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Diffstat (limited to 'include/linux/platform_data/at91_adc.h')
-rw-r--r--include/linux/platform_data/at91_adc.h61
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
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index 000000000000..e15745b4f3a5
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+++ b/include/linux/platform_data/at91_adc.h
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+/*
+ * 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