diff options
author | Andrey Konovalov <andrey.konovalov@linaro.org> | 2013-05-05 02:40:36 +0400 |
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committer | Andrey Konovalov <andrey.konovalov@linaro.org> | 2013-05-05 02:40:36 +0400 |
commit | 314864b5a538c5ec1f871d814974edc37bdc676e (patch) | |
tree | f0d341e6eae1cd5c4ca6180aeb29a00e21ff8a8e /include/linux/irqchip/chained_irq.h | |
parent | e5f042c6edebec55bb20a5e399f892766ac65411 (diff) | |
parent | 8417d689429075fe59d92af4036e25424b13ea9c (diff) |
Merge branch 'tracking-integration-linux-vexpress' into merge-linux-linaro-lsklsk-20130505.0
Diffstat (limited to 'include/linux/irqchip/chained_irq.h')
-rw-r--r-- | include/linux/irqchip/chained_irq.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/include/linux/irqchip/chained_irq.h b/include/linux/irqchip/chained_irq.h new file mode 100644 index 00000000000..adf4c30f3af --- /dev/null +++ b/include/linux/irqchip/chained_irq.h @@ -0,0 +1,52 @@ +/* + * Chained IRQ handlers support. + * + * Copyright (C) 2011 ARM Ltd. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef __IRQCHIP_CHAINED_IRQ_H +#define __IRQCHIP_CHAINED_IRQ_H + +#include <linux/irq.h> + +/* + * Entry/exit functions for chained handlers where the primary IRQ chip + * may implement either fasteoi or level-trigger flow control. + */ +static inline void chained_irq_enter(struct irq_chip *chip, + struct irq_desc *desc) +{ + /* FastEOI controllers require no action on entry. */ + if (chip->irq_eoi) + return; + + if (chip->irq_mask_ack) { + chip->irq_mask_ack(&desc->irq_data); + } else { + chip->irq_mask(&desc->irq_data); + if (chip->irq_ack) + chip->irq_ack(&desc->irq_data); + } +} + +static inline void chained_irq_exit(struct irq_chip *chip, + struct irq_desc *desc) +{ + if (chip->irq_eoi) + chip->irq_eoi(&desc->irq_data); + else + chip->irq_unmask(&desc->irq_data); +} + +#endif /* __IRQCHIP_CHAINED_IRQ_H */ |