| Maxime Ripard | aaeb6df | 2012-05-11 15:35:32 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2011 Free Electrons |
| 3 | * |
| 4 | * Licensed under the GPLv2 or later. |
| 5 | */ |
| 6 | |
| 7 | #ifndef _AT91_ADC_H_ |
| 8 | #define _AT91_ADC_H_ |
| 9 | |
| 10 | /** |
| 11 | * struct at91_adc_reg_desc - Various informations relative to registers |
| 12 | * @channel_base: Base offset for the channel data registers |
| 13 | * @drdy_mask: Mask of the DRDY field in the relevant registers |
| 14 | (Interruptions registers mostly) |
| 15 | * @status_register: Offset of the Interrupt Status Register |
| 16 | * @trigger_register: Offset of the Trigger setup register |
| 17 | */ |
| 18 | struct at91_adc_reg_desc { |
| 19 | u8 channel_base; |
| 20 | u32 drdy_mask; |
| 21 | u8 status_register; |
| 22 | u8 trigger_register; |
| 23 | }; |
| 24 | |
| 25 | /** |
| 26 | * struct at91_adc_trigger - description of triggers |
| 27 | * @name: name of the trigger advertised to the user |
| 28 | * @value: value to set in the ADC's trigger setup register |
| 29 | to enable the trigger |
| 30 | * @is_external: Does the trigger rely on an external pin? |
| 31 | */ |
| 32 | struct at91_adc_trigger { |
| 33 | const char *name; |
| 34 | u8 value; |
| 35 | bool is_external; |
| 36 | }; |
| 37 | |
| 38 | /** |
| 39 | * struct at91_adc_data - platform data for ADC driver |
| 40 | * @channels_used: channels in use on the board as a bitmask |
| 41 | * @num_channels: global number of channels available on the board |
| 42 | * @registers: Registers definition on the board |
| 43 | * @startup_time: startup time of the ADC in microseconds |
| 44 | * @trigger_list: Triggers available in the ADC |
| 45 | * @trigger_number: Number of triggers available in the ADC |
| 46 | * @use_external_triggers: does the board has external triggers availables |
| 47 | * @vref: Reference voltage for the ADC in millivolts |
| 48 | */ |
| 49 | struct at91_adc_data { |
| 50 | unsigned long channels_used; |
| 51 | u8 num_channels; |
| 52 | struct at91_adc_reg_desc *registers; |
| 53 | u8 startup_time; |
| 54 | struct at91_adc_trigger *trigger_list; |
| 55 | u8 trigger_number; |
| 56 | bool use_external_triggers; |
| 57 | u16 vref; |
| 58 | }; |
| 59 | |
| 60 | extern void __init at91_add_device_adc(struct at91_adc_data *data); |
| 61 | #endif |