Commit b1026e8a authored by David Lechner's avatar David Lechner Committed by Marc Zyngier
Browse files

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: default avatarSuman Anna <s-anna@ti.com>
Co-developed-by: default avatarGrzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Signed-off-by: default avatarSuman Anna <s-anna@ti.com>
Signed-off-by: default avatarDavid Lechner <david@lechnology.com>
Signed-off-by: default avatarGrzegorz Jaszczyk <grzegorz.jaszczyk@linaro.org>
Reviewed-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 6016f32d

drivers/irqchip/irq-pruss-intc.c

+40 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
 * 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>
@@ -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,

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