From: Suman Anna <s-anna@ti.com>
To: Marc Zyngier <marc.zyngier@arm.com>,
Rob Herring <robh+dt@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Cooper <jason@lakedaemon.net>
Cc: devicetree@vger.kernel.org,
Grygorii Strashko <grygorii.strashko@ti.com>,
David Lechner <david@lechnology.com>,
Tony Lindgren <tony@atomide.com>, Sekhar Nori <nsekhar@ti.com>,
linux-kernel@vger.kernel.org, "Andrew F. Davis" <afd@ti.com>,
Lokesh Vutla <lokeshvutla@ti.com>,
Murali Karicheri <m-karicheri2@ti.com>,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
Roger Quadros <rogerq@ti.com>
Subject: [PATCH 5/6] irqchip/irq-pruss-intc: Add API to trigger a PRU sysevent
Date: Sun, 7 Jul 2019 22:52:42 -0500 [thread overview]
Message-ID: <20190708035243.12170-6-s-anna@ti.com> (raw)
In-Reply-To: <20190708035243.12170-1-s-anna@ti.com>
From: "Andrew F. Davis" <afd@ti.com>
The PRUSS INTC can generate an interrupt to various processor
subsystems on the SoC through a set of 64 possible PRU system
events. These system events can be used by PRU client drivers
or applications for event notifications/signalling between PRUs
and MPU or other processors. A new API, pruss_intc_trigger() is
provided to MPU-side PRU client drivers/applications to be able
to trigger an event/interrupt using IRQ numbers provided by the
PRUSS-INTC irqdomain chip.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
---
drivers/irqchip/irq-pruss-intc.c | 31 +++++++++++++++++++++++++++++++
include/linux/pruss_intc.h | 26 ++++++++++++++++++++++++++
2 files changed, 57 insertions(+)
create mode 100644 include/linux/pruss_intc.h
diff --git a/drivers/irqchip/irq-pruss-intc.c b/drivers/irqchip/irq-pruss-intc.c
index 8118c2a2ac43..a0ad50b95cd5 100644
--- a/drivers/irqchip/irq-pruss-intc.c
+++ b/drivers/irqchip/irq-pruss-intc.c
@@ -421,6 +421,37 @@ static void pruss_intc_irq_relres(struct irq_data *data)
module_put(THIS_MODULE);
}
+/**
+ * pruss_intc_trigger() - trigger a PRU system event
+ * @irq: linux IRQ number associated with a PRU system event
+ *
+ * Trigger an interrupt by signalling a specific PRU system event.
+ * This can be used by PRUSS client users to raise/send an event to
+ * a PRU or any other core that is listening on the host interrupt
+ * mapped to that specific PRU system event. The @irq variable is the
+ * Linux IRQ number associated with a specific PRU system event that
+ * a client user/application uses. The interrupt mappings for this is
+ * provided by the PRUSS INTC irqchip instance.
+ *
+ * Returns 0 on success, or an error value upon failure.
+ */
+int pruss_intc_trigger(unsigned int irq)
+{
+ struct irq_desc *desc;
+
+ if (irq <= 0)
+ return -EINVAL;
+
+ desc = irq_to_desc(irq);
+ if (!desc)
+ return -EINVAL;
+
+ pruss_intc_irq_retrigger(&desc->irq_data);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(pruss_intc_trigger);
+
static int pruss_intc_irq_domain_map(struct irq_domain *d, unsigned int virq,
irq_hw_number_t hw)
{
diff --git a/include/linux/pruss_intc.h b/include/linux/pruss_intc.h
new file mode 100644
index 000000000000..84aa7f7edf42
--- /dev/null
+++ b/include/linux/pruss_intc.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/**
+ * TI PRU-ICSS Subsystem user interfaces
+ *
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com
+ * Andrew F. Davis <afd@ti.com>
+ * Suman Anna <s-anna@ti.com>
+ */
+
+#ifndef __LINUX_PRUSS_INTC_H
+#define __LINUX_PRUSS_INTC_H
+
+#if IS_ENABLED(CONFIG_TI_PRUSS_INTC)
+
+int pruss_intc_trigger(unsigned int irq);
+
+#else
+
+static inline int pruss_intc_trigger(unsigned int irq)
+{
+ return -ENOTSUPP;
+}
+
+#endif /* CONFIG_TI_PRUSS_INTC */
+
+#endif /* __LINUX_PRUSS_INTC_H */
--
2.22.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2019-07-08 3:55 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-08 3:52 [PATCH 0/6] Add TI PRUSS Local Interrupt Controller IRQChip driver Suman Anna
2019-07-08 3:52 ` [PATCH 1/6] dt-bindings: irqchip: Add PRUSS interrupt controller bindings Suman Anna
2019-07-08 14:34 ` Andrew F. Davis
2019-07-08 15:59 ` Suman Anna
2019-07-10 17:08 ` David Lechner
2019-07-16 17:07 ` Suman Anna
2019-07-24 16:34 ` Rob Herring
2019-07-24 19:42 ` Suman Anna
2019-07-25 22:27 ` Rob Herring
2019-07-08 3:52 ` [PATCH 2/6] irqchip/irq-pruss-intc: Add a PRUSS irqchip driver for PRUSS interrupts Suman Anna
2019-07-11 16:45 ` David Lechner
2019-07-16 17:21 ` Suman Anna
2019-07-17 17:21 ` David Lechner
2019-07-17 18:56 ` Suman Anna
2019-07-08 3:52 ` [PATCH 3/6] irqchip/irq-pruss-intc: Add support for shared and invalid interrupts Suman Anna
2019-07-08 3:52 ` [PATCH 4/6] irqchip/irq-pruss-intc: Add helper functions to configure internal mapping Suman Anna
2019-07-11 3:10 ` David Lechner
2019-07-11 22:09 ` David Lechner
2019-07-16 23:29 ` Suman Anna
2019-07-17 17:57 ` David Lechner
2019-07-17 19:04 ` Suman Anna
2019-07-08 3:52 ` Suman Anna [this message]
2019-07-11 20:40 ` [PATCH 5/6] irqchip/irq-pruss-intc: Add API to trigger a PRU sysevent David Lechner
2019-07-08 3:52 ` [PATCH 6/6] irqchip/irq-pruss-intc: Add support for ICSSG INTC on K3 SoCs Suman Anna
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190708035243.12170-6-s-anna@ti.com \
--to=s-anna@ti.com \
--cc=afd@ti.com \
--cc=david@lechnology.com \
--cc=devicetree@vger.kernel.org \
--cc=grygorii.strashko@ti.com \
--cc=jason@lakedaemon.net \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-omap@vger.kernel.org \
--cc=lokeshvutla@ti.com \
--cc=m-karicheri2@ti.com \
--cc=marc.zyngier@arm.com \
--cc=nsekhar@ti.com \
--cc=robh+dt@kernel.org \
--cc=rogerq@ti.com \
--cc=tglx@linutronix.de \
--cc=tony@atomide.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).