From: Jiaxun Yang <jiaxun.yang@flygoat.com>
To: linux-mips@vger.kernel.org
Cc: chenhc@lemote.com, paul.burton@mips.com, tglx@linutronix.de,
jason@lakedaemon.net, maz@kernel.org,
linux-kernel@vger.kernel.org, robh+dt@kernel.org,
mark.rutland@arm.co, devicetree@vger.kernel.org,
Jiaxun Yang <jiaxun.yang@flygoat.com>
Subject: [PATCH v1 09/18] irqchip: i8259: Add plat-poll support
Date: Fri, 30 Aug 2019 12:32:23 +0800 [thread overview]
Message-ID: <20190830043232.20191-4-jiaxun.yang@flygoat.com> (raw)
In-Reply-To: <20190830043232.20191-1-jiaxun.yang@flygoat.com>
For some platforms (e.g. Loongson-3), platfrom interrupt controller
supports polling interrupt vector from i8259 automaticly and generating
sepreated interrupt.
Thus we add plat-poll OF property for these platforms and setup sepreated
chained interrupt handler.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
drivers/irqchip/irq-i8259.c | 47 ++++++++++++++++++++++++++++++++-----
1 file changed, 41 insertions(+), 6 deletions(-)
diff --git a/drivers/irqchip/irq-i8259.c b/drivers/irqchip/irq-i8259.c
index d000870d9b6b..e7a9895f3b2d 100644
--- a/drivers/irqchip/irq-i8259.c
+++ b/drivers/irqchip/irq-i8259.c
@@ -40,6 +40,12 @@ static void mask_and_ack_8259A(struct irq_data *d);
static void init_8259A(int auto_eoi);
static int (*i8259_poll)(void) = i8259_irq;
+struct plat_poll_priv {
+ struct irq_domain *domain;
+ int hwirq;
+};
+static struct plat_poll_priv plat_poll_priv[16];
+
static struct irq_chip i8259A_chip = {
.name = "XT-PIC",
.irq_mask = disable_8259A_irq,
@@ -346,22 +352,51 @@ static void i8259_irq_dispatch(struct irq_desc *desc)
generic_handle_irq(irq);
}
+static void plat_poll_irq_dispatch(struct irq_desc *desc)
+{
+ struct plat_poll_priv *priv = irq_desc_get_handler_data(desc);
+ unsigned int irq;
+
+ irq = irq_linear_revmap(priv->domain, priv->hwirq);
+ generic_handle_irq(irq);
+}
+
int __init i8259_of_init(struct device_node *node, struct device_node *parent)
{
struct irq_domain *domain;
- unsigned int parent_irq;
domain = __init_i8259_irqs(node);
- parent_irq = irq_of_parse_and_map(node, 0);
- if (!parent_irq) {
- pr_err("Failed to map i8259 parent IRQ\n");
- irq_domain_remove(domain);
- return -ENODEV;
+ if (of_find_property(node, "plat-poll", NULL)) {
+ int i;
+
+ for (i = 0; i < 16; i++) {
+ int parent_irq = irq_of_parse_and_map(node, i);
+
+ if (!parent_irq) {
+ pr_err("Failed to map %d plat-poll i8259 parent IRQ\n", i);
+ irq_domain_remove(domain);
+ return -ENODEV;
+ }
+ plat_poll_priv[i].domain = domain;
+ plat_poll_priv[i].hwirq = i;
+ irq_set_chained_handler_and_data(parent_irq,
+ plat_poll_irq_dispatch,
+ &plat_poll_priv[i]);
+ }
+ } else {
+ unsigned int parent_irq;
+
+ parent_irq = irq_of_parse_and_map(node, 0);
+ if (!parent_irq) {
+ pr_err("Failed to map i8259 parent IRQ\n");
+ irq_domain_remove(domain);
+ return -ENODEV;
}
irq_set_chained_handler_and_data(parent_irq, i8259_irq_dispatch,
domain);
+ }
return 0;
}
IRQCHIP_DECLARE(i8259, "intel,i8259", i8259_of_init);
--
2.22.0
next prev parent reply other threads:[~2019-08-30 4:33 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-30 4:32 [PATCH v1 06/18] dt-bindings: interrupt-controller: Add Loongson-3 IOINTC Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 07/18] irqchip: Add driver for Loongson-3 HyperTransport interrupt controller Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 08/18] dt-bindings: interrupt-controller: Add Loongson-3 HTINTC Jiaxun Yang
2019-09-02 13:39 ` Rob Herring
2019-08-30 4:32 ` Jiaxun Yang [this message]
2019-08-30 4:32 ` [PATCH v1 10/18] irqchip: mips-cpu: Convert to simple domain Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 11/18] MIPS: Loongson64: Drop legacy IRQ code Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 12/18] dt-bindings: mips: Add loongson cpus & boards Jiaxun Yang
2019-09-13 14:36 ` Rob Herring
2019-08-30 4:32 ` [PATCH v1 13/18] dt-bindings: Document loongson vendor-prefix Jiaxun Yang
2019-09-02 13:39 ` Rob Herring
2019-08-30 4:32 ` [PATCH v1 14/18] MIPS: Loongson64: Add generic dts Jiaxun Yang
[not found] ` <tencent_1942EDDF41E4786E357A4E9D@qq.com>
2019-09-04 6:08 ` Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 15/18] MIPS: Loongson64: Load built-in dtbs Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 16/18] MIPS: Loongson: Regenerate defconfigs Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 17/18] MAINTAINERS: Add new pathes to LOONGSON64 ARCHITECTURE Jiaxun Yang
2019-08-30 4:32 ` [PATCH v1 18/18] MAINTAINERS: Add myself as maintainer of LOONGSON64 Jiaxun Yang
2019-09-02 13:38 ` [PATCH v1 06/18] dt-bindings: interrupt-controller: Add Loongson-3 IOINTC Rob Herring
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