diff options
Diffstat (limited to 'include/linux/platform_data/at91_adc.h')
| -rw-r--r-- | include/linux/platform_data/at91_adc.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/include/linux/platform_data/at91_adc.h b/include/linux/platform_data/at91_adc.h new file mode 100644 index 00000000000..e15745b4f3a --- /dev/null +++ b/include/linux/platform_data/at91_adc.h @@ -0,0 +1,61 @@ +/* + * Copyright (C) 2011 Free Electrons + * + * Licensed under the GPLv2 or later. + */ + +#ifndef _AT91_ADC_H_ +#define _AT91_ADC_H_ + +/** + * struct at91_adc_reg_desc - Various informations relative to registers + * @channel_base: Base offset for the channel data registers + * @drdy_mask: Mask of the DRDY field in the relevant registers + (Interruptions registers mostly) + * @status_register: Offset of the Interrupt Status Register + * @trigger_register: Offset of the Trigger setup register + */ +struct at91_adc_reg_desc { + u8 channel_base; + u32 drdy_mask; + u8 status_register; + u8 trigger_register; +}; + +/** + * struct at91_adc_trigger - description of triggers + * @name: name of the trigger advertised to the user + * @value: value to set in the ADC's trigger setup register + to enable the trigger + * @is_external: Does the trigger rely on an external pin? + */ +struct at91_adc_trigger { + const char *name; + u8 value; + bool is_external; +}; + +/** + * struct at91_adc_data - platform data for ADC driver + * @channels_used: channels in use on the board as a bitmask + * @num_channels: global number of channels available on the board + * @registers: Registers definition on the board + * @startup_time: startup time of the ADC in microseconds + * @trigger_list: Triggers available in the ADC + * @trigger_number: Number of triggers available in the ADC + * @use_external_triggers: does the board has external triggers availables + * @vref: Reference voltage for the ADC in millivolts + */ +struct at91_adc_data { + unsigned long channels_used; + u8 num_channels; + struct at91_adc_reg_desc *registers; + u8 startup_time; + struct at91_adc_trigger *trigger_list; + u8 trigger_number; + bool use_external_triggers; + u16 vref; +}; + +extern void __init at91_add_device_adc(struct at91_adc_data *data); +#endif |