char *qfprom_read(struct device *dev, const char *cname)
{
struct nvmem_cell *cell;
ssize_t data;
char *ret;
cell = nvmem_cell_get(dev, cname);
if (IS_ERR(cell))
return ERR_CAST(cell);
ret = nvmem_cell_read(cell, &data);
nvmem_cell_put(cell);
return ret;
}
static int sc27xx_adc_scale_calibration(struct sc27xx_adc_data *data,
bool big_scale)
{
const struct sc27xx_adc_linear_graph *calib_graph;
struct sc27xx_adc_linear_graph *graph;
struct nvmem_cell *cell;
const char *cell_name;
u32 calib_data = 0;
void *buf;
size_t len;
if (big_scale) {
calib_graph = &big_scale_graph_calib;
graph = &big_scale_graph;
cell_name = "big_scale_calib";
} else {
calib_graph = &small_scale_graph_calib;
graph = &small_scale_graph;
cell_name = "small_scale_calib";
}
cell = nvmem_cell_get(data->dev, cell_name);
if (IS_ERR(cell))
return PTR_ERR(cell);
buf = nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (IS_ERR(buf))
return PTR_ERR(buf);
memcpy(&calib_data, buf, min(len, sizeof(u32)));
/* Only need to calibrate the adc values in the linear graph. */
graph->adc0 = sc27xx_adc_get_calib_data(calib_data, calib_graph->adc0);
graph->adc1 = sc27xx_adc_get_calib_data(calib_data >> 8,
calib_graph->adc1);
kfree(buf);
return 0;
}
