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. 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> --- v5->v6: - Drop example from the commit log 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(+) diff --git a/drivers/irqchip/irq-pruss-intc.c b/drivers/irqchip/irq-pruss-intc.c index 396dc55..41c6271 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, -- 2.7.4
