diff mbox series

[RESEND,v5,4/5] irqchip/irq-pruss-intc: Implement irq_{get,set}_irqchip_state ops

Message ID 1598886558-16546-5-git-send-email-grzegorz.jaszczyk@linaro.org
State Superseded
Headers show
Series Add TI PRUSS Local Interrupt Controller IRQChip driver | expand

Commit Message

Grzegorz Jaszczyk Aug. 31, 2020, 3:09 p.m. UTC 
From: David Lechner <david@lechnology.com>


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:
     irq_set_irqchip_state(irq, IRQCHIP_STATE_PENDING, true);

Signed-off-by: David Lechner <david@lechnology.com>

Signed-off-by: Suman Anna <s-anna@ti.com>

Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>

Reviewed-by: Lee Jones <lee.jones@linaro.org>

---
v4->v5:
- No change.
v3->v4:
- Update commit message
v2->v3:
- Get rid of unnecessary pruss_intc_check_write() and use
  pruss_intc_write_reg directly.
v1->v2:
- https://patchwork.kernel.org/patch/11069769/
---
 drivers/irqchip/irq-pruss-intc.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

-- 
2.7.4

Comments

Marc Zyngier Sept. 12, 2020, 9:49 a.m. UTC | #1 
On Mon, 31 Aug 2020 16:09:17 +0100,
Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> wrote:
> 

> From: David Lechner <david@lechnology.com>

> 

> 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:

>      irq_set_irqchip_state(irq, IRQCHIP_STATE_PENDING, true);

>


Please drop this "example", it brings nothing without the full
context. This patch just implements a standard callback.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.
Grzegorz Jaszczyk Sept. 14, 2020, 2:59 p.m. UTC | #2 
On Sat, 12 Sep 2020 at 11:49, Marc Zyngier <maz@kernel.org> wrote:
>
> On Mon, 31 Aug 2020 16:09:17 +0100,
> Grzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org> wrote:
> >
> > From: David Lechner <david@lechnology.com>
> >
> > 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:
> >      irq_set_irqchip_state(irq, IRQCHIP_STATE_PENDING, true);
> >
>
> Please drop this "example", it brings nothing without the full
> context. This patch just implements a standard callback.
>

Ok. Thank you for your review,
Grzegorz
diff mbox series

Patch

diff --git a/drivers/irqchip/irq-pruss-intc.c b/drivers/irqchip/irq-pruss-intc.c
index 1a72591..15f0407 100644
--- a/drivers/irqchip/irq-pruss-intc.c
+++ b/drivers/irqchip/irq-pruss-intc.c
@@ -9,6 +9,7 @@ 
  * Copyright (C) 2019 David Lechner <david@lechnology.com>
  */
 
+#include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/irqdomain.h>
@@ -319,6 +320,43 @@  static void pruss_intc_irq_relres(struct irq_data *data)
 	module_put(THIS_MODULE);
 }
 
+static int pruss_intc_irq_get_irqchip_state(struct irq_data *data,
+					    enum irqchip_irq_state which,
+					    bool *state)
+{
+	struct pruss_intc *intc = irq_data_get_irq_chip_data(data);
+	u32 reg, mask, srsr;
+
+	if (which != IRQCHIP_STATE_PENDING)
+		return -EINVAL;
+
+	reg = PRU_INTC_SRSR(data->hwirq / 32);
+	mask = BIT(data->hwirq % 32);
+
+	srsr = pruss_intc_read_reg(intc, reg);
+
+	*state = !!(srsr & mask);
+
+	return 0;
+}
+
+static int pruss_intc_irq_set_irqchip_state(struct irq_data *data,
+					    enum irqchip_irq_state which,
+					    bool state)
+{
+	struct pruss_intc *intc = irq_data_get_irq_chip_data(data);
+
+	if (which != IRQCHIP_STATE_PENDING)
+		return -EINVAL;
+
+	if (state)
+		pruss_intc_write_reg(intc, PRU_INTC_SISR, data->hwirq);
+	else
+		pruss_intc_write_reg(intc, PRU_INTC_SICR, data->hwirq);
+
+	return 0;
+}
+
 static struct irq_chip pruss_irqchip = {
 	.name = "pruss-intc",
 	.irq_ack = pruss_intc_irq_ack,
@@ -326,6 +364,8 @@  static struct irq_chip pruss_irqchip = {
 	.irq_unmask = pruss_intc_irq_unmask,
 	.irq_request_resources = pruss_intc_irq_reqres,
 	.irq_release_resources = pruss_intc_irq_relres,
+	.irq_get_irqchip_state = pruss_intc_irq_get_irqchip_state,
+	.irq_set_irqchip_state = pruss_intc_irq_set_irqchip_state,
 };
 
 static int pruss_intc_validate_mapping(struct pruss_intc *intc, int event,