linux-kernel - RE: [PATCH v5 08/10] irqchip: Add Sunplus SP7021 interrupt controller driver

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Date:   Wed, 8 Dec 2021 07:15:57 +0000
From:   qinjian[覃健] <qinjian@...lus1.com>
To:     Marc Zyngier <maz@...nel.org>
CC:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        Wells Lu 呂芳騰 <wells.lu@...plus.com>
Subject: RE: [PATCH v5 08/10] irqchip: Add Sunplus SP7021 interrupt controller
 driver

> > +void sp_intc_set_ext(u32 hwirq, int ext_num)
> > +{
> > +	sp_intc_assign_bit(hwirq, REG_INTR_PRIORITY, !ext_num);
> > +}
> > +EXPORT_SYMBOL_GPL(sp_intc_set_ext);
> 
> No way. We don't export random symbols without a good justification,
> and you didn't give any.
> 

This function called by SP7021 display driver to decide DISPLAY_IRQ
routing to which parent irq (EXT_INT0 or EXT_INT1).

In previous patches, which defined in DT, parsed & processed @ sp_intc_xlate_of()
From your comment, this is a SW decision. So I removed it from DT & intc driver, only 
export this function to access the related intc reg.