--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/* Copyright (c) 2021-2022 NXP. */
+
+#include <linux/module.h>
+#include <linux/phy.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/workqueue.h>
+#include <linux/workqueue.h>
+
+#define LYNX_28G_NUM_LANE 8
+#define LYNX_28G_NUM_PLL 2
+
+/* General registers per SerDes block */
+#define LYNX_28G_PCC8 0x10a0
+#define LYNX_28G_PCC8_SGMII 0x1
+#define LYNX_28G_PCC8_SGMII_DIS 0x0
+
+#define LYNX_28G_PCCC 0x10b0
+#define LYNX_28G_PCCC_10GBASER 0x9
+#define LYNX_28G_PCCC_USXGMII 0x1
+#define LYNX_28G_PCCC_SXGMII_DIS 0x0
+
+#define LYNX_28G_LNa_PCC_OFFSET(lane) (4 * (LYNX_28G_NUM_LANE - (lane->id) - 1))
+
+/* Per PLL registers */
+#define LYNX_28G_PLLnRSTCTL(pll) (0x400 + (pll) * 0x100 + 0x0)
+#define LYNX_28G_PLLnRSTCTL_DIS(rstctl) (((rstctl) & BIT(24)) >> 24)
+#define LYNX_28G_PLLnRSTCTL_LOCK(rstctl) (((rstctl) & BIT(23)) >> 23)
+
+#define LYNX_28G_PLLnCR0(pll) (0x400 + (pll) * 0x100 + 0x4)
+#define LYNX_28G_PLLnCR0_REFCLK_SEL(cr0) (((cr0) & GENMASK(20, 16)))
+#define LYNX_28G_PLLnCR0_REFCLK_SEL_100MHZ 0x0
+#define LYNX_28G_PLLnCR0_REFCLK_SEL_125MHZ 0x10000
+#define LYNX_28G_PLLnCR0_REFCLK_SEL_156MHZ 0x20000
+#define LYNX_28G_PLLnCR0_REFCLK_SEL_150MHZ 0x30000
+#define LYNX_28G_PLLnCR0_REFCLK_SEL_161MHZ 0x40000
+
+#define LYNX_28G_PLLnCR1(pll) (0x400 + (pll) * 0x100 + 0x8)
+#define LYNX_28G_PLLnCR1_FRATE_SEL(cr1) (((cr1) & GENMASK(28, 24)))
+#define LYNX_28G_PLLnCR1_FRATE_5G_10GVCO 0x0
+#define LYNX_28G_PLLnCR1_FRATE_5G_25GVCO 0x10000000
+#define LYNX_28G_PLLnCR1_FRATE_10G_20GVCO 0x6000000
+
+/* Per SerDes lane registers */
+/* Lane a General Control Register */
+#define LYNX_28G_LNaGCR0(lane) (0x800 + (lane) * 0x100 + 0x0)
+#define LYNX_28G_LNaGCR0_PROTO_SEL_MSK GENMASK(7, 3)
+#define LYNX_28G_LNaGCR0_PROTO_SEL_SGMII 0x8
+#define LYNX_28G_LNaGCR0_PROTO_SEL_XFI 0x50
+#define LYNX_28G_LNaGCR0_IF_WIDTH_MSK GENMASK(2, 0)
+#define LYNX_28G_LNaGCR0_IF_WIDTH_10_BIT 0x0
+#define LYNX_28G_LNaGCR0_IF_WIDTH_20_BIT 0x2
+
+/* Lane a Tx Reset Control Register */
+#define LYNX_28G_LNaTRSTCTL(lane) (0x800 + (lane) * 0x100 + 0x20)
+#define LYNX_28G_LNaTRSTCTL_HLT_REQ BIT(27)
+#define LYNX_28G_LNaTRSTCTL_RST_DONE BIT(30)
+#define LYNX_28G_LNaTRSTCTL_RST_REQ BIT(31)
+
+/* Lane a Tx General Control Register */
+#define LYNX_28G_LNaTGCR0(lane) (0x800 + (lane) * 0x100 + 0x24)
+#define LYNX_28G_LNaTGCR0_USE_PLLF 0x0
+#define LYNX_28G_LNaTGCR0_USE_PLLS BIT(28)
+#define LYNX_28G_LNaTGCR0_USE_PLL_MSK BIT(28)
+#define LYNX_28G_LNaTGCR0_N_RATE_FULL 0x0
+#define LYNX_28G_LNaTGCR0_N_RATE_HALF 0x1000000
+#define LYNX_28G_LNaTGCR0_N_RATE_QUARTER 0x2000000
+#define LYNX_28G_LNaTGCR0_N_RATE_MSK GENMASK(26, 24)
+
+#define LYNX_28G_LNaTECR0(lane) (0x800 + (lane) * 0x100 + 0x30)
+
+/* Lane a Rx Reset Control Register */
+#define LYNX_28G_LNaRRSTCTL(lane) (0x800 + (lane) * 0x100 + 0x40)
+#define LYNX_28G_LNaRRSTCTL_HLT_REQ BIT(27)
+#define LYNX_28G_LNaRRSTCTL_RST_DONE BIT(30)
+#define LYNX_28G_LNaRRSTCTL_RST_REQ BIT(31)
+#define LYNX_28G_LNaRRSTCTL_CDR_LOCK BIT(12)
+
+/* Lane a Rx General Control Register */
+#define LYNX_28G_LNaRGCR0(lane) (0x800 + (lane) * 0x100 + 0x44)
+#define LYNX_28G_LNaRGCR0_USE_PLLF 0x0
+#define LYNX_28G_LNaRGCR0_USE_PLLS BIT(28)
+#define LYNX_28G_LNaRGCR0_USE_PLL_MSK BIT(28)
+#define LYNX_28G_LNaRGCR0_N_RATE_MSK GENMASK(26, 24)
+#define LYNX_28G_LNaRGCR0_N_RATE_FULL 0x0
+#define LYNX_28G_LNaRGCR0_N_RATE_HALF 0x1000000
+#define LYNX_28G_LNaRGCR0_N_RATE_QUARTER 0x2000000
+#define LYNX_28G_LNaRGCR0_N_RATE_MSK GENMASK(26, 24)
+
+#define LYNX_28G_LNaRGCR1(lane) (0x800 + (lane) * 0x100 + 0x48)
+
+#define LYNX_28G_LNaRECR0(lane) (0x800 + (lane) * 0x100 + 0x50)
+#define LYNX_28G_LNaRECR1(lane) (0x800 + (lane) * 0x100 + 0x54)
+#define LYNX_28G_LNaRECR2(lane) (0x800 + (lane) * 0x100 + 0x58)
+
+#define LYNX_28G_LNaRSCCR0(lane) (0x800 + (lane) * 0x100 + 0x74)
+
+#define LYNX_28G_LNaPSS(lane) (0x1000 + (lane) * 0x4)
+#define LYNX_28G_LNaPSS_TYPE(pss) (((pss) & GENMASK(30, 24)) >> 24)
+#define LYNX_28G_LNaPSS_TYPE_SGMII 0x4
+#define LYNX_28G_LNaPSS_TYPE_XFI 0x28
+
+#define LYNX_28G_SGMIIaCR1(lane) (0x1804 + (lane) * 0x10)
+#define LYNX_28G_SGMIIaCR1_SGPCS_EN BIT(11)
+#define LYNX_28G_SGMIIaCR1_SGPCS_DIS 0x0
+#define LYNX_28G_SGMIIaCR1_SGPCS_MSK BIT(11)
+
+struct lynx_28g_priv;
+
+struct lynx_28g_pll {
+ struct lynx_28g_priv *priv;
+ u32 rstctl, cr0, cr1;
+ int id;
+ DECLARE_PHY_INTERFACE_MASK(supported);
+};
+
+struct lynx_28g_lane {
+ struct lynx_28g_priv *priv;
+ struct phy *phy;
+ bool powered_up;
+ bool init;
+ unsigned int id;
+ phy_interface_t interface;
+};
+
+struct lynx_28g_priv {
+ void __iomem *base;
+ struct device *dev;
+ struct lynx_28g_pll pll[LYNX_28G_NUM_PLL];
+ struct lynx_28g_lane lane[LYNX_28G_NUM_LANE];
+
+ struct delayed_work cdr_check;
+};
+
+static void lynx_28g_rmw(struct lynx_28g_priv *priv, unsigned long off,
+ u32 val, u32 mask)
+{
+ void __iomem *reg = priv->base + off;
+ u32 orig, tmp;
+
+ orig = ioread32(reg);
+ tmp = orig & ~mask;
+ tmp |= val;
+ iowrite32(tmp, reg);
+}
+
+#define lynx_28g_lane_rmw(lane, reg, val, mask) \
+ lynx_28g_rmw((lane)->priv, LYNX_28G_##reg(lane->id), \
+ LYNX_28G_##reg##_##val, LYNX_28G_##reg##_##mask)
+#define lynx_28g_lane_read(lane, reg) \
+ ioread32((lane)->priv->base + LYNX_28G_##reg((lane)->id))
+#define lynx_28g_pll_read(pll, reg) \
+ ioread32((pll)->priv->base + LYNX_28G_##reg((pll)->id))
+
+static bool lynx_28g_supports_interface(struct lynx_28g_priv *priv, int intf)
+{
+ int i;
+
+ for (i = 0; i < LYNX_28G_NUM_PLL; i++) {
+ if (LYNX_28G_PLLnRSTCTL_DIS(priv->pll[i].rstctl))
+ continue;
+
+ if (test_bit(intf, priv->pll[i].supported))
+ return true;
+ }
+
+ return false;
+}
+
+static struct lynx_28g_pll *lynx_28g_pll_get(struct lynx_28g_priv *priv,
+ phy_interface_t intf)
+{
+ struct lynx_28g_pll *pll;
+ int i;
+
+ for (i = 0; i < LYNX_28G_NUM_PLL; i++) {
+ pll = &priv->pll[i];
+
+ if (LYNX_28G_PLLnRSTCTL_DIS(pll->rstctl))
+ continue;
+
+ if (test_bit(intf, pll->supported))
+ return pll;
+ }
+
+ return NULL;
+}
+
+static void lynx_28g_lane_set_nrate(struct lynx_28g_lane *lane,
+ struct lynx_28g_pll *pll,
+ phy_interface_t intf)
+{
+ switch (LYNX_28G_PLLnCR1_FRATE_SEL(pll->cr1)) {
+ case LYNX_28G_PLLnCR1_FRATE_5G_10GVCO:
+ case LYNX_28G_PLLnCR1_FRATE_5G_25GVCO:
+ switch (intf) {
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_1000BASEX:
+ lynx_28g_lane_rmw(lane, LNaTGCR0, N_RATE_QUARTER, N_RATE_MSK);
+ lynx_28g_lane_rmw(lane, LNaRGCR0, N_RATE_QUARTER, N_RATE_MSK);
+ break;
+ default:
+ break;
+ }
+ break;
+ case LYNX_28G_PLLnCR1_FRATE_10G_20GVCO:
+ switch (intf) {
+ case PHY_INTERFACE_MODE_10GBASER:
+ case PHY_INTERFACE_MODE_USXGMII:
+ lynx_28g_lane_rmw(lane, LNaTGCR0, N_RATE_FULL, N_RATE_MSK);
+ lynx_28g_lane_rmw(lane, LNaRGCR0, N_RATE_FULL, N_RATE_MSK);
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+static void lynx_28g_lane_set_pll(struct lynx_28g_lane *lane,
+ struct lynx_28g_pll *pll)
+{
+ if (pll->id == 0) {
+ lynx_28g_lane_rmw(lane, LNaTGCR0, USE_PLLF, USE_PLL_MSK);
+ lynx_28g_lane_rmw(lane, LNaRGCR0, USE_PLLF, USE_PLL_MSK);
+ } else {
+ lynx_28g_lane_rmw(lane, LNaTGCR0, USE_PLLS, USE_PLL_MSK);
+ lynx_28g_lane_rmw(lane, LNaRGCR0, USE_PLLS, USE_PLL_MSK);
+ }
+}
+
+static void lynx_28g_cleanup_lane(struct lynx_28g_lane *lane)
+{
+ u32 lane_offset = LYNX_28G_LNa_PCC_OFFSET(lane);
+ struct lynx_28g_priv *priv = lane->priv;
+
+ /* Cleanup the protocol configuration registers of the current protocol */
+ switch (lane->interface) {
+ case PHY_INTERFACE_MODE_10GBASER:
+ lynx_28g_rmw(priv, LYNX_28G_PCCC,
+ LYNX_28G_PCCC_SXGMII_DIS << lane_offset,
+ GENMASK(3, 0) << lane_offset);
+ break;
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_1000BASEX:
+ lynx_28g_rmw(priv, LYNX_28G_PCC8,
+ LYNX_28G_PCC8_SGMII_DIS << lane_offset,
+ GENMASK(3, 0) << lane_offset);
+ break;
+ default:
+ break;
+ }
+}
+
+static void lynx_28g_lane_set_sgmii(struct lynx_28g_lane *lane)
+{
+ u32 lane_offset = LYNX_28G_LNa_PCC_OFFSET(lane);
+ struct lynx_28g_priv *priv = lane->priv;
+ struct lynx_28g_pll *pll;
+
+ lynx_28g_cleanup_lane(lane);
+
+ /* Setup the lane to run in SGMII */
+ lynx_28g_rmw(priv, LYNX_28G_PCC8,
+ LYNX_28G_PCC8_SGMII << lane_offset,
+ GENMASK(3, 0) << lane_offset);
+
+ /* Setup the protocol select and SerDes parallel interface width */
+ lynx_28g_lane_rmw(lane, LNaGCR0, PROTO_SEL_SGMII, PROTO_SEL_MSK);
+ lynx_28g_lane_rmw(lane, LNaGCR0, IF_WIDTH_10_BIT, IF_WIDTH_MSK);
+
+ /* Switch to the PLL that works with this interface type */
+ pll = lynx_28g_pll_get(priv, PHY_INTERFACE_MODE_SGMII);
+ lynx_28g_lane_set_pll(lane, pll);
+
+ /* Choose the portion of clock net to be used on this lane */
+ lynx_28g_lane_set_nrate(lane, pll, PHY_INTERFACE_MODE_SGMII);
+
+ /* Enable the SGMII PCS */
+ lynx_28g_lane_rmw(lane, SGMIIaCR1, SGPCS_EN, SGPCS_MSK);
+
+ /* Configure the appropriate equalization parameters for the protocol */
+ iowrite32(0x00808006, priv->base + LYNX_28G_LNaTECR0(lane->id));
+ iowrite32(0x04310000, priv->base + LYNX_28G_LNaRGCR1(lane->id));
+ iowrite32(0x9f800000, priv->base + LYNX_28G_LNaRECR0(lane->id));
+ iowrite32(0x001f0000, priv->base + LYNX_28G_LNaRECR1(lane->id));
+ iowrite32(0x00000000, priv->base + LYNX_28G_LNaRECR2(lane->id));
+ iowrite32(0x00000000, priv->base + LYNX_28G_LNaRSCCR0(lane->id));
+}
+
+static void lynx_28g_lane_set_10gbaser(struct lynx_28g_lane *lane)
+{
+ u32 lane_offset = LYNX_28G_LNa_PCC_OFFSET(lane);
+ struct lynx_28g_priv *priv = lane->priv;
+ struct lynx_28g_pll *pll;
+
+ lynx_28g_cleanup_lane(lane);
+
+ /* Enable the SXGMII lane */
+ lynx_28g_rmw(priv, LYNX_28G_PCCC,
+ LYNX_28G_PCCC_10GBASER << lane_offset,
+ GENMASK(3, 0) << lane_offset);
+
+ /* Setup the protocol select and SerDes parallel interface width */
+ lynx_28g_lane_rmw(lane, LNaGCR0, PROTO_SEL_XFI, PROTO_SEL_MSK);
+ lynx_28g_lane_rmw(lane, LNaGCR0, IF_WIDTH_20_BIT, IF_WIDTH_MSK);
+
+ /* Switch to the PLL that works with this interface type */
+ pll = lynx_28g_pll_get(priv, PHY_INTERFACE_MODE_10GBASER);
+ lynx_28g_lane_set_pll(lane, pll);
+
+ /* Choose the portion of clock net to be used on this lane */
+ lynx_28g_lane_set_nrate(lane, pll, PHY_INTERFACE_MODE_10GBASER);
+
+ /* Disable the SGMII PCS */
+ lynx_28g_lane_rmw(lane, SGMIIaCR1, SGPCS_DIS, SGPCS_MSK);
+
+ /* Configure the appropriate equalization parameters for the protocol */
+ iowrite32(0x10808307, priv->base + LYNX_28G_LNaTECR0(lane->id));
+ iowrite32(0x10000000, priv->base + LYNX_28G_LNaRGCR1(lane->id));
+ iowrite32(0x00000000, priv->base + LYNX_28G_LNaRECR0(lane->id));
+ iowrite32(0x001f0000, priv->base + LYNX_28G_LNaRECR1(lane->id));
+ iowrite32(0x81000020, priv->base + LYNX_28G_LNaRECR2(lane->id));
+ iowrite32(0x00002000, priv->base + LYNX_28G_LNaRSCCR0(lane->id));
+}
+
+static int lynx_28g_power_off(struct phy *phy)
+{
+ struct lynx_28g_lane *lane = phy_get_drvdata(phy);
+ u32 trstctl, rrstctl;
+
+ if (!lane->powered_up)
+ return 0;
+
+ /* Issue a halt request */
+ lynx_28g_lane_rmw(lane, LNaTRSTCTL, HLT_REQ, HLT_REQ);
+ lynx_28g_lane_rmw(lane, LNaRRSTCTL, HLT_REQ, HLT_REQ);
+
+ /* Wait until the halting process is complete */
+ do {
+ trstctl = lynx_28g_lane_read(lane, LNaTRSTCTL);
+ rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL);
+ } while ((trstctl & LYNX_28G_LNaTRSTCTL_HLT_REQ) ||
+ (rrstctl & LYNX_28G_LNaRRSTCTL_HLT_REQ));
+
+ lane->powered_up = false;
+
+ return 0;
+}
+
+static int lynx_28g_power_on(struct phy *phy)
+{
+ struct lynx_28g_lane *lane = phy_get_drvdata(phy);
+ u32 trstctl, rrstctl;
+
+ if (lane->powered_up)
+ return 0;
+
+ /* Issue a reset request on the lane */
+ lynx_28g_lane_rmw(lane, LNaTRSTCTL, RST_REQ, RST_REQ);
+ lynx_28g_lane_rmw(lane, LNaRRSTCTL, RST_REQ, RST_REQ);
+
+ /* Wait until the reset sequence is completed */
+ do {
+ trstctl = lynx_28g_lane_read(lane, LNaTRSTCTL);
+ rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL);
+ } while (!(trstctl & LYNX_28G_LNaTRSTCTL_RST_DONE) ||
+ !(rrstctl & LYNX_28G_LNaRRSTCTL_RST_DONE));
+
+ lane->powered_up = true;
+
+ return 0;
+}
+
+static int lynx_28g_set_mode(struct phy *phy, enum phy_mode mode, int submode)
+{
+ struct lynx_28g_lane *lane = phy_get_drvdata(phy);
+ struct lynx_28g_priv *priv = lane->priv;
+ int powered_up = lane->powered_up;
+ int err = 0;
+
+ if (mode != PHY_MODE_ETHERNET)
+ return -EOPNOTSUPP;
+
+ if (lane->interface == PHY_INTERFACE_MODE_NA)
+ return -EOPNOTSUPP;
+
+ if (!lynx_28g_supports_interface(priv, submode))
+ return -EOPNOTSUPP;
+
+ /* If the lane is powered up, put the lane into the halt state while
+ * the reconfiguration is being done.
+ */
+ if (powered_up)
+ lynx_28g_power_off(phy);
+
+ switch (submode) {
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_1000BASEX:
+ lynx_28g_lane_set_sgmii(lane);
+ break;
+ case PHY_INTERFACE_MODE_10GBASER:
+ lynx_28g_lane_set_10gbaser(lane);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ lane->interface = submode;
+
+out:
+ /* Power up the lane if necessary */
+ if (powered_up)
+ lynx_28g_power_on(phy);
+
+ return err;
+}
+
+static int lynx_28g_validate(struct phy *phy, enum phy_mode mode, int submode,
+ union phy_configure_opts *opts __always_unused)
+{
+ struct lynx_28g_lane *lane = phy_get_drvdata(phy);
+ struct lynx_28g_priv *priv = lane->priv;
+
+ if (mode != PHY_MODE_ETHERNET)
+ return -EOPNOTSUPP;
+
+ if (!lynx_28g_supports_interface(priv, submode))
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+static int lynx_28g_init(struct phy *phy)
+{
+ struct lynx_28g_lane *lane = phy_get_drvdata(phy);
+
+ /* Mark the fact that the lane was init */
+ lane->init = true;
+
+ /* SerDes lanes are powered on at boot time. Any lane that is managed
+ * by this driver will get powered down at init time aka at dpaa2-eth
+ * probe time.
+ */
+ lane->powered_up = true;
+ lynx_28g_power_off(phy);
+
+ return 0;
+}
+
+static const struct phy_ops lynx_28g_ops = {
+ .init = lynx_28g_init,
+ .power_on = lynx_28g_power_on,
+ .power_off = lynx_28g_power_off,
+ .set_mode = lynx_28g_set_mode,
+ .validate = lynx_28g_validate,
+ .owner = THIS_MODULE,
+};
+
+static void lynx_28g_pll_read_configuration(struct lynx_28g_priv *priv)
+{
+ struct lynx_28g_pll *pll;
+ int i;
+
+ for (i = 0; i < LYNX_28G_NUM_PLL; i++) {
+ pll = &priv->pll[i];
+ pll->priv = priv;
+ pll->id = i;
+
+ pll->rstctl = lynx_28g_pll_read(pll, PLLnRSTCTL);
+ pll->cr0 = lynx_28g_pll_read(pll, PLLnCR0);
+ pll->cr1 = lynx_28g_pll_read(pll, PLLnCR1);
+
+ if (LYNX_28G_PLLnRSTCTL_DIS(pll->rstctl))
+ continue;
+
+ switch (LYNX_28G_PLLnCR1_FRATE_SEL(pll->cr1)) {
+ case LYNX_28G_PLLnCR1_FRATE_5G_10GVCO:
+ case LYNX_28G_PLLnCR1_FRATE_5G_25GVCO:
+ /* 5GHz clock net */
+ __set_bit(PHY_INTERFACE_MODE_1000BASEX, pll->supported);
+ __set_bit(PHY_INTERFACE_MODE_SGMII, pll->supported);
+ break;
+ case LYNX_28G_PLLnCR1_FRATE_10G_20GVCO:
+ /* 10.3125GHz clock net */
+ __set_bit(PHY_INTERFACE_MODE_10GBASER, pll->supported);
+ break;
+ default:
+ /* 6GHz, 12.890625GHz, 8GHz */
+ break;
+ }
+ }
+}
+
+#define work_to_lynx(w) container_of((w), struct lynx_28g_priv, cdr_check.work)
+
+static void lynx_28g_cdr_lock_check(struct work_struct *work)
+{
+ struct lynx_28g_priv *priv = work_to_lynx(work);
+ struct lynx_28g_lane *lane;
+ u32 rrstctl;
+ int i;
+
+ for (i = 0; i < LYNX_28G_NUM_LANE; i++) {
+ lane = &priv->lane[i];
+
+ if (!lane->init)
+ continue;
+
+ if (!lane->powered_up)
+ continue;
+
+ rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL);
+ if (!(rrstctl & LYNX_28G_LNaRRSTCTL_CDR_LOCK)) {
+ lynx_28g_lane_rmw(lane, LNaRRSTCTL, RST_REQ, RST_REQ);
+ do {
+ rrstctl = lynx_28g_lane_read(lane, LNaRRSTCTL);
+ } while (!(rrstctl & LYNX_28G_LNaRRSTCTL_RST_DONE));
+ }
+ }
+ queue_delayed_work(system_power_efficient_wq, &priv->cdr_check,
+ msecs_to_jiffies(1000));
+}
+
+static void lynx_28g_lane_read_configuration(struct lynx_28g_lane *lane)
+{
+ u32 pss, protocol;
+
+ pss = lynx_28g_lane_read(lane, LNaPSS);
+ protocol = LYNX_28G_LNaPSS_TYPE(pss);
+ switch (protocol) {
+ case LYNX_28G_LNaPSS_TYPE_SGMII:
+ lane->interface = PHY_INTERFACE_MODE_SGMII;
+ break;
+ case LYNX_28G_LNaPSS_TYPE_XFI:
+ lane->interface = PHY_INTERFACE_MODE_10GBASER;
+ break;
+ default:
+ lane->interface = PHY_INTERFACE_MODE_NA;
+ }
+}
+
+static struct phy *lynx_28g_xlate(struct device *dev,
+ struct of_phandle_args *args)
+{
+ struct lynx_28g_priv *priv = dev_get_drvdata(dev);
+ int idx = args->args[0];
+
+ if (WARN_ON(idx >= LYNX_28G_NUM_LANE))
+ return ERR_PTR(-EINVAL);
+
+ return priv->lane[idx].phy;
+}
+
+static int lynx_28g_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct phy_provider *provider;
+ struct lynx_28g_priv *priv;
+ int i;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+ priv->dev = &pdev->dev;
+
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ lynx_28g_pll_read_configuration(priv);
+
+ for (i = 0; i < LYNX_28G_NUM_LANE; i++) {
+ struct lynx_28g_lane *lane = &priv->lane[i];
+ struct phy *phy;
+
+ memset(lane, 0, sizeof(*lane));
+
+ phy = devm_phy_create(&pdev->dev, NULL, &lynx_28g_ops);
+ if (IS_ERR(phy))
+ return PTR_ERR(phy);
+
+ lane->priv = priv;
+ lane->phy = phy;
+ lane->id = i;
+ phy_set_drvdata(phy, lane);
+ lynx_28g_lane_read_configuration(lane);
+ }
+
+ dev_set_drvdata(dev, priv);
+
+ INIT_DELAYED_WORK(&priv->cdr_check, lynx_28g_cdr_lock_check);
+
+ queue_delayed_work(system_power_efficient_wq, &priv->cdr_check,
+ msecs_to_jiffies(1000));
+
+ dev_set_drvdata(&pdev->dev, priv);
+ provider = devm_of_phy_provider_register(&pdev->dev, lynx_28g_xlate);
+
+ return PTR_ERR_OR_ZERO(provider);
+}
+
+static const struct of_device_id lynx_28g_of_match_table[] = {
+ { .compatible = "fsl,lynx-28g" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, lynx_28g_of_match_table);
+
+static struct platform_driver lynx_28g_driver = {
+ .probe = lynx_28g_probe,
+ .driver = {
+ .name = "lynx-28g",
+ .of_match_table = lynx_28g_of_match_table,
+ },
+};
+module_platform_driver(lynx_28g_driver);
+
+MODULE_AUTHOR("Ioana Ciornei <ioana.ciornei@nxp.com>");
+MODULE_DESCRIPTION("Lynx 28G SerDes PHY driver for Layerscape SoCs");
+MODULE_LICENSE("GPL v2");
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