/* adc-ti-adc108s102.h - Private */ /* * Copyright (c) 2015 Intel Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef __ADC108S102_PRIV_H__ #define __ADC108S102_PRIV_H__ #include #include #include #ifdef __cplusplus extern "C" { #endif /* Internal return code */ #define ADC108S102_DONE (-1) /* 8 chans maximum + 1 dummy, 16 bits per-chans -> 18 bytes */ #define ADC108S102_CMD_BUFFER_SIZE 9 /* 1 dummy + 8 results maximum, 16 bits per-chans -> 18 bytes */ #define ADC108S102_SAMPLING_BUFFER_SIZE 9 #define ADC108S102_CHANNELS 8 #define ADC108S102_CHANNELS_SIZE \ (ADC108S102_CHANNELS * sizeof(uint32_t)) #define ADC108S102_CHANNEL_CMD(_channel_) \ sys_cpu_to_be16((_channel_ << 8) << 3) #define ADC108S102_RESULT_MASK 0xfff /* 12 bits resolution */ #define ADC108S102_RESULT(_res_) \ (sys_be16_to_cpu(_res_) & ADC108S102_RESULT_MASK) struct ti_adc108s102_config { const char *spi_port; uint32_t spi_config_flags; uint32_t spi_freq; uint32_t spi_slave; }; struct ti_adc108s102_chan { uint32_t buf_idx; }; struct ti_adc108s102_data { uint16_t cmd_buffer[ADC108S102_CMD_BUFFER_SIZE]; uint8_t cmd_buf_len; uint16_t sampling_buffer[ADC108S102_SAMPLING_BUFFER_SIZE]; uint8_t sampling_buf_len; struct device *spi; struct ti_adc108s102_chan chans[ADC108S102_CHANNELS]; struct adc_seq_table *seq_table; }; #ifdef __cplusplus } #endif #endif /* __ADC108S102_PRIV_H__ */