);
> - return -ENODEV;
> - }
> + if (hw_clks[i]->init->ops != &clk_fixed_factor_ops) {

This looks ugly a bit. I'd rather add something like non_cmd_clks to
the clk_rpmh_desc data and register them separately. Or even worse,
you can keep the rpmh as is, with only cmd-db based clocks and add a
fixed factor clock to the sm8550 dtsi directly. I have a slight
preference for the former method, but the latter would also work.

> + rpmh_clk = to_clk_rpmh(hw_clks[i]);
> + res_addr = cmd_db_read_addr(rpmh_clk->res_name);
> + if (!res_addr) {
> + dev_err(&pdev->dev, "missing RPMh resource address for %s\n",
> + rpmh_clk->res_name);
> + return -ENODEV;
> + }
>
> - data = cmd_db_read_aux_data(rpmh_clk->res_name, &aux_data_len);
> - if (IS_ERR(data)) {
> - ret = PTR_ERR(data);
> - dev_err(&pdev->dev,
> - "error reading RPMh aux data for %s (%d)\n",
> - rpmh_clk->res_name, ret);
> - return ret;
> - }
> + data = cmd_db_read_aux_data(rpmh_clk->res_name, &aux_data_len);
> + if (IS_ERR(data)) {
> + ret = PTR_ERR(data);
> + dev_err(&pdev->dev,
> + "error reading RPMh aux data for %s (%d)\n",
> + rpmh_clk->res_name, ret);
> + return ret;
> + }
>
> - /* Convert unit from Khz to Hz */
> - if (aux_data_len == sizeof(*data))
> - rpmh_clk->unit = le32_to_cpu(data->unit) * 1000ULL;
> + /* Convert unit from Khz to Hz */
> + if (aux_data_len == sizeof(*data))
> + rpmh_clk->unit = le32_to_cpu(data->unit) * 1000ULL;
>
> - rpmh_clk->res_addr += res_addr;
> - rpmh_clk->dev = &pdev->dev;
> + rpmh_clk->res_addr += res_addr;
> + rpmh_clk->dev = &pdev->dev;
> + }
>
> ret = devm_clk_hw_register(&pdev->dev, hw_clks[i]);
> if (ret) {
> @@ -739,6 +808,7 @@ static const struct of_device_id clk_rpmh_match_table[] = {
> { .compatible = "qcom,sm8250-rpmh-clk", .data = &clk_rpmh_sm8250},
> { .compatible = "qcom,sm8350-rpmh-clk", .data = &clk_rpmh_sm8350},
> { .compatible = "qcom,sm8450-rpmh-clk", .data = &clk_rpmh_sm8450},
> + { .compatible = "qcom,sm8550-rpmh-clk", .data = &clk_rpmh_sm8550},
> { .compatible = "qcom,sc7280-rpmh-clk", .data = &clk_rpmh_sc7280},
> { }
> };
> --
> 2.34.1
>


--
With best wishes
Dmitry