diff options
Diffstat (limited to 'target/linux/ath79/patches-4.19/0007-irqchip-irq-ath79-intc-add-irq-cascade-driver-for-QC.patch')
| -rw-r--r-- | target/linux/ath79/patches-4.19/0007-irqchip-irq-ath79-intc-add-irq-cascade-driver-for-QC.patch | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/target/linux/ath79/patches-4.19/0007-irqchip-irq-ath79-intc-add-irq-cascade-driver-for-QC.patch b/target/linux/ath79/patches-4.19/0007-irqchip-irq-ath79-intc-add-irq-cascade-driver-for-QC.patch deleted file mode 100644 index bd26107af5..0000000000 --- a/target/linux/ath79/patches-4.19/0007-irqchip-irq-ath79-intc-add-irq-cascade-driver-for-QC.patch +++ /dev/null @@ -1,168 +0,0 @@ -From f3eacff2310a60348a755c50a8da6fc251fc8587 Mon Sep 17 00:00:00 2001 -From: John Crispin <john@phrozen.org> -Date: Tue, 6 Mar 2018 09:55:13 +0100 -Subject: [PATCH 07/33] irqchip/irq-ath79-intc: add irq cascade driver for - QCA9556 SoCs - -Signed-off-by: John Crispin <john@phrozen.org> ---- - drivers/irqchip/Makefile | 1 + - drivers/irqchip/irq-ath79-intc.c | 142 +++++++++++++++++++++++++++++++++++++++ - 2 files changed, 143 insertions(+) - create mode 100644 drivers/irqchip/irq-ath79-intc.c - ---- a/drivers/irqchip/Makefile -+++ b/drivers/irqchip/Makefile -@@ -3,6 +3,7 @@ obj-$(CONFIG_IRQCHIP) += irqchip.o - - obj-$(CONFIG_ALPINE_MSI) += irq-alpine-msi.o - obj-$(CONFIG_ATH79) += irq-ath79-cpu.o -+obj-$(CONFIG_ATH79) += irq-ath79-intc.o - obj-$(CONFIG_ATH79) += irq-ath79-misc.o - obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o - obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2836.o ---- /dev/null -+++ b/drivers/irqchip/irq-ath79-intc.c -@@ -0,0 +1,142 @@ -+/* -+ * Atheros AR71xx/AR724x/AR913x specific interrupt handling -+ * -+ * Copyright (C) 2018 John Crispin <john@phrozen.org> -+ * -+ * This program is free software; you can redistribute it and/or modify it -+ * under the terms of the GNU General Public License version 2 as published -+ * by the Free Software Foundation. -+ */ -+ -+#include <linux/interrupt.h> -+#include <linux/irqchip.h> -+#include <linux/of.h> -+#include <linux/of_irq.h> -+#include <linux/irqdomain.h> -+ -+#include <asm/irq_cpu.h> -+#include <asm/mach-ath79/ath79.h> -+#include <asm/mach-ath79/ar71xx_regs.h> -+ -+#define ATH79_MAX_INTC_CASCADE 3 -+ -+struct ath79_intc { -+ struct irq_chip chip; -+ u32 irq; -+ u32 pending_mask; -+ u32 int_status; -+ u32 irq_mask[ATH79_MAX_INTC_CASCADE]; -+ u32 irq_wb_chan[ATH79_MAX_INTC_CASCADE]; -+}; -+ -+static void ath79_intc_irq_handler(struct irq_desc *desc) -+{ -+ struct irq_domain *domain = irq_desc_get_handler_data(desc); -+ struct ath79_intc *intc = domain->host_data; -+ u32 pending; -+ -+ pending = ath79_reset_rr(intc->int_status); -+ pending &= intc->pending_mask; -+ -+ if (pending) { -+ int i; -+ -+ for (i = 0; i < domain->hwirq_max; i++) -+ if (pending & intc->irq_mask[i]) { -+ if (intc->irq_wb_chan[i] != 0xffffffff) -+ ath79_ddr_wb_flush(intc->irq_wb_chan[i]); -+ generic_handle_irq(irq_find_mapping(domain, i)); -+ } -+ } else { -+ spurious_interrupt(); -+ } -+} -+ -+static void ath79_intc_irq_enable(struct irq_data *d) -+{ -+ struct ath79_intc *intc = d->domain->host_data; -+ enable_irq(intc->irq); -+} -+ -+static void ath79_intc_irq_disable(struct irq_data *d) -+{ -+ struct ath79_intc *intc = d->domain->host_data; -+ disable_irq(intc->irq); -+} -+ -+static int ath79_intc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw) -+{ -+ struct ath79_intc *intc = d->host_data; -+ -+ irq_set_chip_and_handler(irq, &intc->chip, handle_level_irq); -+ -+ return 0; -+} -+ -+static const struct irq_domain_ops ath79_irq_domain_ops = { -+ .xlate = irq_domain_xlate_onecell, -+ .map = ath79_intc_map, -+}; -+ -+static int __init ath79_intc_of_init( -+ struct device_node *node, struct device_node *parent) -+{ -+ struct irq_domain *domain; -+ struct ath79_intc *intc; -+ int cnt, cntwb, i, err; -+ -+ cnt = of_property_count_u32_elems(node, "qca,pending-bits"); -+ if (cnt > ATH79_MAX_INTC_CASCADE) -+ panic("Too many INTC pending bits\n"); -+ -+ intc = kzalloc(sizeof(*intc), GFP_KERNEL); -+ if (!intc) -+ panic("Failed to allocate INTC memory\n"); -+ intc->chip = dummy_irq_chip; -+ intc->chip.name = "INTC"; -+ intc->chip.irq_disable = ath79_intc_irq_disable; -+ intc->chip.irq_enable = ath79_intc_irq_enable; -+ -+ if (of_property_read_u32(node, "qca,int-status-addr", &intc->int_status) < 0) { -+ panic("Missing address of interrupt status register\n"); -+ } -+ -+ of_property_read_u32_array(node, "qca,pending-bits", intc->irq_mask, cnt); -+ for (i = 0; i < cnt; i++) { -+ intc->pending_mask |= intc->irq_mask[i]; -+ intc->irq_wb_chan[i] = 0xffffffff; -+ } -+ -+ cntwb = of_count_phandle_with_args( -+ node, "qca,ddr-wb-channels", "#qca,ddr-wb-channel-cells"); -+ -+ for (i = 0; i < cntwb; i++) { -+ struct of_phandle_args args; -+ u32 irq = i; -+ -+ of_property_read_u32_index( -+ node, "qca,ddr-wb-channel-interrupts", i, &irq); -+ if (irq >= ATH79_MAX_INTC_CASCADE) -+ continue; -+ -+ err = of_parse_phandle_with_args( -+ node, "qca,ddr-wb-channels", -+ "#qca,ddr-wb-channel-cells", -+ i, &args); -+ if (err) -+ return err; -+ -+ intc->irq_wb_chan[irq] = args.args[0]; -+ } -+ -+ intc->irq = irq_of_parse_and_map(node, 0); -+ if (!intc->irq) -+ panic("Failed to get INTC IRQ"); -+ -+ domain = irq_domain_add_linear(node, cnt, &ath79_irq_domain_ops, intc); -+ irq_set_chained_handler_and_data(intc->irq, ath79_intc_irq_handler, domain); -+ -+ return 0; -+} -+IRQCHIP_DECLARE(ath79_intc, "qca,ar9340-intc", -+ ath79_intc_of_init); |