diff options
Diffstat (limited to 'drivers/staging/board')
| -rw-r--r-- | drivers/staging/board/board.c | 80 | ||||
| -rw-r--r-- | drivers/staging/board/board.h | 5 |
2 files changed, 85 insertions, 0 deletions
diff --git a/drivers/staging/board/board.c b/drivers/staging/board/board.c index d5a6abc84519..8712f566b311 100644 --- a/drivers/staging/board/board.c +++ b/drivers/staging/board/board.c @@ -1,10 +1,27 @@ +/* + * Copyright (C) 2014 Magnus Damm + * Copyright (C) 2015 Glider bvba + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#define pr_fmt(fmt) "board_staging: " fmt + #include <linux/init.h> +#include <linux/irq.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/of_irq.h> + #include "board.h" +static struct device_node *irqc_node __initdata; +static unsigned int irqc_base __initdata; + static bool find_by_address(u64 base_address) { struct device_node *dn = of_find_all_nodes(NULL); @@ -38,3 +55,66 @@ bool __init board_staging_dt_node_available(const struct resource *resource, return false; /* Nothing found */ } + +int __init board_staging_gic_setup_xlate(const char *gic_match, + unsigned int base) +{ + WARN_ON(irqc_node); + + irqc_node = of_find_compatible_node(NULL, NULL, gic_match); + + WARN_ON(!irqc_node); + if (!irqc_node) + return -ENOENT; + + irqc_base = base; + return 0; +} + +static void __init gic_fixup_resource(struct resource *res) +{ + struct of_phandle_args irq_data; + unsigned int hwirq = res->start; + unsigned int virq; + + if (resource_type(res) != IORESOURCE_IRQ || !irqc_node) + return; + + irq_data.np = irqc_node; + irq_data.args_count = 3; + irq_data.args[0] = 0; + irq_data.args[1] = hwirq - irqc_base; + switch (res->flags & + (IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE | + IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL)) { + case IORESOURCE_IRQ_LOWEDGE: + irq_data.args[2] = IRQ_TYPE_EDGE_FALLING; + break; + case IORESOURCE_IRQ_HIGHEDGE: + irq_data.args[2] = IRQ_TYPE_EDGE_RISING; + break; + case IORESOURCE_IRQ_LOWLEVEL: + irq_data.args[2] = IRQ_TYPE_LEVEL_LOW; + break; + case IORESOURCE_IRQ_HIGHLEVEL: + default: + irq_data.args[2] = IRQ_TYPE_LEVEL_HIGH; + break; + } + + virq = irq_create_of_mapping(&irq_data); + if (WARN_ON(!virq)) + return; + + pr_debug("hwirq %u -> virq %u\n", hwirq, virq); + res->start = virq; +} + +void __init board_staging_gic_fixup_resources(struct resource *res, + unsigned int nres) +{ + unsigned int i; + + for (i = 0; i < nres; i++) + gic_fixup_resource(&res[i]); +} diff --git a/drivers/staging/board/board.h b/drivers/staging/board/board.h index e9c914985d4a..3af6dbe22f91 100644 --- a/drivers/staging/board/board.h +++ b/drivers/staging/board/board.h @@ -1,10 +1,15 @@ #ifndef __BOARD_H__ #define __BOARD_H__ + #include <linux/init.h> #include <linux/of.h> +struct resource; + bool board_staging_dt_node_available(const struct resource *resource, unsigned int num_resources); +int board_staging_gic_setup_xlate(const char *gic_match, unsigned int base); +void board_staging_gic_fixup_resources(struct resource *res, unsigned int nres); #define board_staging(str, fn) \ static int __init runtime_board_check(void) \ |