Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754788AbbKXQa4 (ORCPT ); Tue, 24 Nov 2015 11:30:56 -0500 Received: from pmta2.delivery5.ore.mailhop.org ([54.186.218.12]:25518 "EHLO pmta2.delivery5.ore.mailhop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754655AbbKXQay (ORCPT ); Tue, 24 Nov 2015 11:30:54 -0500 X-DKIM: OpenDKIM Filter v2.6.8 io 2E8888018C Date: Tue, 24 Nov 2015 16:30:49 +0000 From: Jason Cooper To: Geert Uytterhoeven Cc: Geert Uytterhoeven , Thomas Gleixner , Marc Zyngier , Magnus Damm , Linux-sh list , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] irqchip/renesas-intc-irqpin: Improve clock error handling and reporting Message-ID: <20151124163049.GV6520@io.lakedaemon.net> References: <1448377693-19597-1-git-send-email-geert+renesas@glider.be> <20151124151937.GS6520@io.lakedaemon.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4482 Lines: 117 Hi Geert, On Tue, Nov 24, 2015 at 04:39:26PM +0100, Geert Uytterhoeven wrote: > On Tue, Nov 24, 2015 at 4:19 PM, Jason Cooper wrote: > > On Tue, Nov 24, 2015 at 04:08:13PM +0100, Geert Uytterhoeven wrote: > >> If the Renesas External IRQ Pin driver cannot find a functional clock, > >> it prints a warning, .e.g. > >> > >> renesas_intc_irqpin fe78001c.interrupt-controller: unable to get clock > >> > >> and continues, as the clock is optional, depending on the SoC type. > >> This warning may confuse users. > >> > >> To fix this, add a flag to indicate that the clock is mandatory or > >> optional, and add a few more compatible entries: > >> - If the clock is mandatory (on R-Mobile A1 or SH-Mobile AG5), a > >> missing clock is now treated as a fatal error, > >> - If the clock is optional (on R-Car Gen1, or using the generic > >> "renesas,intc-irqpin" compatible value), the warning is no longer > >> printed. > >> > >> This requires making struct intc_irqpin_irlm_config more generic by > >> renaming it to intc_irqpin_config, and adding a flag to indicate if IRLM > >> is needed. > >> The new clock flag is merged with the existing shared_irqs boolean into > >> a bitfield to save space. > >> > >> Suggested-by: Magnus Damm > >> Signed-off-by: Geert Uytterhoeven > >> --- > >> Tested on > >> - r8a7779/marzen (no functional clock), > >> - r8a7740/armadillo (with and without mandatory functional clock), > >> - sh73a0/kzm9g (with and without mandatory functional clock). > >> > >> drivers/irqchip/irq-renesas-intc-irqpin.c | 45 ++++++++++++++++++++++--------- > >> 1 file changed, 33 insertions(+), 12 deletions(-) > > > > I'll pick up this a the previous series you just sent (fyi: tglx). > > Thanks! > > >> diff --git a/drivers/irqchip/irq-renesas-intc-irqpin.c b/drivers/irqchip/irq-renesas-intc-irqpin.c > >> index 7f6cf19aa6ac00d7..713177d97c7aa0b6 100644 > >> --- a/drivers/irqchip/irq-renesas-intc-irqpin.c > >> +++ b/drivers/irqchip/irq-renesas-intc-irqpin.c > >> @@ -79,12 +79,15 @@ struct intc_irqpin_priv { > >> struct irq_chip irq_chip; > >> struct irq_domain *irq_domain; > >> struct clk *clk; > >> - bool shared_irqs; > >> + unsigned shared_irqs:1; > >> + unsigned needs_clk:1; > >> u8 shared_irq_mask; > >> }; > >> > >> -struct intc_irqpin_irlm_config { > >> +struct intc_irqpin_config { > >> unsigned int irlm_bit; > >> + unsigned needs_irlm:1; > >> + unsigned needs_clk:1; > >> }; > > > > Why not just stick with bool? Changing shared_irqs -> has_shared_irqs? > > That's another option. It depends on how many flags we will add in the > future... Nope, you're right. > >> static unsigned long intc_irqpin_read32(void __iomem *iomem) > >> @@ -359,8 +362,15 @@ static const struct irq_domain_ops intc_irqpin_irq_domain_ops = { > >> .xlate = irq_domain_xlate_twocell, > >> }; > >> > >> -static const struct intc_irqpin_irlm_config intc_irqpin_irlm_r8a777x = { > >> +static const struct intc_irqpin_config intc_irqpin_irlm_r8a777x = { > >> .irlm_bit = 23, /* ICR0.IRLM0 */ > >> + .needs_irlm = 1, > >> + .needs_clk = 0, > >> +}; > >> + > >> +static const struct intc_irqpin_config intc_irqpin_rmobile = { > >> + .needs_irlm = 0, > >> + .needs_clk = 1, > >> }; > >> > >> static const struct of_device_id intc_irqpin_dt_ids[] = { > >> @@ -369,12 +379,17 @@ static const struct of_device_id intc_irqpin_dt_ids[] = { > >> .data = &intc_irqpin_irlm_r8a777x }, > >> { .compatible = "renesas,intc-irqpin-r8a7779", > >> .data = &intc_irqpin_irlm_r8a777x }, > >> + { .compatible = "renesas,intc-irqpin-r8a7740", > >> + .data = &intc_irqpin_rmobile }, > >> + { .compatible = "renesas,intc-irqpin-sh73a0", > >> + .data = &intc_irqpin_rmobile }, > >> {}, > >> }; > >> MODULE_DEVICE_TABLE(of, intc_irqpin_dt_ids); > > > > Add these compatibles and the clock requirement info to the devicetree > > binding? > > Already there, cfr. > Documentation/devicetree/bindings/interrupt-controller/renesas,intc-irqpin.txt > The clock being mandatory just wasn't enforced. Perfect. thx, Jason. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/