Re: [PATCH v2 05/10] PCI: qcom: Add ddrss_sf_tbu flag

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

On Wed, Dec 08, 2021 at 08:14:37PM +0300, Dmitry Baryshkov wrote:
> Qualcomm PCIe driver uses compatible string to check if the ddrss_sf_tbu
> clock should be used. Since sc7280 support has added flags, switch to
> the new mechanism to check if this clock should be used.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> ---
>  drivers/pci/controller/dwc/pcie-qcom.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
> index 51a0475173fb..803d3ac18c56 100644
> --- a/drivers/pci/controller/dwc/pcie-qcom.c
> +++ b/drivers/pci/controller/dwc/pcie-qcom.c
> @@ -194,7 +194,9 @@ struct qcom_pcie_ops {
>  
>  struct qcom_pcie_cfg {
>  	const struct qcom_pcie_ops *ops;
> +	/* flags for ops 2.7.0 and 1.9.0 */

No need of this comment.

>  	unsigned int pipe_clk_need_muxing:1;

This should be added in the previous patch.

> +	unsigned int has_ddrss_sf_tbu_clk:1;

Wondering if we could make both the flags "bool" as the values passed to it
are of boolean type. I don't think we could save a significant amount of
memory using bitfields.

Thanks,
Mani
>  };
>  
>  struct qcom_pcie {
> @@ -1164,7 +1166,7 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
>  	res->clks[3].id = "bus_slave";
>  	res->clks[4].id = "slave_q2a";
>  	res->clks[5].id = "tbu";
> -	if (of_device_is_compatible(dev->of_node, "qcom,pcie-sm8250")) {
> +	if (pcie->cfg->has_ddrss_sf_tbu_clk) {
>  		res->clks[6].id = "ddrss_sf_tbu";
>  		res->num_clks = 7;
>  	} else {
> @@ -1512,6 +1514,7 @@ static const struct qcom_pcie_cfg sdm845_cfg = {
>  
>  static const struct qcom_pcie_cfg sm8250_cfg = {
>  	.ops = &ops_1_9_0,
> +	.has_ddrss_sf_tbu_clk = true,
>  };
>  
>  static const struct qcom_pcie_cfg sc7280_cfg = {
> -- 
> 2.33.0
>