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author | Qing Zhang <zhangqing@loongson.cn> | 2021-03-15 15:50:02 +0800 |
---|---|---|
committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2021-03-25 10:44:01 +0100 |
commit | b2c4c3969fd7d79caf05f1ebfcaa330e020ecc36 (patch) | |
tree | 14ef0495417db1919c3ca20e66d06e0a161fef8d /drivers | |
parent | 44151ea08978cea536fa9e7b95efca336994048d (diff) | |
download | linux-stable-b2c4c3969fd7d79caf05f1ebfcaa330e020ecc36.tar.gz linux-stable-b2c4c3969fd7d79caf05f1ebfcaa330e020ecc36.tar.bz2 linux-stable-b2c4c3969fd7d79caf05f1ebfcaa330e020ecc36.zip |
irqchip/loongson-liointc: irqchip add 2.0 version
Add IO interrupt controller support for Loongson-2K1000, different
from the Loongson-3A series is that Loongson-2K1000 has 64 interrupt
sources, 0-31 correspond to the device tree liointc0 device node, and
the other correspond to liointc1 node.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Tested-by: Ming Wang <wangming01@loongson.cn>
Acked-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/irqchip/irq-loongson-liointc.c | 58 |
1 files changed, 49 insertions, 9 deletions
diff --git a/drivers/irqchip/irq-loongson-liointc.c b/drivers/irqchip/irq-loongson-liointc.c index 249566a23cc4..8ccb30421806 100644 --- a/drivers/irqchip/irq-loongson-liointc.c +++ b/drivers/irqchip/irq-loongson-liointc.c @@ -20,6 +20,7 @@ #define LIOINTC_CHIP_IRQ 32 #define LIOINTC_NUM_PARENT 4 +#define LIOINTC_NUM_CORES 4 #define LIOINTC_INTC_CHIP_START 0x20 @@ -42,6 +43,7 @@ struct liointc_handler_data { struct liointc_priv { struct irq_chip_generic *gc; struct liointc_handler_data handler[LIOINTC_NUM_PARENT]; + void __iomem *core_isr[LIOINTC_NUM_CORES]; u8 map_cache[LIOINTC_CHIP_IRQ]; bool has_lpc_irq_errata; }; @@ -51,11 +53,12 @@ static void liointc_chained_handle_irq(struct irq_desc *desc) struct liointc_handler_data *handler = irq_desc_get_handler_data(desc); struct irq_chip *chip = irq_desc_get_chip(desc); struct irq_chip_generic *gc = handler->priv->gc; + int core = get_ebase_cpunum() % LIOINTC_NUM_CORES; u32 pending; chained_irq_enter(chip, desc); - pending = readl(gc->reg_base + LIOINTC_REG_INTC_STATUS); + pending = readl(handler->priv->core_isr[core]); if (!pending) { /* Always blame LPC IRQ if we have that bug */ @@ -141,6 +144,18 @@ static void liointc_resume(struct irq_chip_generic *gc) } static const char * const parent_names[] = {"int0", "int1", "int2", "int3"}; +static const char * const core_reg_names[] = {"isr0", "isr1", "isr2", "isr3"}; + +static void __iomem *liointc_get_reg_byname(struct device_node *node, + const char *name) +{ + int index = of_property_match_string(node, "reg-names", name); + + if (index < 0) + return NULL; + + return of_iomap(node, index); +} static int __init liointc_of_init(struct device_node *node, struct device_node *parent) @@ -159,10 +174,28 @@ static int __init liointc_of_init(struct device_node *node, if (!priv) return -ENOMEM; - base = of_iomap(node, 0); - if (!base) { - err = -ENODEV; - goto out_free_priv; + if (of_device_is_compatible(node, "loongson,liointc-2.0")) { + base = liointc_get_reg_byname(node, "main"); + if (!base) { + err = -ENODEV; + goto out_free_priv; + } + + for (i = 0; i < LIOINTC_NUM_CORES; i++) + priv->core_isr[i] = liointc_get_reg_byname(node, core_reg_names[i]); + if (!priv->core_isr[0]) { + err = -ENODEV; + goto out_iounmap_base; + } + } else { + base = of_iomap(node, 0); + if (!base) { + err = -ENODEV; + goto out_free_priv; + } + + for (i = 0; i < LIOINTC_NUM_CORES; i++) + priv->core_isr[i] = base + LIOINTC_REG_INTC_STATUS; } for (i = 0; i < LIOINTC_NUM_PARENT; i++) { @@ -172,7 +205,7 @@ static int __init liointc_of_init(struct device_node *node, } if (!have_parent) { err = -ENODEV; - goto out_iounmap; + goto out_iounmap_isr; } sz = of_property_read_variable_u32_array(node, @@ -183,7 +216,7 @@ static int __init liointc_of_init(struct device_node *node, if (sz < 4) { pr_err("loongson-liointc: No parent_int_map\n"); err = -ENODEV; - goto out_iounmap; + goto out_iounmap_isr; } for (i = 0; i < LIOINTC_NUM_PARENT; i++) @@ -195,7 +228,7 @@ static int __init liointc_of_init(struct device_node *node, if (!domain) { pr_err("loongson-liointc: cannot add IRQ domain\n"); err = -EINVAL; - goto out_iounmap; + goto out_iounmap_isr; } err = irq_alloc_domain_generic_chips(domain, 32, 1, @@ -260,7 +293,13 @@ static int __init liointc_of_init(struct device_node *node, out_free_domain: irq_domain_remove(domain); -out_iounmap: +out_iounmap_isr: + for (i = 0; i < LIOINTC_NUM_CORES; i++) { + if (!priv->core_isr[i]) + continue; + iounmap(priv->core_isr[i]); + } +out_iounmap_base: iounmap(base); out_free_priv: kfree(priv); @@ -270,3 +309,4 @@ out_free_priv: IRQCHIP_DECLARE(loongson_liointc_1_0, "loongson,liointc-1.0", liointc_of_init); IRQCHIP_DECLARE(loongson_liointc_1_0a, "loongson,liointc-1.0a", liointc_of_init); +IRQCHIP_DECLARE(loongson_liointc_2_0, "loongson,liointc-2.0", liointc_of_init); |