irqchip/stm32: Add stm32h7 support

stm32h7 has up to 96 inputs
(3 banks of 32 inputs max).

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index ef37870..8f409a9 100644 (file)
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -38,6 +38,39 @@ static const struct stm32_exti_bank *stm32f4xx_exti_banks[] = {
        &stm32f4xx_exti_b1,
 };
 
+static const struct stm32_exti_bank stm32h7xx_exti_b1 = {
+       .imr_ofst       = 0x80,
+       .emr_ofst       = 0x84,
+       .rtsr_ofst      = 0x00,
+       .ftsr_ofst      = 0x04,
+       .swier_ofst     = 0x08,
+       .pr_ofst        = 0x88,
+};
+
+static const struct stm32_exti_bank stm32h7xx_exti_b2 = {
+       .imr_ofst       = 0x90,
+       .emr_ofst       = 0x94,
+       .rtsr_ofst      = 0x20,
+       .ftsr_ofst      = 0x24,
+       .swier_ofst     = 0x28,
+       .pr_ofst        = 0x98,
+};
+
+static const struct stm32_exti_bank stm32h7xx_exti_b3 = {
+       .imr_ofst       = 0xA0,
+       .emr_ofst       = 0xA4,
+       .rtsr_ofst      = 0x40,
+       .ftsr_ofst      = 0x44,
+       .swier_ofst     = 0x48,
+       .pr_ofst        = 0xA8,
+};
+
+static const struct stm32_exti_bank *stm32h7xx_exti_banks[] = {
+       &stm32h7xx_exti_b1,
+       &stm32h7xx_exti_b2,
+       &stm32h7xx_exti_b3,
+};
+
 static unsigned long stm32_exti_pending(struct irq_chip_generic *gc)
 {
        const struct stm32_exti_bank *stm32_bank = gc->private;
@@ -256,3 +289,12 @@ static int __init stm32f4_exti_of_init(struct device_node *np,
 }
 
 IRQCHIP_DECLARE(stm32f4_exti, "st,stm32-exti", stm32f4_exti_of_init);
+
+static int __init stm32h7_exti_of_init(struct device_node *np,
+                                      struct device_node *parent)
+{
+       return stm32_exti_init(stm32h7xx_exti_banks,
+                       ARRAY_SIZE(stm32h7xx_exti_banks), np);
+}
+
+IRQCHIP_DECLARE(stm32h7_exti, "st,stm32h7-exti", stm32h7_exti_of_init);