linux-imx
Public
Source
committed 595a86af49f89
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ret = spi_w8r16(spi, reg);90
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return ret;91
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}92
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static int ads7871_write_reg8(struct spi_device *spi, int reg, u8 val)94
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{95
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u8 tmp[2] = {reg, val};96
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return spi_write(spi, tmp, sizeof(tmp));97
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}98
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static ssize_t show_voltage(struct device *dev,100
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struct device_attribute *da, char *buf)99
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static ssize_t voltage_show(struct device *dev, struct device_attribute *da,100
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char *buf)101
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{102
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struct ads7871_data *pdata = dev_get_drvdata(dev);103
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struct spi_device *spi = pdata->spi;104
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struct sensor_device_attribute *attr = to_sensor_dev_attr(da);105
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int ret, val, i = 0;106
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uint8_t channel, mux_cnv;107
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channel = attr->index;109
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/*110
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* TODO: add support for conversions131
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if (mux_cnv == 0) {132
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val = ads7871_read_reg16(spi, REG_LS_BYTE);133
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/*result in volts*10000 = (val/8192)*2.5*10000*/134
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val = ((val >> 2) * 25000) / 8192;135
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return sprintf(buf, "%d\n", val);136
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} else {137
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return -1;138
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}139
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}140
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static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_voltage, NULL, 0);142
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static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_voltage, NULL, 1);143
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static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_voltage, NULL, 2);144
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static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_voltage, NULL, 3);145
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static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_voltage, NULL, 4);146
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static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_voltage, NULL, 5);147
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static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_voltage, NULL, 6);148
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static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_voltage, NULL, 7);141
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static SENSOR_DEVICE_ATTR_RO(in0_input, voltage, 0);142
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static SENSOR_DEVICE_ATTR_RO(in1_input, voltage, 1);143
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static SENSOR_DEVICE_ATTR_RO(in2_input, voltage, 2);144
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static SENSOR_DEVICE_ATTR_RO(in3_input, voltage, 3);145
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static SENSOR_DEVICE_ATTR_RO(in4_input, voltage, 4);146
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static SENSOR_DEVICE_ATTR_RO(in5_input, voltage, 5);147
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static SENSOR_DEVICE_ATTR_RO(in6_input, voltage, 6);148
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static SENSOR_DEVICE_ATTR_RO(in7_input, voltage, 7);149
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static struct attribute *ads7871_attrs[] = {151
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&sensor_dev_attr_in0_input.dev_attr.attr,152
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&sensor_dev_attr_in1_input.dev_attr.attr,153
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&sensor_dev_attr_in2_input.dev_attr.attr,154
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&sensor_dev_attr_in3_input.dev_attr.attr,155
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&sensor_dev_attr_in4_input.dev_attr.attr,156
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&sensor_dev_attr_in5_input.dev_attr.attr,157
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&sensor_dev_attr_in6_input.dev_attr.attr,158
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&sensor_dev_attr_in7_input.dev_attr.attr,