libplatsupport/src/arch/arm/irqchip/omap3.c

/*
 * Copyright 2020, Data61, CSIRO (ABN 41 687 119 230)
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <assert.h>
#include <stdbool.h>

#include <utils/util.h>

#include "../../../irqchip.h"

#define TI_OMAP3_INT_CELL_COUNT 1

static int parse_ti_omap3_interrupts(char *dtb_blob, int node_offset, int intr_controller_phandle,
                                     irq_walk_cb_fn_t callback, void *token)
{
    bool is_extended = false;
    int prop_len = 0;
    const void *interrupts_prop = get_interrupts_prop(dtb_blob, node_offset, &is_extended, &prop_len);
    assert(interrupts_prop != NULL);
    if (is_extended) {
        ZF_LOGE("ti omap3 extended interrupts property not supported");
        return ENODEV;
    }
    int UNUSED total_cells = prop_len / sizeof(uint32_t);
    /* There's only one interrupt cell for this IRQ chip */
    /* TODO: rebase on riscv/plic.c and allow multiple callbacks */
    assert(total_cells == TI_OMAP3_INT_CELL_COUNT);
    ps_irq_t irq = { .type = PS_INTERRUPT, .irq = { .number = READ_CELL(1, interrupts_prop, 0) }};
    int error = callback(irq, 0, TI_OMAP3_INT_CELL_COUNT, token);
    if (error) {
        return error;
    }
    return 0;
}

char *ti_omap3_compatible_list[] = {
    "ti,omap3-intc",
    /* in the kernel's hardware.yml, these are equivalent */
    "ti,am33xx-intc",
    NULL
};
DEFINE_IRQCHIP_PARSER(ti_omap3, ti_omap3_compatible_list, parse_ti_omap3_interrupts);