Re: [PATCH v4 04/23] phy: qcom-qmp-ufs: Add support for configuring PHY in HS Series B mode

Dmitry Baryshkov
2022-12-05T21:53:16Z

On 1 December 2022 20:43:09 GMT+03:00, Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> wrote:
>Add separate tables_hs_b instance to allow the PHY driver to configure the
>PHY in HS Series B mode. The individual SoC configs need to supply the
>serdes register setting in tables_hs_b and the UFS driver can request the
>Series B mode by calling phy_set_mode() with mode set to PHY_MODE_UFS_HS_B.
>
>Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
>Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
>---
> drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
>diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>index 516027e356f0..2d5dd336aeb2 100644
>--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
>@@ -547,6 +547,8 @@ struct qmp_phy_cfg {
>
> /* Main init sequence for PHY blocks - serdes, tx, rx, pcs */
> const struct qmp_phy_cfg_tbls tbls;
>+ /* Additional sequence for HS Series B */
>+ const struct qmp_phy_cfg_tbls tbls_hs_b;
>
> /* clock ids to be requested */
> const char * const *clk_list;
>@@ -580,6 +582,7 @@ struct qmp_ufs {
> struct reset_control *ufs_reset;
>
> struct phy *phy;
>+ u32 mode;
> };
>
> static inline void qphy_setbits(void __iomem *base, u32 offset, u32 val)
>@@ -841,6 +844,8 @@ static void qmp_ufs_pcs_init(struct qmp_ufs *qmp, const struct qmp_phy_cfg_tbls
> static void qmp_ufs_init_registers(struct qmp_ufs *qmp, const struct qmp_phy_cfg *cfg)
> {
> qmp_ufs_serdes_init(qmp, &cfg->tbls);
>+ if (qmp->mode == PHY_MODE_UFS_HS_B)
>+ qmp_ufs_serdes_init(qmp, &cfg->tbls_hs_b);

I still think that qmp_ufs_init_registers() is a way to go here , see the pcie driver.

> qmp_ufs_lanes_init(qmp, &cfg->tbls);
> qmp_ufs_pcs_init(qmp, &cfg->tbls);
> }
>@@ -1011,9 +1016,19 @@ static int qmp_ufs_disable(struct phy *phy)
> return qmp_ufs_exit(phy);
> }
>
>+static int qmp_ufs_set_mode(struct phy *phy, enum phy_mode mode, int submode)
>+{
>+ struct qmp_ufs *qmp = phy_get_drvdata(phy);
>+
>+ qmp->mode = mode;
>+
>+ return 0;
>+}
>+
> static const struct phy_ops qcom_qmp_ufs_phy_ops = {
> .power_on = qmp_ufs_enable,
> .power_off = qmp_ufs_disable,
>+ .set_mode = qmp_ufs_set_mode,
> .owner = THIS_MODULE,
> };
>

--
With best wishes
Dmitry