Re: [PATCH v3 2/5] OMAP: mailbox: fix rx interrupt disable in omap4

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On Thu, Nov 18, 2010 at 06:07:40PM -0600, Kanigeri, Hari wrote:
Benoit,

On Thu, Nov 18, 2010 at 5:28 PM, Cousson, Benoit <b-cousson@xxxxxx> wrote:
On 11/18/2010 8:15 PM, Hari Kanigeri wrote:

disabling rx interrupt on omap4 is different than its pre-decessors.
The bit in OMAP4_MAILBOX_IRQENABLE_CLR should be set to disable the
interrupts instead of clearing the bit.

Signed-off-by: Hari Kanigeri<h-kanigeri2@xxxxxx>
---
 arch/arm/mach-omap2/mailbox.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap2/mailbox.c b/arch/arm/mach-omap2/mailbox.c
index 42dbfa4..82b5ced 100644
--- a/arch/arm/mach-omap2/mailbox.c
+++ b/arch/arm/mach-omap2/mailbox.c
@@ -195,7 +195,10 @@ static void omap2_mbox_disable_irq(struct omap_mbox
*mbox,
       struct omap_mbox2_priv *p = (struct omap_mbox2_priv *)mbox->priv;
       u32 l, bit = (irq == IRQ_TX) ? p->notfull_bit : p->newmsg_bit;
       l = mbox_read_reg(p->irqdisable);
-       l&= ~bit;
+       if (cpu_is_omap44xx())

Since it is not omap version specific but IP version specific, you should
not use cpu_is_ to do that. Moreover cpu_is calls should be used during init
only.
You can use the rev field in hwmod_class in order to detect the IP version.
Smartreflex series for 3630 is already using that kind of mechanism.
You will have to copy that revision information into pdata struct and then
use that here.

I see your point, but since mailbox hwmod patches from Omar are still
under review I didn't find any other option than to enable this
This is critical functionality that I want to include in and not wait
till the hwmod patches are accepted.
Please let me know if there is any other way of approaching this problem ?

how about you read the IP revision yourself during probe ? Or pass in a
flag like I said on the other email ?

--
balbi
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