[PATCH v2 2/3] usb: dwc3: dwc3-generic-plat: add layerscape dwc3 support
From: Frank Li <Frank.Li@nxp.com>
Date: 2025-09-23 20:23:12
Also in:
linux-devicetree, linux-usb, lkml
Subsystem:
designware usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Thinh Nguyen, Linus Torvalds, Greg Kroah-Hartman
Add layerscape dwc3 support by using flatten dwc3 core library. Layerscape dwc3 need set software managed property snps,gsbuscfg0-reqinfo as 0x2222 when dma-coherence set. Signed-off-by: Frank Li <Frank.Li@nxp.com> --- drivers/usb/dwc3/dwc3-generic-plat.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/dwc3/dwc3-generic-plat.c b/drivers/usb/dwc3/dwc3-generic-plat.c
index d96b20570002dc619ea813f4d6a8013636a0f346..d886b6e557b12edda71203e4f640a9a0a53b4f35 100644
--- a/drivers/usb/dwc3/dwc3-generic-plat.c
+++ b/drivers/usb/dwc3/dwc3-generic-plat.c@@ -8,10 +8,15 @@ */ #include <linux/clk.h> +#include <linux/of_address.h> #include <linux/platform_device.h> #include <linux/reset.h> #include "glue.h" +struct dwc3_generic_drvdata { + u32 gsbuscfg0; +}; + struct dwc3_generic { struct device *dev; struct dwc3 dwc;
@@ -29,6 +34,7 @@ static void dwc3_generic_reset_control_assert(void *data) static int dwc3_generic_probe(struct platform_device *pdev) { + const struct dwc3_generic_drvdata *drvdata; struct dwc3_probe_data probe_data = {}; struct device *dev = &pdev->dev; struct dwc3_generic *dwc3g;
@@ -41,6 +47,8 @@ static int dwc3_generic_probe(struct platform_device *pdev) dwc3g->dev = dev; + drvdata = of_device_get_match_data(dev); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { dev_err(&pdev->dev, "missing memory resource\n");
@@ -70,6 +78,17 @@ static int dwc3_generic_probe(struct platform_device *pdev) if (ret < 0) return dev_err_probe(dev, ret, "failed to get clocks\n"); + if (of_dma_is_coherent(pdev->dev.of_node)) { + struct property_entry props[2] = {}; + + props[0] = PROPERTY_ENTRY_U16("snps,gsbuscfg0-reqinfo", drvdata->gsbuscfg0); + + ret = device_create_managed_software_node(dev, props, NULL); + if (ret) + return dev_err_probe(dev, ret, + "fail create software managed property node\n"); + } + dwc3g->num_clocks = ret; dwc3g->dwc.dev = dev; probe_data.dwc = &dwc3g->dwc;
@@ -145,8 +164,17 @@ static const struct dev_pm_ops dwc3_generic_dev_pm_ops = { dwc3_generic_runtime_idle) }; +static const struct dwc3_generic_drvdata spacemit_k1_dwc3 = { + .gsbuscfg0 = DWC3_GSBUSCFG0_REQINFO_UNSPECIFIED, +}; + +static const struct dwc3_generic_drvdata fsl_ls1028_dwc3 = { + .gsbuscfg0 = 0x2222, +}; + static const struct of_device_id dwc3_generic_of_match[] = { - { .compatible = "spacemit,k1-dwc3", }, + { .compatible = "spacemit,k1-dwc3", &spacemit_k1_dwc3}, + { .compatible = "fsl,ls1028a-dwc3", &fsl_ls1028_dwc3}, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, dwc3_generic_of_match);
--
2.34.1