Hi Bin,

On Mon, 2019-01-21 at 09:59 -0600, Bin Liu wrote:

Hi Min,

On Mon, Jan 21, 2019 at 08:22:30PM +0800, min.guo@mediatek.com wrote:

quoted

From: Min Guo <redacted>

Delete the const attribute of addr parameter in readb/w/l hooks, these
changes are for implementing clearing W1C registers.
Replace musb_readb/w with musb_clearb/w to clear the interrupt status.

Signed-off-by: Min Guo <redacted>
---
new patch based on v3:
---
 drivers/usb/musb/musb_core.c | 32 +++++++++++++++++++++++---------
 drivers/usb/musb/musb_core.h |  8 ++++++--
 drivers/usb/musb/musb_io.h   |  8 +++++---
 drivers/usb/musb/musbhsdma.c |  3 +++
 drivers/usb/musb/sunxi.c     |  4 ++--
 drivers/usb/musb/tusb6010.c  |  2 +-
 6 files changed, 40 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 2fe5225..5ef8848 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c

[snip]

quoted

diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c
index b2394a7..7bf91cb 100644
--- a/drivers/usb/musb/musbhsdma.c
+++ b/drivers/usb/musb/musbhsdma.c

@@ -286,6 +286,9 @@ irqreturn_t dma_controller_irq(int irq, void *private_data)
 
 	int_hsdma = musb_readb(mbase, MUSB_HSDMA_INTR);
 
+	/* clear pending interrupts by manual */
+	musb_clearb(musb->mregs, MUSB_HSDMA_INTR);
+

Make musb_clearb/w() return the value of the _read() instead of
_write(), so that we don't have to read twice here. The value of
_write() is not used anyway.

The change above can be:

	int_hsdma = musb_clearb(mbase, MUSB_HSDMA_INTR);

Please see my comments in 6/6 for details.

Okay.

Regards,
-Bin.

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