diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/irqchip/irq-stm32-exti.c | 69 |
1 files changed, 52 insertions, 17 deletions
diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c index 69a4453c2952..1e0966714e83 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -29,6 +29,14 @@ struct stm32_exti_bank { #define UNDEF_REG ~0 +struct stm32_exti_chip_data { + const struct stm32_exti_bank *reg_bank; + u32 rtsr_cache; + u32 ftsr_cache; +}; + +static struct stm32_exti_chip_data *stm32_exti_data; + static const struct stm32_exti_bank stm32f4xx_exti_b1 = { .imr_ofst = 0x00, .emr_ofst = 0x04, @@ -81,7 +89,8 @@ static const struct stm32_exti_bank *stm32h7xx_exti_banks[] = { static unsigned long stm32_exti_pending(struct irq_chip_generic *gc) { - const struct stm32_exti_bank *stm32_bank = gc->private; + struct stm32_exti_chip_data *chip_data = gc->private; + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; unsigned long pending; pending = irq_reg_readl(gc, stm32_bank->rpr_ofst); @@ -119,7 +128,8 @@ static void stm32_irq_handler(struct irq_desc *desc) static int stm32_irq_set_type(struct irq_data *data, unsigned int type) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); - const struct stm32_exti_bank *stm32_bank = gc->private; + struct stm32_exti_chip_data *chip_data = gc->private; + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; int pin = data->hwirq % IRQS_PER_BANK; u32 rtsr, ftsr; @@ -154,25 +164,36 @@ static int stm32_irq_set_type(struct irq_data *data, unsigned int type) return 0; } -static int stm32_irq_set_wake(struct irq_data *data, unsigned int on) +static void stm32_irq_suspend(struct irq_chip_generic *gc) { - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); - const struct stm32_exti_bank *stm32_bank = gc->private; - int pin = data->hwirq % IRQS_PER_BANK; - u32 imr; + struct stm32_exti_chip_data *chip_data = gc->private; + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; irq_gc_lock(gc); - imr = irq_reg_readl(gc, stm32_bank->imr_ofst); - if (on) - imr |= BIT(pin); - else - imr &= ~BIT(pin); - irq_reg_writel(gc, imr, stm32_bank->imr_ofst); + /* save rtsr, ftsr registers */ + chip_data->rtsr_cache = irq_reg_readl(gc, stm32_bank->rtsr_ofst); + chip_data->ftsr_cache = irq_reg_readl(gc, stm32_bank->ftsr_ofst); + + irq_reg_writel(gc, gc->wake_active, stm32_bank->imr_ofst); irq_gc_unlock(gc); +} - return 0; +static void stm32_irq_resume(struct irq_chip_generic *gc) +{ + struct stm32_exti_chip_data *chip_data = gc->private; + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; + + irq_gc_lock(gc); + + /* restore rtsr, ftsr registers */ + irq_reg_writel(gc, chip_data->rtsr_cache, stm32_bank->rtsr_ofst); + irq_reg_writel(gc, chip_data->ftsr_cache, stm32_bank->ftsr_ofst); + + irq_reg_writel(gc, gc->mask_cache, stm32_bank->imr_ofst); + + irq_gc_unlock(gc); } static int stm32_exti_alloc(struct irq_domain *d, unsigned int virq, @@ -205,7 +226,8 @@ static const struct irq_domain_ops irq_exti_domain_ops = { static void stm32_irq_ack(struct irq_data *d) { struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); - const struct stm32_exti_bank *stm32_bank = gc->private; + struct stm32_exti_chip_data *chip_data = gc->private; + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; irq_gc_lock(gc); @@ -232,6 +254,11 @@ __init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks, return -ENOMEM; } + stm32_exti_data = kcalloc(bank_nr, sizeof(*stm32_exti_data), + GFP_KERNEL); + if (!stm32_exti_data) + return -ENOMEM; + domain = irq_domain_add_linear(node, bank_nr * IRQS_PER_BANK, &irq_exti_domain_ops, NULL); if (!domain) { @@ -251,8 +278,11 @@ __init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks, for (i = 0; i < bank_nr; i++) { const struct stm32_exti_bank *stm32_bank = stm32_exti_banks[i]; + struct stm32_exti_chip_data *chip_data = &stm32_exti_data[i]; u32 irqs_mask; + chip_data->reg_bank = stm32_bank; + gc = irq_get_domain_generic_chip(domain, i * IRQS_PER_BANK); gc->reg_base = base; @@ -261,9 +291,13 @@ __init stm32_exti_init(const struct stm32_exti_bank **stm32_exti_banks, gc->chip_types->chip.irq_mask = irq_gc_mask_clr_bit; gc->chip_types->chip.irq_unmask = irq_gc_mask_set_bit; gc->chip_types->chip.irq_set_type = stm32_irq_set_type; - gc->chip_types->chip.irq_set_wake = stm32_irq_set_wake; + gc->chip_types->chip.irq_set_wake = irq_gc_set_wake; + gc->suspend = stm32_irq_suspend; + gc->resume = stm32_irq_resume; + gc->wake_enabled = IRQ_MSK(IRQS_PER_BANK); + gc->chip_types->regs.mask = stm32_bank->imr_ofst; - gc->private = (void *)stm32_bank; + gc->private = (void *)chip_data; /* Determine number of irqs supported */ writel_relaxed(~0UL, base + stm32_bank->rtsr_ofst); @@ -300,6 +334,7 @@ out_free_domain: irq_domain_remove(domain); out_unmap: iounmap(base); + kfree(stm32_exti_data); return ret; } |