On 7/28/20 4:18 AM, Grzegorz Jaszczyk wrote:
From: David Lechner <david@xxxxxxxxxxxxxx>
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);
irq_set_irqchip_state(irq, IRQCHIP_STATE_PENDING, true);
Signed-off-by: David Lechner <david@xxxxxxxxxxxxxx>
Signed-off-by: Suman Anna <s-anna@xxxxxx>
Signed-off-by: Grzegorz Jaszczyk <grzegorz.jaszczyk@xxxxxxxxxx>
Reviewed-by: Lee Jones <lee.jones@xxxxxxxxxx>
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