diff mbox series

[v2,2/2] phy: rockchip: inno-usb2: Add usb2 phys support for rk3576

Message ID 20240924085510.20863-2-frawang.cn@gmail.com (mailing list archive)
State New
Headers show
Series [v2,1/2] dt-bindings: phy: rockchip,inno-usb2phy: add rk3576 | expand

Commit Message

Frank Wang Sept. 24, 2024, 8:55 a.m. UTC 
From: William Wu <william.wu@rock-chips.com>

The RK3576 SoC has two independent USB2.0 PHYs, and
each PHY has one port.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
---
Changelog:
v2:
 - no changes.

v1:
 - https://patchwork.kernel.org/project/linux-phy/patch/20240923025326.10467-2-frank.wang@rock-chips.com/

 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 131 ++++++++++++++++--
 1 file changed, 123 insertions(+), 8 deletions(-)

Comments

Heiko Stuebner Sept. 24, 2024, 10:01 a.m. UTC | #1 
Am Dienstag, 24. September 2024, 10:55:10 CEST schrieb Frank Wang:
> From: William Wu <william.wu@rock-chips.com>
> 
> The RK3576 SoC has two independent USB2.0 PHYs, and
> each PHY has one port.

Can you please split the content into "converting to clk_bulk" (see
additional comment below) and "add rk3576" please?

That would make the patch a lot cleaner.


> @@ -376,6 +378,7 @@ rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy)
>  {
>  	struct device_node *node = rphy->dev->of_node;
>  	struct clk_init_data init;
> +	struct clk *refclk = of_clk_get_by_name(node, "phyclk");

Doesn't this create an imbalance - with the missing put?
I think ideally just define clk_bulk_data structs for the
1-clock and 3-clock variant, attach that to the device-data
and then use the regular devm_clk_bulk_get ?

That way you can then retrieve the clock from that struct?


Thanks
Heiko
Frank Wang Sept. 25, 2024, 1:42 a.m. UTC | #2 
Hi Heiko,

On 2024/9/24 18:01, Heiko Stuebner wrote:
> Am Dienstag, 24. September 2024, 10:55:10 CEST schrieb Frank Wang:
>> From: William Wu <william.wu@rock-chips.com>
>>
>> The RK3576 SoC has two independent USB2.0 PHYs, and
>> each PHY has one port.
> Can you please split the content into "converting to clk_bulk" (see
> additional comment below) and "add rk3576" please?
>
> That would make the patch a lot cleaner.

OK, I shall amend in the next patch.

>
>> @@ -376,6 +378,7 @@ rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy)
>>   {
>>   	struct device_node *node = rphy->dev->of_node;
>>   	struct clk_init_data init;
>> +	struct clk *refclk = of_clk_get_by_name(node, "phyclk");
> Doesn't this create an imbalance - with the missing put?
> I think ideally just define clk_bulk_data structs for the
> 1-clock and 3-clock variant, attach that to the device-data
> and then use the regular devm_clk_bulk_get ?
>
> That way you can then retrieve the clock from that struct?

How about keep the clk_bulk_data and num_clks member in rockchip_usb2phy 
structs, and retrieve the clock by "clks.id" here?
Just like the following codes.

@@ -378,8 +378,9 @@ rockchip_usb2phy_clk480m_register(struct 
rockchip_usb2phy *rphy)
  {
         struct device_node *node = rphy->dev->of_node;
         struct clk_init_data init;
-       struct clk *refclk = of_clk_get_by_name(node, "phyclk");
+       struct clk *refclk = NULL;
         const char *clk_name;
+       int i;
         int ret = 0;

         init.flags = 0;
@@ -389,6 +390,13 @@ rockchip_usb2phy_clk480m_register(struct 
rockchip_usb2phy *rphy)
         /* optional override of the clockname */
         of_property_read_string(node, "clock-output-names", &init.name);

+       for (i = 0; i < rphy->num_clks; i++) {
+               if (!strncmp(rphy->clks[i].id, "phyclk", 6)) {
+                       refclk = rphy->clks[i].clk;
+                       break;
+               }
+       }
+

BR.
Frank

>
> Thanks
> Heiko
>
Heiko Stuebner Sept. 25, 2024, 6:59 a.m. UTC | #3 
Hi Frank,

Am Mittwoch, 25. September 2024, 03:42:35 CEST schrieb frawang:
> >> @@ -376,6 +378,7 @@ rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy)
> >>   {
> >>   	struct device_node *node = rphy->dev->of_node;
> >>   	struct clk_init_data init;
> >> +	struct clk *refclk = of_clk_get_by_name(node, "phyclk");
> > Doesn't this create an imbalance - with the missing put?
> > I think ideally just define clk_bulk_data structs for the
> > 1-clock and 3-clock variant, attach that to the device-data
> > and then use the regular devm_clk_bulk_get ?
> >
> > That way you can then retrieve the clock from that struct?
> 
> How about keep the clk_bulk_data and num_clks member in rockchip_usb2phy 
> structs, and retrieve the clock by "clks.id" here?
> Just like the following codes.
> 
> @@ -378,8 +378,9 @@ rockchip_usb2phy_clk480m_register(struct 
> rockchip_usb2phy *rphy)
>   {
>          struct device_node *node = rphy->dev->of_node;
>          struct clk_init_data init;
> -       struct clk *refclk = of_clk_get_by_name(node, "phyclk");
> +       struct clk *refclk = NULL;
>          const char *clk_name;
> +       int i;
>          int ret = 0;
> 
>          init.flags = 0;
> @@ -389,6 +390,13 @@ rockchip_usb2phy_clk480m_register(struct 
> rockchip_usb2phy *rphy)
>          /* optional override of the clockname */
>          of_property_read_string(node, "clock-output-names", &init.name);
> 
> +       for (i = 0; i < rphy->num_clks; i++) {
> +               if (!strncmp(rphy->clks[i].id, "phyclk", 6)) {
> +                       refclk = rphy->clks[i].clk;
> +                       break;
> +               }
> +       }
> +

this is exactly what I had in mind :-)

Thanks
Heiko
diff mbox series

Patch

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 4f71373ae6e1a..51ca16cbb86cb 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -229,9 +229,10 @@  struct rockchip_usb2phy_port {
  * @dev: pointer to device.
  * @grf: General Register Files regmap.
  * @usbgrf: USB General Register Files regmap.
- * @clk: clock struct of phy input clk.
+ * @clks: array of phy input clocks.
  * @clk480m: clock struct of phy output clk.
  * @clk480m_hw: clock struct of phy output clk management.
+ * @num_clks: number of phy input clocks.
  * @phy_reset: phy reset control.
  * @chg_state: states involved in USB charger detection.
  * @chg_type: USB charger types.
@@ -246,9 +247,10 @@  struct rockchip_usb2phy {
 	struct device	*dev;
 	struct regmap	*grf;
 	struct regmap	*usbgrf;
-	struct clk	*clk;
+	struct clk_bulk_data	*clks;
 	struct clk	*clk480m;
 	struct clk_hw	clk480m_hw;
+	int			num_clks;
 	struct reset_control	*phy_reset;
 	enum usb_chg_state	chg_state;
 	enum power_supply_type	chg_type;
@@ -376,6 +378,7 @@  rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy)
 {
 	struct device_node *node = rphy->dev->of_node;
 	struct clk_init_data init;
+	struct clk *refclk = of_clk_get_by_name(node, "phyclk");
 	const char *clk_name;
 	int ret = 0;
 
@@ -386,8 +389,8 @@  rockchip_usb2phy_clk480m_register(struct rockchip_usb2phy *rphy)
 	/* optional override of the clockname */
 	of_property_read_string(node, "clock-output-names", &init.name);
 
-	if (rphy->clk) {
-		clk_name = __clk_get_name(rphy->clk);
+	if (!IS_ERR(refclk)) {
+		clk_name = __clk_get_name(refclk);
 		init.parent_names = &clk_name;
 		init.num_parents = 1;
 	} else {
@@ -1406,22 +1409,29 @@  static int rockchip_usb2phy_probe(struct platform_device *pdev)
 	if (IS_ERR(rphy->phy_reset))
 		return PTR_ERR(rphy->phy_reset);
 
-	rphy->clk = devm_clk_get_optional_enabled(dev, "phyclk");
-	if (IS_ERR(rphy->clk)) {
-		return dev_err_probe(&pdev->dev, PTR_ERR(rphy->clk),
+	ret = devm_clk_bulk_get_all(dev, &rphy->clks);
+	if (ret == -EPROBE_DEFER) {
+		return dev_err_probe(&pdev->dev, -EPROBE_DEFER,
 				     "failed to get phyclk\n");
 	}
 
+	/* Clocks are optional */
+	rphy->num_clks = ret < 0 ? 0 : ret;
+
 	ret = rockchip_usb2phy_clk480m_register(rphy);
 	if (ret) {
 		dev_err(dev, "failed to register 480m output clock\n");
 		return ret;
 	}
 
+	ret = clk_bulk_prepare_enable(rphy->num_clks, rphy->clks);
+	if (ret)
+		return ret;
+
 	if (rphy->phy_cfg->phy_tuning) {
 		ret = rphy->phy_cfg->phy_tuning(rphy);
 		if (ret)
-			return ret;
+			goto disable_clks;
 	}
 
 	index = 0;
@@ -1484,6 +1494,8 @@  static int rockchip_usb2phy_probe(struct platform_device *pdev)
 
 put_child:
 	of_node_put(child_np);
+disable_clks:
+	clk_bulk_disable_unprepare(rphy->num_clks, rphy->clks);
 	return ret;
 }
 
@@ -1495,6 +1507,30 @@  static int rk3128_usb2phy_tuning(struct rockchip_usb2phy *rphy)
 				BIT(2) << BIT_WRITEABLE_SHIFT | 0);
 }
 
+static int rk3576_usb2phy_tuning(struct rockchip_usb2phy *rphy)
+{
+	int ret;
+	u32 reg = rphy->phy_cfg->reg;
+
+	/* Deassert SIDDQ to power on analog block */
+	ret = regmap_write(rphy->grf, reg + 0x0010, GENMASK(29, 29) | 0x0000);
+	if (ret)
+		return ret;
+
+	/* Do reset after exit IDDQ mode */
+	ret = rockchip_usb2phy_reset(rphy);
+	if (ret)
+		return ret;
+
+	/* HS DC Voltage Level Adjustment 4'b1001 : +5.89% */
+	ret |= regmap_write(rphy->grf, reg + 0x000c, GENMASK(27, 24) | 0x0900);
+
+	/* HS Transmitter Pre-Emphasis Current Control 2'b10 : 2x */
+	ret |= regmap_write(rphy->grf, reg + 0x0010, GENMASK(20, 19) | 0x0010);
+
+	return ret;
+}
+
 static int rk3588_usb2phy_tuning(struct rockchip_usb2phy *rphy)
 {
 	int ret;
@@ -1923,6 +1959,84 @@  static const struct rockchip_usb2phy_cfg rk3568_phy_cfgs[] = {
 	{ /* sentinel */ }
 };
 
+static const struct rockchip_usb2phy_cfg rk3576_phy_cfgs[] = {
+	{
+		.reg = 0x0,
+		.num_ports	= 1,
+		.phy_tuning	= rk3576_usb2phy_tuning,
+		.clkout_ctl	= { 0x0008, 0, 0, 1, 0 },
+		.port_cfgs	= {
+			[USB2PHY_PORT_OTG] = {
+				.phy_sus	= { 0x0000, 8, 0, 0, 0x1d1 },
+				.bvalid_det_en	= { 0x00c0, 1, 1, 0, 1 },
+				.bvalid_det_st	= { 0x00c4, 1, 1, 0, 1 },
+				.bvalid_det_clr = { 0x00c8, 1, 1, 0, 1 },
+				.ls_det_en	= { 0x00c0, 0, 0, 0, 1 },
+				.ls_det_st	= { 0x00c4, 0, 0, 0, 1 },
+				.ls_det_clr	= { 0x00c8, 0, 0, 0, 1 },
+				.disfall_en	= { 0x00c0, 6, 6, 0, 1 },
+				.disfall_st	= { 0x00c4, 6, 6, 0, 1 },
+				.disfall_clr	= { 0x00c8, 6, 6, 0, 1 },
+				.disrise_en	= { 0x00c0, 5, 5, 0, 1 },
+				.disrise_st	= { 0x00c4, 5, 5, 0, 1 },
+				.disrise_clr	= { 0x00c8, 5, 5, 0, 1 },
+				.utmi_avalid	= { 0x0080, 1, 1, 0, 1 },
+				.utmi_bvalid	= { 0x0080, 0, 0, 0, 1 },
+				.utmi_ls	= { 0x0080, 5, 4, 0, 1 },
+			}
+		},
+		.chg_det = {
+			.cp_det		= { 0x0080, 8, 8, 0, 1 },
+			.dcp_det	= { 0x0080, 8, 8, 0, 1 },
+			.dp_det		= { 0x0080, 9, 9, 1, 0 },
+			.idm_sink_en	= { 0x0010, 5, 5, 1, 0 },
+			.idp_sink_en	= { 0x0010, 5, 5, 0, 1 },
+			.idp_src_en	= { 0x0010, 14, 14, 0, 1 },
+			.rdm_pdwn_en	= { 0x0010, 14, 14, 0, 1 },
+			.vdm_src_en	= { 0x0010, 7, 6, 0, 3 },
+			.vdp_src_en	= { 0x0010, 7, 6, 0, 3 },
+		},
+	},
+	{
+		.reg = 0x2000,
+		.num_ports	= 1,
+		.phy_tuning	= rk3576_usb2phy_tuning,
+		.clkout_ctl	= { 0x2008, 0, 0, 1, 0 },
+		.port_cfgs	= {
+			[USB2PHY_PORT_OTG] = {
+				.phy_sus	= { 0x2000, 8, 0, 0, 0x1d1 },
+				.bvalid_det_en	= { 0x20c0, 1, 1, 0, 1 },
+				.bvalid_det_st	= { 0x20c4, 1, 1, 0, 1 },
+				.bvalid_det_clr = { 0x20c8, 1, 1, 0, 1 },
+				.ls_det_en	= { 0x20c0, 0, 0, 0, 1 },
+				.ls_det_st	= { 0x20c4, 0, 0, 0, 1 },
+				.ls_det_clr	= { 0x20c8, 0, 0, 0, 1 },
+				.disfall_en	= { 0x20c0, 6, 6, 0, 1 },
+				.disfall_st	= { 0x20c4, 6, 6, 0, 1 },
+				.disfall_clr	= { 0x20c8, 6, 6, 0, 1 },
+				.disrise_en	= { 0x20c0, 5, 5, 0, 1 },
+				.disrise_st	= { 0x20c4, 5, 5, 0, 1 },
+				.disrise_clr	= { 0x20c8, 5, 5, 0, 1 },
+				.utmi_avalid	= { 0x2080, 1, 1, 0, 1 },
+				.utmi_bvalid	= { 0x2080, 0, 0, 0, 1 },
+				.utmi_ls	= { 0x2080, 5, 4, 0, 1 },
+			}
+		},
+		.chg_det = {
+			.cp_det		= { 0x2080, 8, 8, 0, 1 },
+			.dcp_det	= { 0x2080, 8, 8, 0, 1 },
+			.dp_det		= { 0x2080, 9, 9, 1, 0 },
+			.idm_sink_en	= { 0x2010, 5, 5, 1, 0 },
+			.idp_sink_en	= { 0x2010, 5, 5, 0, 1 },
+			.idp_src_en	= { 0x2010, 14, 14, 0, 1 },
+			.rdm_pdwn_en	= { 0x2010, 14, 14, 0, 1 },
+			.vdm_src_en	= { 0x2010, 7, 6, 0, 3 },
+			.vdp_src_en	= { 0x2010, 7, 6, 0, 3 },
+		},
+	},
+	{ /* sentinel */ }
+};
+
 static const struct rockchip_usb2phy_cfg rk3588_phy_cfgs[] = {
 	{
 		.reg = 0x0000,
@@ -2094,6 +2208,7 @@  static const struct of_device_id rockchip_usb2phy_dt_match[] = {
 	{ .compatible = "rockchip,rk3366-usb2phy", .data = &rk3366_phy_cfgs },
 	{ .compatible = "rockchip,rk3399-usb2phy", .data = &rk3399_phy_cfgs },
 	{ .compatible = "rockchip,rk3568-usb2phy", .data = &rk3568_phy_cfgs },
+	{ .compatible = "rockchip,rk3576-usb2phy", .data = &rk3576_phy_cfgs },
 	{ .compatible = "rockchip,rk3588-usb2phy", .data = &rk3588_phy_cfgs },
 	{ .compatible = "rockchip,rv1108-usb2phy", .data = &rv1108_phy_cfgs },
 	{}