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phy: cadence-torrent: Model reference clock driver as a clock to enable derived refclk

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When reference clock driver is enabled, either derived or received refclk
is output on cmn_refclk_p/m. Update the reference clock driver
implementation by modelling reference clock driver as a "clock" with
derived reference clock set as its default parent. The support for
received reference clock will be added in a separate patch.

Signed-off-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/20210922123735.21927-4-sjakhade@cadence.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Swapnil Jakhade 2021-09-22 14:37:34 +02:00 committed by Vinod Koul
parent f9aec1648d
commit 235bde4f44
1 changed files with 139 additions and 32 deletions
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171
drivers/phy/cadence/phy-cadence-torrent.c
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@ -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 =
@ -261,10 +262,12 @@ 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
static const struct reg_field cmn_cdiag_refclk_ovrd_4 =
REG_FIELD(CMN_CDIAG_REFCLK_OVRD, 4, 4);
#define REFCLK_OUT_NUM_CMN_CONFIG 4
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,
@ -272,7 +275,6 @@ enum cdns_torrent_refclk_out_cmn {
};
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),
@ -330,6 +332,8 @@ 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;
@ -345,10 +349,19 @@ enum phy_powerstate {
POWERSTATE_A3 = 3,
};
struct cdns_torrent_refclk_driver {
struct clk_hw hw;
struct regmap_field *cmn_fields[REFCLK_OUT_NUM_CMN_CONFIG];
struct clk_init_data clk_data;
};
#define to_cdns_torrent_refclk_driver(_hw) \
container_of(_hw, struct cdns_torrent_refclk_driver, hw)
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 +1631,7 @@ 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 +1642,7 @@ 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 +1650,7 @@ 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 +1665,19 @@ 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 +1696,8 @@ 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;
@ -1713,6 +1706,98 @@ 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_DERIVED_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);
return 0;
}
static void cdns_torrent_refclk_driver_disable(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_1], 1);
}
static int cdns_torrent_refclk_driver_is_enabled(struct clk_hw *hw)
{
struct cdns_torrent_refclk_driver *refclk_driver = to_cdns_torrent_refclk_driver(hw);
int val;
regmap_field_read(refclk_driver->cmn_fields[CMN_CDIAG_REFCLK_DRV0_CTRL_1], &val);
return !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,
};
static int cdns_torrent_refclk_driver_register(struct cdns_torrent_phy *cdns_phy)
{
struct cdns_torrent_refclk_driver *refclk_driver;
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;
int i, ret;
refclk_driver = devm_kzalloc(dev, sizeof(*refclk_driver), GFP_KERNEL);
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;
}
parent_name = clk_hw_get_name(hw);
snprintf(clk_name, sizeof(clk_name), "%s_%s", dev_name(dev),
clk_names[CDNS_TORRENT_REFCLK_DRIVER]);
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->name = clk_name;
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, "Refclk driver CMN reg field init failed\n");
return PTR_ERR(field);
}
refclk_driver->cmn_fields[i] = field;
}
refclk_driver->hw.init = init;
hw = &refclk_driver->hw;
ret = devm_clk_hw_register(dev, hw);
if (ret)
return ret;
cdns_phy->clk_hw_data->hws[CDNS_TORRENT_REFCLK_DRIVER] = hw;
return 0;
@ -1768,6 +1853,22 @@ 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)) {
@ -2207,6 +2308,12 @@ static int cdns_torrent_clk_register(struct cdns_torrent_phy *cdns_phy)
return ret;
}
ret = cdns_torrent_refclk_driver_register(cdns_phy);
if (ret) {
dev_err(dev, "failed to register refclk driver\n");
return ret;
}
ret = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, data);
if (ret) {
dev_err(dev, "Failed to add clock provider: %s\n", node->name);