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| author | Kishon Vijay Abraham I <kishon@ti.com> | 2019-12-16 12:57:07 +0300 |
|---|---|---|
| committer | Kishon Vijay Abraham I <kishon@ti.com> | 2020-01-08 10:28:06 +0300 |
| commit | adc4bd6f6545bedc5547c76c2bf52257a8fffa97 (patch) | |
| tree | 238d532f49e0caa27a8b7d4f96ec9ec3b69c0d66 /drivers/phy | |
| parent | b872936f5757412ec11039ffe895e1b9249d6b68 (diff) | |
| download | linux-adc4bd6f6545bedc5547c76c2bf52257a8fffa97.tar.xz | |
phy: cadence: Sierra: Check for PLL lock during PHY power on
Check for PLL lock during PHY power on.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/cadence/phy-cadence-sierra.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/phy/cadence/phy-cadence-sierra.c b/drivers/phy/cadence/phy-cadence-sierra.c index 497c83827670..62bff4b043f0 100644 --- a/drivers/phy/cadence/phy-cadence-sierra.c +++ b/drivers/phy/cadence/phy-cadence-sierra.c @@ -55,6 +55,7 @@ #define SIERRA_PLLCTRL_SUBRATE_PREG 0x03A #define SIERRA_PLLCTRL_GEN_D_PREG 0x03E #define SIERRA_PLLCTRL_CPGAIN_MODE_PREG 0x03F +#define SIERRA_PLLCTRL_STATUS_PREG 0x044 #define SIERRA_CLKPATH_BIASTRIM_PREG 0x04B #define SIERRA_DFE_BIASTRIM_PREG 0x04C #define SIERRA_DRVCTRL_ATTEN_PREG 0x06A @@ -141,11 +142,14 @@ #define SIERRA_MACRO_ID 0x00007364 #define SIERRA_MAX_LANES 4 +#define PLL_LOCK_TIME 100000 static const struct reg_field macro_id_type = REG_FIELD(SIERRA_MACRO_ID_REG, 0, 15); static const struct reg_field phy_pll_cfg_1 = REG_FIELD(SIERRA_PHY_PLL_CFG, 1, 1); +static const struct reg_field pllctrl_lock = + REG_FIELD(SIERRA_PLLCTRL_STATUS_PREG, 0, 0); struct cdns_sierra_inst { struct phy *phy; @@ -192,6 +196,7 @@ struct cdns_sierra_phy { struct regmap *regmap_common_cdb; struct regmap_field *macro_id_type; struct regmap_field *phy_pll_cfg_1; + struct regmap_field *pllctrl_lock[SIERRA_MAX_LANES]; struct clk *clk; int nsubnodes; bool autoconf; @@ -291,10 +296,25 @@ static int cdns_sierra_phy_init(struct phy *gphy) static int cdns_sierra_phy_on(struct phy *gphy) { + struct cdns_sierra_phy *sp = dev_get_drvdata(gphy->dev.parent); struct cdns_sierra_inst *ins = phy_get_drvdata(gphy); + struct device *dev = sp->dev; + u32 val; + int ret; /* Take the PHY lane group out of reset */ - return reset_control_deassert(ins->lnk_rst); + ret = reset_control_deassert(ins->lnk_rst); + if (ret) { + dev_err(dev, "Failed to take the PHY lane out of reset\n"); + return ret; + } + + ret = regmap_field_read_poll_timeout(sp->pllctrl_lock[ins->mlane], + val, val, 1000, PLL_LOCK_TIME); + if (ret < 0) + dev_err(dev, "PLL lock of lane failed\n"); + + return ret; } static int cdns_sierra_phy_off(struct phy *gphy) @@ -350,6 +370,7 @@ static int cdns_regfield_init(struct cdns_sierra_phy *sp) struct device *dev = sp->dev; struct regmap_field *field; struct regmap *regmap; + int i; regmap = sp->regmap_common_cdb; field = devm_regmap_field_alloc(dev, regmap, macro_id_type); @@ -367,6 +388,16 @@ static int cdns_regfield_init(struct cdns_sierra_phy *sp) } sp->phy_pll_cfg_1 = field; + for (i = 0; i < SIERRA_MAX_LANES; i++) { + regmap = sp->regmap_lane_cdb[i]; + field = devm_regmap_field_alloc(dev, regmap, pllctrl_lock); + if (IS_ERR(field)) { + dev_err(dev, "P%d_ENABLE reg field init failed\n", i); + return PTR_ERR(field); + } + sp->pllctrl_lock[i] = field; + } + return 0; } |