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Received: from [2600:1700:4830:165f::19e] (port=60758) by vern.gendns.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1k1XRE-0004QC-7q; Fri, 31 Jul 2020 11:59:16 -0400 Subject: Re: [PATCH v4 4/5] irqchip/irq-pruss-intc: Implement irq_{get,set}_irqchip_state ops To: Grzegorz Jaszczyk , Marc Zyngier References: <1595927918-19845-1-git-send-email-grzegorz.jaszczyk@linaro.org> <1595927918-19845-5-git-send-email-grzegorz.jaszczyk@linaro.org> From: David Lechner Message-ID: <71007a86-0a62-a180-33b7-7d963d39f84b@lechnology.com> Date: Fri, 31 Jul 2020 10:59:13 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200731_115919_656038_1A8A30CE X-CRM114-Status: GOOD ( 14.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-omap@vger.kernel.org, jason@lakedaemon.net, "Bajjuri, Praneeth" , linux-kernel@vger.kernel.org, robh+dt@kernel.org, tglx@linutronix.de, Lee Jones , "Mills, William" , linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 7/31/20 7:28 AM, Grzegorz Jaszczyk wrote: > On Wed, 29 Jul 2020 at 21:23, David Lechner wrote: >> >> On 7/28/20 4:18 AM, Grzegorz Jaszczyk wrote: >>> From: David Lechner >>> >>> This implements the irq_get_irqchip_state and irq_set_irqchip_state >>> callbacks for the TI PRUSS INTC driver. The set callback can be used >>> by drivers to "kick" a PRU by injecting a PRU system event. >>> >>> Example: >> >> We could improve this example by showing a device tree node of a >> firmware-defined device implemented in the PRU: >> >> /* Software-defined UART in PRU */ >> pru_uart: serial@XXXX { >> compatible = "ti,pru-uart"; >> ... >> interrupt-parent = <&pruss_intc>; >> /* PRU system event 31, channel 0, host event 0 */ >> interrupts = <31 0 0>, ...; >> interrupt-names = "kick", ...; >> ... >> }, >> >> Then driver would request the IRQ during probe: >> >> data->kick_irq = of_irq_get_byname(dev, "kick"); >> if (data->kick_irq < 0) >> ... >> >> >> And later the driver would use the IRQ to kick the PRU: >> >> irq_set_irqchip_state(data->kick_irq, IRQCHIP_STATE_PENDING, true); >> >> > > We could but I am not sure if this kind of complex example should land > in the commit log. > Marc could you please comment how you want to see this? > > Thank you, > Grzegorz > Based on the discussion in the device tree binding patch, the expanded example I gave is incorrect, so we can just drop it. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel