ENGR00277805-6 usb: chipidea: add ci_hdrc_enter_lpm API

It is used to let the PHY enters low power mode at
controller suspend routine.

Signed-off-by: Peter Chen <peter.chen@freescale.com>

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 619d13e29995dc9ac5010081068528b0f4932d91..20aa600e0bfeb76edb65dd55f3d97af9085d2dbf 100644 (file)
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -539,6 +539,20 @@ void ci_hdrc_remove_device(struct platform_device *pdev)
 }
 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
 
+void ci_hdrc_enter_lpm(struct platform_device *pdev, bool enable)
+{
+       struct ci_hdrc *ci = platform_get_drvdata(pdev);
+       enum ci_hw_regs reg = ci->hw_bank.lpm ? OP_DEVLC : OP_PORTSC;
+
+       if (enable)
+               hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
+                               PORTSC_PHCD(ci->hw_bank.lpm));
+       else
+               hw_write(ci, reg, PORTSC_PHCD(ci->hw_bank.lpm),
+                               0);
+}
+EXPORT_SYMBOL_GPL(ci_hdrc_enter_lpm);
+
 static inline void ci_role_destroy(struct ci_hdrc *ci)
 {
        ci_hdrc_gadget_destroy(ci);

diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index bbe779f640bed0c91869d527b67d9d797b8441b7..1eaa2c3a8101053871c2c01418977b44d889eef1 100644 (file)
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -43,4 +43,5 @@ struct platform_device *ci_hdrc_add_device(struct device *dev,
 /* Remove ci hdrc device */
 void ci_hdrc_remove_device(struct platform_device *pdev);
 
+void ci_hdrc_enter_lpm(struct platform_device *pdev, bool enable);
 #endif