It is used to let the PHY enters low power mode at
controller suspend routine.
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
drivers/usb/chipidea/bits.h | 1 +
drivers/usb/chipidea/core.c | 14 ++++++++++++++
include/linux/usb/chipidea.h | 1 +
3 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h
index dd0cf9e..9f936a3 100644
--- a/drivers/usb/chipidea/bits.h
+++ b/drivers/usb/chipidea/bits.h
@@ -48,6 +48,7 @@
#define PORTSC_SUSP BIT(7)
#define PORTSC_HSP BIT(9)
#define PORTSC_PTC (0x0FUL << 16)
+#define PORTSC_PHCD(d) ((d) ? BIT(22) : BIT(23))
/* PTS and PTW for non lpm version only */
#define PORTSC_PTS(d) \
((((d) & 0x3) << 30) | (((d) & 0x4) ? BIT(25) : 0))
diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index c47a6b4..a68e281 100644
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -451,6 +451,20 @@ 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 7d39967..0263730 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -41,4 +41,5 @@ 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
--
1.7.1
--
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