On 06/18/2013 10:54 AM, J, KEERTHY wrote: > Hi Stephen, > >> -----Original Message----- >> From: Stephen Warren [mailto:swarren@xxxxxxxxxxxxx] >> Sent: Tuesday, June 18, 2013 9:22 PM >> To: J, KEERTHY >> Cc: linux-omap@xxxxxxxxxxxxxxx; broonie@xxxxxxxxxx; >> ldewangan@xxxxxxxxxx; sameo@xxxxxxxxxxxxxxx; grant.likely@xxxxxxxxxxxx; >> swarren@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux- >> doc@xxxxxxxxxxxxxxx; gg@xxxxxxxxxxxxxxx >> Subject: Re: [PATCH v2 1/4] MFD: Palmas: Check if interrupts property >> exists and then only request irq >> >> On 06/18/2013 04:01 AM, J Keerthy wrote: >>> Check if interrupts property exists and then only request irq. >>> On some boards INT line might not be connected to a valid irq line on >>> the application processor. Hence keeping a check before requesting >>> irq. >> >> When there is no interrupts property, surely i2c->irq == 0, which is an >> invalid IRQ, and hence there's no need to check this before copying the >> value? > > The intent here is NOT to request irq with 0 or Invalid IRQ. Sure. > The board File will not populate the interrupts entry if the INT line is not > Connected. Do you mean the interrupts DT property won't be present if there is no interrupt. If so, sure. > Hence the patch checks for the 'interrupts' property. That shouldn't be necessary; IIRC, the I2C core has already parsed the interrupts property if there was one, and if there wasn't, it has set i2c->irq to some invalid value already. So, you simply need to check the value in i2c->irq, and don't need to look at the DT at all. -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
