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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Model the received reference clock as a next step to support reference clock driver. 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 --- drivers/phy/cadence/phy-cadence-torrent.c | 102 +++++++++++++++++++++- 1 file changed, 101 insertions(+), 1 deletion(-) diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c index 6dceb12e88c4..2c42a6690632 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 = @@ -343,6 +344,16 @@ 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; @@ -1686,6 +1697,89 @@ 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 struct regmap *cdns_regmap_init(struct device *dev, void __iomem *base, u32 block_offset, u8 reg_offset_shift, @@ -2191,6 +2285,12 @@ 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 = 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); -- 2.26.1 -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy