From: Hema HK <hemahk@xxxxxx>
we need to save and restore OTG_INTERFSEL register
else we will be unable to function on resume after
OFF mode.
Reported-by: Devaraj Rangasamy <dev@xxxxxx>
Signed-off-by: Hema HK <hemahk@xxxxxx>
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Vikram Pandita <vikram.pandita@xxxxxx>
---
drivers/usb/musb/musb_core.h | 1 +
drivers/usb/musb/omap2430.c | 6 ++++++
2 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index b3c065a..3259a6b 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -311,6 +311,7 @@ struct musb_context_registers {
u8 index, testmode;
u8 devctl, busctl, misc;
+ u32 otg_interfsel;
struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
};
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index ba85f27..78eb13a 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -491,6 +491,9 @@ static int omap2430_runtime_suspend(struct device *dev)
struct omap2430_glue *glue = dev_get_drvdata(dev);
struct musb *musb = glue_to_musb(glue);
+ musb->context.otg_interfsel = musb_readl(musb->mregs,
+ OTG_INTERFSEL);
+
omap2430_low_level_exit(musb);
otg_set_suspend(musb->xceiv, 1);
@@ -503,6 +506,9 @@ static int omap2430_runtime_resume(struct device *dev)
struct musb *musb = glue_to_musb(glue);
omap2430_low_level_init(musb);
+ musb_writel(musb->mregs, OTG_INTERFSEL,
+ musb->context.otg_interfsel);
+
otg_set_suspend(musb->xceiv, 0);
return 0;
--
1.7.4.1
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