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FROMLIST: PCI: qcom: Add .get_ltssm() helper #304

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FROMLIST: PCI: qcom: Add .get_ltssm() helper #304

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11 changes: 11 additions & 0 deletions drivers/pci/controller/dwc/pcie-qcom.c
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Original file line number Diff line number Diff line change
Expand Up @@ -135,6 +135,7 @@

/* PARF_LTSSM register fields */
#define LTSSM_EN BIT(8)
#define PARF_LTSSM_STATE_MASK GENMASK(5, 0)

/* PARF_INT_ALL_{STATUS/CLEAR/MASK} register fields */
#define PARF_INT_ALL_LINK_UP BIT(13)
Expand Down Expand Up @@ -1260,6 +1261,15 @@ static bool qcom_pcie_link_up(struct dw_pcie *pci)
return val & PCI_EXP_LNKSTA_DLLLA;
}

static enum dw_pcie_ltssm qcom_pcie_get_ltssm(struct dw_pcie *pci)
{
struct qcom_pcie *pcie = to_qcom_pcie(pci);
u32 val;

val = readl(pcie->parf + PARF_LTSSM);
return (enum dw_pcie_ltssm)FIELD_GET(PARF_LTSSM_STATE_MASK, val);
}

static void qcom_pcie_phy_power_off(struct qcom_pcie *pcie)
{
struct qcom_pcie_port *port;
Expand Down Expand Up @@ -1515,6 +1525,7 @@ static const struct qcom_pcie_cfg cfg_fw_managed = {
static const struct dw_pcie_ops dw_pcie_ops = {
.link_up = qcom_pcie_link_up,
.start_link = qcom_pcie_start_link,
.get_ltssm = qcom_pcie_get_ltssm,
};

static int qcom_pcie_icc_init(struct qcom_pcie *pcie)
Expand Down