diff options
| author | Swapnil Jakhade <sjakhade@cadence.com> | 2020-09-17 10:30:35 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-09-18 08:17:18 +0300 |
| commit | 8e4c95b9c9f4413a12f94379dccd9e31a36483a4 (patch) | |
| tree | 733b11c0390f2875855da33198ee13f2f8719999 /drivers/phy/cadence | |
| parent | b54b47bd035bcff42e454db07cda9636cb71880b (diff) | |
| download | linux-8e4c95b9c9f4413a12f94379dccd9e31a36483a4.tar.xz | |
phy: cadence-torrent: Check cmn_ready assertion during PHY power on
Check if cmn_ready is set after both PLL0 and PLL1 are locked.
Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-3-git-send-email-sjakhade@cadence.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/phy/cadence')
| -rw-r--r-- | drivers/phy/cadence/phy-cadence-torrent.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c index 052cff34208d..9e900f389b08 100644 --- a/drivers/phy/cadence/phy-cadence-torrent.c +++ b/drivers/phy/cadence/phy-cadence-torrent.c @@ -32,6 +32,7 @@ #define NUM_PHY_TYPE 2 #define POLL_TIMEOUT_US 5000 +#define PLL_LOCK_TIMEOUT 100000 #define TORRENT_COMMON_CDB_OFFSET 0x0 @@ -183,12 +184,16 @@ #define PHY_PLL_CFG 0x000EU /* PHY PMA common registers */ +#define PHY_PMA_CMN_CTRL1 0x0000U #define PHY_PMA_CMN_CTRL2 0x0001U #define PHY_PMA_PLL_RAW_CTRL 0x0003U static const struct reg_field phy_pll_cfg = REG_FIELD(PHY_PLL_CFG, 0, 1); +static const struct reg_field phy_pma_cmn_ctrl_1 = + REG_FIELD(PHY_PMA_CMN_CTRL1, 0, 0); + static const struct reg_field phy_pma_cmn_ctrl_2 = REG_FIELD(PHY_PMA_CMN_CTRL2, 0, 7); @@ -237,6 +242,7 @@ struct cdns_torrent_phy { struct regmap *regmap_rx_lane_cdb[MAX_NUM_LANES]; struct regmap *regmap_dptx_phy_reg; struct regmap_field *phy_pll_cfg; + struct regmap_field *phy_pma_cmn_ctrl_1; struct regmap_field *phy_pma_cmn_ctrl_2; struct regmap_field *phy_pma_pll_raw_ctrl; struct regmap_field *phy_reset_ctrl; @@ -1570,6 +1576,7 @@ static int cdns_torrent_phy_on(struct phy *phy) { struct cdns_torrent_inst *inst = phy_get_drvdata(phy); struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent); + u32 read_val; int ret; /* Take the PHY out of reset */ @@ -1578,7 +1585,21 @@ static int cdns_torrent_phy_on(struct phy *phy) return ret; /* Take the PHY lane group out of reset */ - return reset_control_deassert(inst->lnk_rst); + reset_control_deassert(inst->lnk_rst); + + /* + * Wait for cmn_ready assertion + * PHY_PMA_CMN_CTRL1[0] == 1 + */ + ret = regmap_field_read_poll_timeout(cdns_phy->phy_pma_cmn_ctrl_1, + read_val, read_val, 1000, + PLL_LOCK_TIMEOUT); + if (ret) { + dev_err(cdns_phy->dev, "Timeout waiting for CMN ready\n"); + return ret; + } + + return 0; } static int cdns_torrent_phy_off(struct phy *phy) @@ -1644,6 +1665,14 @@ static int cdns_torrent_regfield_init(struct cdns_torrent_phy *cdns_phy) cdns_phy->phy_pll_cfg = field; regmap = cdns_phy->regmap_phy_pma_common_cdb; + field = devm_regmap_field_alloc(dev, regmap, phy_pma_cmn_ctrl_1); + if (IS_ERR(field)) { + dev_err(dev, "PHY_PMA_CMN_CTRL1 reg field init failed\n"); + return PTR_ERR(field); + } + cdns_phy->phy_pma_cmn_ctrl_1 = field; + + regmap = cdns_phy->regmap_phy_pma_common_cdb; field = devm_regmap_field_alloc(dev, regmap, phy_pma_cmn_ctrl_2); if (IS_ERR(field)) { dev_err(dev, "PHY_PMA_CMN_CTRL2 reg field init failed\n"); |