* [PATCH] i2c: rk3x: fix interrupt handling issue
@ 2014-08-08 9:41 Addy Ke
2014-08-08 10:15 ` Heiko Stübner
2014-08-08 16:34 ` Wolfram Sang
0 siblings, 2 replies; 3+ messages in thread
From: Addy Ke @ 2014-08-08 9:41 UTC (permalink / raw)
To: wsa, max.schwarz, heiko, olof, dianders
Cc: linux-i2c, linux-kernel, cf, xjq, huangtao, zyw, yzq, hj,
kever.yang, hl, caesar.wang, zhengsq, Addy Ke
If slave holds scl, I2C_IPD[7] will be set 1 by controller
for debugging. Driver must ignore it.
[ 5.752391] rk3x-i2c ff160000.i2c: unexpected irq in WRITE: 0x80
[ 5.939027] rk3x-i2c ff160000.i2c: timeout, ipd: 0x80, state: 4
Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
---
drivers/i2c/busses/i2c-rk3x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c
index 9e3084c..eab49e6 100644
--- a/drivers/i2c/busses/i2c-rk3x.c
+++ b/drivers/i2c/busses/i2c-rk3x.c
@@ -399,7 +399,7 @@ static irqreturn_t rk3x_i2c_irq(int irqno, void *dev_id)
}
/* is there anything left to handle? */
- if (unlikely(ipd == 0))
+ if (unlikely((ipd & REG_INT_ALL) == 0))
goto out;
switch (i2c->state) {
--
1.8.3.2
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] i2c: rk3x: fix interrupt handling issue
2014-08-08 9:41 [PATCH] i2c: rk3x: fix interrupt handling issue Addy Ke
@ 2014-08-08 10:15 ` Heiko Stübner
2014-08-08 16:34 ` Wolfram Sang
1 sibling, 0 replies; 3+ messages in thread
From: Heiko Stübner @ 2014-08-08 10:15 UTC (permalink / raw)
To: Addy Ke
Cc: wsa, max.schwarz, olof, dianders, linux-i2c, linux-kernel, cf,
xjq, huangtao, zyw, yzq, hj, kever.yang, hl, caesar.wang, zhengsq
Am Freitag, 8. August 2014, 17:41:40 schrieb Addy Ke:
> If slave holds scl, I2C_IPD[7] will be set 1 by controller
> for debugging. Driver must ignore it.
>
> [ 5.752391] rk3x-i2c ff160000.i2c: unexpected irq in WRITE: 0x80
> [ 5.939027] rk3x-i2c ff160000.i2c: timeout, ipd: 0x80, state: 4
>
> Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
I checked the manuals, bits [31:7] are marked as reserved in all of them, so
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
> ---
> drivers/i2c/busses/i2c-rk3x.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/i2c-rk3x.c b/drivers/i2c/busses/i2c-rk3x.c
> index 9e3084c..eab49e6 100644
> --- a/drivers/i2c/busses/i2c-rk3x.c
> +++ b/drivers/i2c/busses/i2c-rk3x.c
> @@ -399,7 +399,7 @@ static irqreturn_t rk3x_i2c_irq(int irqno, void *dev_id)
> }
>
> /* is there anything left to handle? */
> - if (unlikely(ipd == 0))
> + if (unlikely((ipd & REG_INT_ALL) == 0))
> goto out;
>
> switch (i2c->state) {
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] i2c: rk3x: fix interrupt handling issue
2014-08-08 9:41 [PATCH] i2c: rk3x: fix interrupt handling issue Addy Ke
2014-08-08 10:15 ` Heiko Stübner
@ 2014-08-08 16:34 ` Wolfram Sang
1 sibling, 0 replies; 3+ messages in thread
From: Wolfram Sang @ 2014-08-08 16:34 UTC (permalink / raw)
To: Addy Ke
Cc: max.schwarz, heiko, olof, dianders, linux-i2c, linux-kernel, cf,
xjq, huangtao, zyw, yzq, hj, kever.yang, hl, caesar.wang, zhengsq
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On Fri, Aug 08, 2014 at 05:41:40PM +0800, Addy Ke wrote:
> If slave holds scl, I2C_IPD[7] will be set 1 by controller
> for debugging. Driver must ignore it.
>
> [ 5.752391] rk3x-i2c ff160000.i2c: unexpected irq in WRITE: 0x80
> [ 5.939027] rk3x-i2c ff160000.i2c: timeout, ipd: 0x80, state: 4
>
> Signed-off-by: Addy Ke <addy.ke@rock-chips.com>
Applied to for-next and added stable, thanks!
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-08-08 9:41 [PATCH] i2c: rk3x: fix interrupt handling issue Addy Ke
2014-08-08 10:15 ` Heiko Stübner
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