diff options
Diffstat (limited to 'arch/powerpc/platforms/85xx/mpc85xx_common.c')
| -rw-r--r-- | arch/powerpc/platforms/85xx/mpc85xx_common.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_common.c b/arch/powerpc/platforms/85xx/mpc85xx_common.c new file mode 100644 index 000000000000..49d781c36966 --- /dev/null +++ b/arch/powerpc/platforms/85xx/mpc85xx_common.c @@ -0,0 +1,49 @@ +/* + * Routines common to most mpc85xx-based boards. + * + * This 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/of_platform.h> + +#include <sysdev/cpm2_pic.h> + +#include "mpc85xx.h" + +#ifdef CONFIG_CPM2 +static void cpm2_cascade(unsigned int irq, struct irq_desc *desc) +{ + struct irq_chip *chip = irq_desc_get_chip(desc); + int cascade_irq; + + while ((cascade_irq = cpm2_get_irq()) >= 0) + generic_handle_irq(cascade_irq); + + chip->irq_eoi(&desc->irq_data); +} + + +void __init mpc85xx_cpm2_pic_init(void) +{ + struct device_node *np; + int irq; + + /* Setup CPM2 PIC */ + np = of_find_compatible_node(NULL, NULL, "fsl,cpm2-pic"); + if (np == NULL) { + printk(KERN_ERR "PIC init: can not find fsl,cpm2-pic node\n"); + return; + } + irq = irq_of_parse_and_map(np, 0); + if (irq == NO_IRQ) { + of_node_put(np); + printk(KERN_ERR "PIC init: got no IRQ for cpm cascade\n"); + return; + } + + cpm2_pic_init(np); + of_node_put(np); + irq_set_chained_handler(irq, cpm2_cascade); +} +#endif |