Commit ec5eb438 authored by Stanley Chang's avatar Stanley Chang Committed by Greg Kroah-Hartman

usb: dwc3: core: add support for realtek SoCs custom's global register start address

The Realtek RTD SoCs were designed with the global register address
offset at 0x8100. The default address offset is constant at
DWC3_GLOBALS_REGS_START (0xc100). Therefore, add a check if the
compatible name of the parent is realtek,rtd-dwc3, then global
register start address will remap to 0x8100.
Signed-off-by: default avatarStanley Chang <stanley_chang@realtek.com>
Acked-by: default avatarThinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20230505025104.18321-1-stanley_chang@realtek.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1c024241
...@@ -1800,6 +1800,17 @@ static int dwc3_probe(struct platform_device *pdev) ...@@ -1800,6 +1800,17 @@ static int dwc3_probe(struct platform_device *pdev)
dwc_res = *res; dwc_res = *res;
dwc_res.start += DWC3_GLOBALS_REGS_START; dwc_res.start += DWC3_GLOBALS_REGS_START;
if (dev->of_node) {
struct device_node *parent = of_get_parent(dev->of_node);
if (of_device_is_compatible(parent, "realtek,rtd-dwc3")) {
dwc_res.start -= DWC3_GLOBALS_REGS_START;
dwc_res.start += DWC3_RTK_RTD_GLOBALS_REGS_START;
}
of_node_put(parent);
}
regs = devm_ioremap_resource(dev, &dwc_res); regs = devm_ioremap_resource(dev, &dwc_res);
if (IS_ERR(regs)) if (IS_ERR(regs))
return PTR_ERR(regs); return PTR_ERR(regs);
......
...@@ -84,6 +84,8 @@ ...@@ -84,6 +84,8 @@
#define DWC3_OTG_REGS_START 0xcc00 #define DWC3_OTG_REGS_START 0xcc00
#define DWC3_OTG_REGS_END 0xccff #define DWC3_OTG_REGS_END 0xccff
#define DWC3_RTK_RTD_GLOBALS_REGS_START 0x8100
/* Global Registers */ /* Global Registers */
#define DWC3_GSBUSCFG0 0xc100 #define DWC3_GSBUSCFG0 0xc100
#define DWC3_GSBUSCFG1 0xc104 #define DWC3_GSBUSCFG1 0xc104
......
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