From 5a2490e029c29065c6bc2f63c10a985f85522998 Mon Sep 17 00:00:00 2001 From: Ludovic Barre Date: Thu, 26 Apr 2018 18:18:29 +0200 Subject: [PATCH] irqchip/stm32: Prepare common functions This patch prepares functions which could be reused by next variant of stm32 exti controller. Signed-off-by: Ludovic Barre Signed-off-by: Marc Zyngier --- drivers/irqchip/irq-stm32-exti.c | 91 ++++++++++++++++++++------------ 1 file changed, 58 insertions(+), 33 deletions(-) diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c index 9655a574c86f..b38c6555d66f 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -145,37 +145,50 @@ static void stm32_irq_handler(struct irq_desc *desc) chained_irq_exit(chip, desc); } -static int stm32_irq_set_type(struct irq_data *data, unsigned int type) +static int stm32_exti_set_type(struct irq_data *d, + unsigned int type, u32 *rtsr, u32 *ftsr) { - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); - 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; - - irq_gc_lock(gc); - - rtsr = irq_reg_readl(gc, stm32_bank->rtsr_ofst); - ftsr = irq_reg_readl(gc, stm32_bank->ftsr_ofst); + u32 mask = BIT(d->hwirq % IRQS_PER_BANK); switch (type) { case IRQ_TYPE_EDGE_RISING: - rtsr |= BIT(pin); - ftsr &= ~BIT(pin); + *rtsr |= mask; + *ftsr &= ~mask; break; case IRQ_TYPE_EDGE_FALLING: - rtsr &= ~BIT(pin); - ftsr |= BIT(pin); + *rtsr &= ~mask; + *ftsr |= mask; break; case IRQ_TYPE_EDGE_BOTH: - rtsr |= BIT(pin); - ftsr |= BIT(pin); + *rtsr |= mask; + *ftsr |= mask; break; default: - irq_gc_unlock(gc); return -EINVAL; } + return 0; +} + +static int stm32_irq_set_type(struct irq_data *d, unsigned int type) +{ + struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d); + struct stm32_exti_chip_data *chip_data = gc->private; + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; + u32 rtsr, ftsr; + int err; + + irq_gc_lock(gc); + + rtsr = irq_reg_readl(gc, stm32_bank->rtsr_ofst); + ftsr = irq_reg_readl(gc, stm32_bank->ftsr_ofst); + + err = stm32_exti_set_type(d, type, &rtsr, &ftsr); + if (err) { + irq_gc_unlock(gc); + return err; + } + irq_reg_writel(gc, rtsr, stm32_bank->rtsr_ofst); irq_reg_writel(gc, ftsr, stm32_bank->ftsr_ofst); @@ -184,35 +197,47 @@ static int stm32_irq_set_type(struct irq_data *data, unsigned int type) return 0; } -static void stm32_irq_suspend(struct irq_chip_generic *gc) +static void stm32_chip_suspend(struct stm32_exti_chip_data *chip_data, + u32 wake_active) { - struct stm32_exti_chip_data *chip_data = gc->private; const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; - - irq_gc_lock(gc); + void __iomem *base = chip_data->host_data->base; /* 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); + chip_data->rtsr_cache = readl_relaxed(base + stm32_bank->rtsr_ofst); + chip_data->ftsr_cache = readl_relaxed(base + stm32_bank->ftsr_ofst); - irq_reg_writel(gc, gc->wake_active, stm32_bank->imr_ofst); + writel_relaxed(wake_active, base + stm32_bank->imr_ofst); +} - irq_gc_unlock(gc); +static void stm32_chip_resume(struct stm32_exti_chip_data *chip_data, + u32 mask_cache) +{ + const struct stm32_exti_bank *stm32_bank = chip_data->reg_bank; + void __iomem *base = chip_data->host_data->base; + + /* restore rtsr, ftsr, registers */ + writel_relaxed(chip_data->rtsr_cache, base + stm32_bank->rtsr_ofst); + writel_relaxed(chip_data->ftsr_cache, base + stm32_bank->ftsr_ofst); + + writel_relaxed(mask_cache, base + stm32_bank->imr_ofst); } -static void stm32_irq_resume(struct irq_chip_generic *gc) +static void stm32_irq_suspend(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); + stm32_chip_suspend(chip_data, gc->wake_active); + irq_gc_unlock(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); +static void stm32_irq_resume(struct irq_chip_generic *gc) +{ + struct stm32_exti_chip_data *chip_data = gc->private; + irq_gc_lock(gc); + stm32_chip_resume(chip_data, gc->mask_cache); irq_gc_unlock(gc); } -- 2.45.2