mfd: Provide the PRCMU with its own IRQ domain
The PRCMU has its own USB, Thermal, GPIO, Modem, HSI and RTC drivers,
amongst other things. This patch allows those subordinate devices to
use it as an interrupt controller as and when they are DT enabled.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 6fb11b7..bac4876 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -270,6 +270,8 @@
struct prcmu_fw_version version;
} fw_info;
+static struct irq_domain *db8500_irq_domain;
+
/*
* This vector maps irq numbers to the bits in the bit field used in
* communication with the PRCMU firmware.
@@ -2623,7 +2625,7 @@
spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
- mb0_transfer.req.dbb_irqs &= ~prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
+ mb0_transfer.req.dbb_irqs &= ~prcmu_irq_bit[d->hwirq];
spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
@@ -2637,7 +2639,7 @@
spin_lock_irqsave(&mb0_transfer.dbb_irqs_lock, flags);
- mb0_transfer.req.dbb_irqs |= prcmu_irq_bit[d->irq - IRQ_PRCMU_BASE];
+ mb0_transfer.req.dbb_irqs |= prcmu_irq_bit[d->hwirq];
spin_unlock_irqrestore(&mb0_transfer.dbb_irqs_lock, flags);
@@ -2677,9 +2679,37 @@
}
}
+static int db8500_irq_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(virq, &prcmu_irq_chip,
+ handle_simple_irq);
+ set_irq_flags(virq, IRQF_VALID);
+
+ return 0;
+}
+
+static struct irq_domain_ops db8500_irq_ops = {
+ .map = db8500_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+static int db8500_irq_init(struct device_node *np)
+{
+ db8500_irq_domain = irq_domain_add_legacy(
+ np, NUM_PRCMU_WAKEUPS, IRQ_PRCMU_BASE,
+ 0, &db8500_irq_ops, NULL);
+
+ if (!db8500_irq_domain) {
+ pr_err("Failed to create irqdomain\n");
+ return -ENOSYS;
+ }
+
+ return 0;
+}
+
void __init db8500_prcmu_early_init(void)
{
- unsigned int i;
if (cpu_is_u8500v2()) {
void *tcpm_base = ioremap_nocache(U8500_PRCMU_TCPM_BASE, SZ_4K);
@@ -2724,15 +2754,6 @@
INIT_WORK(&mb0_transfer.mask_work, prcmu_mask_work);
- /* Initalize irqs. */
- for (i = 0; i < NUM_PRCMU_WAKEUPS; i++) {
- unsigned int irq;
-
- irq = IRQ_PRCMU_BASE + i;
- irq_set_chip_and_handler(irq, &prcmu_irq_chip,
- handle_simple_irq);
- set_irq_flags(irq, IRQF_VALID);
- }
compute_armss_rate();
}
@@ -3040,6 +3061,8 @@
goto no_irq_return;
}
+ db8500_irq_init(np);
+
for (i = 0; i < ARRAY_SIZE(db8500_prcmu_devs); i++) {
if (!strcmp(db8500_prcmu_devs[i].name, "ab8500-core")) {
db8500_prcmu_devs[i].platform_data = ab8500_platdata;