Re: [PATCH v2 3/6] phy: amlogic: Add Amlogic A1 USB2 PHY Driver
From: Hanjie Lin <hidden>
Date: 2019-12-19 09:47:58
Also in:
linux-amlogic, linux-devicetree, linux-usb
On 2019/12/18 21:17, Neil Armstrong wrote:
Hi, On 18/12/2019 03:42, Hanjie Lin wrote:quoted
This adds support for the USB2 PHY found in the Amlogic A1 SoC Family. It supports host mode only. Signed-off-by: Hanjie Lin <redacted> Signed-off-by: Yue Wang <yue.wang@amlogic.com> --- drivers/phy/amlogic/phy-meson-g12a-usb2.c | 102 ++++++++++++++++++++++-------- 1 file changed, 74 insertions(+), 28 deletions(-)diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb2.c b/drivers/phy/amlogic/phy-meson-g12a-usb2.c index 9065ffc..2c242d3 100644 --- a/drivers/phy/amlogic/phy-meson-g12a-usb2.c +++ b/drivers/phy/amlogic/phy-meson-g12a-usb2.c@@ -146,11 +146,18 @@ #define RESET_COMPLETE_TIME 1000 #define PLL_RESET_COMPLETE_TIME 100 +enum { + MESON_USB2_PHY_VERSION_10 = 0, + MESON_USB2_PHY_VERSION_11,Are these the real "versions" of the phy or it's made up ?
This version is made up and only for distinguish a1 and g12a.
quoted
+ MESON_USB2_PHY_VERSION_COUNT, +}; + struct phy_meson_g12a_usb2_priv { struct device *dev; struct regmap *regmap; struct clk *clk; struct reset_control *reset; + int phy_version; }; static const struct regmap_config phy_meson_g12a_usb2_regmap_conf = {@@ -192,18 +199,33 @@ static int phy_meson_g12a_usb2_init(struct phy *phy) FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT2, 2) | FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT1, 9)); - regmap_write(priv->regmap, PHY_CTRL_R18, - FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) | - FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) | - FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) | - FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) | - FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) | - FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) | - FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) | - FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) | - FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) | - FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) | - PHY_CTRL_R18_MPLL_ACG_RANGE); + if (priv->phy_version == MESON_USB2_PHY_VERSION_10) + regmap_write(priv->regmap, PHY_CTRL_R18, + FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) | + FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) | + FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) | + FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) | + FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) | + FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) | + FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) | + FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) | + FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) | + FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) | + PHY_CTRL_R18_MPLL_ACG_RANGE); + else if (priv->phy_version == MESON_USB2_PHY_VERSION_11) + regmap_write(priv->regmap, PHY_CTRL_R18, + FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) | + FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) | + FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) | + FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) | + FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) | + FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) | + FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) | + FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) | + FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) | + FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) | + PHY_CTRL_R18_MPLL_ACG_RANGE | + PHY_CTRL_R18_MPLL_DCO_CLK_SEL);The only difference is PHY_CTRL_R18_MPLL_ACG_RANGE | PHY_CTRL_R18_MPLL_DCO_CLK_SEL, you can easily simplify the code here by using a temp variable.
Yes, it will looks more clearly.
quoted
udelay(PLL_RESET_COMPLETE_TIME);@@ -227,13 +249,24 @@ static int phy_meson_g12a_usb2_init(struct phy *phy) FIELD_PREP(PHY_CTRL_R20_USB2_BGR_VREF_4_0, 0) | FIELD_PREP(PHY_CTRL_R20_USB2_BGR_DBG_1_0, 0)); - regmap_write(priv->regmap, PHY_CTRL_R4, - FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) | - FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) | - FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) | - PHY_CTRL_R4_TEST_BYPASS_MODE_EN | - FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) | - FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0)); + if (priv->phy_version == MESON_USB2_PHY_VERSION_10) + regmap_write(priv->regmap, PHY_CTRL_R4, + FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) | + FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) | + FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) | + PHY_CTRL_R4_TEST_BYPASS_MODE_EN | + FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) | + FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0)); + else if (priv->phy_version == MESON_USB2_PHY_VERSION_11) { + regmap_write(priv->regmap, PHY_CTRL_R21, + PHY_CTRL_R21_USB2_CAL_ACK_EN | + PHY_CTRL_R21_USB2_TX_STRG_PD | + FIELD_PREP(PHY_CTRL_R21_USB2_OTG_ACA_TRIM_1_0, 2)); + + /* Analog Settings */ + regmap_write(priv->regmap, PHY_CTRL_R13, + FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7)); + } /* Tuning Disconnect Threshold */ regmap_write(priv->regmap, PHY_CTRL_R3,@@ -241,11 +274,13 @@ static int phy_meson_g12a_usb2_init(struct phy *phy) FIELD_PREP(PHY_CTRL_R3_HSDIC_REF, 1) | FIELD_PREP(PHY_CTRL_R3_DISC_THRESH, 3)); - /* Analog Settings */ - regmap_write(priv->regmap, PHY_CTRL_R14, 0); - regmap_write(priv->regmap, PHY_CTRL_R13, - PHY_CTRL_R13_UPDATE_PMA_SIGNALS | - FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7)); + if (priv->phy_version == MESON_USB2_PHY_VERSION_10) { + /* Analog Settings */ + regmap_write(priv->regmap, PHY_CTRL_R14, 0); + regmap_write(priv->regmap, PHY_CTRL_R13, + PHY_CTRL_R13_UPDATE_PMA_SIGNALS | + FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7)); + } return 0; }@@ -271,6 +306,7 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev) struct resource *res; struct phy_meson_g12a_usb2_priv *priv; struct phy *phy; + struct device_node *np = dev->of_node; void __iomem *base; int ret;@@ -286,14 +322,23 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); + if (of_device_is_compatible(np, "amlogic,g12a-usb2-phy")) + priv->phy_version = MESON_USB2_PHY_VERSION_10; + else if (of_device_is_compatible(np, "amlogic,a1-usb2-phy")) + priv->phy_version = MESON_USB2_PHY_VERSION_11; + else + return -EINVAL;Please use of_device_get_match_data() and a match data for each compatible instead.
OK, I will fix it in next version.
quoted
+ priv->regmap = devm_regmap_init_mmio(dev, base, &phy_meson_g12a_usb2_regmap_conf); if (IS_ERR(priv->regmap)) return PTR_ERR(priv->regmap); - priv->clk = devm_clk_get(dev, "xtal"); - if (IS_ERR(priv->clk)) - return PTR_ERR(priv->clk); + if (priv->phy_version == MESON_USB2_PHY_VERSION_10) { + priv->clk = devm_clk_get(dev, "xtal"); + if (IS_ERR(priv->clk)) + return PTR_ERR(priv->clk); + } priv->reset = devm_reset_control_get(dev, "phy"); if (IS_ERR(priv->reset))@@ -322,7 +367,8 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev) static const struct of_device_id phy_meson_g12a_usb2_of_match[] = { { .compatible = "amlogic,g12a-usb2-phy", }, - { }, + { .compatible = "amlogic,a1-usb2-phy", }, + { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, phy_meson_g12a_usb2_of_match);Thanks, Neil .
Thanks, Hanjie.Lin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel