[PATCH V3 14/17] irqchip/gic: Add helper function for configuring a GIC via device-tree
From: Jon Hunter <jonathanh@nvidia.com>
Date: 2016-05-04 16:26:49
Also in:
linux-omap, linux-tegra, lkml
Subsystem:
arm generic interrupt controller drivers, irqchip drivers, the rest · Maintainers:
Marc Zyngier, Thomas Gleixner, Linus Torvalds
Move the code that configures a GIC via device-tree into it's own function. This will allow us to re-use this function when adding a platform driver to support GICs that require power-management. Signed-off-by: Jon Hunter <jonathanh@nvidia.com> --- drivers/irqchip/irq-gic.c | 37 +++++++++++++++++++++++++------------ 1 file changed, 25 insertions(+), 12 deletions(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index a10274926690..2fc5018d6eb9 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c@@ -1194,6 +1194,28 @@ static bool gic_check_eoimode(struct device_node *node, void __iomem **base) return true; } +static int gic_of_setup(struct device_node *node, void __iomem **dist_base, + void __iomem **cpu_base, u32 *percpu_offset) +{ + if (!node || !dist_base || !cpu_base || !percpu_offset) + return -EINVAL; + + *dist_base = of_iomap(node, 0); + if (WARN(!*dist_base, "unable to map gic dist registers\n")) + return -ENOMEM; + + *cpu_base = of_iomap(node, 1); + if (WARN(!*cpu_base, "unable to map gic cpu registers\n")) { + iounmap(*dist_base); + return -ENOMEM; + } + + if (of_property_read_u32(node, "cpu-offset", percpu_offset)) + *percpu_offset = 0; + + return 0; +} + int __init gic_of_init(struct device_node *node, struct device_node *parent) {
@@ -1214,15 +1236,9 @@ gic_of_init(struct device_node *node, struct device_node *parent) of_property_read_bool(node, "power-domains")) return 0; - dist_base = of_iomap(node, 0); - if (WARN(!dist_base, "unable to map gic dist registers\n")) - return -ENOMEM; - - cpu_base = of_iomap(node, 1); - if (WARN(!cpu_base, "unable to map gic cpu registers\n")) { - iounmap(dist_base); - return -ENOMEM; - } + ret = gic_of_setup(node, &dist_base, &cpu_base, &percpu_offset); + if (ret) + return ret; /* * Disable split EOI/Deactivate if either HYP is not available
@@ -1231,9 +1247,6 @@ gic_of_init(struct device_node *node, struct device_node *parent) if (gic_cnt == 0 && !gic_check_eoimode(node, &cpu_base)) static_key_slow_dec(&supports_deactivate); - if (of_property_read_u32(node, "cpu-offset", &percpu_offset)) - percpu_offset = 0; - ret = __gic_init_bases(gic_cnt, -1, dist_base, cpu_base, percpu_offset, &node->fwnode); if (ret) {
--
2.1.4