The following commit has been merged into the irq/core branch of tip:
Commit-ID: b1026e8a95e430e615579f14f0f73c94f9690468
Gitweb: https://git.kernel.org/tip/b1026e8a95e430e615579f14f0f73c94f9690468
Author: David Lechner <david@xxxxxxxxxxxxxx>
AuthorDate: Wed, 16 Sep 2020 18:36:37 +02:00
Committer: Marc Zyngier <maz@xxxxxxxxxx>
CommitterDate: Thu, 17 Sep 2020 12:20:32 +01:00
irqchip/irq-pruss-intc: Implement irq_{get, set}_irqchip_state ops
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.
Co-developed-by: Suman Anna <s-anna@xxxxxx>
Co-developed-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@xxxxxxxxxx>
Signed-off-by: Suman Anna <s-anna@xxxxxx>
Signed-off-by: David Lechner <david@xxxxxxxxxxxxxx>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@xxxxxxxxxx>
Reviewed-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
drivers/irqchip/irq-pruss-intc.c | 40 +++++++++++++++++++++++++++++++-
1 file changed, 40 insertions(+)
diff --git a/drivers/irqchip/irq-pruss-intc.c b/drivers/irqchip/irq-pruss-intc.c
index e7ba358..bfe529a 100644
--- a/drivers/irqchip/irq-pruss-intc.c
+++ b/drivers/irqchip/irq-pruss-intc.c
@@ -12,6 +12,7 @@
* Copyright (C) 2019 David Lechner <david@xxxxxxxxxxxxxx>
*/
+#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h>
@@ -323,6 +324,43 @@ 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,
@@ -330,6 +368,8 @@ 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,
|