From: Ido Yariv <ido@wizery.com> To: "Nori, Sekhar" <nsekhar@ti.com> Cc: "davinci-linux-open-source@linux.davincidsp.com" <davinci-linux-open-source@linux.davincidsp.com>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>, Thomas Gleixner <tglx@linutronix.de> Subject: Re: [PATCH v3 1/6] arm: davinci: Fix low level gpio irq handlers' argument Date: Wed, 13 Jul 2011 01:19:15 +0300 [thread overview] Message-ID: <20110712221915.GD5633@WorkStation> (raw) In-Reply-To: <B85A65D85D7EB246BE421B3FB0FBB593024DA7AEF2@dbde02.ent.ti.com> Hi Sekhar, On Tue, Jul 12, 2011 at 02:52:17PM +0530, Nori, Sekhar wrote: > > - g = (__force struct davinci_gpio_regs __iomem *) irq_desc_get_handler_data(desc); > > + ctl = (struct davinci_gpio_controller *)irq_desc_get_handler_data(desc); > > + g = (struct davinci_gpio_regs __iomem *)ctl->regs; > > > > /* we only care about one bank */ > > if (irq & 1) > > @@ -278,7 +280,7 @@ gpio_irq_handler(unsigned irq, struct irq_desc *desc) > > status >>= 16; > > > > /* now demux them to the right lowlevel handler */ > > - n = (int)irq_get_handler_data(irq); > > + n = ctl->irq_base; > > I realized that this breaks for odd banks as the status is > right shifted by 16. The GPIO you are using must have been > in even bank? You're absolutely right, I missed that. And yes, I have been using an even bank GPIO. > > while (status) { > > res = ffs(status); > > n += res; > > @@ -424,7 +426,13 @@ static int __init davinci_gpio_irq_setup(void) > > > > /* set up all irqs in this bank */ > > irq_set_chained_handler(bank_irq, gpio_irq_handler); > > - irq_set_handler_data(bank_irq, (__force void *)g); > > + > > + /* > > + * Each chip handles 32 gpios, and each irq bank consists of 16 > > + * gpio irqs. Pass the irq bank's corresponding controller to > > + * the chained irq handler. > > + */ > > + irq_set_handler_data(bank_irq, &chips[bank * 16 / 32]); > > This can simply be: > > irq_set_handler_data(bank_irq, &chips[gpio / 32]); > > In the interest of time, I did these fixes and pushed the > patch to "fixes" branch of git://gitorious.org/linux-davinci/linux-davinci.git > > Can you please test it out and let me know if it works. This patch seems to work just fine. I'm afraid I can't test an odd bank GPIO here to verify that this indeed fixed the issue you raised, but it looks correct. Thanks, Ido.
WARNING: multiple messages have this Message-ID (diff)
From: ido@wizery.com (Ido Yariv) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/6] arm: davinci: Fix low level gpio irq handlers' argument Date: Wed, 13 Jul 2011 01:19:15 +0300 [thread overview] Message-ID: <20110712221915.GD5633@WorkStation> (raw) In-Reply-To: <B85A65D85D7EB246BE421B3FB0FBB593024DA7AEF2@dbde02.ent.ti.com> Hi Sekhar, On Tue, Jul 12, 2011 at 02:52:17PM +0530, Nori, Sekhar wrote: > > - g = (__force struct davinci_gpio_regs __iomem *) irq_desc_get_handler_data(desc); > > + ctl = (struct davinci_gpio_controller *)irq_desc_get_handler_data(desc); > > + g = (struct davinci_gpio_regs __iomem *)ctl->regs; > > > > /* we only care about one bank */ > > if (irq & 1) > > @@ -278,7 +280,7 @@ gpio_irq_handler(unsigned irq, struct irq_desc *desc) > > status >>= 16; > > > > /* now demux them to the right lowlevel handler */ > > - n = (int)irq_get_handler_data(irq); > > + n = ctl->irq_base; > > I realized that this breaks for odd banks as the status is > right shifted by 16. The GPIO you are using must have been > in even bank? You're absolutely right, I missed that. And yes, I have been using an even bank GPIO. > > while (status) { > > res = ffs(status); > > n += res; > > @@ -424,7 +426,13 @@ static int __init davinci_gpio_irq_setup(void) > > > > /* set up all irqs in this bank */ > > irq_set_chained_handler(bank_irq, gpio_irq_handler); > > - irq_set_handler_data(bank_irq, (__force void *)g); > > + > > + /* > > + * Each chip handles 32 gpios, and each irq bank consists of 16 > > + * gpio irqs. Pass the irq bank's corresponding controller to > > + * the chained irq handler. > > + */ > > + irq_set_handler_data(bank_irq, &chips[bank * 16 / 32]); > > This can simply be: > > irq_set_handler_data(bank_irq, &chips[gpio / 32]); > > In the interest of time, I did these fixes and pushed the > patch to "fixes" branch of git://gitorious.org/linux-davinci/linux-davinci.git > > Can you please test it out and let me know if it works. This patch seems to work just fine. I'm afraid I can't test an odd bank GPIO here to verify that this indeed fixed the issue you raised, but it looks correct. Thanks, Ido.
next prev parent reply other threads:[~2011-07-12 22:19 UTC|newest] Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-07-10 13:14 [PATCH v2 0/6] arm: davinci: DA850: wl12xx expansion card Ido Yariv 2011-07-10 13:14 ` Ido Yariv 2011-07-10 13:14 ` [PATCH v2 1/6] arm: davinci: Fix low level gpio irq handlers' argument Ido Yariv 2011-07-10 13:14 ` Ido Yariv 2011-07-11 11:58 ` Nori, Sekhar 2011-07-11 11:58 ` Nori, Sekhar 2011-07-11 20:33 ` Ido Yariv 2011-07-11 20:33 ` Ido Yariv 2011-07-11 21:03 ` [PATCH v3 " Ido Yariv 2011-07-11 21:03 ` Ido Yariv 2011-07-12 9:22 ` Nori, Sekhar 2011-07-12 9:22 ` Nori, Sekhar 2011-07-12 22:19 ` Ido Yariv [this message] 2011-07-12 22:19 ` Ido Yariv 2011-07-10 13:14 ` [PATCH v2 2/6] arm: davinci: Explicitly set channel controllers' default queues Ido Yariv 2011-07-10 13:14 ` Ido Yariv 2011-07-25 13:15 ` Nori, Sekhar 2011-07-25 13:15 ` Nori, Sekhar 2011-07-25 13:33 ` Sergei Shtylyov 2011-07-25 13:33 ` Sergei Shtylyov 2011-07-25 16:31 ` Nori, Sekhar 2011-07-25 16:31 ` Nori, Sekhar 2011-07-29 14:42 ` Ben Gardiner 2011-07-29 14:42 ` Ben Gardiner 2011-07-10 13:14 ` [PATCH v2 3/6] arm: davinci: mmc: Add support for set_power callback Ido Yariv 2011-07-10 13:14 ` Ido Yariv 2011-07-25 13:19 ` Nori, Sekhar 2011-07-25 13:19 ` Nori, Sekhar 2011-07-28 20:49 ` [PATCH REPOST v2] mmc: davinci: " Ido Yariv 2011-07-28 20:49 ` Ido Yariv 2011-07-28 22:02 ` Chris Ball 2011-07-28 22:02 ` Chris Ball 2011-07-10 13:14 ` [PATCH v2 4/6] arm: davinci: DA850: Add MMC/SD1 pinmux configuration Ido Yariv 2011-07-10 13:14 ` Ido Yariv 2011-07-10 13:14 ` [PATCH v2 5/6] arm: davinci: DA850: Add GPIO pinmux configuration for wl1271 Ido Yariv 2011-07-10 13:14 ` Ido Yariv 2011-07-25 13:23 ` Nori, Sekhar 2011-07-25 13:23 ` Nori, Sekhar 2011-07-10 13:14 ` [PATCH v2 6/6] arm: davinci: DA850: Add wl1271/wlan support Ido Yariv 2011-07-10 13:14 ` Ido Yariv 2011-07-25 17:40 ` Nori, Sekhar 2011-07-25 17:40 ` Nori, Sekhar 2011-07-28 18:34 ` Ido Yariv 2011-07-28 18:34 ` Ido Yariv 2011-08-22 7:37 ` Harishkumar V 2011-07-28 20:52 ` [PATCH v3] davinci: Add wl1271/wlan support for AM18x Ido Yariv 2011-07-28 20:52 ` Ido Yariv 2011-07-28 21:15 ` Troy Kisky 2011-07-28 21:15 ` Troy Kisky 2011-07-28 22:06 ` Ido Yariv 2011-07-28 22:06 ` Ido Yariv 2011-07-29 18:51 ` Troy Kisky 2011-07-29 18:51 ` Troy Kisky 2011-08-03 13:27 ` Nori, Sekhar 2011-08-04 7:51 ` [PATCH v4] ARM: davinci: AM18x: Add wl1271/wlan support Ido Yariv 2011-08-04 7:51 ` Ido Yariv 2011-08-04 8:40 ` Jaya Kumar 2011-08-04 8:40 ` Jaya Kumar 2011-08-04 9:22 ` Ido Yariv 2011-08-04 9:22 ` Ido Yariv 2011-09-01 11:59 ` Nori, Sekhar 2011-09-01 11:59 ` Nori, Sekhar
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