c9fbf7e070
The WM8994 has an interrupt controller which supports interrupts for both CODEC and GPIO portions of the chip. Support this using genirq, while allowing for systems that do not have an interrupt hooked up. Wrapper functions are provided for the IRQ request and free to simplify the code in consumer drivers when handling cases where IRQs are not set up. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Samuel Ortiz <sameo@linux.intel.com>
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/*
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* include/linux/mfd/wm8994/core.h -- Core interface for WM8994
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*
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* Copyright 2009 Wolfson Microelectronics PLC.
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*
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* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#ifndef __MFD_WM8994_CORE_H__
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#define __MFD_WM8994_CORE_H__
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#include <linux/interrupt.h>
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struct regulator_dev;
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struct regulator_bulk_data;
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#define WM8994_NUM_GPIO_REGS 11
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#define WM8994_NUM_LDO_REGS 2
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#define WM8994_NUM_IRQ_REGS 2
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#define WM8994_IRQ_TEMP_SHUT 0
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#define WM8994_IRQ_MIC1_DET 1
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#define WM8994_IRQ_MIC1_SHRT 2
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#define WM8994_IRQ_MIC2_DET 3
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#define WM8994_IRQ_MIC2_SHRT 4
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#define WM8994_IRQ_FLL1_LOCK 5
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#define WM8994_IRQ_FLL2_LOCK 6
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#define WM8994_IRQ_SRC1_LOCK 7
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#define WM8994_IRQ_SRC2_LOCK 8
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#define WM8994_IRQ_AIF1DRC1_SIG_DET 9
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#define WM8994_IRQ_AIF1DRC2_SIG_DET 10
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#define WM8994_IRQ_AIF2DRC_SIG_DET 11
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#define WM8994_IRQ_FIFOS_ERR 12
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#define WM8994_IRQ_WSEQ_DONE 13
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#define WM8994_IRQ_DCS_DONE 14
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#define WM8994_IRQ_TEMP_WARN 15
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/* GPIOs in the chip are numbered from 1-11 */
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#define WM8994_IRQ_GPIO(x) (x + WM8994_IRQ_TEMP_WARN)
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struct wm8994 {
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struct mutex io_lock;
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struct mutex irq_lock;
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struct device *dev;
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int (*read_dev)(struct wm8994 *wm8994, unsigned short reg,
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int bytes, void *dest);
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int (*write_dev)(struct wm8994 *wm8994, unsigned short reg,
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int bytes, void *src);
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void *control_data;
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int gpio_base;
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int irq_base;
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int irq;
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u16 irq_masks_cur[WM8994_NUM_IRQ_REGS];
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u16 irq_masks_cache[WM8994_NUM_IRQ_REGS];
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/* Used over suspend/resume */
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u16 ldo_regs[WM8994_NUM_LDO_REGS];
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u16 gpio_regs[WM8994_NUM_GPIO_REGS];
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struct regulator_dev *dbvdd;
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struct regulator_bulk_data *supplies;
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};
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/* Device I/O API */
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int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg);
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int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
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unsigned short val);
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int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg,
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unsigned short mask, unsigned short val);
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int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg,
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int count, u16 *buf);
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/* Helper to save on boilerplate */
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static inline int wm8994_request_irq(struct wm8994 *wm8994, int irq,
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irq_handler_t handler, const char *name,
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void *data)
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{
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if (!wm8994->irq_base)
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return -EINVAL;
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return request_threaded_irq(wm8994->irq_base + irq, NULL, handler,
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IRQF_TRIGGER_RISING, name,
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data);
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}
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static inline void wm8994_free_irq(struct wm8994 *wm8994, int irq, void *data)
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{
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if (!wm8994->irq_base)
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return;
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free_irq(wm8994->irq_base + irq, data);
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}
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int wm8994_irq_init(struct wm8994 *wm8994);
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void wm8994_irq_exit(struct wm8994 *wm8994);
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#endif
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