Add a quirk to clear the GUSB2PHYCFG.U2_FREECLK_EXISTS bit, which specifies whether the USB2.0 PHY provides a free-running PHY clock, which is active when the clock control input is active. Signed-off-by: William Wu <william.wu@xxxxxxxxxxxxxx> --- Changes in v5: - None Changes in v4: - rebase on top of balbi testing/next, remove pdata (balbi) Changes in v3: - None Changes in v2: - None Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++ drivers/usb/dwc3/core.c | 5 +++++ drivers/usb/dwc3/core.h | 5 +++++ 3 files changed, 13 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt index 7d7ce08..1ada121 100644 --- a/Documentation/devicetree/bindings/usb/dwc3.txt +++ b/Documentation/devicetree/bindings/usb/dwc3.txt @@ -39,6 +39,9 @@ Optional properties: disabling the suspend signal to the PHY. - snps,dis_rxdet_inp3_quirk: when set core will disable receiver detection in PHY P3 power state. + - snps,dis_u2_freeclk_exists_quirk: when set, clear the u2_freeclk_exists + in GUSB2PHYCFG, specify that USB2 PHY doesn't provide + a free-running PHY clock. - snps,is-utmi-l1-suspend: true when DWC3 asserts output signal utmi_l1_suspend_n, false when asserts utmi_sleep_n - snps,hird-threshold: HIRD threshold diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 9466431..34ab9c3 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -500,6 +500,9 @@ static int dwc3_phy_setup(struct dwc3 *dwc) if (dwc->dis_enblslpm_quirk) reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM; + if (dwc->dis_u2_freeclk_exists_quirk) + reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS; + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); return 0; @@ -924,6 +927,8 @@ static int dwc3_probe(struct platform_device *pdev) "snps,dis_enblslpm_quirk"); dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev, "snps,dis_rxdet_inp3_quirk"); + dwc->dis_u2_freeclk_exists_quirk = device_property_read_bool(dev, + "snps,dis_u2_freeclk_exists_quirk"); dwc->tx_de_emphasis_quirk = device_property_read_bool(dev, "snps,tx_de_emphasis_quirk"); diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 45d6de5..f321a5c 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -199,6 +199,7 @@ /* Global USB2 PHY Configuration Register */ #define DWC3_GUSB2PHYCFG_PHYSOFTRST (1 << 31) +#define DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS (1 << 30) #define DWC3_GUSB2PHYCFG_SUSPHY (1 << 6) #define DWC3_GUSB2PHYCFG_ULPI_UTMI (1 << 4) #define DWC3_GUSB2PHYCFG_ENBLSLPM (1 << 8) @@ -799,6 +800,9 @@ struct dwc3_scratchpad_array { * @dis_u2_susphy_quirk: set if we disable usb2 suspend phy * @dis_enblslpm_quirk: set if we clear enblslpm in GUSB2PHYCFG, * disabling the suspend signal to the PHY. + * @dis_u2_freeclk_exists_quirk : set if we clear u2_freeclk_exists + * in GUSB2PHYCFG, specify that USB2 PHY doesn't + * provide a free-running PHY clock. * @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk * @tx_de_emphasis: Tx de-emphasis value * 0 - -6dB de-emphasis @@ -942,6 +946,7 @@ struct dwc3 { unsigned dis_u2_susphy_quirk:1; unsigned dis_enblslpm_quirk:1; unsigned dis_rxdet_inp3_quirk:1; + unsigned dis_u2_freeclk_exists_quirk:1; unsigned tx_de_emphasis_quirk:1; unsigned tx_de_emphasis:2; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html