[PATCH 3/5] phy: cadence-torrent: Add support for derived reference clock output
From: Swapnil Jakhade
Date: Wed Sep 08 2021 - 14:27:35 EST
Update the reference clock driver implementation where cmn_refclk_<p/m>
is configured to output the reference clock. cmn_refclk_p/m will output
either derived or received reference clock based on the selection. So,
all these clocks should be modelled separately. Model the derived
reference clock here as a first step to support reference clock driver.
Signed-off-by: Swapnil Jakhade <sjakhade@xxxxxxxxxxx>
---
drivers/phy/cadence/phy-cadence-torrent.c | 78 +++++++++--------------
1 file changed, 31 insertions(+), 47 deletions(-)
diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index ecb1aa883c05..6dceb12e88c4 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -235,10 +235,11 @@
#define PHY_PMA_CMN_CTRL2 0x0001U
#define PHY_PMA_PLL_RAW_CTRL 0x0003U
-#define CDNS_TORRENT_OUTPUT_CLOCKS 1
+#define CDNS_TORRENT_OUTPUT_CLOCKS 2
static const char * const clk_names[] = {
[CDNS_TORRENT_REFCLK_DRIVER] = "refclk-driver",
+ [CDNS_TORRENT_DERIVED_REFCLK] = "refclk-der",
};
static const struct reg_field phy_pll_cfg =
@@ -261,23 +262,8 @@ static const struct reg_field phy_pcs_iso_link_ctrl_1 =
static const struct reg_field phy_pipe_cmn_ctrl1_0 = REG_FIELD(PHY_PIPE_CMN_CTRL1, 0, 0);
-#define REFCLK_OUT_NUM_CMN_CONFIG 5
-
-enum cdns_torrent_refclk_out_cmn {
- CMN_CDIAG_REFCLK_OVRD_4,
- CMN_CDIAG_REFCLK_DRV0_CTRL_1,
- CMN_CDIAG_REFCLK_DRV0_CTRL_4,
- CMN_CDIAG_REFCLK_DRV0_CTRL_5,
- CMN_CDIAG_REFCLK_DRV0_CTRL_6,
-};
-
-static const struct reg_field refclk_out_cmn_cfg[] = {
- [CMN_CDIAG_REFCLK_OVRD_4] = REG_FIELD(CMN_CDIAG_REFCLK_OVRD, 4, 4),
- [CMN_CDIAG_REFCLK_DRV0_CTRL_1] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 1, 1),
- [CMN_CDIAG_REFCLK_DRV0_CTRL_4] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 4, 4),
- [CMN_CDIAG_REFCLK_DRV0_CTRL_5] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 5, 5),
- [CMN_CDIAG_REFCLK_DRV0_CTRL_6] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 6, 6),
-};
+static const struct reg_field cmn_cdiag_refclk_ovrd_4 =
+ REG_FIELD(CMN_CDIAG_REFCLK_OVRD, 4, 4);
enum cdns_torrent_phy_type {
TYPE_NONE,
@@ -330,6 +316,8 @@ struct cdns_torrent_phy {
struct regmap *regmap_phy_pcs_lane_cdb[MAX_NUM_LANES];
struct regmap *regmap_dptx_phy_reg;
struct regmap_field *phy_pll_cfg;
+ struct regmap_field *phy_pipe_cmn_ctrl1_0;
+ struct regmap_field *cmn_cdiag_refclk_ovrd_4;
struct regmap_field *phy_pma_cmn_ctrl_1;
struct regmap_field *phy_pma_cmn_ctrl_2;
struct regmap_field *phy_pma_pll_raw_ctrl;
@@ -348,7 +336,7 @@ enum phy_powerstate {
struct cdns_torrent_derived_refclk {
struct clk_hw hw;
struct regmap_field *phy_pipe_cmn_ctrl1_0;
- struct regmap_field *cmn_fields[REFCLK_OUT_NUM_CMN_CONFIG];
+ struct regmap_field *cmn_cdiag_refclk_ovrd_4;
struct clk_init_data clk_data;
};
@@ -1618,11 +1606,7 @@ static int cdns_torrent_derived_refclk_enable(struct clk_hw *hw)
{
struct cdns_torrent_derived_refclk *derived_refclk = to_cdns_torrent_derived_refclk(hw);
- regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_6], 0);
- regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_4], 1);
- regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_5], 1);
- regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_1], 0);
- regmap_field_write(derived_refclk->cmn_fields[CMN_CDIAG_REFCLK_OVRD_4], 1);
+ regmap_field_write(derived_refclk->cmn_cdiag_refclk_ovrd_4, 1);
regmap_field_write(derived_refclk->phy_pipe_cmn_ctrl1_0, 1);
return 0;
@@ -1633,6 +1617,7 @@ static void cdns_torrent_derived_refclk_disable(struct clk_hw *hw)
struct cdns_torrent_derived_refclk *derived_refclk = to_cdns_torrent_derived_refclk(hw);
regmap_field_write(derived_refclk->phy_pipe_cmn_ctrl1_0, 0);
+ regmap_field_write(derived_refclk->cmn_cdiag_refclk_ovrd_4, 0);
}
static int cdns_torrent_derived_refclk_is_enabled(struct clk_hw *hw)
@@ -1640,7 +1625,7 @@ static int cdns_torrent_derived_refclk_is_enabled(struct clk_hw *hw)
struct cdns_torrent_derived_refclk *derived_refclk = to_cdns_torrent_derived_refclk(hw);
int val;
- regmap_field_read(derived_refclk->phy_pipe_cmn_ctrl1_0, &val);
+ regmap_field_read(derived_refclk->cmn_cdiag_refclk_ovrd_4, &val);
return !!val;
}
@@ -1655,21 +1640,19 @@ static int cdns_torrent_derived_refclk_register(struct cdns_torrent_phy *cdns_ph
{
struct cdns_torrent_derived_refclk *derived_refclk;
struct device *dev = cdns_phy->dev;
- struct regmap_field *field;
struct clk_init_data *init;
const char *parent_name;
- struct regmap *regmap;
char clk_name[100];
struct clk_hw *hw;
struct clk *clk;
- int i, ret;
+ int ret;
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_TORRENT_REFCLK_DRIVER]);
+ clk_names[CDNS_TORRENT_DERIVED_REFCLK]);
clk = devm_clk_get_optional(dev, "phy_en_refclk");
if (IS_ERR(clk)) {
@@ -1688,23 +1671,8 @@ static int cdns_torrent_derived_refclk_register(struct cdns_torrent_phy *cdns_ph
init->flags = 0;
init->name = clk_name;
- regmap = cdns_phy->regmap_phy_pcs_common_cdb;
- field = devm_regmap_field_alloc(dev, regmap, phy_pipe_cmn_ctrl1_0);
- if (IS_ERR(field)) {
- dev_err(dev, "phy_pipe_cmn_ctrl1_0 reg field init failed\n");
- return PTR_ERR(field);
- }
- derived_refclk->phy_pipe_cmn_ctrl1_0 = field;
-
- regmap = cdns_phy->regmap_common_cdb;
- for (i = 0; i < REFCLK_OUT_NUM_CMN_CONFIG; i++) {
- field = devm_regmap_field_alloc(dev, regmap, refclk_out_cmn_cfg[i]);
- if (IS_ERR(field)) {
- dev_err(dev, "CMN reg field init failed\n");
- return PTR_ERR(field);
- }
- derived_refclk->cmn_fields[i] = field;
- }
+ derived_refclk->phy_pipe_cmn_ctrl1_0 = cdns_phy->phy_pipe_cmn_ctrl1_0;
+ derived_refclk->cmn_cdiag_refclk_ovrd_4 = cdns_phy->cmn_cdiag_refclk_ovrd_4;
derived_refclk->hw.init = init;
@@ -1713,7 +1681,7 @@ static int cdns_torrent_derived_refclk_register(struct cdns_torrent_phy *cdns_ph
if (ret)
return ret;
- cdns_phy->clk_hw_data->hws[CDNS_TORRENT_REFCLK_DRIVER] = hw;
+ cdns_phy->clk_hw_data->hws[CDNS_TORRENT_DERIVED_REFCLK] = hw;
return 0;
}
@@ -1768,6 +1736,22 @@ static int cdns_torrent_regfield_init(struct cdns_torrent_phy *cdns_phy)
}
cdns_phy->phy_pll_cfg = field;
+ regmap = cdns_phy->regmap_phy_pcs_common_cdb;
+ field = devm_regmap_field_alloc(dev, regmap, phy_pipe_cmn_ctrl1_0);
+ if (IS_ERR(field)) {
+ dev_err(dev, "phy_pipe_cmn_ctrl1_0 reg field init failed\n");
+ return PTR_ERR(field);
+ }
+ cdns_phy->phy_pipe_cmn_ctrl1_0 = field;
+
+ regmap = cdns_phy->regmap_common_cdb;
+ field = devm_regmap_field_alloc(dev, regmap, cmn_cdiag_refclk_ovrd_4);
+ if (IS_ERR(field)) {
+ dev_err(dev, "cmn_cdiag_refclk_ovrd_4 reg field init failed\n");
+ return PTR_ERR(field);
+ }
+ cdns_phy->cmn_cdiag_refclk_ovrd_4 = 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)) {
--
2.26.1