| Message ID | 1630346073-7099-3-git-send-email-sanm@codeaurora.org (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | USB DWC3 QCOM Multi power domain support | expand |
Hi, Sandeep Maheswaram <sanm@codeaurora.org> writes: > Add multi pd support to set performance state for cx domain > to maintain minimum corner voltage for USB clocks. > > Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org> > --- > drivers/usb/dwc3/dwc3-qcom.c | 49 ++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 49 insertions(+) > > diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c > index 9abbd01..777a647 100644 > --- a/drivers/usb/dwc3/dwc3-qcom.c > +++ b/drivers/usb/dwc3/dwc3-qcom.c > @@ -17,6 +17,7 @@ > #include <linux/of_platform.h> > #include <linux/platform_device.h> > #include <linux/phy/phy.h> > +#include <linux/pm_domain.h> > #include <linux/usb/of.h> > #include <linux/reset.h> > #include <linux/iopoll.h> > @@ -89,6 +90,10 @@ struct dwc3_qcom { > bool pm_suspended; > struct icc_path *icc_path_ddr; > struct icc_path *icc_path_apps; > + /* power domain for cx */ > + struct device *pd_cx; > + /* power domain for usb gdsc */ > + struct device *pd_usb_gdsc; > }; > > static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val) > @@ -521,6 +526,46 @@ static int dwc3_qcom_setup_irq(struct platform_device *pdev) > return 0; > } > > +static int dwc3_qcom_attach_pd(struct device *dev) > +{ > + struct dwc3_qcom *qcom = dev_get_drvdata(dev); > + struct device_link *link; > + > + /* Do nothing when in a single power domain */ > + if (dev->pm_domain) > + return 0; > + > + qcom->pd_cx = dev_pm_domain_attach_by_name(dev, "cx"); > + if (IS_ERR(qcom->pd_cx)) > + return PTR_ERR(qcom->pd_cx); > + /* Do nothing when power domain missing */ > + if (!qcom->pd_cx) > + return 0; > + link = device_link_add(dev, qcom->pd_cx, > + DL_FLAG_STATELESS | > + DL_FLAG_PM_RUNTIME | > + DL_FLAG_RPM_ACTIVE); > + if (!link) { > + dev_err(dev, "Failed to add device_link to cx pd.\n"); do you need to call dev_pm_domain_dettach() here? > + return -EINVAL; > + } > + > + qcom->pd_usb_gdsc = dev_pm_domain_attach_by_name(dev, "usb_gdsc"); > + if (IS_ERR(qcom->pd_usb_gdsc)) do you need to call dev_pm_domain_dettach() here? > + return PTR_ERR(qcom->pd_usb_gdsc); > + > + link = device_link_add(dev, qcom->pd_usb_gdsc, > + DL_FLAG_STATELESS | > + DL_FLAG_PM_RUNTIME | > + DL_FLAG_RPM_ACTIVE); > + if (!link) { > + dev_err(dev, "Failed to add device_link to usb gdsc pd.\n"); do you need to call dev_pm_domain_dettach() here?
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 9abbd01..777a647 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -17,6 +17,7 @@ #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/phy/phy.h> +#include <linux/pm_domain.h> #include <linux/usb/of.h> #include <linux/reset.h> #include <linux/iopoll.h> @@ -89,6 +90,10 @@ struct dwc3_qcom { bool pm_suspended; struct icc_path *icc_path_ddr; struct icc_path *icc_path_apps; + /* power domain for cx */ + struct device *pd_cx; + /* power domain for usb gdsc */ + struct device *pd_usb_gdsc; }; static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val) @@ -521,6 +526,46 @@ static int dwc3_qcom_setup_irq(struct platform_device *pdev) return 0; } +static int dwc3_qcom_attach_pd(struct device *dev) +{ + struct dwc3_qcom *qcom = dev_get_drvdata(dev); + struct device_link *link; + + /* Do nothing when in a single power domain */ + if (dev->pm_domain) + return 0; + + qcom->pd_cx = dev_pm_domain_attach_by_name(dev, "cx"); + if (IS_ERR(qcom->pd_cx)) + return PTR_ERR(qcom->pd_cx); + /* Do nothing when power domain missing */ + if (!qcom->pd_cx) + return 0; + link = device_link_add(dev, qcom->pd_cx, + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | + DL_FLAG_RPM_ACTIVE); + if (!link) { + dev_err(dev, "Failed to add device_link to cx pd.\n"); + return -EINVAL; + } + + qcom->pd_usb_gdsc = dev_pm_domain_attach_by_name(dev, "usb_gdsc"); + if (IS_ERR(qcom->pd_usb_gdsc)) + return PTR_ERR(qcom->pd_usb_gdsc); + + link = device_link_add(dev, qcom->pd_usb_gdsc, + DL_FLAG_STATELESS | + DL_FLAG_PM_RUNTIME | + DL_FLAG_RPM_ACTIVE); + if (!link) { + dev_err(dev, "Failed to add device_link to usb gdsc pd.\n"); + return -EINVAL; + } + + return 0; +} + static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count) { struct device *dev = qcom->dev; @@ -837,6 +882,10 @@ static int dwc3_qcom_probe(struct platform_device *pdev) if (ret) goto interconnect_exit; + ret = dwc3_qcom_attach_pd(dev); + if (ret) + goto interconnect_exit; + device_init_wakeup(&pdev->dev, 1); qcom->is_suspended = false; pm_runtime_set_active(dev);
Add multi pd support to set performance state for cx domain to maintain minimum corner voltage for USB clocks. Signed-off-by: Sandeep Maheswaram <sanm@codeaurora.org> --- drivers/usb/dwc3/dwc3-qcom.c | 49 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+)