Add support to output received reference clock. Model the received
reference clock as an alternate parent of reference clock driver
clock. When received refclk is selected to output on cmn_refclk_p/m,
this is the internal reference clock driven on the pma_cmn_refclk_int.
Signed-off-by: Swapnil Jakhade <sjakhade@xxxxxxxxxxx>
---
drivers/phy/cadence/phy-cadence-torrent.c | 159 ++++++++++++++++++++--
1 file changed, 148 insertions(+), 11 deletions(-)
diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c
index 615aca6bd52b..5786166133d3 100644
--- a/drivers/phy/cadence/phy-cadence-torrent.c
+++ b/drivers/phy/cadence/phy-cadence-torrent.c
@@ -235,11 +235,12 @@
#define PHY_PMA_CMN_CTRL2 0x0001U
#define PHY_PMA_PLL_RAW_CTRL 0x0003U
-#define CDNS_TORRENT_OUTPUT_CLOCKS 2
+#define CDNS_TORRENT_OUTPUT_CLOCKS 3
static const char * const clk_names[] = {
[CDNS_TORRENT_REFCLK_DRIVER] = "refclk-driver",
[CDNS_TORRENT_DERIVED_REFCLK] = "refclk-der",
+ [CDNS_TORRENT_RECEIVED_REFCLK] = "refclk-rec",
};
static const struct reg_field phy_pll_cfg =
@@ -281,6 +282,13 @@ static const struct reg_field refclk_out_cmn_cfg[] = {
[CMN_CDIAG_REFCLK_DRV0_CTRL_6] = REG_FIELD(CMN_CDIAG_REFCLK_DRV0_CTRL, 6, 6),
};
+static const int refclk_driver_parent_index[] = {
+ CDNS_TORRENT_DERIVED_REFCLK,
+ CDNS_TORRENT_RECEIVED_REFCLK
+};
+
+static u32 cdns_torrent_refclk_driver_mux_table[] = { 1, 0 };
+
enum cdns_torrent_phy_type {
TYPE_NONE,
TYPE_DP,
@@ -368,6 +376,16 @@ struct cdns_torrent_derived_refclk {
#define to_cdns_torrent_derived_refclk(_hw) \
container_of(_hw, struct cdns_torrent_derived_refclk, hw)
+struct cdns_torrent_received_refclk {
+ struct clk_hw hw;
+ struct regmap_field *phy_pipe_cmn_ctrl1_0;
+ struct regmap_field *cmn_cdiag_refclk_ovrd_4;
+ struct clk_init_data clk_data;
+};
+
+#define to_cdns_torrent_received_refclk(_hw) \
+ container_of(_hw, struct cdns_torrent_received_refclk, hw)
+
struct cdns_reg_pairs {
u32 val;
u32 off;
@@ -1711,12 +1729,94 @@ static int cdns_torrent_derived_refclk_register(struct cdns_torrent_phy *cdns_ph
return 0;
}
+static int cdns_torrent_received_refclk_enable(struct clk_hw *hw)
+{
+ struct cdns_torrent_received_refclk *received_refclk = to_cdns_torrent_received_refclk(hw);
+
+ regmap_field_write(received_refclk->phy_pipe_cmn_ctrl1_0, 1);
+
+ return 0;
+}
+
+static void cdns_torrent_received_refclk_disable(struct clk_hw *hw)
+{
+ struct cdns_torrent_received_refclk *received_refclk = to_cdns_torrent_received_refclk(hw);
+
+ regmap_field_write(received_refclk->phy_pipe_cmn_ctrl1_0, 0);
+}
+
+static int cdns_torrent_received_refclk_is_enabled(struct clk_hw *hw)
+{
+ struct cdns_torrent_received_refclk *received_refclk = to_cdns_torrent_received_refclk(hw);
+ int val, cmn_val;
+
+ regmap_field_read(received_refclk->phy_pipe_cmn_ctrl1_0, &val);
+ regmap_field_read(received_refclk->cmn_cdiag_refclk_ovrd_4, &cmn_val);
+
+ return val && !cmn_val;
+}
+
+static const struct clk_ops cdns_torrent_received_refclk_ops = {
+ .enable = cdns_torrent_received_refclk_enable,
+ .disable = cdns_torrent_received_refclk_disable,
+ .is_enabled = cdns_torrent_received_refclk_is_enabled,
+};
+
+static int cdns_torrent_received_refclk_register(struct cdns_torrent_phy *cdns_phy)
+{
+ struct cdns_torrent_received_refclk *received_refclk;
+ struct device *dev = cdns_phy->dev;
+ struct clk_init_data *init;
+ const char *parent_name;
+ char clk_name[100];
+ struct clk_hw *hw;
+ struct clk *clk;
+ int ret;
+
+ received_refclk = devm_kzalloc(dev, sizeof(*received_refclk), GFP_KERNEL);
+ if (!received_refclk)
+ return -ENOMEM;
+
+ snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev),
+ clk_names[CDNS_TORRENT_RECEIVED_REFCLK]);
+
+ clk = devm_clk_get_optional(dev, "phy_en_refclk");
+ if (IS_ERR(clk)) {
+ dev_err(dev, "No parent clock for received_refclk\n");
+ return PTR_ERR(clk);
+ }
+
+ init = &received_refclk->clk_data;
+
+ if (clk) {
+ parent_name = __clk_get_name(clk);
+ init->parent_names = &parent_name;
+ init->num_parents = 1;
+ }
+ init->ops = &cdns_torrent_received_refclk_ops;
+ init->flags = 0;
+ init->name = clk_name;
+
+ received_refclk->phy_pipe_cmn_ctrl1_0 = cdns_phy->phy_pipe_cmn_ctrl1_0;
+ received_refclk->cmn_cdiag_refclk_ovrd_4 = cdns_phy->cmn_cdiag_refclk_ovrd_4;
+
+ received_refclk->hw.init = init;
+
+ hw = &received_refclk->hw;
+ ret = devm_clk_hw_register(dev, hw);
+ if (ret)
+ return ret;
+
+ cdns_phy->clk_hw_data->hws[CDNS_TORRENT_RECEIVED_REFCLK] = hw;
+
+ return 0;
+}
+
static int cdns_torrent_refclk_driver_enable(struct clk_hw *hw)
{
struct cdns_torrent_refclk_driver *refclk_driver = to_cdns_torrent_refclk_driver(hw);
regmap_field_write(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_6], 0);
- regmap_field_write(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_4], 1);
regmap_field_write(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_5], 1);
regmap_field_write(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_1], 0);
@@ -1740,10 +1840,30 @@ static int cdns_torrent_refclk_driver_is_enabled(struct clk_hw *hw)
return !val;
}
+static u8 cdns_torrent_refclk_driver_get_parent(struct clk_hw *hw)
+{
+ struct cdns_torrent_refclk_driver *refclk_driver = to_cdns_torrent_refclk_driver(hw);
+ unsigned int val;
+
+ regmap_field_read(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_4], &val);
+ return clk_mux_val_to_index(hw, cdns_torrent_refclk_driver_mux_table, 0, val);
+}
+
+static int cdns_torrent_refclk_driver_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct cdns_torrent_refclk_driver *refclk_driver = to_cdns_torrent_refclk_driver(hw);
+ unsigned int val;
+
+ val = cdns_torrent_refclk_driver_mux_table[index];
+ return regmap_field_write(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_4], val);
+}
+
static const struct clk_ops cdns_torrent_refclk_driver_ops = {
.enable = cdns_torrent_refclk_driver_enable,
.disable = cdns_torrent_refclk_driver_disable,
.is_enabled = cdns_torrent_refclk_driver_is_enabled,
+ .set_parent = cdns_torrent_refclk_driver_set_parent,
+ .get_parent = cdns_torrent_refclk_driver_get_parent,
};
static int cdns_torrent_refclk_driver_register(struct cdns_torrent_phy *cdns_phy)
@@ -1752,7 +1872,8 @@ static int cdns_torrent_refclk_driver_register(struct cdns_torrent_phy *cdns_phy
struct device *dev = cdns_phy->dev;
struct regmap_field *field;
struct clk_init_data *init;
- const char *parent_name;
+ const char **parent_names;
+ unsigned int num_parents;
struct regmap *regmap;
char clk_name[100];
struct clk_hw *hw;
@@ -1762,12 +1883,19 @@ static int cdns_torrent_refclk_driver_register(struct cdns_torrent_phy *cdns_phy
if (!refclk_driver)
return -ENOMEM;
- hw = cdns_phy->clk_hw_data->hws[CDNS_TORRENT_DERIVED_REFCLK];
- if (IS_ERR_OR_NULL(hw)) {
- dev_err(dev, "No parent clock for refclk driver clock\n");
- return IS_ERR(hw) ? PTR_ERR(hw) : -ENOENT;
+ num_parents = ARRAY_SIZE(refclk_driver_parent_index);
+ parent_names = devm_kzalloc(dev, (sizeof(char *) * num_parents), GFP_KERNEL);
+ if (!parent_names)
+ return -ENOMEM;
+
+ for (i = 0; i < num_parents; i++) {
+ hw = cdns_phy->clk_hw_data->hws[refclk_driver_parent_index[i]];
+ if (IS_ERR_OR_NULL(hw)) {
+ dev_err(dev, "No parent clock for refclk driver clock\n");
+ return IS_ERR(hw) ? PTR_ERR(hw) : -ENOENT;
+ }
+ parent_names[i] = clk_hw_get_name(hw);
}
- parent_name = clk_hw_get_name(hw);
snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev),
clk_names[CDNS_TORRENT_REFCLK_DRIVER]);
@@ -1775,9 +1903,9 @@ static int cdns_torrent_refclk_driver_register(struct cdns_torrent_phy *cdns_phy
init = &refclk_driver->clk_data;
init->ops = &cdns_torrent_refclk_driver_ops;
- init->flags = 0;
- init->parent_names = &parent_name;
- init->num_parents = 1;
+ init->flags = CLK_SET_RATE_NO_REPARENT;
+ init->parent_names = parent_names;
+ init->num_parents = num_parents;
init->name = clk_name;
regmap = cdns_phy->regmap_common_cdb;
@@ -1791,6 +1919,9 @@ static int cdns_torrent_refclk_driver_register(struct cdns_torrent_phy *cdns_phy
refclk_driver->cmn_fields[i] = field;
}
+ /* Enable Derived reference clock as default */
+ regmap_field_write(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_4], 1);
+
refclk_driver->hw.init = init;
hw = &refclk_driver->hw;
@@ -2308,6 +2439,12 @@ static int cdns_torrent_clk_register(struct cdns_torrent_phy *cdns_phy)
return ret;
}
+ ret = cdns_torrent_received_refclk_register(cdns_phy);
+ if (ret) {
+ dev_err(dev, "failed to register received refclk\n");
+ return ret;
+ }
+
ret = cdns_torrent_refclk_driver_register(cdns_phy);
if (ret) {
dev_err(dev, "failed to register refclk driver\n");
--
2.26.1
