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Date: Wed, 15 Sep 2021 09:25:47 +0530
From: Kishon Vijay Abraham I <kishon@...com>
To: Swapnil Jakhade <sjakhade@...ence.com>, <vkoul@...nel.org>,
<robh+dt@...nel.org>, <linux-phy@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>
CC: <mparab@...ence.com>, <lokeshvutla@...com>, <a-govindraju@...com>
Subject: Re: [PATCH 3/5] phy: cadence-torrent: Add support for derived
reference clock output
Hi Swapnil,
On 08/09/21 11:56 pm, Swapnil Jakhade wrote:
> 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.
>
Will AM64 work after this patch? Since you are removing bunch of configurations
here, would it affect git bisectability?
Thanks
Kishon
> Signed-off-by: Swapnil Jakhade <sjakhade@...ence.com>
> ---
> 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)) {
>
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