[PATCH v4 0/2] phy: spacemit: Add USB2 PHY support for K3 SoC

[PATCH v4 0/2] phy: spacemit: Add USB2 PHY support for K3 SoC

[Yixun Lan]

The series trys to add USB2 PHY support for SpacemiT K3 SoC, while 
patch [1/2] implement a disconnect function which is needed during
next connection.

No DTS part has been inclueded in this series, instead I plan to
submit them later while adding USB host support.

I've collected all patches and pushed a complete review branch here[1],
for people who interested to test easily, which include DTS and necessary
changes, other patches may still need to improve, but sufficient for
verifying the functionality.

Link: https://github.com/spacemit-com/linux/tree/WIP/k3/usb2 [1]

To: Vinod Koul <vkoul@kernel.org>
To: Neil Armstrong <neil.armstrong@linaro.org>
To: Rob Herring <robh@kernel.org>
To: Krzysztof Kozlowski <krzk+dt@kernel.org>
To: Conor Dooley <conor+dt@kernel.org>
To: Ze Huang <huang.ze@linux.dev>
Cc: Junzhong Pan <panjunzhong@linux.spacemit.com>
Cc: linux-phy@lists.infradead.org
Cc: devicetree@vger.kernel.org
Cc: linux-riscv@lists.infradead.org
Cc: spacemit@lists.linux.dev
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Yixun Lan <dlan@kernel.org>

Changes in v4:
- rebase to v7.0-rc1
- fix preceding open parenthesis
- drop patch 1 which already merged
- publish a test branch
- Link to v3: https://lore.kernel.org/r/20260216152653.25244-1-dlan@kernel.org

Change in v3:
 - split from v2 as bug fix
 - fix alignment to open parenthesis
 - http://lore.kernel.org/r/20260216090112.n5jjpui3luqsybb5@skbuf
 - Link to v2: https://lore.kernel.org/r/20260214-11-k3-usb2-phy-v2-0-6ed31e031ab4@kernel.org

Changes in v2:
- collect ACK
- add Fixes tag
- implement separate phy_ops
- Link to v1: https://lore.kernel.org/r/20260212-11-k3-usb2-phy-v1-0-43578592405d@kernel.org

---
Yixun Lan (2):
      dt-bindings: phy: spacemit: k3: add USB2 PHY support
      phy: k1-usb: k3: add USB2 PHY support

 .../devicetree/bindings/phy/spacemit,usb2-phy.yaml |  6 ++--
 drivers/phy/spacemit/phy-k1-usb2.c                 | 34 ++++++++++++++++++----
 2 files changed, 33 insertions(+), 7 deletions(-)
---
base-commit: d2625d793eefe7dff154361ec66fed7886781d73
change-id: 20260124-11-k3-usb2-phy-c4630b990b1f

Best regards,
-- 
Yixun Lan <dlan@kernel.org>

[PATCH v4 1/2] dt-bindings: phy: spacemit: k3: add USB2 PHY support

[Yixun Lan]

Introduce a compatible string for the USB2 PHY in SpacemiT K3 SoC. The IP
of USB2 PHY mostly shares the same functionalities with K1 SoC, while has
some register layout changes.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Yixun Lan <dlan@kernel.org>
---
 Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml b/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml
index 43eaca90d88c..18025e5f60d6 100644
--- a/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/spacemit,usb2-phy.yaml
@@ -4,14 +4,16 @@
 $id: http://devicetree.org/schemas/phy/spacemit,usb2-phy.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: SpacemiT K1 SoC USB 2.0 PHY
+title: SpacemiT K1/K3 SoC USB 2.0 PHY
 
 maintainers:
   - Ze Huang <huang.ze@linux.dev>
 
 properties:
   compatible:
-    const: spacemit,k1-usb2-phy
+    enum:
+      - spacemit,k1-usb2-phy
+      - spacemit,k3-usb2-phy
 
   reg:
     maxItems: 1

-- 
2.53.0

[PATCH v4 2/2] phy: k1-usb: k3: add USB2 PHY support

[Yixun Lan]

Add USB2 PHY support for SpacemiT K3 SoC.

Register layout of handling USB disconnect operation has been changed,
So introducing a platform data to distinguish the different SoCs.

Reviewed-by: Yao Zi <me@ziyao.cc>
Signed-off-by: Yixun Lan <dlan@kernel.org>
---
 drivers/phy/spacemit/phy-k1-usb2.c | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

diff --git a/drivers/phy/spacemit/phy-k1-usb2.c b/drivers/phy/spacemit/phy-k1-usb2.c
index 9215d0b223b2..87b943d9111f 100644
--- a/drivers/phy/spacemit/phy-k1-usb2.c
+++ b/drivers/phy/spacemit/phy-k1-usb2.c
@@ -51,6 +51,9 @@
 #define PHY_K1_HS_HOST_DISC		0x40
 #define  PHY_K1_HS_HOST_DISC_CLR		BIT(0)
 
+#define PHY_K3_HS_HOST_DISC		0x20
+#define  PHY_K3_HS_HOST_DISC_CLR		BIT(8)
+
 #define PHY_PLL_DIV_CFG			0x98
 #define  PHY_FDIV_FRACT_8_15		GENMASK(7, 0)
 #define  PHY_FDIV_FRACT_16_19		GENMASK(11, 8)
@@ -145,7 +148,7 @@ static int spacemit_usb2phy_exit(struct phy *phy)
 	return 0;
 }
 
-static int spacemit_usb2phy_disconnect(struct phy *phy, int port)
+static int spacemit_k1_usb2phy_disconnect(struct phy *phy, int port)
 {
 	struct spacemit_usb2phy *sphy = phy_get_drvdata(phy);
 
@@ -155,10 +158,27 @@ static int spacemit_usb2phy_disconnect(struct phy *phy, int port)
 	return 0;
 }
 
-static const struct phy_ops spacemit_usb2phy_ops = {
+static int spacemit_k3_usb2phy_disconnect(struct phy *phy, int port)
+{
+	struct spacemit_usb2phy *sphy = phy_get_drvdata(phy);
+
+	regmap_update_bits(sphy->regmap_base, PHY_K3_HS_HOST_DISC,
+			   PHY_K3_HS_HOST_DISC_CLR, PHY_K3_HS_HOST_DISC_CLR);
+
+	return 0;
+}
+
+static const struct phy_ops spacemit_k1_usb2phy_ops = {
 	.init = spacemit_usb2phy_init,
 	.exit = spacemit_usb2phy_exit,
-	.disconnect = spacemit_usb2phy_disconnect,
+	.disconnect = spacemit_k1_usb2phy_disconnect,
+	.owner = THIS_MODULE,
+};
+
+static const struct phy_ops spacemit_k3_usb2phy_ops = {
+	.init = spacemit_usb2phy_init,
+	.exit = spacemit_usb2phy_exit,
+	.disconnect = spacemit_k3_usb2phy_disconnect,
 	.owner = THIS_MODULE,
 };
 
@@ -167,12 +187,15 @@ static int spacemit_usb2phy_probe(struct platform_device *pdev)
 	struct phy_provider *phy_provider;
 	struct device *dev = &pdev->dev;
 	struct spacemit_usb2phy *sphy;
+	const struct phy_ops *ops;
 	void __iomem *base;
 
 	sphy = devm_kzalloc(dev, sizeof(*sphy), GFP_KERNEL);
 	if (!sphy)
 		return -ENOMEM;
 
+	ops = device_get_match_data(dev);
+
 	sphy->clk = devm_clk_get_prepared(&pdev->dev, NULL);
 	if (IS_ERR(sphy->clk))
 		return dev_err_probe(dev, PTR_ERR(sphy->clk), "Failed to get clock\n");
@@ -185,7 +208,7 @@ static int spacemit_usb2phy_probe(struct platform_device *pdev)
 	if (IS_ERR(sphy->regmap_base))
 		return dev_err_probe(dev, PTR_ERR(sphy->regmap_base), "Failed to init regmap\n");
 
-	sphy->phy = devm_phy_create(dev, NULL, &spacemit_usb2phy_ops);
+	sphy->phy = devm_phy_create(dev, NULL, ops);
 	if (IS_ERR(sphy->phy))
 		return dev_err_probe(dev, PTR_ERR(sphy->phy), "Failed to create phy\n");
 
@@ -196,7 +219,8 @@ static int spacemit_usb2phy_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id spacemit_usb2phy_dt_match[] = {
-	{ .compatible = "spacemit,k1-usb2-phy", },
+	{ .compatible = "spacemit,k1-usb2-phy", .data = &spacemit_k1_usb2phy_ops },
+	{ .compatible = "spacemit,k3-usb2-phy", .data = &spacemit_k3_usb2phy_ops },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, spacemit_usb2phy_dt_match);

-- 
2.53.0

Re: [PATCH v4 0/2] phy: spacemit: Add USB2 PHY support for K3 SoC

[Yixun Lan]

Hi Vinod Koul,

On 01:00 Thu 05 Mar     , Yixun Lan wrote:
> The series trys to add USB2 PHY support for SpacemiT K3 SoC, while 
> patch [1/2] implement a disconnect function which is needed during
> next connection.
> 
> No DTS part has been inclueded in this series, instead I plan to
> submit them later while adding USB host support.
> 
> I've collected all patches and pushed a complete review branch here[1],
> for people who interested to test easily, which include DTS and necessary
> changes, other patches may still need to improve, but sufficient for
> verifying the functionality.
> 
> Link: https://github.com/spacemit-com/linux/tree/WIP/k3/usb2 [1]
> 

Just want to ping this, Can you queue it for v7.1? Thanks

-- 
Yixun Lan (dlan)