Re: [PATCH-v3 02/11] i2c: pxa: No need to set slave addr for i2c master mode reset

[Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>]

[-- Attachment #1: Type: text/plain, Size: 1370 bytes --]

On Tue, Jul 07, 2015 at 12:54:46AM +0530, Vaibhav Hiremath wrote:
> Normally i2c controller works as master, so slave addr is not needed, or it
> will impact some slave device (eg. ST NFC chip) i2c accesses, because it has
> the same i2c address with controller.

Just to make sure: Does it? As I read the code, slave interrupts are
enabled later only when slave mode is selected? Is that a HW bug? And if
so, can't the code just be moved into this #ifdef block later?

> 
> Signed-off-by: Jett.Zhou <jtzhou-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>
> Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Acked-by: Robert Jarzmik <robert.jarzmik-GANU6spQydw@public.gmane.org>
> ---
>  drivers/i2c/busses/i2c-pxa.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
> index f4ac8c5..023e59f 100644
> --- a/drivers/i2c/busses/i2c-pxa.c
> +++ b/drivers/i2c/busses/i2c-pxa.c
> @@ -459,7 +459,7 @@ static void i2c_pxa_reset(struct pxa_i2c *i2c)
>  	writel(I2C_ISR_INIT, _ISR(i2c));
>  	writel(readl(_ICR(i2c)) & ~ICR_UR, _ICR(i2c));
>  
> -	if (i2c->reg_isar)
> +	if (i2c->reg_isar && IS_ENABLED(CONFIG_I2C_PXA_SLAVE))
>  		writel(i2c->slave_addr, _ISAR(i2c));
>  
>  	/* set control register values */
> -- 
> 1.9.1
> 

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 819 bytes --]