The RTK DHC SoCs were designed, the global register address offset at 0x8100. The default address offset is constant at DWC3_GLOBALS_REGS_START (0xc100). Therefore, add the compatible name of device-tree to specify the SoC custom's global register start address. Signed-off-by: Stanley Chang <stanley_chang@xxxxxxxxxxx> --- v3 to v4 change: Use the compatible name to specify the global register address offset. If the compatible name is "snps,dwc3-rtk-soc", then the offset use 0x8100. Otherwise, the offset is default value 0xc100. v2 to v3 change: 1. Fix the dtschema validation error. v1 to v2 change: 1. Change the name of the property "snps,global-regs-starting-offset". 2. Adjust the format of comment. 3. Add initial value of the global_regs_starting_offset 4. Remove the log of dev_info. --- drivers/usb/dwc3/core.c | 18 +++++++++++++++--- drivers/usb/dwc3/core.h | 5 +++++ 2 files changed, 20 insertions(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 0beaab932e7d..4f69b26d7dab 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -23,6 +23,7 @@ #include <linux/delay.h> #include <linux/dma-mapping.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/of_graph.h> #include <linux/acpi.h> #include <linux/pinctrl/consumer.h> @@ -1793,12 +1794,17 @@ static int dwc3_probe(struct platform_device *pdev) dwc->xhci_resources[0].flags = res->flags; dwc->xhci_resources[0].name = res->name; + dwc->global_regs_starting_offset = (u32)(uintptr_t) + of_device_get_match_data(dev); + if (!dwc->global_regs_starting_offset) + dwc->global_regs_starting_offset = DWC3_GLOBALS_REGS_START; + /* * Request memory region but exclude xHCI regs, * since it will be requested by the xhci-plat driver. */ dwc_res = *res; - dwc_res.start += DWC3_GLOBALS_REGS_START; + dwc_res.start += dwc->global_regs_starting_offset; regs = devm_ioremap_resource(dev, &dwc_res); if (IS_ERR(regs)) @@ -2224,10 +2230,16 @@ static const struct dev_pm_ops dwc3_dev_pm_ops = { #ifdef CONFIG_OF static const struct of_device_id of_dwc3_match[] = { { - .compatible = "snps,dwc3" + .compatible = "snps,dwc3", + .data = (void *)DWC3_GLOBALS_REGS_START, + }, + { + .compatible = "snps,dwc3-rtk-soc", + .data = (void *)DWC3_GLOBALS_REGS_START_FOR_RTK, }, { - .compatible = "synopsys,dwc3" + .compatible = "synopsys,dwc3", + .data = (void *)DWC3_GLOBALS_REGS_START, }, { }, }; diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index d56457c02996..46557cf52f4b 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -84,6 +84,8 @@ #define DWC3_OTG_REGS_START 0xcc00 #define DWC3_OTG_REGS_END 0xccff +#define DWC3_GLOBALS_REGS_START_FOR_RTK 0x8100 + /* Global Registers */ #define DWC3_GSBUSCFG0 0xc100 #define DWC3_GSBUSCFG1 0xc104 @@ -1118,6 +1120,8 @@ struct dwc3_scratchpad_array { * @wakeup_configured: set if the device is configured for remote wakeup. * @imod_interval: set the interrupt moderation interval in 250ns * increments or 0 to disable. + * @global_regs_starting_offset: set the dwc3 global register start address + * and it is default at DWC3_GLOBALS_REGS_START (0xc100). * @max_cfg_eps: current max number of IN eps used across all USB configs. * @last_fifo_depth: last fifo depth used to determine next fifo ram start * address. @@ -1334,6 +1338,7 @@ struct dwc3 { unsigned wakeup_configured:1; u16 imod_interval; + u32 global_regs_starting_offset; int max_cfg_eps; int last_fifo_depth; -- 2.34.1