diff options
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/cadence/phy-cadence-sierra.c | 109 |
1 files changed, 108 insertions, 1 deletions
diff --git a/drivers/phy/cadence/phy-cadence-sierra.c b/drivers/phy/cadence/phy-cadence-sierra.c index e2b0530ca04c..da24acd26666 100644 --- a/drivers/phy/cadence/phy-cadence-sierra.c +++ b/drivers/phy/cadence/phy-cadence-sierra.c @@ -34,6 +34,7 @@ #define SIERRA_CMN_PLLLC_LF_COEFF_MODE1_PREG 0x49 #define SIERRA_CMN_PLLLC_LF_COEFF_MODE0_PREG 0x4A #define SIERRA_CMN_PLLLC_LOCK_CNTSTART_PREG 0x4B +#define SIERRA_CMN_PLLLC_CLK1_PREG 0x4D #define SIERRA_CMN_PLLLC_BWCAL_MODE1_PREG 0x4F #define SIERRA_CMN_PLLLC_BWCAL_MODE0_PREG 0x50 #define SIERRA_CMN_PLLLC_DSMCORR_PREG 0x51 @@ -203,7 +204,7 @@ #define SIERRA_MAX_LANES 16 #define PLL_LOCK_TIME 100000 -#define CDNS_SIERRA_OUTPUT_CLOCKS 2 +#define CDNS_SIERRA_OUTPUT_CLOCKS 3 #define CDNS_SIERRA_INPUT_CLOCKS 5 enum cdns_sierra_clock_input { PHY_CLK, @@ -226,10 +227,15 @@ static const struct reg_field pllctrl_lock = REG_FIELD(SIERRA_PLLCTRL_STATUS_PREG, 0, 0); static const struct reg_field phy_iso_link_ctrl_1 = REG_FIELD(SIERRA_PHY_ISO_LINK_CTRL, 1, 1); +static const struct reg_field cmn_plllc_clk1outdiv_preg = + REG_FIELD(SIERRA_CMN_PLLLC_CLK1_PREG, 0, 6); +static const struct reg_field cmn_plllc_clk1_en_preg = + REG_FIELD(SIERRA_CMN_PLLLC_CLK1_PREG, 12, 12); static const char * const clk_names[] = { [CDNS_SIERRA_PLL_CMNLC] = "pll_cmnlc", [CDNS_SIERRA_PLL_CMNLC1] = "pll_cmnlc1", + [CDNS_SIERRA_DERIVED_REFCLK] = "refclk_der", }; enum cdns_sierra_cmn_plllc { @@ -277,6 +283,16 @@ static u32 cdns_sierra_pll_mux_table[][SIERRA_NUM_CMN_PLLC_PARENTS] = { [CMN_PLLLC1] = { 1, 0 }, }; +struct cdns_sierra_derived_refclk { + struct clk_hw hw; + struct regmap_field *cmn_plllc_clk1outdiv_preg; + struct regmap_field *cmn_plllc_clk1_en_preg; + struct clk_init_data clk_data; +}; + +#define to_cdns_sierra_derived_refclk(_hw) \ + container_of(_hw, struct cdns_sierra_derived_refclk, hw) + enum cdns_sierra_phy_type { TYPE_NONE, TYPE_PCIE, @@ -766,6 +782,91 @@ static int cdns_sierra_phy_register_pll_mux(struct cdns_sierra_phy *sp) return 0; } +static int cdns_sierra_derived_refclk_enable(struct clk_hw *hw) +{ + struct cdns_sierra_derived_refclk *derived_refclk = to_cdns_sierra_derived_refclk(hw); + + regmap_field_write(derived_refclk->cmn_plllc_clk1_en_preg, 0x1); + + /* Programming to get 100Mhz clock output in ref_der_clk_out 5GHz VCO/50 = 100MHz */ + regmap_field_write(derived_refclk->cmn_plllc_clk1outdiv_preg, 0x2E); + + return 0; +} + +static void cdns_sierra_derived_refclk_disable(struct clk_hw *hw) +{ + struct cdns_sierra_derived_refclk *derived_refclk = to_cdns_sierra_derived_refclk(hw); + + regmap_field_write(derived_refclk->cmn_plllc_clk1_en_preg, 0); +} + +static int cdns_sierra_derived_refclk_is_enabled(struct clk_hw *hw) +{ + struct cdns_sierra_derived_refclk *derived_refclk = to_cdns_sierra_derived_refclk(hw); + int val; + + regmap_field_read(derived_refclk->cmn_plllc_clk1_en_preg, &val); + + return !!val; +} + +static const struct clk_ops cdns_sierra_derived_refclk_ops = { + .enable = cdns_sierra_derived_refclk_enable, + .disable = cdns_sierra_derived_refclk_disable, + .is_enabled = cdns_sierra_derived_refclk_is_enabled, +}; + +static int cdns_sierra_derived_refclk_register(struct cdns_sierra_phy *sp) +{ + struct cdns_sierra_derived_refclk *derived_refclk; + struct device *dev = sp->dev; + struct regmap_field *field; + struct clk_init_data *init; + struct regmap *regmap; + char clk_name[100]; + struct clk *clk; + + derived_refclk = devm_kzalloc(dev, sizeof(*derived_refclk), GFP_KERNEL); + if (!derived_refclk) + return -ENOMEM; + + snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev), + clk_names[CDNS_SIERRA_DERIVED_REFCLK]); + + init = &derived_refclk->clk_data; + + init->ops = &cdns_sierra_derived_refclk_ops; + init->flags = 0; + init->name = clk_name; + + regmap = sp->regmap_common_cdb; + + field = devm_regmap_field_alloc(dev, regmap, cmn_plllc_clk1outdiv_preg); + if (IS_ERR(field)) { + dev_err(dev, "cmn_plllc_clk1outdiv_preg reg field init failed\n"); + return PTR_ERR(field); + } + derived_refclk->cmn_plllc_clk1outdiv_preg = field; + + field = devm_regmap_field_alloc(dev, regmap, cmn_plllc_clk1_en_preg); + if (IS_ERR(field)) { + dev_err(dev, "cmn_plllc_clk1_en_preg reg field init failed\n"); + return PTR_ERR(field); + } + derived_refclk->cmn_plllc_clk1_en_preg = field; + + derived_refclk->hw.init = init; + + clk = devm_clk_register(dev, &derived_refclk->hw); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + sp->output_clks[CDNS_SIERRA_DERIVED_REFCLK] = clk; + + return 0; +} + static void cdns_sierra_clk_unregister(struct cdns_sierra_phy *sp) { struct device *dev = sp->dev; @@ -786,6 +887,12 @@ static int cdns_sierra_clk_register(struct cdns_sierra_phy *sp) return ret; } + ret = cdns_sierra_derived_refclk_register(sp); + if (ret) { + dev_err(dev, "Failed to register derived refclk\n"); + return ret; + } + sp->clk_data.clks = sp->output_clks; sp->clk_data.clk_num = CDNS_SIERRA_OUTPUT_CLOCKS; ret = of_clk_add_provider(node, of_clk_src_onecell_get, &sp->clk_data); |