Re: [Xen-devel] [PATCH V9 2/3] drivers/pl011: Use combination of UARTRIS and UARTMSC instead of UARTMIS

[Shanker Donthineni <shankerd@xxxxxxxxxxxxxx>]

On 06/13/2016 05:30 AM, Stefano Stabellini wrote:
> On Thu, 9 Jun 2016, Shanker Donthineni wrote:
> > The Masked interrupt status register (UARTMIS) is not described in ARM
> > SBSA 2.x document. Anding of two registers UARTMSC and UARTRIS values
> > gives the same information as register UARTMIS.
> >
> > UARTRIS, UARTMSC and UARTMIS definitions are found in PrimeCell UART
> > PL011 (Revision: r1p4).
> >   - 3.3.10 Interrupt mask set/clear register, UARTIMSC
> >   - 3.3.11 Raw interrupt status register, UARTRIS
> >   - 3.3.12 Masked interrupt status register, UARTMIS
> >
> > This change is necessary for driver to be SBSA compliant v2.x without
> > affecting the current driver functionality.
> >
> > Signed-off-by: Shanker Donthineni <shankerd@xxxxxxxxxxxxxx>
> > Reviewed-by: Julien Grall <julien.grall@xxxxxxx>
> >
> > Changes since v8:
> >   Fixed white spaces.
> >
> > Changes since v7:
> >   Moved comment 'To compatible with SBSA v2.x document, all accesses
> should be 32-bit' to #3
> > Changes since v1:
> >   Added a new function to return an interrupt status.
> >
> >   xen/drivers/char/pl011.c | 10 ++++++++--
> >   1 file changed, 8 insertions(+), 2 deletions(-)
> >
> > diff --git a/xen/drivers/char/pl011.c b/xen/drivers/char/pl011.c
> > index 6a3c21b..7e19c4a 100644
> > --- a/xen/drivers/char/pl011.c
> > +++ b/xen/drivers/char/pl011.c
> > @@ -53,11 +53,17 @@ static struct pl011 {
> >   #define pl011_read(uart, off)           readl((uart)->regs + (off))
> >   #define pl011_write(uart, off,val)      writel((val), (uart)->regs +
> (off))
> >   
> > +static unsigned int pl011_intr_status(struct pl011 *uart)
> Maybe this should be static inline?
>
> In any case the series is good, I am happy to queue it up for 4.8.
Nice discussion on usage of keyword 'inline', 
https://www.kernel.org/doc/local/inline.html.
--
Shanker Donthineni
Qualcomm Technologies, Inc. on behalf of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux 
Foundation Collaborative Project


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